Revision Rate Research Articles

Results of third generation dual mobility total hip arthroplasties with non-cross-linked polyethylene in patients under 60 years of age: comparative study of full pressfit vs. tripod cups after 8.6 years

BackgroundThe concept of dual mobility of total hip arthroplasties (THA) is a revolution in the prevention of dislocations and in the treatment of instability. Its use remains controversial in patients under 60 years old, providing poorer results with first generation cups coated with alumina. This study, carried out on modern dual mobility (DM) cups with a porous bilayer coating, in active patients under 60 years of age aimed to evaluate: (1) the mechanical survival of two latest generation DM THA, with failure defined as revision of acetabular or femoral implants for mechanical loosening, by comparing a tripod cup to a full pressfit cup, (2) to evaluate the complications, (3) to compare the rate of radiographic peri-prosthetic osteolysis between the 2 implants. HypothesisThe hypothesis was that the medium-term survival of modern DM cups placed in young patients was the same regardless of the type of acetabular fixation used. Materials and methodsThis was a retrospective study of 119 latest generation DM THA with standard polyethylene, composed of 66 full pressfit cups and 53 tripod fixation cups, used in primary arthroplasty in 111 patients between 2005 and 2016. The survival study was carried out using medical records. The clinical evaluation was carried out using the modified Harris Hip Score (mHHS) as well as the self-administered Hip and Osteoarthritis Outcome Score (HOOS) and Oxford-12 questionnaires. Radiological analysis was carried out on radiographs looking for bone demineralization and acetabular and femoral lines. ResultsAt 8.6 years (5–16), no revision for mechanical loosening was observed regardless of the type of cup. The prosthesis dislocation rate (large joint) was 1.7%: 1 case in each group (p = 1), including one revision required in the full pressfit group. Three revisions for mechanical complications were recorded: a recurrent dislocating hip on a full pressfit cup that was not sufficiently anteverted, an acetabular peri-prosthetic fracture on a full pressfit cup and a case of iliopsoas impingement with a retroverted tripod cup. The survival rate for all-cause revision was 93.8% for pressfit (95% CI: 88.2%–99.9%) vs. 96.2% for tripod (95% CI: 91.1%–100%) (p = 0.63) and for revision due to any cause excluding infection, 96.9% for pressfit (95% CI: 92.8%–100%) vs. 98.1% for tripod (95% CI: 94.4%–100%) (p = 0.7). The rate of periacetabular osteolysis was 11%, significantly more present amongst tripod cups (24%, 9 cases) compared to full pressfit cups (2%, 1 case) (p < 0.01). ConclusionThis series demonstrates good performance of 3rd generation DM cups with porous bilayer coating in patients under 60 years of age regardless of the type of acetabular fixation, at 8.6 years of follow-up. The rate of osteolysis around full pressfit cups remains very low, unlike that of tripod cups. The use of Double Mobility prostheses for primary hip osteoarthritis is possible in young patients, preferably with full pressfit cups (i.e., without any pegs or additional screws that may promote diffusion of polyethylene debris and osteolysis). Level of evidenceIII; comparative retrospective study.

Anterior Vertebral Body Tethering: A Single-Center Cohort with 4.3 to 7.4 Years of Follow-up.

Vertebral body tethering (VBT) is a well-recognized, non-fusion alternative for idiopathic scoliosis in children with growth remaining. To date, there have been almost no published outcome studies with postoperative follow-up of >2 years. We aimed to fill this gap by evaluating mid-term outcomes in our first 31 consecutive patients. We retrospectively assessed additional clinical and radiographic data (mean, 5.7 ± 0.7 years) from our first 31 consecutive patients. Assessments included standard deformity measures, skeletal maturity status, and any additional complications (e.g., suspected broken tethers or surgical revisions). Using the same definition of success (i.e., all residual deformities, instrumented or uninstrumented, ≤30° at maturity; no posterior spinal fusion), we revisited the success rate, revision rate, and suspected broken tether rate. Of our first 31 patients treated with VBT, 29 (of whom 28 were non-Hispanic White and 1 was non-Hispanic Asian; 27 were female and 2 were male) returned for additional follow-up. The success rate dropped to 64% with longer follow-up as deformity measures increased, and the revision rate increased to 24% following 2 additional surgical revisions. Four additional suspected broken tethers were identified, for a rate of 55%, with only 1 occurring beyond 4 years. No additional patients had conversion to a posterior spinal fusion. We observed a mean increase of 4° (range, 2° to 8°) in main thoracic deformity measures and 8° (range, 6° to 12°) in thoracolumbar deformity measures. With >5 years of follow-up, we observed a decrease in postoperative success, as progression of the deformity was observed in most subgroups, and an increase in the revision and suspected broken tether rates. No additional patients had conversion to a posterior spinal fusion, which may indicate long-term survivorship. Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.

Anterior cruciate ligament primary repair revision rates are increased in skeletally mature patients under the age of 21 compared to reconstruction, while adults (>21 years) show no significant difference: A systematic review and meta-analysis.

To evaluate the impact of age as a risk factor on the revision rates of anterior cruciate ligament (ACL) primary repair (ACLPR), dynamic intraligamentary stabilization (DIS) and bridge-enhanced ACL restoration (BEAR) compared to ACL reconstruction (ACLR). A systematic literature search was performed for comparative studies comparing outcomes for ACLPR, DIS or BEAR to ACLR. A random-effects meta-analysis was performed to assess nondifferentiated and age-differentiated (skeletally mature patients ≤21 and >21 years) ACL revision and reoperation risk, as well as results for subjective outcomes. Methodological study quality was assessed using the Risk of Bias Tool 2.0c and Methodological Index for Nonrandomized Studies tools. A total of 12 studies (n = 1277) were included. ACLR demonstrated a lower nonage-stratified revision risk at 2 years versus ACLPR, DIS and BEAR, but a similar revision risk at 5 years when compared to DIS. However, an age-stratified analysis demonstrated a significantly increased ACLPR revision risk as compared to ACLR in skeletally mature patients ≤21 years of age (risk ratios [RR], 6.33; 95% confidence interval [CI], 1.18-33.87, p = 0.03), while adults (>21 years) showed no significant difference between groups (RR, 1.48; 95% CI, 0.25-8.91, n.s.). Furthermore, DIS reoperation rates were significantly higher than respective ACLR rates (RR, 2.22; 95% CI, 1.35-3.65, p = 0.002), whereas BEAR (RR, 1.07; 95% CI, 0.41-2.75, n.s.) and ACLPR (RR, 0.81; 95% CI, 0.21-3.09, n.s.) showed no differences. IKDC scores were equivalent for all techniques. However, ACLPR exhibited significantly better FJS (mean difference, 11.93; 95% CI, 6.36-17.51, p < 0.0001) and Knee injury and Osteoarthritis Outcome Score Symptoms (mean difference, 3.01; 95% CI, 0.42-5.60, p = 0.02), along with a lower Tegner activity reduction. ACLPR in skeletally mature patients ≤21 years of age is associated with up to a six-fold risk increase for ACL revision surgery compared to ACLR; however, adults (>21 years) present no significant difference. Based on the current data, age emerges as a crucial risk factorand should be considered when deciding on the appropriate treatment option in proximal ACL tears. Level III.

Cementless short stem total hip arthroplasty in patients older than 75 years: is it feasible?

BackgroundIn recent years, the indication for cementless short stem total hip arthroplasty (THA) has been widened to elderly patients as they might profit by the advantages of the short-curved implant design as well. Therefore, this study was conducted to evaluate the clinical and radiological outcome of a cementless short stem in elderly patients (≥ 75 years) compared to a young control group (≤ 60 years).MethodsA retrospective cohort of 316 THAs performed between 2014 and 2017 was prospectively examined. In all patients a cementless, curved short stem and press-fit cup (Fitmore® stem; Allofit®/-S cup; both ZimmerBiomet, Warsaw, IN, USA) were implanted via a minimally-invasive anterolateral approach. Clinical and radiological outcome as well as rate of complications and revision were assessed.ResultsIn total, 292 patients have been included for analysis of complications and revisions (Øfollow-up: 4.5 years) and 208 patients for clinical and radiological outcome (Øfollow-up: 4.4 years). Complication rate was significantly increased in elderly patients (13.7% vs. 5.8%, p = 0.023), while the revision rate was increased without statistical significance (5.2% vs. 2.2%, p = 0.169). Periprosthetic fractures occurred significantly higher in the elderly patients (5.2% vs. 0.7%; p = 0.026). Both groups showed a comparable clinical outcome in the Harris Hip Score (93.7 vs. 91.9; p = 0.224), Oxford Hip Score (44.5 vs. 43.7; p = 0.350), Forgotten Joint Score (81.7 vs. 81.5; p = 0.952) and WOMAC (7.4 vs. 9.3; p = 0.334).ConclusionCementless short stem total hip arthroplasty shows a comparable clinical and radiological outcome in patients over 75 years of age compared to younger patients under 60 years of age. However, cementless shorts stem THA shows an increased rate of overall complications and periprosthetic fractures in elderly patients over 75 years of age. Cemented fixation of the femoral component should be considered in patients over 75 years of age.Level of evidenceIII Case-controlled study.Trial registrationObservational study without need for trial registration due to ICMJE criteria.

898 Is Primary Total Hip Arthroplasty Safe in Recipients of Solid Organ Transplants, and What Are the Considerations? a Systematic Review and Meta-analysis

Abstract Aim Solid organ transplantation (SOT) is rising, with improvements in surgical technique and immunosuppressive therapy increasing patient survival. Age-related degeneration and long-term steroid therapy in SOT recipients lead to higher incidence of osteoarthritis and osteonecrosis. Total hip arthroplasty (THA) is offered electively for these indications. This meta-analysis assessed THA-related complications in SOT versus non-SOT recipients, reporting revision, infection rates, and all-cause mortality. Method This review was carried out using the PRISMA framework. A literature search of Medline, Embase, Transplant library, and Cochrane Library was carried out. Full text articles were screened. Summary statistics for outcomes of interest underwent meta-analyses to a confidence interval (CI) of 95% and are presented as Forest plots for Odds Ratio (OR). Results Literature search returned 1164 unique titles/s. 36 met inclusion criteria; 6 were retrospective cohort-studies. Meta-analysis of 5 studies showed no evidence of significant increase in revision rates with prior SOT, OR=0.67 (95%CI: 0.36-1.23, p=0.19). Meta-analysis of 6 studies showed no significant increase in infection (joint/surgical site) infection with prior SOT, OR=1.18 (95%CI: 0.40-3.50, p=0.77). Meta-analysis of 3 studies showed significant increase in all-cause mortality over 12 months post-arthroplasty, OR=1.99 (95%CI: 0.99-3.99, p=0.05). We report these summary statistics for the remaining case series. Conclusions We conclude that there is no significant increase in revision and infection rates for THA in SOT recipients. Consideration of a significant increase in all-cause mortality must be noted prior to offering this procedure to SOT recipients. Prospective studies are needed to assess risks/benefits of THA in SOT recipients.

Management of Distal Tibial Deformity Secondary to Traumatic Physeal Arrest: Systematic Review and Meta-Analysis

Abstract Background Injuries of the ankle growth plate are the second most common physeal injury of the childhood and comprises 6% of all fractures of the tibia. These injuries are typically observed among children 10 to 12 years of age, usually as Salter-Harris (SH) Type 1 and Type 2 fractures followed by Type 3 and Type 4 fractures. Objective To review modalities of treatment for distal tibia deformity secondary to physeal arrest post traumatic and to perform a systematic review and meta- analysis of the outcome for different methods of treatment. Methodology The included studies published between 2000 and 2021. Regarding the type of included studies, 8 studies (out of 10 studies) were retrospective; while 2 studies were prospective. Results Meta-analysis study was done on 6 studies which described Epiphysiodesis technique for distal tibial deformities secondary to post-traumatic physeal arrest; with overall number of patients (N = 215). We calculated efficacy for each technique through (Bone union ―success rate‖) and (Excellent functional outcome). We calculated safety for each technique through (Revision rate) and (Complication’s rate). Data Sources Medline databases (PubMed, Medscape, ScienceDirect. EMF-Portal) and all materials available in the Internet till 2022. Conclusion Ilizarov technique for corrections of post-traumatic physeal arrest ankle deformities showed better efficacy and safety profiles, compared to Epiphysiodesis. Which also, showed relatively good efficacy and safety especially in children with post-traumatic physeal arrest ankle deformities.

Comparative Study between Percutaneous Ilioilial Fixator versus Percutaneous Iliosacral Screw in Managing Sacral Fractures

Abstract Background The sacrum is the mechanical nucleus of the axial skeleton, located at the base of the lumbar spine and acts as the keystone at the centre of the pelvic ring. Traumatic sacral fractures are an increasingly recognized diagnosis. Sacral fractures remain a relative uncommon entity in the general population. Objective The aim of this work is to compare between percutaneous iliosacral screw and ilioilial fixation in sacral fractures fixation as regard operative time, need of intraoperative fluoroscopy, blood loss &amp; related transfusion, infection, neurovascular complication, hardware failure and screws miss- displacement, clinical and radiological outcomes, revision rate and rate of non-union. Patients and Methods After obtaining the hospitals Research/Ethics Committee approval and written informed consents from the patients. This study was carried on 51 Patients with sacral fractures injuries through the period from August 2019 to November 2021. A prospective randomized controlled clinical trial was conducted to compare the functional and radiological outcome of closed reduction and percutaneous fixation of traumatic sacral fractures using iliosacral screw or ilioilial fixator. Results There is no statistically significant difference in functional outcome, radiological outcome operative time, blood loss, postoperative complication, union rate or follow up. There is statistically significant difference in incision length between the two groups as mean length of incision in iliosacral screw and Ilioilial fixator is 1.2 cm and 4.8 cm respectively. There is statistically significant relation between number of intraoperative fluoroscopic and fixation principles (P value &amp;lt;0.001) with higher risk for radiation exposure in IS screw group. Conclusion Iliosacral screw and ilioilial fixator have comparable functional and radiological outcome and similar biomechanical stability .We suggest the ilioilial fixator as an alternative to IS screw in sacral fracture management. The ilioilial fixator is a useful option in patients who do not qualify for IS screw fixation.

Custom Endoprosthesis-Assisted Pediatric Microsurgical Jaw Reconstruction.

Surgical treatment of pediatric maxillary and mandibular tumors can cause significant postresection disfigurement, mastication, and speech dysfunction. The need to restore form and function without compromising growth at the recipient and donor sites poses a particular reconstructive dilemma. This study evaluates outcomes of the custom endoprosthesis (CE) compared with noncustom reconstruction (NCR) and introduces an algorithm using CE to optimize available soft tissue reconstructive options. An Institutional Review Board-approved retrospective review of all patients undergoing maxillary or mandibular reconstruction between 2016 and 2022 was completed. The independent variable of interest was CE utilization. Primary outcomes of interest included hardware failure/removal or exposure, major complications, and revision surgeries. Covariates of interest included patient demographics, medical comorbidities, tumor size, and pathologic diagnosis. Statistical analyses including independent t test, χ2 analyses, and univariate/multivariate logistic regression were performed using RStudio version 4.2.1. Fifty-one patients (37 mandible and 14 maxilla) underwent CE or NCR. Of patients, 37% (n = 19) received CE. Of patients who underwent mandibular reconstruction, there were significantly lower rates of hardware exposure (14.3% versus 47.8%, P = 0.018), failure (7.1% versus 43.5%, P = 0.048), major complications (28.6% versus 78.2%, P = 0.008), and revisions (11.1% versus 50.0%, P = 0.002) in the CE cohort compared with the NCR cohort. The rates of hardware failure, exposure, major complications, and revisions did not significantly differ in maxillary reconstructions, however, CE successfully reconstructed significantly larger defects (179.5 versus 74.6cm3, P = 0.020) than NCRs. Deviating from NCR, the authors propose an algorithm considering anatomical location, extent of resection, and patient age for soft tissue selection. This algorithm yielded improved mandibular reconstructive outcomes and no increase in complications rate in maxillary reconstruction despite larger resection defects. Furthermore, the authors' initial findings demonstrate that CE is a safe option for pediatric maxillary and mandibular reconstruction that may, in addition, facilitate improved form and function.

Comparing Complication Rates, Costs, and Length of Stay between Unicompartmental and Total Knee Arthroplasty: Insights from a Big Data Analysis Using the National Inpatient Sample Dataset.

Background: Unicompartmental knee arthroplasty (UKA) is increasingly used for knee osteoarthritis due to faster recovery, better range of motion, and lower costs compared to total knee arthroplasty (TKA). While TKA may offer longer-lasting results with lower revision rates, this study compares the relative benefits and limitations of UKA and TKA using the National Inpatient Sample (NIS) database. Methods: This retrospective analysis examined outcomes of elective UKA and TKA procedures from 2016 to 2019, identifying 2,606,925 patients via ICD-10 codes. Propensity score matching based on demographics, hospital characteristics, and comorbidities resulted in a balanced cohort of 136,890 patients. The present study compared in-hospital mortality, length of stay, postoperative complications, and hospitalization costs. Results: The results showed that UKA procedures increased significantly over the study period. Patients undergoing UKA were generally younger with fewer comorbidities. After matching, both groups had low in-hospital mortality (0.015%). UKA patients had shorter hospital stays (1.53 vs. 2.47 days) and lower costs (USD 55,976 vs. USD 61,513) compared to TKA patients. UKA patients had slightly higher rates of intraoperative fracture and pulmonary edema, while TKA patients had higher risks of blood transfusion, anemia, coronary artery disease, pulmonary embolism, pneumonia, and acute kidney injury. Conclusions: UKA appears to be a less-invasive, cost-effective option for younger patients with localized knee osteoarthritis.

Modeling highly crosslinked polyethylene vs. non–highly crosslinked polyethylene glenoid revision rates for anatomic shoulder arthroplasty in osteoarthritis including differing polyethylene glenoid fixation designs

BackgroundWe compared anatomic total shoulder arthroplasty (aTSA) for osteoarthritis to both highly crosslinked polyethylene (XLPE) and non–highly crosslinked polyethylene (non-XLPE) to determine the rate of revision for multiple patient and implant characteristics, modeling the effect of variation in glenoid fixation design (glenoid component type). MethodsData from a large national arthroplasty registry were analyzed for the period April 16, 2004, to December 31, 2022. The study population included all primary aTSA (stemmed and stemless shoulder arthroplasty) procedures with a primary diagnosis of osteoarthritis and performed using prostheses in current use. These procedures were grouped into 2 cohorts: all polyethylene-bearing glenoid components with either XLPE or non-XLPE. The cumulative percent revision was determined using Kaplan–Meier estimates of survivorship and hazard ratios from Cox proportional hazard models adjusted for age, sex, humeral head size, humeral fixation, type of primary (total stemmed or stemless anatomic), glenoid component type (modular and nonmodular metal-backed glenoid, cemented polyethylene glenoid, and polyethylene glenoid with modified central peg), and surgeon volume (after 2008). Possible interactions were examined. A subanalysis from January 1, 2017, captured the additional patient demographics of American Society of Anesthesiologists score, body mass index, and glenoid morphology. ResultsOf 11,003 aTSA procedures, the cumulative percent revision at 14 years for all XLPE glenoids (n = 3865) was 5.8% (95% confidence interval [CI] 3.9, 8.7), and 18.7% (95% CI 16.6, 21.0) for non-XLPE (n = 7138). XLPE had a lower rate of revision from 2 years (non-XLPE vs. XLPE 2 years + hazard ratio = 1.66, (95% CI 1.09, 2.53), P = .018) adjusting for age, sex, humeral head size, type of primary, humeral stem fixation, and glenoid component type. Overall, glenoid component type and polyethylene type were strongly associated (P < .001 and P = .021, respectively) with all-cause aTSA revision rates. The difference between non-XLPE and XLPE is observed across all polyethylene glenoid types. When considering procedures performed between 2017 and 2022, XLPE vs. non-XLPE rates of revision were not significantly different with extended adjustment at subanalysis, but loosening did not predominate for non-XLPE until year 6 of follow-up. ConclusionBoth the glenoid design and the type of polyethylene predict the revision rate for aTSA. However, the relative rates of revision between glenoid designs did not differ with polyethylene type. While the polyethylene type was not associated with aTSA revision rates in a more contemporary analysis, the incidence of loosening in non-XLPE prostheses combinations was higher from 6 years may explain this.

Comparison of Clinical Outcomes After Medial Patellofemoral Ligament Reconstruction With Allograft Versus Autograft: A Matched-Cohort Analysis.

Disruption of the medial patellofemoral ligament (MPFL) may lead to recurrent lateral patellar dislocation and patellofemoral chondral injury. Despite significant previous work investigating numerous performance parameters, the optimal graft choice for MPFL reconstruction for patellar instability remains unclear. To compare functional outcomes scores, subjective recurrent instability, and revision rates between autograft and allograft in MPFL reconstruction. Cohort study; Level of evidence, 3. Patients who underwent MPFL reconstruction with autograft between 2013 and 2018 were identified. A 2:1 comparison group of patients who underwent MPFL reconstruction with allograft was matched by sex, age (±3 years), and body mass index (BMI) (±3 kg/m2). Patient characteristics, preoperative radiograph measurements, and intraoperative data were compared between the groups, as were patient-reported outcome measures, including International Knee Documentation Committee (IKDC) score, Lysholm score, Single Assessment Numerical Evaluation (SANE), and visual analog scale (VAS) for pain. Subjective recurrent instability and revision rate were also compared between groups. The autograft group was composed of 30 patients (13 male, 17 female) with a mean age of 24.4 years and mean BMI of 25.0 kg/m2, and the allograft group was composed of 60 matched patients (25 male, 35 female) with a mean age of 24.1 years and mean BMI of 25.1 kg/m2. The autograft and allograft groups reported similar IKDC scores (73.0 vs 73.7; P = .678), Lysholm scores (77.5 vs 80.7; P = .514), SANE (72.0 vs 75.8; P = .236), and VAS pain (30.7 vs 26.6; P = .482), as well as similar rates of postoperative patellar subluxations (20.0% vs 19.3%; P = .867) and dislocations (10.0% vs 15.0%; P = .805). Both allograft and autograft were found to be viable options for MPFL reconstruction. There were no significant group differences in failure rates, patient-reported outcomes, pain, or complications between autograft and allograft MPFL reconstruction in this series.

Poster 344: The New "Terrible Triad": Anterior Cruciate Ligament Reconstruction With Concurrent Meniscal Lateral Root and Medial Ramp Repairs

Objectives: The purpose of this paper was to compare patient reported outcomes (PROMs) between isolated anterior cruciate ligament (ACLR) and ACLR with concomitant medial meniscus ramp and lateral meniscus root repairs and compare PROMs between different medial meniscus ramp and lateral meniscus root repair techniques. Methods: All patients with isolated (ISO) ACL reconstruction or ACL reconstruction with concomitant medial meniscus ramp and lateral meniscus root repairs with a minimum 2 years of follow-up were retrospectively evaluated. Institutional review board approval was obtained for this study. A final total of 42 ISO-ACL patients were matched based upon age, sex, and body mass index to 40 in the “terrible triad” (TT) cohorts. Outcome measures were obtained from 32 patients in the ISO cohort, and 38 patients in the TT cohort. The PROMs used for this study include the International Knee Documentation Committee (IKDC) Subjective Knee, Cincinnati, Tegner, Lysholm, Veterans RAND 12-Item Health Survey (VR-12), and Knee Injury and Osteoarthritis Outcomes Score (KOOS) questionnaire forms. T tests and chi-square goodness of fit tests were used to compare the above PROMs both pre- and postoperatively within each cohort, and between cohorts and rates of revision or reoperation. Results: The preoperative and postoperative PROMs between patients in the isolated cohort and the triad cohort demonstrated no significant differences, except for the Physical category of the VR-12, in which the triad cohort had significantly higher results (p = 0.04) (Figure 1). Both the isolated cohort and the triad cohort reported significant differences between pre- and postoperative PROMs within their own cohorts. When comparing methods of surgery, including all-inside vs. inside-out for the medial meniscus repairs and tunnel versus no-tunnel for the lateral meniscus root repairs, no significant differences were found between postoperative PROMs. Additionally, no significant difference was found in revision or reoperative rates between the triad and isolated cohorts (p = 0.374) (Figure 2), the all-inside versus inside-out medial meniscus cohorts (p = 0.267), or the tunnel vs. no-tunnel lateral meniscus cohorts (p = 0.781). Conclusions: There was no significant difference in PROMs between isolated ACLR versus ACLR with concomitant medial meniscus ramp and lateral meniscus root repairs. While the complexity of the TT ACLR patients was more involved, PROMs and healing rates were similar and performing concurrent medial ramp and lateral root repairs at the time of ACLR should be considered.

A Comparison of PROMIS Scores of Metatarsophalangeal Joint Arthrodesis and Polyvinyl Alcohol Hydrogel Implant Hemiarthroplasty for Hallux Rigidus.

The current literature shows similar clinical outcomes between first metatarsophalangeal (MTP) joint arthrodesis and synthetic cartilage implant (SCI) hemiarthroplasty in the treatment of hallux rigidus; however, prior studies have not reported validated patient-reported outcome measures (PROMs). To our knowledge, this is the first study to compare PROMs using 6 domains of the validated Patient-Reported Outcomes Measurement Information System (PROMIS) in patients treated for hallux rigidus with MTP joint arthrodesis and with SCI hemiarthroplasty. In addition, this novel study provides comparative data on the complication and revision rates for each procedure. A single-center, retrospective registry search identified all patients with preoperative PROMIS scores who underwent MTP joint arthrodesis or SCI hemiarthroplasty for hallux rigidus between February 2016 and June 2021. The study aimed to determine if the 2 procedures showed statistically or clinically equivalent PROMIS scores in 6 domains: physical function, pain interference, pain intensity, global physical health, global mental health, and depression. A multivariable linear regression analysis was performed to compare adjusted 1-year postoperative PROMIS scores between the 2 cohorts. Complication and revision rates were also compared. The study included 82 patients who underwent SCI hemiarthroplasty and 101 who underwent MTP joint arthrodesis. Demographic data and preoperative hallux rigidus severity showed no significant differences between the cohorts. PROMIS scores were mostly comparable between the 2 groups, except for the pain intensity domain. The patients who underwent MTP joint arthrodesis exhibited significantly better pain relief at 1 and 2 years postoperatively, which was supported by adjusted postoperative PROMIS scores. At 2 years, the SCI group had worse pain intensity scores and lower global physical health scores. There were no differences between the cohorts in additional PROMIS scores or complication data. While outcomes in most of the domains were similar, MTP joint arthrodesis was more effective at mitigating pain intensity compared with SCI hemiarthroplasty. This information can guide patient counseling and decision-making when considering surgical intervention for hallux rigidus. Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.

Paper 29: Incidental Teres Minor Atrophy in Patients Undergoing Arthroscopic Rotator Cuff Repair of the Supraspinatus Occurs Frequently and is Associated with Worse Postoperative Outcomes Without Higher Failure Rates

Objectives: Fatty infiltration and rotator cuff atrophy has been associated with poor clinical outcomes during rotator cuff repairs. Compared to supraspinatus and infraspinatus atrophy there has been minimal research on the effect of teres minor atrophy on surgical outcomes and failure rates in rotator cuff repairs. The purpose of this study was to assess the incidence and outcomes of arthroscopic rotator cuff repairs (ARCR) for partial and full thickness supraspinatus tears in patients with incidentally identified teres minor fatty infiltration. Methods: A consecutive series of 272 shoulders from 256 patients who underwent arthroscopic, double row transosseous equivalent repairs by 3 fellowship trained surgeons with minimum 1 years follow up for partial and full thickness tears of the supraspinatus tendon was reviewed. Revision repairs and concomitant subscapularis repairs were excluded. Preoperative MRI was reviewed to classify teres minor fatty infiltration using the modified Goutallier classification. Preoperative and postoperative range of motion, strength, visual analog scale (VAS), subjective shoulder value (SSV), Patient-Reported Outcomes Measurement Information System (PROMIS) mental/physical health, American Shoulder and Elbow Surgeons Shoulder Score (ASES), and Brophy shoulder activity scores were collected. Failure defined as a symptomatic retear identified on postoperative MRI or need for revision surgery was also collected. Paired t-tests, Chi-squared, and Fisher’s exact tests were utilized for continuous and binary variables, respectively. Statistical significance was at p &lt; 0.05. Results: A total of 106 patients met the inclusion criteria with 47 partial thickness tears and 59 full thickness tears. The average age of 67 and average follow-up of 30 months (range 10-92) were included. Tear size (16.37 vs 13.62, p = 0.30), and Goutallier classification of supraspinatus (0.51 vs 0.62, p =0.41), and infraspinatus (0.42 vs 0.47, p = 0.81) did not differ between the two groups. Incidental teres minor fat infiltration was present in 53% of cases with an overall frequency in Goutallier stage as follows: 47% - Grade 0, 38% - Grade 1, 14% - Grade 2, 1% - Grade 3, and 0% - Grade 4. For partial tears, postoperative PROMIS mental and physical scores were significantly better in those without teres minor fatty infiltration versus in those without (16.7 vs 14.3, p=0.01; 15.5 vs 13.5, p=0.02), while ROM, strength, and PROs were not statistically significant. For full tears, those without fat infiltration had statistically significantly better PROs on PROMIS physical (16.25 vs 14.07, p=0.01), ASES (83 vs 63, p=0.02), Brophy (8.3 vs 5.2, p=0.02), and SSV scores (94 vs 83, p=0.046). No other differences in ROM, strength, and other PROs were identified. No differences were identified for retear and revision rates among patients regardless of fatty infiltration (partial: retear, 7.7% vs 9.5%, p = 0.59; revision, 7.7% vs 9.5%, p = 0.59; revision, 12.5% vs 5.7%, p = 0.18). Conclusions: Our study demonstrates that incidentally noted teres minor fatty infiltration occurs in over 50% of patients undergoing arthroscopic rotator cuff repair for full thickness supraspinatus tears and is associated with worse postoperative outcome scores without higher failure rates. Compared to full thickness tears, teres minor atrophy in partial thickness tears showed a lesser effect on outcome scores with only significantly worse post operative PROMIS mental and physical scores. Identification of these patients preoperatively with strategies to optimize may be necessary to improve outcomes.

Poster 283: Revision Patellofemoral Surgery: A Retrospective Cohort Analysis

Objectives: To report demographic and radiologic data, and clinical outcomes of patients undergoing revision surgery for patellar instability Methods: This is a retrospective cohort study. We included patients undergoing revision surgery for patellar instability between January 2010 and January 2022 in our institution. Exclusion criteria included patients with missing information regarding their primary surgery, patients with congenital disorders and patients with a history of distal femoral or proximal tibial osteotomy. Statistical analysis was performed using SPSS v. 20. Results: Ninety-six patients underwent revision surgery for patellofemoral instability. Eight patients were excluded based on exclusion criteria (Figure 1). Of the 88 patients included in final analysis, 44 (50%) had their primary surgery in our institution and revision rate in our institution was 3.8%. Primary surgeries included lateral retinacular release (LRR):18, medial patellofemoral ligament (MPFL) reefing: 19, MPFL reconstruction (MPFLR): 33, Tibial tubercle osteotomy (TTO): 24 (Table 1). Revision surgeries included: Lateral patellofemoral ligament reconstruction for iatrogenic medial instability: 6, MPFL release for persistent pain: 3, MPFLR: 36, MPFLR with Patellar tendon shortening: 5, MPFLR with Trochleoplasty: 4, Revision of femoral screw: 1, TTO: 19, TTO+MPFLR: 10, TTO+Trochleoplasty: 1, TTO+MPFLR+Trochleoplasty: 3 (Table 2). Patients having LRR as primary surgery had more female patients and higher patellar tilt, MPFLR patients had higher incidence of trochlear dysplasia, MPFL reefing patients were younger (Table 1). In our cohort of patients undergoing revision surgery for patellar instability, the mean tibial tubercle-trochlear groove (TT-TG) distance was 17.2 mm and the mean Caton-Deschamps Index (CDI) was 1.42. The incidences of trochlear dysplasia and skeletally immature patients were 61% and 68.2%, respectively (Table 1). The Median follow up period after revision surgery was 81 months. The overall complication rate after revision surgery was 12.5% (11/88) and occurred at a median of 31.5 months. Ten patients had recurrent patellar instability and one patient had tibial tubercle fracture (Table 3). Conclusions: The overall incidence of revision surgery was 3.8 after a primary surgery for patellar instability at a median of 31.5 months. Complications occur in 12.5% of patients after the revision surgery with the majority (10/11) being recurrent patellar instability. In our cohort, CDI and the incidences of trochlear dysplasia and skeletally immature patients were increased while the mean TT-TG distance was not.

Comparison of early and late aseptic baseplate failure in primary reverse shoulder arthroplasty with and without structural glenoid autograft

Early reverse total shoulder arthroplasty (RTSA) designs demonstrated high glenoid baseplate complication and revision rates. While contemporary designs have reduced the incidence of glenoid baseplate failures, there are reports of elevated failure risks in RTSA with glenoid bone grafting within the first 2 years. This study aims to evaluate the incidence and etiology of aseptic glenoid baseplate failure with a contemporary central screw baseplate. The null hypothesis is that majority of the baseplate failure occurs within the first 2 years and use of glenoid bone grafting does not lead to higher risk of baseplate failure. In 2014 - 2019, 753 consecutive patients who underwent primary RSA using the same inlay press-fit humeral stem and monoblock central screw baseplate were retrospectively reviewed. Fracture and septic arthropathy cases were excluded. All patients underwent preoperative radiographic and computed tomography evaluation. If there was significant glenoid erosion (Walch A2, B2, B3, C1, C2, E2, E3, and/or E4 variants), patient-specific structural glenoid bone grafting was performed. All patients underwent standardized radiographic follow-up and failure was strictly defined as any hardware breakage and/or shift in glenoid baseplate position. Failures were defined as "early" if occurring within 2 years and "late" if occurring greater than 2 years after surgery. Comparative analysis was performed to evaluate demographics, glenoid graft use, and graft union rates between the cohorts. There were 23 patients with baseplate failures (23/753, 3.0%) at mean of 23 months. Twenty-two failures (96%) occurred in patients who received structural glenoid bone grafting. Only 1 failure (0.2%) occurred when bone grafting was not indicated (p<0.001). The most common failure pattern was associated with B2 glenoid (16/23, 70%). There were 5 (22%) early failures and 18 (78%) late failures. There were no differences in any patient demographic characteristics between cohorts. All 5 early failures had graft nonunion and 4/5 occurred without trauma. In the 18 late failures , 9/18 (50%) occurred without trauma (p=0.135). Seventeen of these patients had glenoid grafting, of which 9/17 (53%) had graft nonunion. Contemporary RTSA glenoid baseplate designs have an acceptably low incidence of failure. However, the addition of structural bone graft to correct glenoid wear leads to higher aseptic baseplate failure rate. The majority of these patients suffer failure after the 2-year postoperative mark, highlighting the necessity of longer follow-up. Further analysis is necessary to quantify glenoid characteristics (severity of glenoid erosion, critical size of graft) associated with failure.

Comparative Effectiveness Systematic Review and Meta-analysis of Peripheral Nerve Repair Using Direct Repair and Connector-assisted Repair.

This clinical literature systematic review and meta-analysis were performed to assess differences in outcomes between nerves repaired with direct repair (DR) and connector-assisted repair (CAR). A systematic literature review for DR and CAR was performed. Studies from 1980 through August 2023 were included if DR or CAR repairs were performed in upper extremities with nerve gaps less than 5 mm and reported sensory Medical Research Council Classification (MRCC) outcomes or equivalent. Comparative analyses were planned for meaningful recovery (MR) rate (at both S3 and S3+ or better), postsurgical neuroma, cold intolerance, altered sensation, pain, and revision rate. There were significant differences in MR rates for CAR and DR. At the MRCC S3 threshold, 96.1% of CAR and 81.3% of DR achieved MR (P < 0.0001). At the MRCC S3+ threshold, 87.1% of CAR and 54.2% of DR achieved this higher threshold of MR (P < 0.0001). There were no differences in neuroma rate or pain scores in our dataset. Altered sensation (dysesthesia, paresthesia, hyperesthesia, or hypersensitivity) was not discussed in any CAR studies, so no analysis could be performed. The revision rate for both procedures was 0%. The proportion of patients with cold intolerance was 46.2% in the DR studies, which was significantly higher than the 10.7% of patients in the CAR group. Significantly more patients achieved sensory MR and fewer had cold intolerance when the CAR technique, instead of the DR technique, was performed to repair peripheral nerve injuries.

Evaluating Access and Outcomes in Gender-affirming Breast Augmentation: A Comparative Study of a County Hospital and an Academic Center.

Research on the diverse patient population undergoing gender-affirming breast augmentation remains scarce. We compared patients undergoing this procedure at San Francisco General Hospital (ZSFG), a county hospital, and the University of California, San Francisco (UCSF), an academic medical center. This was a retrospective cohort study of patients who underwent primary gender-affirming breast augmentation at ZSFG (August 2019 to June 2023) and UCSF (March 2015 to June 2023). Differences in sociodemographic characteristics, surgical access, and outcomes between sites were assessed. Of 195 patients, 122 patients had surgery at UCSF and 73 patients at ZSFG. ZSFG patients were more likely to be unstably housed (P < 0.001), Spanish-speaking (P = 0.001), and to have obesity (P = 0.011) and HIV (P = 0.004). Patients at ZSFG took hormones for longer before surgical consultation (P < 0.001) but had shorter referral-to-surgery intervals (P = 0.024). Patients at ZSFG more frequently underwent a subglandular approach (P = 0.003) with longer operative times (P < 0.001). Major surgical complications were uncommon (2.1%) with no differences between sites. Aesthetically, implant malposition/rotation occurred more often in patients at UCSF (P = 0.031), but revision rates were similar at both sites. Patients at UCSF had longer follow-up periods (P = 0.008). County hospital patients seeking gender-affirming breast augmentation have distinct sociodemographic profiles and more comorbidities than academic medical center patients. County patients might experience greater barriers that delay surgical eligibility, such as stable housing. Nevertheless, this procedure can be safely and effectively performed in both patient populations.

Clinical Outcomes of Total Knee Arthroplasty in Patients Who Have Hemophilic Arthropathy: A Prospective Study

BackgroundTotal knee arthroplasty (TKA) is considered the gold standard treatment for patients who have advanced hemophilic knee arthropathy. However, special considerations are required for these patients. This prospective study reports on the need for soft-tissue procedures, implant types, complication rates, mean 53.3 months implant survivorship, and patient-reported outcome measures of TKA in hemophilic patients. MethodsThere were twenty primary TKAs that were performed on 15 hemophilic patients from 2012 to 2023. The mean follow-up was 53.3 months (range, 6 to 128). The necessity for additional soft tissue procedures, implant type, complications, and revision rates were recorded. Knee Injury and Osteoarthritis Outcome Score, Knee Society Score, Hemophilia-specific Quality of Life Questionnaire for Adults, Hemophilia Activities List, and range of motion, were compared preoperatively and at the last follow-up. ResultsAt the last follow-up, implant survivorship was 90%. There were 2 revisions: one for aseptic loosening and one for periprosthetic joint infection. Additional soft tissue procedures included 2 quadriceps snips (10%). Tibial augments, tibial stubby stems, and both tibial and femoral traditional stems were used in one (5%), 4 (20%), and one (5%) TKAs, respectively. A constrained posterior-stabilized bearing was necessary in one case. Clinically and statistically significant improvements were found between the preoperative and final follow-up values of all patient-reported outcome measures, knee flexion (73 versus 108 °, P < 0.001), and flexion contracture (11 versus 4 °, P = 0.002). ConclusionsThis study showed that TKA, in patients who have hemophilic knee arthropathy, is a reliable treatment option that improves knee function and patients’ quality of life with acceptable implant survival rates at midterm follow-up (mean 53.3 months). Standard implants and approaches can be used in most cases. Despite good outcomes, hemophilic patients carry additional risks for complications that require specific considerations. It is paramount for these patients to be treated in specialized centers by experienced surgeons to achieve good results.

Use of Hinged Implants for Multistage Revision Knee Arthroplasty for Severe Periprosthetic Joint Infection: Remission Rate and Outcomes After a Minimum Follow-Up of 5 Years

BackgroundIn severe periprosthetic joint infection after total knee arthroplasty (TKA), multistage procedures are indicated for ongoing signs of infection after implant removal during the spacer interval of an intended 2-stage exchange. In these cases, several additional debridement and spacer exchange surgeries may be necessary. Herein, we analyzed the complications, remission rates, and functional outcomes after multistage revision arthroplasty using hinged TKAs. MethodsPatients (n = 79) treated with multistage revision arthroplasty after chronic periprosthetic joint infection of the knee were included (2010 to 2018). During the prosthesis-free interval, a static spacer containing antibiotic-loaded bone cement was implanted. The mean number of surgeries, including implant removal and revision arthroplasty, was 3.8 (range, 3 to 8). The mean duration from implant removal to revision arthroplasty was 83 days (range, 49 to 318). Complications, remission, and mortality were analyzed after a minimum follow-up of 5 years. Outcomes were assessed based on the Knee Society Score (KSS) and the Western Ontario McMasters University Osteoarthritis Index. ResultsDuring follow-up, 24 (30.4%) patients underwent revision surgery, with a mean time to surgical revision of 99 weeks (range, 1 to 261). After follow-up, the infection-free remission rate and overall mortality were 87.3 and 11.4%, respectively. The mean KSS was 74.3 (range, 24 to 99), the KSS Function Score was 60.8 (range, 5 to 100), and the Western Ontario McMasters University Osteoarthritis Index 30.2 (range, 5 to 83). ConclusionsIn difficult-to-treat cases, multistage revision arthroplasty showed high remission rates and low mortality after a follow-up of 5 years. The overall revision rate was comparably high, accounting for early and late reinfections most of the time. In cases of implant survival, functional outcomes comparable to those of revision hinge TKA reported in the literature can be achieved. Therefore, multistage procedures with additional debridement steps should be performed in cases of ongoing infections in intended 2-stage procedures.