Reverse Total Shoulder Arthroplasty Group Research Articles

Limited preoperative forward flexion does not impact outcomes between anatomic or reverse shoulder arthroplasty for primary glenohumeral arthritis

BackgroundAnatomic total shoulder arthroplasty (TSA) remains the treatment of choice for primary glenohumeral osteoarthritis with an intact rotator cuff (PGHOA). However, reverse total shoulder arthroplasty (RSA) has gained popularity as a primary procedure in selected patients who may be at risk for postoperative rotator cuff dysfunction or glenoid loosening. The purpose of this study was to compare short-term outcomes between TSA and RSA in patients with PGHOA and limited preoperative forward flexion (FF). MethodsA retrospective review was performed on a multi-institutional registry of patients to identify patients aged less than 80 years undergoing TSA or RSA for PGHOA with preoperative FF ≤ 90°. Forty-five TSAs were identified and matched by age and sex to 45 patients undergoing RSA. A subset of 22 TSAs and 24 RSAs with severely limited preoperative FF of ≤ 70° was also analyzed. Range of motion including FF, external rotation and internal rotation, strength, and patient-reported outcomes including visual analog scale pain score, Western Ontario Osteoarthritis of the Shoulder index score, Veterans RAND 12 mental score, American Shoulder and Elbow Surgeons score, and Constant-Murley score were evaluated at a minimum of 2 years postoperative. ResultsNo significant differences were observed in postoperative FF, external rotation, or strength measurements between groups. The limited FF TSA group achieved significantly improved internal rotation compared to the RSA group (L2 vs. L4, P < .002). No significant differences were observed between TSA and RSA in American Shoulder and Elbow Surgeons, visual analog scale, Constant, or Single Assessment Numeric Evaluation scores (P > .05) for both the overall comparison and subset of patients with FF of ≤ 70°. However, patients in the RSA cohort showed a significantly higher return to normal sporting activities than the TSA group. ConclusionPatients aged less than 80 years with PGHOA and limited preoperative FF achieve similar postoperative range of motion and patient-reported outcomes whether treated with TSA or RSA. Therefore, limited preoperative FF does not appear to be a major determinant of outcomes for PGHOA.

Reversing chronic pseudoparesis secondary to massive, irreparable rotator cuff tear: superior capsular reconstruction vs. reverse total shoulder arthroplasty

Recent studies have defined pseudoparesis as limited active forward elevation between 45° and 90° and maintained passive range of motion (ROM) in the setting of a massive rotator cuff tear (RCT). Although pseudoparesis can be reliably reversed with reverse total shoulder arthroplasty (RSA) or superior capsular reconstruction (SCR), the optimal treatment for this indication remains unknown. The purpose of this study was to compare the clinical outcomes of RSA to SCR in patients with pseudoparesis secondary to massive, irreparable RCT (miRCT). This was a retrospective cohort study of consecutive patients aged 40-70 years with pseudoparesis secondary to miRCT who were treated with either RSA or SCR by a single fellowship-trained shoulder surgeon from 2016 to 2021 with a minimum 12-month follow-up. Multivariate linear regression modeling was used to compare active ROM, visual analog pain scale (VAS), Subjective Shoulder Value (SSV), and American Shoulder and Elbow Surgeons Standardized Shoulder Assessment Form (ASES) score between RSA and SCR while controlling for confounding variables. Twenty-seven patients were included in the RSA cohort and 23 patients were included in the SCR cohort with similar mean follow-up times (26.2±21.1 vs. 21.9±14.7 months, respectively). The patients in the RSA group were significantly older than those in the SCR group (65.2±4.4 vs. 54.2±7.8 years, P<.001) and had more severe arthritis (1.8±0.9 vs. 1.2±0.5 Samilson-Prieto, P=.019). The pseudoparesis reversal rate among the RSA and SCR cohorts was 96.3% and 91.3%, respectively. On univariate analysis, the RSA cohort demonstrated significantly greater mean improvement in active FF (89° ±26° vs. 73°±30° change, P=.048), greater postoperative SSV (91±8% vs. 69±25%, P<.001), lower postoperative VAS pain scores (0.6±1.2 vs. 2.2±2.9, P=.020), and less postoperative internal rotation (IR; 4.6°±1.6° vs. 6.9°±1.8°, P=.004) compared with SCR. On multivariate analysis controlling for age and osteoarthritis, RSA remained a significant predictor of greater SSV (β=21.5, P=.021) and lower VAS scores (β=-1.4, P=.037), whereas SCR was predictive of greater IR ROM (β=3.0, P=.043). Although both RSA and SCR effectively reverse pseudoparesis, patients with RSA have higher SSV and lower pain scores but less IR after controlling for age and osteoarthritis. The results of this study may inform surgical decision making for patients who are suitable candidates for either procedure.

Concomitant open distal clavicle excision is associated with greater improvement in range of motion without increased risk of acromial stress fracture after reverse total shoulder arthroplasty: a retrospective cohort study.

The purpose of this study was to evaluate the effect of concomitant open distal clavicle excision (DCE) on postoperative clinical outcomes and incidence of acromial and scapular stress fractures (ASFs) in patients with symptomatic acromioclavicular joint osteoarthritis (ACJ OA) undergoing reverse total shoulder arthroplasty (RTSA). A single-surgeon retrospective cohort study was conducted including patients who underwent primary elective RTSA with or without DCE from 2015 to 2019 with a minimum 6-month follow-up period. Shoulder active range of motion (AROM) and visual analog scale (VAS) pain were recorded preoperatively and postoperatively. ASFs and other adverse events were identified using postoperative notes and/or radiographs. Characteristics and outcomes were compared between the RTSA and RTSA-DCE groups. Forty-six RTSA patients (mean age, 67.9±8.7 years; 60.9% male; mean follow-up, 24.9±16.6 months) and 70 RTSA-DCE patients (mean age, 70.2±8.9 years; 20.0% male; mean follow-up, 22.7±12.9 months) were included. There were no significant intergroup differences in rates of ASF (RTSA, 0.0% vs. RTSA-DCE, 1.4%; P=1.00), stress reactions (RTSA, 8.7% vs. RTSA-DCE, 11.4%; P=0.76), reoperation, revision, or infection (all P>0.05), or in pre-to-postoperative reduction in VAS pain (P=0.17) at latest follow-up. However, the RTSA-DCE group had greater pre-to-postoperative improvement in flexion AROM (RTSA, 43.7°±38.5° vs. RTSA-DCE, 59.5°±33.4°; P=0.03) and internal rotation (IR) AROM (P=0.02) at latest follow-up. Concomitant DCE in RTSA improves shoulder flexion and IR AROM, alleviates shoulder pain, and does not increase the risk of ASFs. Level of evidence: III.

Complication rates following reverse and anatomic shoulder replacement in treatment of glenohumeral arthritis: a 10-year Medicare review study

We sought to compare the complication rates after anatomic total shoulder arthroplasty (aTSA) and reverse shoulder arthroplasty (RSA) for primary glenohumeral arthritis in a Medicare population. Patients who underwent a shoulder arthroplasty were identified from the 5% subset of Medicare parts A/B between 2009 and 2019. Patients with less than 1-year follow-up were excluded. A total of 8846 patients with a diagnosis of glenohumeral arthritis were then subdivided into those who received aTSA (5935 patients) and RSA (2911 patients). A multivariate Cox regression analysis was then performed comparing complication rates at 3 months, 6 months, 1 year, 2 years, and 5 years. Statistically significant increased rates of instability (hazard ratio [HR] =1.46), fracture of the scapula (HR = 7.76), infections (HR=1.45), early revision (HR=1.79), and all complications (HR=1.32) were seen in the RSA group. There was no significant difference in revision rate at 5 years between the 2 groups. There was no difference in patient characteristics or comorbid conditions (smoking status, diabetes, Charlson score, etc.) or hospital characteristics (location, teaching status, public vs. private, etc.) between the 2 groups. An increased rate of early complications was observed with the use of RSA compared with aTSA for the treatment of primary glenohumeral arthritis, including instability, scapula fracture, infection, and all cause complication. No difference in revision rate between RSA and aTSA at 5 years was observed.

Characterizing moment arms of the coracobrachialis and short head of biceps in native shoulders and after reverse total shoulder arthroplasty during elevation and rotation: a modeling study.

Reverse total shoulder arthroplasty (RTSA) alters the line of action of muscles around the glenohumeral joint. The effects of these changes have been well characterized for the deltoid, but there is limited information regarding the biomechanical changes to the coracobrachialis (CBR) and short head of biceps (SHB). In this biomechanical study, we investigated the changes to the moment arms of the CBR and SHB due to RTSA using a computational model of the shoulder. The Newcastle Shoulder Model, a pre-validated upper-extremity musculoskeletal model, was used for this study. The Newcastle Shoulder Model was modified with bone geometries obtained from 3-dimensional reconstructions of 15 nondiseased shoulders, constituting the native shoulder group. The Delta XTEND prosthesis, with a glenosphere diameter of 38 mm and polyethylene thickness of 6 mm, was virtually implanted in all the models, creating the RTSA group. Moment arms were measured using the tendon excursion method, and muscle length was calculated as the distance between the muscle's origin and insertion points. These values were measured during 0°-150° of abduction, forward flexion, scapular-plane elevation, and -90° to 60° of external rotation-internal rotation with the arm at 20° and 90° of abduction. Statistical comparisons between the native and RTSA groups were analyzed using 1-dimensional statistical parametric mapping (spm1D). Forward flexion moment arms showed the greatest increase between the RTSA group (CBR, 25.3±4.7 mm; SHB, 24.7±4.5 mm) and native group (CBR, 9.6±5.2 mm; SHB, 10.2±5.2 mm). The CBR and SHB were longer in the RTSA group by maximum values of 15% and 7%, respectively. Both muscles had larger abduction moment arms in the RTSA group (CBR, 20.9±4.3 mm; SHB, 21.9±4.3 mm) compared with the native group (CBR, 19.6±6.6 mm; SHB, 20.0±5.7 mm). Abduction moment arms occurred at lower abduction angles in the RTSA group (CBR, 50°; SHB, 45°) than in the native group (CBR, 90°; SHB, 85°). In the RTSA group, both muscles had elevation moment arms until 25° of scapular-plane elevation motion, whereas in the native group, the muscles only had depression moment arms. Both muscles had small rotational moment arms that were significantly different between RTSA and native shoulders during different ranges of motion. Significant increases in elevation moment arms for the CBR and SHB were observed in RTSA shoulders; these increases were most pronounced during abduction and forward elevation motions. RTSA also increased the lengths of these muscles.

Analysis of 90-day complications in outpatient total shoulder arthroplasty

BackgroundThere are limited data documenting the safety and clinical outcomes following outpatient total shoulder arthroplasty (TSA) and reverse TSA (RTSA) compared to inpatient shoulder arthroplasty. It was hypothesized that there would be no significant differences in complication and emergency room (ER) visit rate between outpatient TSA and RTSA. MethodsA prospectively maintained institutional registry was retrospectively queried for all patients undergoing primary TSA or RTSA between September 2016 and April 2019 and confirmed as having undergone outpatient surgery, defined as surgery performed at an ambulatory surgery center. Ninety-day complications, readmissions, and ER visits were analyzed for outpatient TSA and RTSA. The 90-day complications included infection, thromboembolic disease (pulmonary embolism, deep venous thrombosis), neurovascular injury, revision surgery, and inflammatory processes. ResultsA total of 140 patients were identified who underwent outpatient TSA or RTSA from 2016 to 2019. Four complications (3.7%) were reported in the TSA cohort, compared to 4 complications (12.9%) reported in the RTSA cohort (P = .060). Three ER visits occurred in the RTSA group compared to 0 in the TSA group (P = .001). Patients who experienced a complication had significantly higher body mass index (TSA: P = .049, RTSA: P = .035). In addition, there were no readmissions or reoperations in either TSA or RTSA patients. ConclusionOverall, the rate of complications, ER visits, and readmission rates in outpatient TSA and RTSA was found to be relatively low given the sample size of this study and minor complications reported. In addition, there were no readmissions or reoperations in either TSA or RTSA patients. Elevated body mass index may significantly increase the risk of complications after both a TSA and RTSA. This study suggests that outpatient TSA and RTSA are safe in selected patients.

Mid-term comparative study between the glenoid and humerus lateralization designs for reverse total shoulder arthroplasty: which lateralization design is better?

IntroductionThe complications of the conventional medialized design for reverse total shoulder arthroplasty (RSA) are increased scapular notching, and decreased external rotation and deltoid wrapping. Currently, lateralization design RSA, which avoid scapular notching and improve impingement-free range of motion, is commonly used. Especially, humeral lateralization design was most commonly used and glenoid lateralization design was preferred for glenoid abnormities. We compared mid-term clinical and radiologic outcomes of glenoid and humeral lateralization RSA in an Asian population in this study.Materials and MethodsWe enrolled 124 shoulders of 122 consecutive patients (mean age 73.8 ± 6.8 years) who received glenoid or humeral lateralization RSA from May, 2012 to March, 2019. We divided these patients into two groups according to RSA using either glenoid or humeral lateralization design. These different designs were introduced consecutively in Korea. The clinical and radiological results of 60 glenoid lateralization RSA (Group I, 60 patients) and 64 humeral lateralization RSA (Group II, 62 patients) were retrospectively evaluated and also were compared between the two groups. All patients were followed for mean 3 years.ResultsThe clinical and radiologic outcomes of the two groups did not differ significantly, including scapular notching (p = 0.134). However, humeral lateralization RSA showed a larger glenoid-tuberosity (GT) distance (p = 0.000) and less distalization shoulder angle (DSA) (p = 0.035). The complication rate did not differ significantly either. But, revision surgery was performed for 2 humeral loosening in the Group II.ConclusionThe clinical and radiologic outcomes of the two groups did not differ significantly, including scapular notching at mid-term follow-up. However, humeral lateralization design showed larger GT distance and less DSA. Humeral lateralization design RSA could preserve the normal shoulder contour due to a larger GT distance (more lateralization) and provide less deltoid tension due to less DSA (less distalization of COR).

Is arthroplasty necessary for three and four-part proximal humerus fractures in elderly?

Background/Aim: Proximal humerus fractures are common in elderly patients. Treatment of three and four-part fractures is especially controversial in these patients. In recent years, surgical options have been widely used, especially among shoulder surgeons. The purpose of this study was to compare clinical results of conservative and arthroplasty methods. Methods: Between 2016 and 2020, 30 patients who were treated for Neer type 3 and type 4 proximal humeral fractures were included in the study. Patient data were evaluated retrospectively and then divided into three groups. Group 1 was treated conservatively, group 2 underwent hemiarthroplasty; and group 3 underwent reverse total shoulder arthroplasty. CONSTANT and visual analog scale (VAS) scores and radiological results at six months were evaluated retrospectively from patient records. At the last control they have been evaluated with CONSTANT, University of California/Los Angeles. (UCLA), and VAS scores. Results: Twenty-three (76.7%) of the patients included in the study were females. The mean age was 73.5 (5.7) years. The mean follow-up period was 33 (2.5) months. The mean follow-up periods in groups 1–3 were 33.3 (2.9), 32.8 (2), and 32.2 (2.9) months, respectively. When the CONSTANT scores of the patients were compared at the sixth month, they were observed to be better in the reverse total shoulder arthroplasty group (P = 0.001). Final control CONSTANT scores in the hemiarthroplasty group were lower than in the other groups (P = 0.001) and similar in the reverse shoulder prosthesis and conservative treatment group (P = 1). When the UCLA scores of all groups were compared, the mean UCLA scores were found to be significantly higher in groups 1 and 3 compared to group 2 (P = 0.001). When the VAS scores of the patients were compared, a significant difference between all groups was detected (P &lt; 0.05). The highest VAS scores were observed in group 2, the second highest in group 1, and the lowest in group 3. Conclusion: For treatment of proximal humerus fractures in the elderly, patients should be evaluated according to activity levels and expectations, and surgical treatment should be suggested rather than ordered.

Drivers of inpatient hospitalization costs, joint-specific patient-reported outcomes, and health-related quality of life in shoulder arthroplasty for cuff tear arthropathy

Cuff tear arthropathy (CTA) can be successfully treated with various types of shoulder arthroplasty. While reverse total shoulder arthroplasty (RSA) is commonly used to treat CTA, CTA hemiarthroplasty (CTA-H, hemiarthroplasty with an extended humeral articular surface) can also be effective in patients with preserved glenohumeral elevation and an intact coracoacromial (CA) arch. As the value of arthroplasty is being increasingly scrutinized, cost containment has become a priority. The objective of this study was to assess hospitalization costs and improvements in joint-specific measures and health-related quality of life for these two types of shoulder arthroplasty in the management of CTA. Seventy-two patients (39 CTA-H and 33 RSA) were treated during the study time period using different selection criteria for each of the two procedures: CTA-H was selected in patients with retained active elevation, an intact CA arch, and an intact subscapularis, while RSA was selected in patients with pseudoparalysis or glenohumeral instability. The Simple Shoulder Test (SST) was used as a joint-specific patient-reported outcome measure. Improvement in quality-adjusted life years was measured using the Short Form 36. Costs associated with inpatient care were collected from hospital financial records. Univariate and multivariate analyses focused on determining predictors of hospitalization costs and improvements in patient-reported outcomes. Significant improvements in SST and Short Form 36 physical component scores were seen in both groups. Inpatient hospitalization costs were significantly higher in the RSA group than that in the CTA-H group ($15,074±$1614 vs. $10,389±$1948, P<.001), driven primarily by supplies including the cost of the prosthesis ($9005±$2521 vs. $4715±$2091, P<.001). The diagnosis of diabetes was an independent predictor of higher inpatient hospitalization costs for both groups. There were no independent predictors for quality-adjusted life year improvements. SST improvement in the CTA-H group was significantly higher in patients with lower preoperative SST scores. Using a standard algorithm of CTA-H for shoulders with retained active elevation and an intact CA arch and RSA for poor active elevation or glenohumeral instability, both procedures led to significant improvements in health-related quality of life and joint-specific measures. Costs were significantly lower for patients meeting the selection criteria for CTA-H. Further value analytics are needed to compare the relative cost effectiveness of RSA and CTA-H for patients with CTA having retained active elevation, intact CA arch, and intact subscapularis.

Cemented vs. uncemented reverse total shoulder arthroplasty for the primary treatment of proximal humerus fractures in the elderly—a retrospective case–control study

BackgroundUncemented reverse total shoulder arthroplasty (RTSA) for the primary treatment of proximal humerus fractures (PHF) in elderly patients was introduced at our institution in 2017. Recent reports have raised concerns about increased rates of early bone resorption at the proximal humerus with uncemented fracture stems. The aim of this study was to find out whether there was any difference in functional or radiographic outcomes between cemented and uncemented RTSA for PHF.MethodsSeventeen consecutive patients who underwent uncemented RTSA (group nC) in 2017 and 2018 were age and sex matched (propensity score matching 1:2) to 34 patients with cemented RTSA implanted between 2011 and 2016 (group C) for the primary treatment of PHF. These two groups were compared in terms of clinical and radiographic outcomes at 2 years after the index surgery.ResultsThe mean bone quality was low in both groups: in group nC the deltoid tuberosity index (DTI) was 1.43 (1.22–1.72) and in group C 1.42 (1.22–1.67). At the final 2 year follow-up, the relative CS was 98.3% (71–118) in group nC and 97.9% (36–125) in group C (p = 0.927); the absolute CS was 70.2 (49–89) in group nC and 68.0 (30–94) in group C (p = 0.509). Lucent lines at the humeral site were seen in 8 cases (47%) in group nC and in 13 cases (38%) in group C (p = 0.056). Compared to 3% in group C, all patients in group nC showed at least grade 1 and 65% showed grade 3 bone resorption at the proximal humerus (p < 0.001).ConclusionCompared to cemented RTSA bone resorption at the proximal humerus was significantly more frequent in patients with uncemented RTSA for PHF. So far, this is rather a radiographic than a clinical finding, because both groups showed very satisfying functional outcomes and low revision rates at the 2 year follow-up.Level of Evidence III.A retrospective case–control study.

Reverse Total Shoulder Arthroplasty Demonstrates Better Outcomes Than Angular Stable Plate in the Treatment of Three-part and Four-part Proximal Humerus Fractures in Patients Older Than 70 Years.

Reverse Total Shoulder Arthroplasty Demonstrates Better Outcomes Than Angular Stable Plate in the Treatment of Three-part and Four-part Proximal Humerus Fractures in Patients Older Than 70 Years.

A cost-effectiveness analysis of reverse total shoulder arthroplasty compared with locking plates in the management of displaced proximal humerus fractures in the elderly: the DelPhi trial.

To evaluate the cost-effectiveness of surgical treatment with reverse total shoulder arthroplasty (RTSA) compared with open reduction and internal fixation (ORIF) with a locking plate for patients 65-85 years old with a displaced proximal humerus fracture. A cost-utility analysis was conducted alongside a multicenter randomized controlled trial, taking a health care perspective. A total of 124 patients with displaced proximal humerus fractures were randomized to treatment with RTSA (n=64) or ORIF (n=60) during a 2-year period. The outcome measure was quality-adjusted life years derived from the generic questionnaire 15D in an intention to treat population. The results were expressed as incremental cost-effectiveness ratios, and a probabilistic sensitivity analysis was performed to account for uncertainty in the analysis. At 2 years, 104 patients were eligible for analyses. The mean quality-adjusted life year was 1.24 (95% confidence interval: 1.21-1.28) in the RTSA group and 1.26 (95% confidence interval: 1.22-1.30) in the ORIF group. The mean cost in the RTSA group (€36.755 [€17,654-€55,855]) was higher than that in the ORIF group (€31.953 [€16,226-€47,279]). Using incremental cost-effectiveness ratio, ORIF was the dominant treatment. When using a probabilistic sensitivity analysis with 1000 replications, the plots were centered around origo. This indicates that there is no significant difference in cost or effect. In the cost-utility analysis of treatment of displaced proximal humeral fractures, there were no differences between RTSA and ORIF.

Does reverse total shoulder arthroplasty with allograft-prosthesis composite (APC) have surgical benefits over hemiarthroplasty with APC in patients with tumors of the proximal humerus?

The research on surgical outcomes of hemiarthroplasty and reverse total shoulder arthroplasty using allograft-prosthesis composites for the proximal humeral oncologic condition is still scarce. Therefore, this study aimed to compare surgical outcomes of shoulder joint reconstruction with hemiarthroplasty and reverse total shoulder arthroplasty using allograft-prosthesis composites for tumors of the proximal humerus. Eleven patients underwent hemiarthroplasty or reverse total shoulder arthroplasty using allograft-prosthesis composites for tumors of the proximal humerus between July 2011 and April 2018 were reviewed. Radiographic analysis for bone union of allograft-host bone junction, implant loosening, stress shielding and shoulder dislocation or subluxation was performed. Functional outcomes were evaluated using visual analog scales for pain, range of motion, Simple Shoulder Test score and Musculoskeletal Tumor Society score. Furthermore, oncologic outcome and complications were also assessed, respectively. There were five patients with hemiarthroplasty (mean age, 23.2years) and six patients with reverse total shoulder arthroplasty (mean age, 46.8years, P=0.05). Radiographically, there were no events associated with implant loosening, stress shielding and shoulder dislocation or subluxation in the two groups. There were no differences in functional outcomes between the two groups. There was no local recurrence in entire cohort. In the hemiarthroplasty group, one patient was required revision surgery to reverse total shoulder arthroplasty at postoperative 6years due to rotator cuff dysfunction. In the reverse total shoulder arthroplasty group, one patient showed the fracture occurred at allograft-host bone junction at postoperative 6months. Surgical outcomes of hemiarthroplasty with allograft-prosthesis composites were not inferior to reverse total shoulder arthroplasty when applied in properly selected patients. The authors recommended that hemiarthroplasty with allograft-prosthesis composites could be used for young age patients without glenoid metastasis involvement, and reverse total shoulder arthroplasty with allograft-prosthesis composites could be used for patients with old age or metastatic bone tumors.

Antibiotic-loaded bone cement vs. plain cement as an infection prophylaxis in primary elective shoulder arthroplasty

HypothesisThe use of antibiotic-loaded bone cement (ABC) in the setting of revision arthroplasty for deep infections is a broadly accepted practice. However, its use in the setting of primary arthroplasty continues to be controversial with few studies assessing the efficacy of ABC for primary total shoulder arthroplasty (TSA). The purpose of this study was to determine whether the use of ABC in primary TSA is associated with a difference in the risk of deep infections. MethodsA retrospective cohort study was conducted using data from a United States integrated health-care system’s shoulder arthroplasty registry. Patients aged ≥18 years who underwent primary elective anatomic TSA for osteoarthritis or reverse TSA (RTSA) for rotator cuff arthropathy with implanted cement information were included in the study (2009-2020). We compared patients that received ABC to those who received plain cement and are at risk of revision due to deep infection within 5 years of follow-up using Cox proportional hazard regression weighted with the inverse propensity score, stratified by procedure type. ResultsThe study sample included 6409 TSAs for osteoarthritis and 779 RTSAs for rotator cuff arthropathy performed by 198 surgeons at 58 hospitals. In the TSA group, 20% received ABC; the cumulative infection probability at 5 years of follow-up was 0.5% and 0.6% for the ABC and plain cement groups, respectively. After covariate adjustment, no significant difference in infection risk was found (hazard ratio = 0.72, 95% confidence interval = 0.43-1.21, P = .216). In the RTSA group, 19% received ABC; the cumulative infection probability at 5 years of follow-up was 2.7% and 0.9% for the ABC and plain cement groups, respectively. After covariate adjustment, no significant difference in infection risk was found between the 2 cement groups (hazard ratio = 1.47, 95% confidence interval = 0.66-3.26, P = .341). ConclusionIn this study of more than 7000 primary elective shoulder arthroplasties performed in patients with a standard risk of infection, antibiotic bone cement did not confer any risk-reduction for periprosthetic infection when compared to plain bone cement. Different at-risk pathogen profiles may develop with prolonged use of antibiotic bone cement.

Outcomes after anatomic total shoulder arthroplasty and reverse total shoulder arthroplasty in patients with long-term disability claims

BackgroundStudies have shown that patients with workers' compensation claims have worse clinical outcomes after various orthopedic procedures. This study aimed to determine the influence of disability status on 2-year clinical outcomes after reverse total shoulder arthroplasty (RTSA) and anatomic total shoulder arthroplasty (ATSA). MethodsReview of an institutional database identified patients on disability with a minimum of 2-year follow-up and compared them to a comorbidity-matched cohort of patients without disability claims. Assessments between patients included preoperative and postoperative Visual Analog Scale (VAS) pain scores, American Shoulder and Elbow Surgeons (ASES) scores, strength, range of motion (ROM), and postoperative complications. ResultsForty-eight shoulders (45 patients) were in the ATSA cohort (24 with disability, 24 without disability) and 46 shoulders (45 patients) in the RTSA cohort (23 with disability, 23 without disability). Patients in the ATSA cohort with disability claims had higher 3-month and 2-year VAS scores (4 vs. 1, P = .003; 4 vs. 1, P = .02, respectively), lower 2-year ASES scores (58 vs. 87, P = .015), and decreased forward elevation ROM and internal rotation ROM (150 vs. 170, P = .017; 60 vs. 62.5, P = .024, respectively) compared to the cohort without disability. Significant differences in baseline values also were noted between cohorts (lower preoperative ASES: 31.7 vs. 40.5, P = .033; higher VAS: 7 vs. 6, P = .03; decreased forward elevation ROM: 90 vs. 110, P = .02). Patients in the RTSA cohort with disability claims had higher 3-month and 2-year VAS (5 vs. 1, P = .02; 3 vs. 0.5, P = .04, respectively) scores than those without claims. The baseline values for the disability cohort with RTSA demonstrated lower ASES (22.1 vs. 43.6, P = .005) and higher VAS (8 vs. 4, P = .004) scores. No significant differences were noted in improvement for the ATSA or RTSA cohorts in any parameter. The ATSA with disability cohort had a higher complication rate (45% vs. 16.6%, P = .0299). No differences were noted in complication rates in the RTSA group. ConclusionPatients who have reported disability status demonstrated worse outcomes after ATSA and RTSA compared to patients without disability claims. However, there was no significant difference in the amount of change in outcomes between groups, indicating that patients on disability can still realize significant improvements after shoulder arthroplasty.

Acute versus delayed reverse total shoulder arthroplasty for proximal humeral fractures: a consecutive cohort study.

The treatment of displaced proximal humeral fractures (PHFs) remains controversial. Open reduction-internal fixation (ORIF) can be challenging, especially in elderly patients with poor bone quality, whereas hemiarthroplasty has had unpredictable outcomes. Conservative treatment may result in severe fracture sequelae with poor outcomes, requiring late reverse total shoulder arthroplasty (RTSA) in many cases. The past few years have seen a shift toward the use of RTSA for the treatment of PHFs. The aim of this study was to compare the outcomes of RTSA between patients with acute fractures and patients who underwent delayed RTSA for fracture sequelae. Our hypothesis was that the outcomes of RTSA for acute PHFs would be better than those of delayed RTSA for fracture sequelae. We followed up 36 patients with a mean age of 79.1 years who underwent primary RTSA for acute PHFs and 56 patients with a mean age of 72.1 years who underwent RTSA in delayed fashion for fracture sequelae, including failed ORIF. The minimum follow-up period was 24 months. The mean follow-up period was 39.3 months in the acute RTSA group and 56.6 months in the delayed RTSA group. Demographic data, radiographs, and surgery data were prospectively collected and analyzed. At final follow-up, range of motion and radiographic analysis findings, as well as the Subjective Shoulder Value (SSV) and Constant score (CS), were recorded. The clinical results favored the group undergoing acute RTSA for acute PHFs, with a mean SSV of 8.3 of 10 and adjusted CS of 88.9% compared with a mean SSV of 8.0 of 10 and adjusted CS of 77.6% in the group undergoing late RTSA for fracture sequelae-but without statistically significant differences between the groups. Although the acute RTSA group showed slightly better range-of-motion values, no statistically significant differences were found between the groups. No intraoperative complications occurred. The time from injury to the regaining of good pain-free function was significantly shorter in the acute RTSA group. Although there were no statistically significant differences in outcomes between early RTSA for acute PHFs and late RTSA for fracture sequelae, the time from injury to the regaining of good pain-free function was significantly shorter in the acute RTSA group. Therefore, we advocate early RTSA for acute PHFs in elderly patients to provide a quicker recovery and an early return to good predictable outcomes with a much shorter period of pain and discomfort. In cases of failed conservative treatment, malunion, or failed ORIF, salvage RTSA has the potential to provide a good outcome.

Failed prior rotator cuff repair is associated with worse clinical outcomes after reverse total shoulder arthroplasty

BackgroundThe purpose of this study is to determine the comparative risk profile and clinical outcomes for patients undergoing reverse total shoulder arthroplasty (RTSA) for cuff tear arthropathy (CTA) without failed prior rotator cuff repair (RCR) compared with RTSA for CTA with prior RCR. MethodsFrom 2006 to 2014, all patients who underwent RTSA by two surgeons after failed RCR with minimum 2-year follow-up were identified. Patients who underwent RTSA with failed prior RCR were matched in a 1:1 ratio to patients undergoing primary RTSA, while controlling for demographic factors, prosthesis design, and surgeon. Postoperative active forward elevation and active external rotation were recorded. Outcome measures included American Shoulder and Elbow Surgeons score, Visual Analog Scale (VAS), and Simple Shoulder Test. Perioperative complications and rates of secondary reoperation were noted, and comparative multivariate analysis was performed. ResultsOf 262 patients, 192 (73.3%) were available at minimum 2-year follow-up. The prior RCR group had a significantly higher complication rate (17.4%, n = 15) than the primary RTSA group (3.8%, n = 4) (P = .001), although no significant difference in periprosthetic infection (P = .469) or secondary revision rate (P = .136) was observed. At mean 36.3 ± 26.1-month follow-up, the prior RCR group had statistically worse American Shoulder and Elbow Surgeons score (P < .001), VAS (P = .001), Simple Shoulder Test (P < .001), and active forward elevation (P = .006). Patients with multiple failed RCR attempts (n = 38) before RTSA demonstrated no significant differences versus isolated failed RCR (n = 48; P > .05). ConclusionThis study demonstrated that patients with RTSA after prior failed RCR have significantly worse patient-reported outcomes and greater rate of perioperative complications than patients undergoing primary RTSA for CTA.

Preoperative risk factors for lower physical therapy compliance rates after shoulder arthroplasty

BackgroundParticipation in postoperative rehabilitation is thought to be an important step in achieving a good outcome after total shoulder arthroplasty. The effects of common preoperative risk factors on physical therapy compliance are not well defined. This study compared physical therapy compliance rates in patients with and without a history of smoking, mood disorders, and preoperative opioid pain medication use. MethodsA retrospective chart review of primary anatomic total shoulder arthroplasty (TSA) and reverse total shoulder arthroplasty (RTSA) completed at a single institution from 2010 to 2015 was carried out. Postoperative physical therapy was conducted using a standardized 12-week shoulder arthroplasty program. Preoperative risk factors captured in the electronic medical record were a history of mood disorder, chronic preoperative opioid use, and tobacco use. Compliance rates in the 90-day global period after surgery were calculated by identifying attendance at physical therapy appointments. Compliance rates were then compared by the presence or absence of these risk factors. Two-tailed t-tests and analysis of variance were used to determine the significance of any differences in compliance between groups. ResultsA total of 214 shoulder arthroplasties (92 RTSAs, 122 TSAs) performed by a single surgeon were identified. In the global period after surgery, 82% of all physical therapy visits were attended. There were no statistically significant differences between groups regarding laterality. The overall compliance rates for the RTSA and TSA groups were similar at 83% and 82%, respectively, (P = .66). Patients with a history of mood disorder had a significantly lower compliance rate (76%) than those without (85%, P = .004), patients with a history of smoking had significantly lower compliance rates at 79% vs. 83% (P = .05), and patients with a history of chronic preoperative opioid use showed a statistically insignificant trend toward lower compliance at 78% vs. 84% (P = .06). Forty-two patients had multiple concurrent comorbidities, with a compliance rate of 72%. Patients with multiple comorbidities were significantly less compliant than patients with a single comorbidity (82%, P = .017) or patients with no comorbidities (85% P = .001). ConclusionPatients with mood disorders and a history of tobacco use were significantly less compliant with postoperative physical therapy programs after shoulder arthroplasty. Our data also suggest that the effects of these risk factors may be additive, with patients diagnosed with multiple comorbid conditions having the lowest therapy compliance rate of any group. Patients with the identified comorbidities may benefit from preoperative counseling and management of these risk factors to achieve optimal results after shoulder arthroplasty. Level of evidenceLevel III, Retrospective Prognostic Study

Complications and Readmissions Following Reverse Total Shoulder Arthroplasty with Same-Day Discharge

Abstract Background: Recent studies have demonstrated the safety of anatomic total shoulder arthroplasty (TSA) in an outpatient setting. No clinical studies to date have specifically analyzed complication and readmission rates following RTSA with same-day discharge. The purpose of this study was to compare the 90-day complication and readmission rates of patients undergoing reverse total shoulder arthroplasty (RTSA) who were discharged to home on the same day with those of patients who were admitted to the inpatient setting for at least one night. Methods: 135 consecutive patients who underwent 144 RTSA between were analyzed. Suitability for same-day discharge was determined preoperatively using standardized criteria. Operative time, 90-day readmission and complication rates, as well as ASA class and Charlson Comorbidity Index scores were recorded and compared between groups. Differences between the patients undergoing inpatient RTSA (Group 1) versus RTSA with same-day discharge (Group 2) were evaluated with student's t-test, Mann-Whitney, or Chi square as statistically appropriate, and reported as p-values. Results: Group 1 was significantly older than Group 2 when analyzed as a whole (74.3 years vs. 67.5 years, p Conclusion: RTSA with same-day discharge is a safe option for appropriately selected patients. Same-day discharge does not increase 90-day readmission and complication rates following RTSA. Level of Evidence: Level III

A kinematic and electromyographic comparison of a Grammont-style reverse arthroplasty combined with a l'Episcopo transfer compared to a lateralized humeral component reverse for restoration of active external rotation.

To assess kinematic and electromyographic findings of two designs of reverse total shoulder arthroplasty (RTSA). We tested two hypotheses: (H1) Grammont-style (RTSA) with l'Episcopo tendon transfer gains similar postoperative kinematic findings of a lateralized humeral component RTSA without a tendon transfer; (H2) RTSA with lateralized humeral component induces earlier shoulder muscle activation during shoulder motion compared with standard Grammont prosthesis with l'Episcopo transfer. Twenty-five patients with a cuff tear arthropathy, pseudoparalysis, and a positive dropping sign were sequentially included. A Grammont-style RTSA with a l'Episcopo tendon transfer was implanted in 13 patients (medialized humerus and transfer group) and an on-lay curved-stem RTSA in 12 (lateralized humerus group). Constant score; the disabilities of the arm, shoulder, and hand (DASH) score; and active shoulder range of motion (flexion, abduction, external rotation, and internal rotation) were measured pre- and postoperatively. Upper limb kinematic and surface electromyography (EMG) (anterior and posterior deltoid; upper, middle, and lower trapezius; and the upper and lower latissimus dorsi muscles) were recorded during active range of motion. At > 24months of follow-up, the Constant and DASH scores and active shoulder range of motion improved in both groups (p < 0.0001). Internal rotation was significantly higher in the lateralized humerus group than in the medialized humerus and transfer group (p = 0.004). The dropping sign was found in 0/12 patients in the lateralized humerus group and in 5/13 patients in the medialized humerus and transfer group (p < 0.001). Kinematic findings were similar between groups (p = 0.286). A pattern of earlier muscle activation in the lateralized humerus group was found as compared to the transfer group as follows: (i) posterior deltoid during external rotation (p = 0.004); (ii) upper latissimus dorsi and middle and lower trapezius during flexion (p = 0.004, p = 0.005, and p = 0.042, respectively); (iii) lower latissimus dorsi during abduction (p = 0.016). RTSA with a lateralized humeral component provided similar active external rotation restoration to a Grammont-style RTSA with a l'Episcopo procedure in patients with a dropping sign. The posterior deltoid muscle underwent earlier activation during active external rotation in the lateralized humerus RTSA group as compared to the tendon transfer group. Our findings demonstrated the H1 and only partially demonstrated the H2 of the study.