Capsule Repair Research Articles

Factors affecting Baker cyst volume, with emphasis on cartilage lesion degree and effusion in the young and middle-aged population

BackgroundThe principal aim of this study was to investigate the presence of factors affecting Baker’s cyst volume in young and middle-aged populations.MethodsOpen cyst excision with valve and capsule repair, as well as knee arthroscopy, were used to treat eighty-five patients. The cases were categorized in terms of age, effusion, chondral lesion degree, meniscal tear degree, and Lindgren scores. An ultrasonography (USG) device was used to calculate the cyst volume. The IBM-SPSS 22 program was used for statistical analysis and to assess the relationships between variables using Spearman’s correlation tests.ResultsThe degree of chondral lesion was moderately and positively correlated with cyst volume in the total population (correlation coefficient: 0.469; p < 0.05).The degree of the chondral lesion was moderately and positively correlated with the degree of effusion (correlation coefficient: 0.492; p < 0.005). The cyst volume was weakly and positively correlated with the degree of effusion (correlation coefficient: 0.20; the correlation was at the limits of statistical significance p = 0.07 < 0.08).ConclusionsThis study revealed that an increase in chondral lesion severity increases the amount of effusion and cyst volume.

The effects of capsular repair on quality of life after hip arthroplasty with the anterolateral approach

Background/Aim: Hip fractures, commonly observed worldwide, cause severe functional problems and pose an economic burden. This study investigated the effects of different surgical approaches of joint capsule repair on morbidity and mortality and aimed to increase the quality of life after surgery with the most proper treatment option. Methods: This prospective case-control study was conducted on 186 patients over 65 years of age admitted to our clinic from 2006 to 2012 for displaced femoral neck fracture. All patients were treated via a hemiarthroplasty. The patients (66 males, 110 females with an overall mean age of 80.43 years (70-90)) were followed up regularly. All patients were divided into two groups: Group 1 was treated with capsular repair, and Group 2 without. The groups were compared in terms of pre-and peri-operative data, demographics, concomitant diseases, post-operative complications, mortality rates, pain level, and hip scores. Hospitalization time, average surgical duration, and time from fracture to the operation were also noted. Results: We found no significant differences between the groups in terms of surgery preferences (P>0.05). The survival of patients was significantly higher, blood loss was significantly less, and perioperative mortality rates were insignificantly lower in the noncapsular repair group (p=0.005, p=0.015, and p=0.515, respectively). Conclusion: The use of capsule repair during hip hemiarthroplasty in patients over 65 years of age had no negative impact on mortality or morbidity. Surgical preference changes during hip arthroplasty procedures are essential.

Using a Modified Kirschner Wire to Pass the First Suture Under the Coracoid Base in Coracoclavicular Stabilization

The acromioclavicular (AC) joint injury is a common shoulder injury in sports medicine. Combined coracoclavicular stabilization with AC capsule repair is 1 of 2 preferred treatments in acute high-grade AC joint injury. In East-Asian populations, the surgeon prefers to pass the first suture under the coracoid base, which is difficult using only basic surgical tools. We propose using a modified K-wire to pass the first suture under the coracoid base.

Ligamentum teres reconstruction with labrum and capsule repair after posterior acetabular wall fracture: a case report.

The aim of this case study is to present arthroscopic treatment of recurrent hip instability after acute post-traumatic posterior hip dislocation with a fracture of the posterior acetabular wall. A male patient aged 35 suffered a dislocation of the right hip joint with a fracture of the posterior acetabular wall due to an accident. The fracture was stabilized during emergency surgery with a locking compression plate, and the patient was released home in a hip brace. Multiple dislocations of the hip joint followed with the implant being confirmed as stable. Decision was made to qualify the patient for a right hip arthroscopy. During the surgery, ligamentum teres was reconstructed using gracilis and semitendinous muscle grafts, followed by the labrum and joint capsule repair, where the surgery that stabilized the acetabular wall fracture had damaged them. There were no complications following the procedure. Short-term follow-up of 3 months demonstrates the patient has a stable hip, reduced pain and has returned to pre-injury activities.

Macrophage recruitment in immune-privileged lens during capsule repair, necrotic fiber removal, and fibrosis

SummaryEmerging evidence challenges the lens as an immune-privileged organ. Here, we provide a direct mechanism supporting a role of macrophages in lens capsule rupture repair. Posterior lens capsule rupture in a connexin 50 and aquaporin 0 double-knockout mouse model resulted in lens tissue extrusion into the vitreous cavity with formation of a “tail-like” tissue containing delayed regressed hyaloid vessels, fibrotic tissue and macrophages at postnatal (P) 15 days. The macrophages declined after P 30 days with M2 macrophages detected inside the lens. By P 90 days, the “tail-like” tissue completely disappeared and the posterior capsule rupture was sealed with thick fibrotic tissue. Colony-stimulating factor 1 (CSF-1) accelerated capsule repair, whereas inhibition of the CSF-1 receptor delayed the repair. Together, these results suggest that lens posterior rupture leads to the recruitment of macrophages delivered by the regression delayed hyaloid vessels. CSF-1-activated M2 macrophages mediate capsule rupture repair and development of fibrosis.

Patient outcomes after direct capsular closure following hip arthroscopy: a systematic review

Background: Management of the hip capsule after arthroscopy remains controversial, with proponents of capsule repair arguing that this minimizes instability and restores native hip biomechanics. Methods: A systematic review was conducted. PubMed and EmBase were queried for outcomes related to hip arthroscopy. Exclusion criteria included: technique guides, editorials, reviews, biomechanical studies, case reports, studies without full text available, those without patient reported outcomes, and those that focused on high-risk-patient populations. Outcomes and measures of efficacy were collected and analyzed. Results: Six studies met all inclusion criteria, with 1428 patients overall. The majority of patients were female (63%) with mean age of 34.7 yr. Patients who were included underwent capsule repair as a standard of care. At average follow-up of 34 mo, weighted hip outcome scores activities of daily living scores improved from 66.2 preoperatively to 87.4 postoperatively, hip outcome scores sport improved from 43.4 to 75.3, and modified Harris Hip Score improved from 58.7 to 81.4. There was 80% patient satisfaction postoperatively. At last follow-up, there was a 5.0% revision arthroscopy rate, with pain as the most commonly cited indication. Lysis of adhesions was the most commonly performed procedure at revision. Conclusions: Available evidence was promising in regard to the function and durability of capsule closure when utilized on a routine basis. In this situation, revisions and conversion rates to total hip arthroplasty were very low with significant improvements in patient-reported outcomes. However, our data could not definitively support the claim that routine capsule closure leads to improved outcomes compared with leaving the capsulotomy unrepaired. Level of Evidence: Level IV.

Macrophage Recruitment in Immune-Privileged Lens During Capsule Repair, Necrotic Fiber Removal and Fibrosis

Emerging evidence of the presence of immune cells challenges the concept of the lens as an immune privileged organ, however, the underlying mechanism remains elusive. Here, we provide a direct mechanism supporting a role of macrophage recruitment in immuno-privileged lens during capsule rupture repair, fiber cell removal and fibrosis. Posterior lens capsule rupture was observed in a connexin (Cx) 50 and aquaporin 0 (AQP0) double knockout (dKO) mouse model. A ruptured posterior lens capsule resulted in lens fiber tissue extrusion into the vitreous cavity, forming a disorganized “tail-like” tissue at postnatal age of 15 days (P15). This “tail-like” tissue also contained hyaloid vessels, fibrotic tissue and macrophages. The regression of the hyaloid vessel system that contains macrophages was delayed. Moreover, fiber cell debris were detected inside the macrophages, suggesting phagocytic engulfment by macrophages. Additionally, necrotic fiber cells were surrounded by macrophages in the “tail-like” lens tissue. These macrophages were reduced after P30, and phenotypically distinct M2 macrophages were detected inside the lens, which coincided with an increase in necrotic fiber cells. By P90, the “tail-like” tissue completely disappeared, and the posterior capsule rupture was healed and replaced with thick fibrotic tissue. Furthermore, administration of colony stimulating factor 1 (CSF-1) activated polarization of macrophages to M2 and accelerated capsule repair, while inhibition of the CSF-1 receptor delayed the repair process. Taken together, these results suggest that necrotic fiber cells associated with lens posterior rupture lead to the recruitment of macrophages, which are delivered by the regression delayed hyaloid vessel system. M2 macrophages activated by CSF-1 mediate capsule rupture repair, fiber cell removal and development of fibrosis.

Prognostic evaluation of hip joint function following capsule repair based on a threedimensional finite element analysis model

To construct a three-dimensional (3D) finite element mechanical model of total hip arthroplasty for comparison of biomechanical differences of the hip joint following capsule repair and postoperative rehabilitation. Six frozen specimens of hip joint posterior capsule ligament complex were collected in a bone-capsule-bone manner, and the load-strain curve and other mechanical properties of the specimens were tested using a universal material testing machine. Thin-section CT data of the pelvis and lower limbs obtained from a volunteer were imported into Mimics software to construct a 3D model of the hip joint. Digital models of the cup, femoral prosthesis and joint capsule were created in CATIA software and imported into Mimics to simulate total hip arthroplasty; the assembled data were imported into ABAQUS software. The properties of the capsule were set according to results of the mechanical test, anatomical studies, and constitutive equations, and the biomechanics of the anatomically repaired and conventionally repaired capsules were compared during hip flexion. The results of testing on the 6 capsule specimens showed a mean ultimate tensile strain of (39.21±5.23)% and a mean of ultimate tensile strength of 1.65±0.38 MPa. The stress-strain curve of the finite element model was consistent with the results of mechanical test on the specimens and the biochemical characteristics of the capsule. The stress was distributed evenly in the anatomically repaired capsule during hip flexion but not in the capsule repaired through the conventional approach; the tensile stress in the lower part of the conventionally repaired capsule reached the ultimate tensile stress measured on the capsule specimens at a 90° flexion. The finite element model allows dynamic, quantitative and visual assessment of stress distribution in the hip joint capsule, and compared with the conventional approach, anatomical repair can achieve better biomechanical properties of the capsule.

Simulating the effect of glenohumeral capsulorrhaphy on kinematics and muscle function.

This study aimed to use a predictive simulation framework to examine shoulder kinematics, muscular effort, and task performance during functional upper limb movements under simulated selective glenohumeral capsulorrhaphy. A musculoskeletal model of the torso and upper limb was adapted to include passive restraints that simulated the changes in shoulder range of motion stemming from selective glenohumeral capsulorrhaphy procedures (anteroinferior, anterosuperior, posteroinferior, posterosuperior, and total anterior, inferior, posterior, and superior). Predictive muscle-driven simulations of three functional movements (upward reach, forward reach, and head touch) were generated with each model. Shoulder kinematics (elevation, elevation plane, and axial rotation), muscle cost (i.e., muscular effort), and task performance time were compared to a baseline model to assess the impact of the capsulorrhaphy procedures. Minimal differences in shoulder kinematics and task performance times were observed, suggesting that task performance could be maintained across the capsulorrhaphy conditions. Increased muscle cost was observed under the selective capsulorrhaphy conditions, however this was dependent on the task and capsulorrhaphy condition. Larger increases in muscle cost were observed under the capsulorrhaphy conditions that incurred the greatest reductions in shoulder range of motion (i.e., total inferior, total anterior, anteroinferior, and total posterior conditions) and during tasks that required shoulder kinematics closer to end range of motion (i.e., upward reach and head touch). The elevated muscle loading observed could present a risk to joint capsule repair. Appropriate rehabilitation following glenohumeral capsulorrhaphy is required to account for the elevated demands placed on muscles, particularly when a significant range of motion loss presents.

Anatomical and tensile mechanical analysis of hip joint capsule repair in total hip replacement

To explore the tensile mechanics and anatomical characteristics of the posterior hip capsule, and provide biomechanical and anatomical evidence for capsule repair in total hip replacement. Six bone-capsule-bone specimens were obtained from posterior hip joint of fresh frozen cadavers. The maximum strain, load, elastic modulus and load strain curves of the capsule ligament complex specimens were recorded by Instron Universal Material Testing Machine. Twelve cadaveric hip specimens were dissected to the capsule. The tensile strain of normal capsule and conventionally reconstructed capsule at 90 degrees of hip flexion were documented. The suture area of the posterior capsule was divided into nine sections, and the thicknessof different sections was measured and compared. Posterior capsule of the cadavers was repaired in conventionally way and anatomical way separately and simulated rehabilitation was conducted. The effect of rehabilitation on the repaired capsule was observed. The load-strain curve of capsule ligament complex conforms to rheological and viscoelastic characteristics. The maximum tensile strain of the complex was (39.21±5.23)%, the maximum load was (142.06± 34.15) N, the tensile strength was (1.65±0.38) MPa, and the elastic modulus is (14.23±5.62) MPa. At 90 ° hip flexion, the tensile strain of repaired capsule was higher than that of normal capsule, and the difference was statistically significant (P< 0.05). Tensile strain of conventionally reconstructed capsule is:upper part (37.0±4.9)%, middle part ( 53.3±1.1)%, lower part (68.3±6.2)%, tensile strain of normal capsule is:upper part (17.0±2.6)%, middle part (24.1±1.4)%, lower part (26.0± 4.3)% . The thickness of the posterior joint capsulein different sections is statistically significant (P<0.05), and capsule at 0.5cm proximal to the femoral insertion is suitable for suture. There the average thickness of capsule is:upper part (3.48 ± 0.11) mm, middle part (2.36 ± 0.09) mm, lower part (1. 59±0.24) mm. The posterior inferior joint capsule is thinnest at (1.42± 0.02) cm proximal to the femoral insertion, and sutures should be avoided here. After simulating rehabilitation, avulsion occurred in the lower part of the posterior capsule repaired conventionally (10/12), and the anatomically repaired capsule remained intact. The lower part of conventionally repaired capsule is overstretched and tends to fail. Anatomically repaired capsule conforms to tensile mechanics and is helpful to reduce the failure rate of repair.

Portal enlargement in hip arthroscopy preserving the iliofemoral ligament: a novel access technique protecting soft tissue restraints.

Capsulotomy in different modalities has been used to provide adequate exposure to access both the central and peripheral compartment in hip arthroscopy. Even though the hip joint has inherent bony stability, soft tissue restraints may be important in patients with ligaments hyperlaxity or in some cases with diminished bony stability. Biomechanical studies and clinical outcomes have shown the relevant role of the capsule in hip stability, mainly the role of the iliofemoral ligament. Although is not very common, iatrogenic post-arthroscopy subluxation and dislocation have been reported and many surgeons are concerned about the role aggressive capsulotomy or capsulectomy in this situation, thus capsule repair has become very popular. We present a novel technique to access the hip without cutting the iliofemoral ligament. With this technique we can obtain adequate arthroscopic access to the hip joint in order to treat adequately the central compartment pathologies reducing the risk of iatrogenic post-operative hip instability.

Comparison of Pain Control Outcomes between Direct, Continuous Adductor Canal Block and Ultrasonography Guided, Continuous Femoral Nerve Block after Total Knee Arthroplasty

Background:Purpose of this study was to compare the effects of direct, continuous adductor canal block (ACB) and ultrasonography guided, continuous femoral nerve block (FNB) on postoperative pain control, strength of the knee extensor, walking ability, and related complications after primary total knee arthroplasty.Methods:Between November 2018 and February 2019, 107 patients underwent primary total knee arthroplasty under spinal anesthesia. Forty eight patients received ACB and the other 59 received FNB for postoperative pain control. After the surgery, the patients received adductor canal or femoral nerve block via a catheter. 10 mL of 0.75% ropivacaine was administered initially, followed by continuous injection of 4 mL per hour. ACB was done before capsule repair by orthopedic surgeon and FNB was performed after the surgery. Data were prospectively collected out from these 107 patients. To evaluate postoperative pain control, the numerical rating scale scores at rest and during range of motion were recorded. To evaluate quadriceps strength, motor grade by manual muscle testing was measured. Walking ability was assessed by first weight bearing day and walking distance (steps). We also evaluated analgesic consumption using morphine equivalent and recorded related complications of peripheral nerve block.Results:No significant intergroup difference was observed in the numerical rating scale scores at rest and during range of motion on postoperative days 1, 2, 3, 4, and 5. ACB group had significantly greater quadriceps strength than did the FNB group, as evaluated by manual muscle testing on postoperative days 1. However, there was no significant difference onpostoperative days 2, 3, 4, and 5. These two groups showed no differences in walking ability in terms of first weight bearing day and walking distance. No significant intergroup difference was observed in analgesic consumption.Conclusions:The groups showed no difference in postoperative pain control. ACB showed better motor grade on postoperative day one compared with femoral nerve block, but which was similar in days after postoperative day one.

The effect of posterior capsule repair in total hip arthroplasty: a systematic review and meta-analysis

BackgroundPrior studies have compared the posterior capsule repair group in primary total hip arthroplasty by posterior approach with the control group without posterior capsule repair suggesting that the posterior capsule repair group had better clinical outcomes. However, it is still a controversy which treatment is more helpful for hip diseases. The purpose of our article is to obtain the postoperative outcomes between the 2 procedures.MethodsWe performed a systematic search by browsing the MEDLINE, EMBASE, Cochrane Library. There is no restriction on the date of publication. Before we submit our manuscript, we have re-searched the literatures again, including the articles which directly compared the postoperative outcomes of the 2 procedures.ResultsA total of 8 comparative studies were included in our meta-analysis. The posterior capsule repair group showed less dislocation rate, higher HHS, and even less postoperative bleeding volume. Meanwhile, there is no significant difference in ROM between 2 groups.ConclusionIn conclusion, according to current evidences, repairing posterior capsule during primary THA may have better functional outcomes, less dislocation incidence, and less loss of blood.

Intra-abdominal Pressure Changes During Hip Arthroscopy: A Prospective Multicenter Study

To evaluate intra-abdominal pressure changes during hip arthroscopy and define its relationship with other patient related variables. A prospective multicenter study evaluating intra-abdominal pressure (IAP) in patients undergoing arthroscopic treatment of femoroacetabular impingement was performed. The IAP was measured indirectly by a bladder catheter (AbViser Autovalve Intra-abdominal pressure monitor) and documented every 30 minutes during the entire procedure. The following risk factors were analyzed: traction time, duration surgery, previous abdominal surgery, capsule repair, psoas tenotomy, and surgical approach. One hundred and five patients with symptomatic femoroacetabular impingement that underwent hip arthroscopy met the inclusion criteria. There were significant differences in the IAP between the preoperative measurement of IAP and the IAP at different time points during surgery (P<.01). The IAP increased continuously from the commencement of surgery (considered as time point from portal establishment) until the first 60 minutes. After first 60 minutes of surgery, the IAP did not increase significantly. There were no significant associations between increased IAP and the risk factors analyzed. IAP increases significantly during the first 60 minutes of hip arthroscopy; it then stabilizes for the duration of surgery before decreasing just after the completion of surgery. The highest recorded IAP was not associated with additional complications. No symptomatic intra-abdominal hypertension was documented. Finally, patient- and procedure-specific risk factors did not predict changes in IAP. Systemic monitoring of IAP during the hip arthroscopy procedure can easily and effectively be done, allowing the surgeon to early detect any significant change. Level IV, therapeutic case series.

Risk factors for dislocation after primary total hip replacement: a systematic review and meta-analysis of 125 studies involving approximately five million hip replacements.

Dislocation following total hip replacement is associated with repeated admissions to hospital and substantial costs to the health system. Factors influencing dislocation following primary total hip replacement are not well understood. We aimed to assess the association of various factors with dislocation risk following primary total hip replacement. We did a systematic review and meta-analysis of longitudinal studies reporting associations of patient-related, surgery-related, implant-related, and hospital-related factors with dislocation risk after primary total hip replacement. We searched MEDLINE, Embase, Web of Science, and the Cochrane Library for all relevant articles published up to March 8, 2019. Summary measures of association were calculated with relative risks (RRs) and 95% CIs. This study is registered on PROSPERO, number CRD42019121378. We identified 149 articles based on 125 unique studies with data on 4 633 935 primary total hip replacements and 35 264 dislocations. The incidence of dislocation ranged from 0·12% to 16·13%, with an overall pooled incidence of 2·10% (95% CI 1·83-2·38) over a weighted mean follow-up duration of 6 years. Based on the median year of data collection, a significant decline in dislocation rates was observed from 1971 to 2015. The risk of dislocation did not differ significantly between male versus female patients (RR 0·97; 95% CI 0·88-1·08), was higher in those aged 70 years and older than in those younger than 70 years (1·27; 1·02-1·57), and was lower in those from high versus low income groups (0·79; 0·74-0·85). White ethnicity (only when compared with Asian ethnicity), drug use disorder, and social deprivation were significantly associated with increased dislocation risk. The risk of dislocation was higher in patients with body-mass index (BMI) of 30 kg/m2 or higher than in those with BMI lower than 30 kg/m2 (RR 1·38; 95% CI 1·03-1·85). Medical factors and those related to surgical history that were significantly associated with increased dislocation risk included neurological disorder, psychiatric disease, comorbidity indices, previous surgery including spinal fusion, and surgical indications including avascular necrosis, rheumatoid arthritis, inflammatory arthritis, and osteonecrosis. Surgical factors such as the anterolateral, direct anterior, or lateral approach, and posterior approach with short external rotator and capsule repair were significantly associated with reduced dislocation risk. At the implant level, larger femoral head diameters, elevated acetabular liners, dual mobility cups, cemented fixations, and standard femoral neck lengths significantly reduced the risk of dislocation. Hospital-related factors such as experienced surgeons and high surgeon procedure volume significantly reduced the risk of dislocation. Dislocation following primary total hip replacement has declined over time. Surgical approaches that reduce dislocation risk can be used by clinicians during primary total hip replacement, and alternative bearings such as dual mobility can be used in individuals at high risk of dislocation. Modifiable risk factors such as high BMI and comorbidities might also be amenable to optimisation before surgery. National Institute for Health Research.

Arthroscopic Twin Tail TightRope combined with distal joint capsule repair technique for acute acromioclavicular dislocation

To investigate arthroscopic treatment for acute acromioclavicular dislocation by using Twin Tail TightRope combined with distal joint capsular repair. The clinical data of 40 patients with acromioclavicular dislocation treated between February 2016 and December 2017 were retrospectively analyzed. The patients were divided into arthroscopic group (20 cases, using arthroscopic Twin Tail TightRope combined with distal joint capsular repair for anatomical repair of stable structure of acromioclavicular joint) and control group (20 cases, treated with clavicular hook plate internal fixation) according to different surgical methods. There was no significant difference in gender, age, cause of injury, Rockwood classification, time from injury to operation, preoperative visual analogue scale (VAS) score and Constant score between the two groups ( P>0.05), which were comparable. Postoperative VAS score and Constant score were used to assess shoulder function and re-dislocation was also observed. The incisions of the two groups healed by first intention, and no early postoperative complications occurred. All patients were followed up 12-18 months (mean, 13.5 months). Postoperative X-ray films showed good anatomical reduction in both groups, but the clavicular hook had a presense in the subacromial space in control group. All patients in arthroscopic group achieved satisfactory shoulder function and returned to work after operation; there was no obvious pain, no complications such as exposure of implant after operation, and no need to remove the implant. In the control group, 4 patients had obvious subacromial impingement pain after operation, and 1 patient had re-dislocation after removal of internal fixator at 1 year after operation; the rest had no complications related to internal fixation, and the internal fixators were removed at 1.0-1.5 years after operation, without re-dislocation. The VAS score and Constant score at 3 months and 1 year after operation in both groups significantly improved when compared with those before operation, and further improved at 1 year after operation ( P<0.05). The VAS score and Constant score at 3 months and 1 year after operation in arthroscopic group were significantly better than those in control group ( P<0.05). Arthroscopic treatment for acute acromioclavicular joint dislocation by using Twin Tail TightRope combined with distal capsular repair is more effective than traditional incision surgery and can obtain more satisfactory results in patient compliance and function recovery because of minimally invasive surgery.

Effect of articular capsule repair on postoperative dislocation after primary total hip replacement by the anterolateral approach.

ObjectiveArtificial hip dislocation is one of the most serious complications following total hip replacement. This study was performed to assess articular capsule repair in primary total hip replacement with the anterolateral approach (Watson-Jones incision) and its effect on postoperative dislocation.MethodsPatients who underwent primary total hip replacement by the anterolateral approach in Tongren Hospital of Shanghai Jiao Tong University School of Medicine from June 2007 to June 2014 were retrospectively analyzed. The patients were divided into the repair and dissection groups based on the articular capsule repair status during surgery. Postoperative dislocation rates were compared between the two groups using the chi-squared test.ResultsThe repair and dissection groups comprised 137 and 248 patients, respectively. All patients were followed up for 6 months to 5 years (average, 3.75 years). The mean age, sex, disease composition, and follow-up time were not significantly different between the two groups. Early postoperative dislocation occurred in 1 hip (0.7%) in the repair group and 13 hips (5.2%) in the dissection group.ConclusionsDuring the anterolateral approach for primary total hip replacement, articular capsule repair may reduce the occurrence of early postoperative dislocation of the hip joint.

Surgical Treatment of Labral Tears: Debridement, Repair, Reconstruction.

With the rapid growth of hip arthroscopy over the past decade, new treatment paradigms as well as recognition of new disease states have sprung forth. The ability to perform complex arthroscopic procedures of the hip such as labral augmentation and reconstruction is essential for hip arthroscopists in the revision setting, with patient selection and indications for various labral treatments the key driver for improved short- and mid-term clinical outcomes. Current techniques have been developed to address disease states where the labrum is either unstable, torn, deficient, or otherwise incompetent. Many early reports focused on the description of these techniques with new literature reporting short- and mid-term outcomes. A few of these have demonstrated improved outcomes with a contemporary arthroscopy with emphasis on capsule preservation and repair. Studies have demonstrated that labral repair has improved outcomes over labral debridement, with results of labral reconstruction in a revision approaching those of labral repair. In addition, newer reports have shown significantly improved outcomes and survivorship with capsule repair and therefore should be included in every hip arthroscopy.

Efficacy of Different Posterior Capsulotomies on Dislocations in Hip Hemiarthroplasty: T-Shaped Capsulotomy versus Longitudinal Capsulotomy.

Background:Dislocation following hip hemiarthroplasty is one of the leading reasons necessitating a resurgery. Many studies suggested that the type of the surgical approach is the main cause for dislocation. However, no consensus has been reached yet regarding the type of the surgical approach. In this prospective clinical study, we aimed to compare the efficacy of two different capsulotomy techniques on dislocations, applied during hip hemiarthroplasties performed through the posterior approach.Materials and Methods:We investigated the dislocation rates in 287 patients (aged 65 and above) who underwent cemented bipolar hemiarthroplasty for displaced femoral neck fractures through the posterior capsular approach using two different capsulotomy techniques between 2009 and 2016. Patients were followed up for 12 months after hemiarthroplasty. Patients were evaluated in two groups; on whom hemiarthroplasty was performed as longitudinal (146 patients) and as T-shaped capsulotomy (141 patients).Results:Posterior dislocations occurred in seven (5%) patients who underwent hemiarthroplasty with T-shaped capsulotomy. No dislocation was observed in 146 patients who underwent hip hemiarthroplasty through posterior longitudinal capsulotomy. The difference between the two study groups was statistically significant (P < 0.007).Conclusion:Capsule integrity can be achieved through a strong capsule repair which is possible through hemiarthroplasty with longitudinal capsulotomy. Longitudinal capsulotomy is an effective technique in preventing dislocations following hip hemiarthroplasty.

Primary Stability of an Acromioclavicular Joint Repair Is Affected by the Type of Additional Reconstruction of the Acromioclavicular Capsule

Background: The synergistic effect of the acromioclavicular (AC) capsule and coracoclavicular (CC) ligaments on AC joint stability has gained recent recognition for its importance. Biomechanical and clinical studies have shown the benefit of combined reconstruction with multiple variations of surgical techniques for AC capsule augmentation. The ideal configuration remains unknown for such capsular repair aimed at achieving optimal stability with anatomic reconstruction. Hypothesis: Primary AC joint stability can be restored by AC capsule augmentation, while position of the additional suture construct is critical. It was hypothesized that techniques that reconstruct the anterior capsular structures would restore native stability against rotations and translations. Study Design: Controlled laboratory study. Methods: Thirty fresh-frozen human cadaveric shoulders were used. Each sample was tested in the native state and served as its own control. After complete capsulotomy, 1 of 5 AC capsular repair configurations was performed: anterior, superior, posterior, O-frame, and X-frame. After testing of the AC capsular repair configurations, the tests were repeated after dissection of the CC ligaments and after CC ligament reconstruction with a suture button system. AC joint stability was immediately tested after each step under rotation and horizontal translation. To accomplish this, the AC joints were anatomically positioned on a custom fixture linked to a servohydraulic testing system. A 3-dimensional optical measuring system was used to evaluate the 3-dimensional joint motion. Clavicle posterior translation in relation to the acromion, rotation around the long axis of the clavicle, and displacement of the lateral clavicle in relation to the center of rotation were measured. The torques and forces required to rotate and translate the clavicle were recorded. Results: In terms of translational testing, after the complete capsulotomy, a significant reduction of resistance force was found across all groups, with a mean 13% to 20% remaining (P < .05). All AC suture augmentations were able to significantly increase the average resistance force as compared with the native (P = .01) against posterior translation. Subsequent cutting of the CC ligaments did not result in a significant change in any of the groups (P = .23). The synergistic effect of AC capsule augmentation and CC ligament reconstruction could be demonstrated without exception. In terms of rotational testing, the complete capsulotomy resulted in a significant reduction of resistance torque in all groups (P < .05), with a remaining torque ranging between 2% and 11% across the groups. However, all AC suture constructs significantly increased the resistance torque as compared with the capsulotomy (P = .01). The subsequent cutting of the CC ligaments resulted in a significant change in 2 of the 5 groups (O-frame, P = .01; X-frame, P = .02) and an overall remaining torque reduction ranging from 3% and 42%. The combined reconstruction of the AC capsule and CC ligaments achieved the highest percentage of regained resistance torque but remained significantly weaker than the native specimen (P = .01). Conclusion: Native translational stability could be restored by the addition of AC capsule augmentation, while partial rotational instability remained. The tested constructs revealed no significant individual differences. Clinical Relevance: Combined stabilization of the AC capsule and CC ligaments demonstrated the greatest capacity to restore the native stability against translational and rotational loads, with the specific configuration of the AC capsule repair to be chosen according to the personal preferences of the surgeon.