Nonoperative treatment of superior labrum anterior posterior tears: improvements in pain, function, and quality of life

Surgical management of SLAP lesions: Which technique has better surgical outcomes?

Background

The gold-standard surgical management for superior labral anterior to posterior (SLAP) lesions is unclear. This meta-analysis compares the outcomes of different surgical SLAP lesion management techniques including labral repair, long head of biceps (LHB) tenodesis and LHB tenotomy with consideration to clinical scores, return to sports, re-operation, range-of-motion and patient satisfaction.

Methods

PRISMA guidelines were adhered. Web of Science, PubMed, Cochrane Central, Science direct and EMBASE were searched using relevant keywords. Eligible studies were screened, data extracted and synthesised using Review Manager (Version 5.4.1). Bayesian network meta-analysis (NMA) was conducted. Randomised control and clinical trials regarding SLAP lesion management in patients over 18 years old were included. Studies were excluded if patients had concomitant massive tears of the rotator cuff, Bankart lesions or instability of the shoulder.

Results

Patient satisfaction with LHB tenodesis was superior to superior labral repair. No difference was demonstrated with respect to ASES score, pain VAS score, return to sports and pre-injury activities, reoperation rate or range-of-motion. LHB tenodesis and LHB tenotomy show no difference in ASES score or post operative deformity in management of SLAP lesions.

Discussion

High-quality, standardised randomised control studies between the different surgical techniques is warranted.

Return to Sport at Preinjury Level is Common After Surgical Treatment of SLAP Lesions: A Systematic Review and a Meta-analysis

BACKGROUND

Patients undergoing surgery for Superior-Labrum-anterior-to-posterior (SLAP) lesions are often worried about their return to sport performance. This systematic review determined the rate of return to sport and return to sport at the previous level (RTSP) after surgery for SLAP lesion.

MATERIALS AND METHODS

The PRISMA guidelines were followed. Meta-analysis of data through forest plot projections was conducted. Studies were divided and analyzed according to the type of interventions (isolated slap repair or SLAP repair with rotator cuff debridement and biceps tenodesis).

RESULTS

The mean overall rate of return to sport after the procedures was 90.6% and the mean overall rate of return to sport at the previous level after the procedures was 71.7%. RTSP rates of the whole population were 71% (95% CI: 60%-80%), 66% (95% CI: 49%-79%), and 78% (95% CI: 67%-87%) for isolated SLAP repair, SLAP repair with the rotator cuff debridement and biceps tenodesis, respectively. A lack of subgroup analysis for the specific performance demand or type of lesion related to the surgical technique used might induce a high risk of bias.

DISCUSSION

Return to sports at the previous level after surgically treated superior labrum anterior to posterior lesion is possible and highly frequent, with the highest rates of RTSP in patients treated with biceps tenodesis. More studies and better-designed trials are needed to enrich the evidence on indications of SLAP surgical treatment in relation to specific sports-level demand.

LEVEL OF EVIDENCE

Level-IV.

The Effect of Concomitant Biceps Tenodesis on Revision Surgery Rates After Primary Rotator Cuff Repair

INTRODUCTION

We aimed to use a national database to compare the 4-year revision surgery rates after rotator cuff repair (RCR) in patients with concomitant biceps tenodesis (BT) versus those without BT.

METHODS

A retrospective cohort analysis was conducted using the PearlDiver database from 2015 to 2017. Patients undergoing primary open and arthroscopic RCR with and without BT were identified. Demographic variables, 90-day complications, and 2- and 4-year revision surgery rates were analyzed, and a multivariable logistic regression was conducted.

RESULTS

Of the 131,155 patients undergoing RCR, 24,487 (18.7%) underwent concomitant BT and 106,668 (81.3%) did not. After controlling for comorbidities and demographics, patients with concomitant BT were associated with lower odds of all-cause revision (OR; P-value [0.77; P < 0.001]), revision BT (0.65; P < 0.001), revision RCR (0.72; P < 0.001), and shoulder arthroplasty (0.81; P = 0.001) within 4 years when compared with those without concomitant BT.

DISCUSSION

In our analysis, patients undergoing primary RCR with concomitant BT had 35% reduced odds of revision BT and 23% reduced odds of any all-cause revision within 4 years when compared with those without concomitant BT. This suggests that tenodesis at the time of primary RCR may be associated with a reduction in the utilization of ipsilateral shoulder revision surgery rates.

Rehabilitation of the painful shoulder

Managing the painful shoulder in overhead athletes can be difficult because of a lack of time-loss injuries in overhead sports and focusing primarily on either pathoanatomic causes or movement impairments. Although managing the painful shoulder can be challenging, the combination of identifying pathoanatomic causes with movement impairments can provide a more focused rehabilitation approach directed at the causes of shoulder pain. Understanding the potential influence of scapular positioning as well as mobility and/or strength impairments on shoulder pain can help clinicians develop more directed rehabilitation programs. Furthermore, sports-specific methods such as long toss or the use of weighted balls for achieving physiological or performance-based gains have limited empirical evidence regarding their clinical and performance-based benefits, which may impede the rehabilitation process. Applying a comprehensive evaluation approach prior to and throughout the treatment process can assist clinicians with selecting the most appropriate treatment based on patient need. Reconsidering traditional treatments based on existing evidence may help refine the treatment process for overhead athletes with shoulder pain.

Patient outcomes and return to play after arthroscopic rotator cuff repair in overhead athletes: a systematic review

BACKGROUND

Rotator cuff tear injuries in overhead athletes are common and may lead to chronic pain and joint disability, impairing sport participation and leading to premature retirement. The improvement of the patient reported outcome measures (PROMs) was evaluated, as were the time and level of return to sport and the rate of complication in overhead athletes who had undergone arthroscopic rotator cuff repair.

METHODS

This systematic review was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses: the 2020 PRISMA statement. In September 2022, the following databases were accessed: Pubmed, Web of Science, Google Scholar and Embase. No time constraints were used for the search. All the clinical trials investigating arthroscopic rotator cuff repair in overhead athletes were accessed.

RESULTS

Data from 20 studies were collected. The mean length of the follow-up was 40 months. All PROMs improved at last follow-up: Kerlan-Jobe Orthopaedic Clinic score (P = 0.02), visual analogue scale (P = 0.003), Constant score (P < 0.0001), University of California Los Angeles Shoulder score (P = 0.006) and American Shoulder and Elbow Surgeons' score (P < 0.0001). Elevation also improved (P = 0.004). No difference was found in external and internal rotation (P = 0.2 and P = 0.3, respectively). In total, 75.4% (522 of 692 of patients) were able to return to play within a mean of 6.4  ±  6.0 months. Of 692 patients, 433 (62.5%) were able to return to sport at pre-injury level. Fourteen out of 138 patients (10.1%) underwent a further reoperation. The overall rate of complications was 7.1% (20 of 280).

CONCLUSION

Arthroscopic reconstruction of the rotator cuff is effective in improving function of the shoulder in overhead athletes, with a rate of return to sport in 75.4% of patients within an average of 6.4 months.

LEVEL OF EVIDENCE

III, systematic review.

TRIAL REGISTRATION

Not applicable.

Trends in MR Arthrogram Utilization at a Tertiary Care Academic Center

The purpose is to evaluate the trends in MR arthrogram utilization at a tertiary care academic institution and to determine if there are factors that can be implicated in the utilization trends. Number of MR arthrograms of the shoulder, hip, and elbow from 2013-2020 at our institution were identified (n = 1882). Patient demographics including age, sex, sports participation, history of prior surgery, and physician referral were obtained. Descriptive statistics were performed to determine the prevalence of MR arthrograms. Linear regression analyses were performed to determine the relationship of time with prevalence of arthrograms. Chi-square tests and posthoc analyses with Bonferroni correction were used to assess if categorical variables were different between the years. There was overall decrease in the prevalence of MR arthrograms of the shoulder, hip, and elbow despite an increase in the overall MR volume during the study period. Linear regression models significantly predicated decrease in arthrogram prevalence with each passing year (P < 0.001). The percentage of orthopedic referrals for arthrograms in the hip (P = 0.002) and shoulder (P = < 0.001) decreased significantly towards the end of the study period. None of the other variables assessed were significant. At our tertiary care academic institution, arthrogram utilization has been drastically decreasing over the past 8 years. The percentage of orthopedic referrals for shoulder and hip arthrograms significantly decreased at the end of the study period.

Biomolecule-releasing bioadhesive for glenoid labrum repair through induced host progenitor cell responses

Glenoid labral tears occur with repetitive dislocation events and are common injuries observed in shoulder arthroscopic procedures. Although surgery can restore shoulder anatomy, repair is associated with poor clinical outcomes, which may be attributed to the poor regenerative capability of glenoid labral fibrocartilage. Thus, this study was designed to assess whether in situ tissue regeneration via biomolecule-stimulated recruitment of progenitor cells is a viable approach for the regeneration of labral tears. We developed a click chemistry-based bioadhesive to improve labral repair and reduce local inflammatory responses due to trauma. Additionally, we previously identified the presence of progenitor cells in the human labrum, which can be recruited by platelet-derived growth factor (PDGF). Thus, we hypothesized that PDGF-releasing adhesives could induce the regenerative responses of progenitor cells at the injury site to improve labral healing. In a rat glenoid labral tear model, we evaluated the effect of PDGF-releasing adhesives on promoting progenitor cells to participate in labral tear healing. After 3 and 6 weeks, the labrum was histologically analyzed for inflammatory responses, progenitor cell recruitment, proliferation, and extracellular matrix (ECM) production (collagen and glycosaminoglycan). Our results showed that adhesives alone considerably reduced local inflammatory responses and labral tissue dissolution. PDGF-releasing adhesives significantly increased progenitor cell recruitment, proliferation, and ECM production. These results demonstrate that by accelerating autologous progenitor cell responses, PDGF-releasing adhesives represent a novel clinically relevant strategy to improve the healing of glenoid labral tears.

Nonoperative Treatment of the Biceps-Labral Complex

The long head of the biceps and superior labrum should be evaluated as an interdependent functional unit. A focused patient history and physical examination including multiple provocative tests should be performed alongside advanced imaging studies to obtain an accurate diagnosis. Nonoperative treatment modalities including nonsteroidal anti-inflammatory drugs, glucocorticoid injections, and a standardized physical therapy regimen should be exhausted before operative intervention. Significant improvements in pain, functional outcomes, and quality of life are achieved in patients treated nonoperatively. Although these outcomes are less consistent for overhead athletes, return to play and performance metrics seem comparable to those who undergo surgery.

High Rate of Return to Sporting Activity Among Overhead Athletes With Subpectoral Biceps Tenodesis for Type II SLAP Tear

PURPOSE

To evaluate the functional and athletic outcomes after primary subpectoral biceps tenodesis for type II SLAP tear in overhead athletes.

METHODS

All competitive elite athletes with type II SLAP tears undergoing biceps tenodesis by a single surgeon were isolated between 2007 and 2015. Exclusion criteria were applied to individuals not involved in overhead athletics, clinical follow-up <24 months, adjacent rotator cuff or labral repair, concomitant SLAP repair, and/or previous arthroscopic shoulder surgery. Patient-reported outcome measures included visual analog scale (VAS), Kerlan Jobe Orthopaedic Clinic shoulder score, and Single Assessment Numerical Assessment. Clinical and sporting outcomes were recorded using a sports-specific questionnaire.

RESULTS

Of 22 identified patients, 16 competitive overhead athletes (72.7%; 11 men, 5 women) with a mean age of 21.0 years were available at mean 4.5-year follow-up. Baseball or softball comprised the majority of patients (n = 9; 56.3%), followed by gymnastics (n = 2), swimming (n = 2), and other sports (n = 3). At mean 4.1 months postoperatively, 13 patients (81.3%) returned to previous level of athletic activity, whereas 2 patients (12.5%) failed to return to sporting activity and 1 (6.3%) returned at a lower level of competition. VAS pain significantly decreased from an average of 4.4 preoperatively to 1.7 postoperatively (P = .002), and mean Single Assessment Numerical Assessment scores also demonstrated significant improvement (55.4-76.7; P = .008). Final mean Kerlan Jobe Orthopaedic Clinic score was 74.0 (standard deviation 25.9), including 2 patients with suboptimal outcomes due to persistent pain. There were no significant differences in mean forward flexion or rotation in either the adducted or throwing position (P > .05), although small, significant decreases in postoperative active abduction were noted (165° vs 155°; P = .003).

CONCLUSIONS

In the current series of competitive overhead athletes, 81% of patients returned to previous level of play at an average of 4.1 months postoperatively after subpectoral biceps tenodesis for symptomatic SLAP tear. Athletes reliably experienced significant decreased activity-related pain with athletic function.

LEVEL OF EVIDENCE

IV, case series.

SLAP Tears: Treatment Algorithm

SLAP lesions can be significant pain generators in the shoulder. These injuries are the most common shoulder injury in overhead athletes, as repetitive overhead motion is the most common etiology of SLAP lesions. These lesions present a diagnostic and treatment challenge to patients and physicians. Factors to consider when discussing treatment options for SLAP lesions include age, type of sports activity, level of sports participation, and degree of symptoms. Nonoperative management is the first-line treatment for most young, active patients without history of trauma, mechanical symptoms, and/or demand for overhead activities. These conservative measures include rest, avoidance of aggravating factors, injections, and physical therapy focusing on correcting scapular dyskinesis, restoring range of motion and strength, and evaluating the biomechanical throwing motion. It has been reported that 40% of professional baseball players can successfully return to play after rehabilitation alone. Alternatively, operative treatment is reserved for failure of nonoperative treatment and those with persistent symptoms that prevent individuals from participating in sports activities or activities of daily living. The two most common operative treatment options include arthroscopic repair versus biceps tenodesis. Arthroscopic repair can be considered in younger athletes (<30 years old) and elite athletes who are involved in overhead sports (baseball, tennis, volleyball) and consists of repairing the labral anchor back to the superior glenoid rim with knotless anchor repair techniques. Alternatively, biceps tenodesis is the first-line treatment option for failed SLAP repairs, and as an index procedure, traditionally has been reserved for middle-aged individuals (>30 years old), patients receiving workers' compensation, nonoverhead athletes, or in those with concomitant rotator cuff tears. However, due to a relatively high failure rate of SLAP repairs, biceps tenodesis as an index procedure is gaining more popularity, as emerging evidence suggests encouraging functional outcomes and return-to-sport rates even in younger athletes.

Longitudinal assessments of strength and dynamic balance from pre-injury baseline to 3 and 4 months after labrum repairs in collegiate athletes

BACKGROUND

There is a lack of quantitative assessments of athletes' functional strength and dynamic balance following labrum repairs.

PURPOSE

To compare the upper extremity strength and dynamic balance among pre-injury baseline and approximately 3 and 4 months after labrum surgeries in collegiate athletes to identify critical values to inform rehabilitation.

METHODS

Fifteen male and one female collegiate athletes between 18 and 22 years old were tested at pre-injury baseline (n = 14) and 2.7 (n = 16) and 3.8 months (n = 12) after labrum surgeries. Strength was assessed using the peak forces produced in a maximal push-up test. Dynamic balance was assessed using the reaching distances in a reaching test.

RESULTS

The injured side's peak forces significantly decreased from the baseline to the 3-month post-surgery and then significantly increased between the 3-month and 4-month post-surgery assessments but remained significantly less at the 4-month post-surgery compared to the baseline (p ≤ 0.024; Cohen's dz ≥ 0.75). Peak force asymmetries were greater at the 3-month and 4-month post-surgery assessments than the baseline (p ≤ 0.005; Cohen's dz ≥ 1.02).

CONCLUSION

With a relatively small sample size, the results support the use of objective functional assessments for rehabilitation and return-to-play decisions among collegiate athletes following labrum repairs.

Moderate Return to Play and Previous Performance After SLAP Repairs in Competitive Overhead Athletes: A Systematic Review

PURPOSE

To perform a systematic review of return to play (RTP) and return to previous level of performance (RPP) in competitive overhead athletes after SLAP repair to identify factors associated with failure to RTP.

METHODS

Systematic review was conducted according to PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines. Review was registered with PROSPERO International prospective register of systematic reviews (CRD42020215488). Inclusion criteria were literature reporting RTP or RPP following SLAP repair in overhead athletes were run in the following databases: PubMed/MEDLINE, Scopus, Cochrane Central Register of Controlled Trials, Cochrane Database of Systematic Reviews, and Google Scholar. Categories for data collection for each full article included (1) article information; (2) patient demographics; (3) surgical techniques; (4) level of competition; (5) rotator cuff treatment; (6) player position; (7) patient-reported outcome measures; and (8) RTP and RPP rates. The Methodological Index for Non-randomized Studies checklist was used to evaluate quality of all included studies.

RESULTS

Eight studies with 333 subjects were identified. Overall RTP and RPP rates were 50% to 83.6% and 35.3% to 64%, respectively. Patients with surgically treated rotator cuff pathology had lower RTP (12.5%-64.7%) rates compared with those without (80.0%-83.6%). Professional athletes had similar RTP rates (62.5%-81.5%) compared with high-school (75.0%-90.0%) and college athletes (12.5%-83.3%). However, professional athletes demonstrated the lowest relative range of reported RPP rates (27.7%-55.6%). Pitchers had lower RTP (62.5%-80.0%) and RPP (52.0%-58.9%) compared with position players (91.3% RTP, 76.3%-78.2% RPP).

CONCLUSIONS

Studies reviewed reported moderate RTP and RPP rates following SLAP repairs in competitive overhead athletes. Those with associated rotator cuff tear requiring treatment, and baseball pitchers were less likely to RTP and RPP. Professional athletes had similar RTP to an amateur; however, they were less likely to RPP.

LEVEL OF EVIDENCE

Level IV, systematic review of Level III-IV studies.

Is timing of superior labrum anterior to posterior (SLAP) repair important? A cohort study evaluating the effect of the duration of symptoms prior to surgery on the outcomes of patients who underwent type II SLAP repair

Background

The management of superior labrum anterior to posterior (SLAP) tears is somewhat controversial. It is unclear if the length of time between symptom onset and surgery affects SLAP repair outcomes.

Methods

Sixty-one SLAP repairs were retrospectively reviewed pre-operatively and post-operatively at 1, 6, 24 weeks, and > 2 years post-surgery. Patients were allocated to an 'early repair' or 'late repair' group based on time between symptom onset and surgery.

Results

Of the 61 patients, 22 patients had surgery within six months of symptom onset. Pre-operatively, 'late repair' patients played a higher level of sport than 'early repair' patients prior to injury. Post-operatively, both groups had similar outcomes up to six months, though at six months 'early repair' patients reported a higher level of work than 'late repair' patients (p = 0.01). At > 2 years after surgery, 'early repair' patients had reduced pain and difficulty with overhead activities (p = 0.002), less stiffness (p = 0.001) and were more satisfied than 'late repair' patients (p = 0.04).

Conclusions

Up to six months post-operatively, the time between symptom onset and surgery has limited effect on functional outcomes. However, at > 2 years after surgery, earlier repairs ( < 6 months) are interestingly associated with better functional outcomes. Further studies are required to determine if this is a causal relationship.

Return to play following nonsurgical management of superior labrum anterior-posterior tears: a systematic review

BACKGROUND

Superior labrum anterior-posterior (SLAP) tears are common shoulder injuries, especially in overhead athletes. Often, initial management of these injuries is nonsurgical with focused rehabilitation. The purpose of this review was to evaluate the outcomes of nonsurgical management of SLAP tears in athletes.

METHODS

A systematic review was performed for articles published before March 2021 using key search terms pertaining to clinical studies evaluating the nonsurgical treatment of SLAP tears in adult patients published in English-language literature. Abstracts and manuscripts were independently reviewed by 2 co-authors to determine eligibility. Return-to-play rate and return-to-prior-athletic-performance rate were determined by combining results across studies.

RESULTS

Five articles met the inclusion criteria. There were 244 total athletes (162 elite or higher-level athletes). The mean ages ranged from 20.3 to 38.0 years. Type II SLAP tears were most common; baseball, softball, and weightlifting were the most common sports involved. The return-to-play rate was 53.7% in all athletes and 52.5% in elite or higher-level athletes. In athletes who were able to complete their nonoperative rehabilitation program, the return-to-play rate was 78% in all athletes and 76.6% in elite or higher-level athletes. The overall rate of return to prior performance was 42.6%, which increased to 72% for those athletes who were able to complete their rehabilitation. Patients who discontinued the rehabilitation protocol in favor of surgery had an average of 8 physical therapy sessions compared with 20 sessions for patients with successful nonoperative treatment. The timing of return to play was generally less than 6 months in studies that reported it. Patient-reported outcomes, including the American Shoulder and Elbow Surgeons score and visual analog scale, all improved significantly after nonsurgical treatment. Factors associated with failure of nonsurgical management included older age, participation in overhead sports (especially baseball pitchers), traumatic injury, positive compression rotation test, concomitant rotator cuff injury, longer baseball career, longer symptomatic period, and the presence of a Bennett spur.

CONCLUSIONS

Overall, nonoperative treatment of SLAP tears in athletes can be successful, especially in the subset of patients who are able to complete their rehabilitation program before attempting a return to play. Although nonoperative treatment should be considered the first line of treatment for most SLAP tears, there are some factors that may be associated with failure of conservative treatment; therefore, further high level, prospective studies would be beneficial to identify those athletes most likely to respond favorably to nonoperative treatment.

Disabled Throwing Shoulder: 2021 Update: Part 2-Pathomechanics and Treatment

The purpose of this paper is to provide updated information for sports healthcare specialists regarding the disabled throwing shoulder (DTS). A panel of experts, recognized for their experience and expertise in this field, was assembled to address and provide updated information on several topics that have been identified as key areas in creating the DTS spectrum. Each panel member submitted a concise presentation on one of the topics within these areas, each of which were then edited and sent back to the group for their comments and consensus agreement in each area. Part two presents the following consensus conclusions and summary findings regarding pathomechanics and treatment, including (1) internal impingement results from a combination of scapular protraction and humeral head translation; (2) the clinically significant labral injury that represents pathoanatomy can occur at any position around the glenoid, with posterior injuries most common; (3) meticulous history and physical examination, with a thorough kinetic chain assessment, is necessary to comprehensively identify all the factors in the DTS and clinically significant labral injury; (4) surgical treatment should be carefully performed, with specific indications and techniques incorporating low profile implants posterior to the biceps that avoid capsular constraint; (5) rehabilitation should correct all kinetic chain deficits while also developing high-functioning, throwing-specific motor patterns and proper distribution of loads and forces across all joints during throwing; and (6) injury risk modification must focus on individualized athlete workload to avoid overuse. LEVEL OF EVIDENCE: V, expert opinion.

Decreased Trunk Rotation at Foot Contact in Professional Baseball Pitchers With Prior Conservatively Managed SLAP Tears: A Propensity Score-Matched Analysis

PURPOSE

To compare kinematic and kinetic parameters between a cohort of fully recovered professional pitchers with prior shoulder injury treated conservatively and a cohort with no prior shoulder injury.

METHODS

Twenty-six fully recovered professional baseball pitchers with a history of shoulder injury treated conservatively pitched 8 to 10 fastball pitches using 3-dimensional motion capture (480 Hz). All shoulder injuries occurred within a 1- to 4-year time span from biomechanical evaluation and were severe enough to prevent pitchers from playing for between 1 and 12 months. These pitchers were propensity score matched by age, height, weight, handedness, and ball velocity to pitchers with no prior injury history (control) at a ratio of 1:4. We compared 21 kinematic and 11 kinetic parameters between groups using appropriate parametric testing. Subanalysis comparisons of pitchers with prior SLAP injury as well as rotator cuff tendinitis were also performed.

RESULTS

SLAP tears (n = 11, 42.3%) were the most frequently reported injury, followed by rotator cuff tendinitis and/or shoulder impingement (n = 7, 26.9%). Compared with the control group, the 26 pitchers with prior injury showed no significant differences across the kinematic and kinetic factors. However, the SLAP tear subgroup did show significantly less trunk rotation at foot contact compared with controls (34.1° ± 4.9° vs 39.2° ± 10.2°, P = .0075).

CONCLUSIONS

Fully recovered professional baseball pitchers with shoulder injuries treated conservatively showed no significant differences in kinetics or kinematics compared with their propensity score-matched counterparts, suggesting that shoulder injury alone may not greatly alter pitching mechanics. However, whereas prior groups have shown a decrease in trunk rotation at foot contact after surgical repair for SLAP tears, our study suggests that this kinematic change may alternatively originate with the injury itself.

CLINICAL RELEVANCE

Understanding the cause of biomechanical adaptations by pitchers after injury can better aid clinicians and coaching staff in providing individualized and specific care to the throwing athlete.

Performance Metrics and Economics of SLAP Repairs in Major League Baseball Pitchers

Background

Superior labrum anterior-posterior tears (SLAP) can be a career-altering injury for Major League Baseball (MLB) pitchers. Surgery and postoperative rehabilitation keep pitchers on the injured list (IL) for extended time, which results in a significant cost to a team. To date, no analyses have focused on the financial cost of SLAP repairs in MLB pitchers.

Methods

A retrospective review of MLB pitchers with SLAP repair from 2004 to 2019 was conducted utilizing IL and financial contract data from the MLB website. Cost of injury was calculated from salary of the player. Performance metrics including earned run average, walks + hits per innings pitched, and innings pitched (IP) were averaged for one and all seasons played before and after injury. Return to play and return to prior performance rates were calculated and reported.

Results

Of the 55 players identified, 22 players (40%) returned to play and 18 of these 22 players (82%) returned to prior performance. Annual cost increased over the study period (R² = 0.288) averaging $3.5 million, and a stable average of 172 days was spent on the IL (R² = 0.001). Performance was negligible except IP (106.95 vs. 50.85; P < .01) for 1 season before and after injury. For all seasons, earned run average and walks + hits per innings pitched significantly increased (4.13 vs. 5.19; P = .030, and 1.36 vs. 1.53; P = .033, respectively), while IP downtrended without significance (P = .058).

Conclusion

SLAP repairs in MLB pitchers have significant financial impact and time spent on the IL, which surprisingly has not changed over time. It is encouraging to know return-to-play pitchers return without profound decline in performance level following SLAP repair.

Glenoid Labral Injuries Are More Common Posteriorly Than Superiorly and Are Combined Across Multiple Areas of the Glenoid

Purpose

To categorize arthroscopically observed labral injuries to include location on the glenoid and frequency of the injuries in each location.

Methods

Patients undergoing arthroscopic labral surgery between January 2018 and June 2020 were reviewed. Inclusion criteria for labral injury were consistently applied and included history, clinical examination and imaging findings, and failure of rehabilitation. Exclusion criteria included arthritis, adhesive capsulitis, and previous surgery. Injury locations were categorized into superior, anterior, and/or posterior areas on the glenoid and as isolated in one area or combined in more than one area. Injury patterns also were evaluated. Interrater and intrarater agreement was assessed between 2 raters for injury location and tear pattern for 22 randomly assigned cases.

Results

In total, 167 cases met the inclusion criteria. Injuries were found in all areas. Combined injuries were found almost twice as often as isolated injuries (63.5% vs 37.5%). Isolated posterior injuries had the greatest frequency of all specific injury types (26.3%). Isolated superior injuries (SLAP 2-4) had a frequency of 7.2%. Tear patterns included peel back, separation/split, insubstance injury, peripheral rim flattening, and extension into the posterior inferior glenohumeral ligament. Interrater was excellent for all tear locations (intraclass correlation coefficient ≥0.85) whereas intrarater agreement was good to excellent (intraclass correlation coefficient ≥0.63).

Conclusions

Labral injuries that are associated with clinical symptoms can occur as isolated or combined types in the superior, anterior, and posterior glenoid areas and can display multiple injury patterns. Combined types of injuries are almost twice as common as those that are isolated in one area. Posterior injuries, isolated or combined, are frequent but superior injuries are less common

Level of Evidence

Level IV, therapeutic case series.

The Thrower's Shoulder

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The thrower's shoulder has been a subject of great interest for many decades. Different theories have been proposed to clarify the pathophysiology, clinical presentation, and treatment options for this condition. In this review article, we summarize the relevant anatomy and pathophysiology and how these translate into signs, symptoms, and imaging findings. Also, a historical review of the treatment methodologies in the setting of an evolving concept is presented.

»

The initial event in the cascade is thickening and contracture of the posteroinferior capsule resulting from repetitive tensile forces during the deceleration phase of throwing. This is known as "the essential lesion" and is clinically perceived as glenohumeral internal rotation deficit (GIRD), and a Bennett lesion may be found on radiographs.

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Change in the glenohumeral contact point leads to a series of adaptations that are beneficial for the mechanics of throwing, specifically in achieving the so-called "slot," which will maximize throwing performance.

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The complexity of the throwing shoulder is the result of an interplay of the different elements described in the cascade, as well as other factors such as pectoralis minor tightness and scapular dyskinesis. However, it is still unclear which event is the tipping point that breaks the balance between these adaptations and triggers the shift from an asymptomatic shoulder to a painful disabled joint that can jeopardize the career of a throwing athlete. Consequences are rotator cuff impingement and tear, labral injury, and scapular dyskinesis, which are seen both clinically and radiographically.

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A thorough understanding of the pathologic cascade is paramount for professionals who care for throwing athletes. The successful treatment of this condition depends on correct identification of the point in the cascade that is disturbed. The typical injuries described in the throwing shoulder rarely occur in isolation; thus, an overlap of symptoms and clinical findings is common.

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The rationale for treatment is based on the pathophysiologic biomechanics and should involve stretching, scapular stabilization, and core and lower-body strengthening, as well as correction of throwing mechanics, integrating the entire kinetic chain. When nonoperative treatment is unsuccessful, surgical options should be tailored for the specific changes within the pathologic cascade that are causing a dysfunctional throwing shoulder.

Arthroscopic evaluation of failed primary type II SLAP lesion repair in patients with high physical activity over 40 years of age and the outcomes of tenotomy

Objectives

In this study, we aimed to examine patients over 40 years of age who underwent failed primary isolated type 2 superior labrum anterior posterior (SLAP) repair arthroscopically and to evaluate the outcomes of tenotomy.

Patients and methods

Between March 2011 and December 2019, a total of 32 patients (19 males, 13 females; median age: 55.1 years; range, 41 to 59 years) who underwent primary repair for SLAP due to high activity levels and in whom the treatment failed were retrospectively analyzed. Biceps tenotomy was applied to all patients. The Constant-Murley Score (CMS), Visual Analog Scale (VAS) pain scores, and muscle strength before and after re-arthroscopy were compared.

Results

The median follow-up time was 27 (9-84) months after biceps tenotomy. During arthroscopy, failure was detected in three (9.37%) patients and additional pathologies were detected in five (15.62%) patients. Patients with biceps tenosynovitis were 29 (90.62%). The mean pre- and postoperative CMS scores were 40.5±11.1 and 86.3±8.1, respectively (p<0.001). The mean pre- and postoperative VAS-pain scores were 7.3±1.5 and 2.1±0.8, respectively (p<0.001).

Conclusion

Although the primary repair technique has been successfully performed in patients with SLAP lesions over 40 years of age and high physical activity, the clinical outcomes are unsatisfactory. Biceps tenotomy improves functional and clinical results in patients with SLAP lesions who do not benefit from primary repair.

Imaging of Patients Suspected of SLAP Tear: A Cost-Effectiveness Study

Background: Superior labral anterior-to-posterior (SLAP) tears are a common shoulder pathology. While MRI is the imaging gold standard for diagnosis of this pathology, the cost-effectiveness of the common MRI strategies is unclear. Objective: The primary objective of our study was to determine the cost-effectiveness of the common MRI-based strategies used for the diagnosis of SLAP tears. Methods: We created decision analytic models from the U.S. health care system perspective over a two-year time horizon for a hypothetical patient population of 25-year-olds with a previous diagnosis of SLAP tear. We used the decision models to compare the differences in incremental cost-effectiveness of the common MRI strategies and resulting treatment applied for this patient type, which included combinations of 1.5T and 3T imaging and unenhanced MRI and MR arthrogram protocols. Input data on cost, probability, and utility estimates were obtained through a comprehensive literature search. The primary effectiveness outcome was quality-adjusted life years (QALY). Costs were estimated in 2017 U.S. dollars. Results: When all imaging strategies were considered, the unenhanced 3T MRI based imaging strategy was the preferred and dominant option over 3T MR arthrography (MRA) and 1.5T imaging (MRI/MRA). When the model was run without 3T imaging as an option, 1.5T MRA was the favored option. Probabilistic sensitivity analyses confirmed the same preferred imaging strategy results. Conclusion: An unenhanced 3T MRI based strategy is the most cost-effective imaging option for patients with suspected SLAP tear. When 3T imaging is not available, 1.5T MRA is more cost-effective than 1.5T imaging. The main driver of these results is the fact that 3T MRI and 1.5T MRA are the most specific tests in these respective scenarios which results in fewer false positives and prevents unnecessary surgeries leading to decreased costs. Clinical Impact: Our cost-effectiveness model findings complement prior diagnostic accuracy work, helping produce a more comprehensive approach to define imaging utility for the SLAP patient population for radiologists, clinicians, and patients who have access to various types of MRI options.

Repair versus biceps tenodesis for the slap tears: A systematic review

PURPOSE

The ideal treatment algorithm is still controversial for Superior Labral Anterior-Posterior (SLAP) tears. In this systematic review, we aimed to clarify and ascertain which treatment modality is effective and more usable in which conditions.

METHODS

In this systematic review, we used the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) guidelines established for systematic reviews and meta-analysis. "SLAP or Superior Labral Anterior-Posterior" and "biceps tenodesis" search terms were used in The Cochrane Library database and Pubmed from their inception to the 30th of September 2020. A total of 2326 titles were screened and 2069 articles were removed because of their ineligibility. Full texts of 14 studies were screened and finally, six were suitable for the present systematic review. Demographic details and study characteristics, patient satisfaction, functional outcomes, return to preinjury sports level, reoperation, stiffness, sling time and rehabilitation protocols were reviewed and compared between SLAP repair and biceps tenodesis groups.

RESULTS

A total of 2326 titles were screened and six studies were detected eligible. Results of 287 patients (SLAP repair: 160, Biceps Tenodesis: 127) were reviewed in included six studies. Biceps tenodesis was showed as more satisfied technique in four of the studies but the statistical comparing results of two groups were not significantly different in each study. Different functional scoring systems used in the studies were not statistically significantly different between the groups. The percentage of return to sport and preinjury level is higher in biceps tenodesis in the five studies. The total reoperation rate for SLAP repair was 19/160 (12%) and biceps tenodesis was 7/127 (6%).

CONCLUSION

The biceps tenodesis has a higher return to preinjury sports level, higher patient satisfaction and lower reoperation rates but functional scores are similar between SLAP repair groups in patients with SLAP tear.

Surgical Management of Superior Labral Tears in Athletes: Focus on Biceps Tenodesis

Superior labrum anterior-posterior (SLAP) lesions are common in overhead athletes. Though some patients have asymptomatic lesions, many tears cause pain and diminished athletic performance. Accurate diagnosis of SLAP lesions can be challenging as the sensitivity and specificity of both the physical exam and advanced imaging is questionable. Management is also difficult, as treatment can be life-altering or career-ending for many athletes. If first-line nonoperative treatment fails, surgical options may be considered. The optimal surgical management of SLAP lesions in athletes is debated. Historically, return to play (RTP) rates among athletes who have undergone arthroscopic SLAP repair have been unsatisfactory, prompting clinicians to seek alternate surgical options. Biceps tenodesis (BT) has been postulated to eliminate biceps tendon-related pain in the shoulder and is increasingly used as a primary procedure for SLAP lesions. The purpose of this text is to review the current literature on the surgical management of SLAP lesions in athletes with an emphasis on the role of BT.

Double bucket handle tear of the superior labrum in a young patient presented with shoulder instability treated with arthroscopic debridement: A case report

INTRODUCTION AND IMPORTANCE

The two major etiologies of shoulder superior labral tears anterior to posterior (SLAP) are traumatic and degenerative processes. Bucket handle tears of the superior labrum represent one-third of labral lesions. However, in this article, we present a double bucket handle tear which has been reported once in the literature.

PRESENTATION OF CASE

A 25-year-old male presented with complaint of chronic pain in his right shoulder with a remote history of traumatic dislocation. Physical examination revealed a positive apprehension test. Shoulder magnetic resonance imaging (MRI) showed a superior labral tear with a Hill-Sach lesion. Arthroscopy showed a double bucket handle tear of superior labrum and mild biceps tendonitis along with Bankart lesion. The tear was resected and the Bankart lesion was repaired followed by supervised physical therapy. Good clinical outcomes in form of resolution of pain and shoulder instability at six months were obtained.

DISCUSSION

SLAP tears are common shoulder lesion that is reported differently in the literature. Arthroscopic studies had reported the incidence between 3.9%-11.8. The diagnosis of such lesion relies on the clinical presentation and imaging. Knesek et al. classified SLAP lesions based on the integrity of the biceps anchor and the type of labral tear (Knesek et al., 2013). The standard treatment of symptomatic SLAP lesions is Arthroscopic debridement. However, non-operative management was described in the literature.

CONCLUSION

Double bucket handle injuries of the superior labrum are reported in literature once. These lesions can be treated with arthroscopic debridement and Bankart repair and followed by supervised physical therapy.

Evolving Concepts in the Management of Shoulder Instability

BACKGROUND

Shoulder instability exists on a spectrum ranging from subtle subluxation and pain to dislocation and can be the result of a traumatic event or repetitive microtrauma. Shoulder instability can result in significant disability and often requires surgical intervention, especially amongst younger, active patient populations. The optimal treatment of shoulder instability depends on the degree of instability and concomitant pathology involving the labrum, capsule, and bony anatomy of the glenoid and humeral head. Even with surgical intervention, recurrent instability remains a relatively common and difficult problem to address.

PURPOSE

With a focus on anterior instability, the purpose of this review article is to discuss the current assessment and treatment of shoulder instability, and highlight current and future treatment modalities, as well as to identify current trends and deficiencies in our current management. We also provide an algorithm for the surgical treatment of anterior shoulder instability.

METHODS

Literature databases were extensively searched for recent articles related to the mechanism, diagnosis, and treatment of shoulder instability to comprise a comprehensive review.

CONCLUSION

Although there are multiple treatment modalities available for shoulder instability, such as nonoperative management, open and arthroscopic Bankart repair, Latarjet procedures, and remplissage, orthopaedic surgeons continue to learn about the most appropriate method of management as increasing long-term outcomes become available.

Reported Technical Aspects of Type II SLAP Lesion Repairs in Athletes

Purpose

To systematically review the available literature to further describe and report the available data on SLAP repair techniques and the association with outcomes.

Methods

A systematic review of literature was performed on manuscripts describing type II SLAP repairs in athletes. Selection criteria included studies reporting exclusively type II SLAP tears without concomitant pathology, minimum 2-year postoperative follow-up, use of anchor fixation, and return to previous level of play data available. We extracted patient outcome as well as surgical construct details from each article. Average outcomes and return to play rates were calculated and substratified further by athlete type. Return to play rates were compared by repair constructs with the Student t test.

Results

Initial search resulted in 107 articles. After exclusion criteria were applied, 17 articles were included in the final analysis. Overall, 84% of patients had good-to-excellent results. Of all athletes, 66% returned to previous level of play. There was significant variation in reported technique in terms of anchor number, location, material, suture type, and knotless versus knotted constructs. No significant difference was reported in outcomes in comparison of suture type (P-value .96) or knotted versus knotless constructs (P-value .91). Given the significant variability in reporting, no statistical analysis was felt able to be performed on anchor location and number.

Conclusions

Repair of type II SLAP tears in athletes is a difficult problem to treat with overall low return to play despite a high rate of “good” outcomes when assessed by outcome measures. Significant variability exists in surgical technique, as well as reporting of surgical technique, potentially limiting the ability to define the best or most effective technique for SLAP repair.

Level of Evidence

IV, systematic review of level III and level IV studies.

There is a correlation between histopathological findings of joint capsule and synovium, and postoperative clinical outcomes and treatment in patients with isolated type II superior labrum anterior posterior lesions

Objectives

This study aims to histologically examine the joint capsule and synovium to determine the correlation between histopathological findings and postoperative clinical outcomes in patients with isolated type II superior labrum anterior posterior (SLAP) lesions.

Patients and methods

Thirty-eight patients (24 males, 14 females; mean age 53.2±6.6 years; range, 45 to 67 years) who underwent arthroscopic treatment of type II SLAP lesions between June 2017 and September 2018 were evaluated prospectively. Visual analog scale (VAS), Simple Shoulder Test (SST), and American Shoulder and Elbow Surgeons (ASES) scores of all patients were recorded preoperatively, and at 6th and 12th months postoperatively. Biceps tenotomy was applied as arthroscopic surgical treatment in all patients. Biopsy materials obtained from rotator interval joint capsule and synovium during the arthroscopy were evaluated histopathologically. The density of the vessels in the specimens was defined as low, medium, and high by the pathologist. The patients with medium or low vessel density in specimens were group 1 (n=14) and those with high vessel density group 2 (n=24).

Results

In group 2, preoperative VAS score was significantly higher. There was no difference between the scores of the groups except for the sixth month SST score which was significantly higher in group 1. Histopathological evaluation revealed that the number of lymphocytes, fibroblasts, mast cells, myofibroblast, synovial lining cells, macrophages, and amount of collagen in connective tissue were significantly higher in group 2. In five patients of group 2, the rehabilitation program was interrupted due to pain and difficulty in gaining a range of motion during the first four weeks postoperatively. Four of these patients recovered with medication and long-duration physiotherapy. Shoulder stiffness developed in one patient who required arthroscopic release and further rehabilitation.

Conclusion

There is a correlation between histopathological findings of joint capsule and synovium, and postoperative clinical outcomes and treatment in patients with isolated type II SLAP lesions. Almost 20% of patients who had pathologic histological findings in joint capsule and synovium needed pain control and long-duration rehabilitation program after arthroscopic surgery for better shoulder function recovery and prevention of shoulder stiffness.

The Top 50 Most-Cited Papers in the Diagnosis and Management of SLAP Tears

Purpose

To identify and characterize the top 50 most-cited articles regarding SLAP tears.

Methods

Referencing the methodology of previous citation analyses, varying Boolean searches were performed using the Web of Science database and the search terms yielding the greatest number of results was used. The top 50 most-cited articles were identified and the following data points were gathered from each article: author, institution, country of origin, year of publication, publishing journal, level of evidence, and citation density.

Results

The total number of citations was 7834, with a median of 106 citations. The top 50 list was largely composed of diagnostic level I, II, and III studies (5, 7, and 8 total publications, respectively) and therapeutic level III (6 publications) or level IV (10 publications). Most articles originated from the United States (40). In total, 19 of the top 50 most-cited articles were published in the American Journal of Sports Medicine, followed by Arthroscopy (15) and the Journal of Bone and Joint Surgery (5).

Conclusions

Our analysis demonstrated a correlation with earlier publications being cited more frequently than recent studies. Importantly, the current study found that therapeutic studies in the most cited list were largely level III or level IV evidence. This makes the management of SLAP tears seem anecdotal, with little in the way of high-impact level I or level II therapeutic studies. We must reconsider our current understanding of SLAP tears and their management with more studies that demonstrate a clearer treatment algorithm for these common injuries of the shoulder.

Clinical Relevance

Given the complexity of SLAP tears, this list of the most-cited articles can provide a reference point to better guide practice, resident education, and future areas of orthopaedic research.

Comparing clinical outcomes between rotator cuff repairs, SLAP repairs, and combined repairs

BACKGROUND

Superior labrum lesion from anterior to posterior (SLAP) often presents together with other shoulder pathologies such as rotator cuff tear (RCT), but it is uncertain if repairing both SLAP and RCT has superior clinical outcomes over isolated repairs of SLAP and RCT.

MATERIALS AND METHODS

This was a retrospective cohort study with prospectively collected data, reviewing 157 patients who underwent arthroscopic repair of either RCT, SLAP (type II lesion), or both. Before surgery and after 6 weeks, 12 weeks, and 24 weeks, shoulder objective range of motion and strength were measured, patient-reported function and pain was assessed by the modified L'Insalata questionnaire with a Likert scale, and complications after each repair were examined.

RESULTS

At 24 weeks after surgery, the combined group (n = 22) and SLAP group (n = 47) had significantly higher forward flexion (165° ± 4° and 167° ± 4° vs. 154° ± 3°, P = .01 and P = .01), external rotation strength (82 ± 6 N, 81 ± 6 N vs. 61 ± 3 N, P = .01 and P = .01), and abduction strength (94 ± 14 N, 78 ± 8 N vs. 53 ± 3 N, P = .001 and P = .02) compared with the rotator cuff tear repair (RCR) group (n = 88). The combined group also had stronger internal rotation than the RCR group (107 ± 12 N vs. 72 ± 4 N, P = .02). Function and pain improved from "severe-moderate" to "moderate-mild" in all groups after surgery.

CONCLUSION

Repairing RCT and SLAP tears together results in significant clinical benefits compared to repairing just RCT and analogous results against SLAP-only repair.

Stress Distribution Patterns Across the Shoulder Joint in Gymnasts: A Computed Tomography Osteoabsorptiometry Study

Background:

The distribution pattern of subchondral bone density is an indicator of stress distribution over a joint surface under long-term physiologic loading. The biomechanical characteristics of the articular surfaces of the shoulder joint in gymnasts can be determined by measuring this distribution pattern.

Purpose:

To evaluate the distribution of subchondral bone density across the shoulder joint in male collegiate gymnasts and to determine the effects of gymnastic activities on its articular surfaces under long-term loading conditions using computed tomography osteoabsorptiometry (CTOAM).

Study Design:

Descriptive laboratory study.

Methods:

CT image data were obtained from both shoulders of 12 asymptomatic male collegiate gymnasts (gymnast group; mean age, 19.4 years; range, 18-22 years) and 10 male collegiate volunteers (control group; mean age, 20.2 years; range, 18-22 years). The distribution pattern of subchondral bone density across the articular surfaces of each shoulder joint was assessed by CTOAM. Quantitative analysis was performed of the locations and percentages of high-density areas on the articular surface.

Results:

Stress distribution patterns over the articular surfaces differed between the gymnasts and the controls. In the gymnasts, high-density areas were detected on the posterosuperior articular surface of the humeral head and the anterosuperior and/or posterosuperior articular surface of the glenoid. Mean bone density was greater in the gymnasts than in the controls (P < .0001).

Conclusion:

Stress distribution over the articular surfaces of the shoulder joint was affected by gymnastic activities. Stress was concentrated over the superior part of the glenohumeral joint in male collegiate gymnasts.

Clinical Relevance:

The present findings suggest that gymnastic activities increase stress to the articular surfaces of the superior glenohumeral joint. This supports the notion that mechanical conditions play a crucial role in the origin of disorders particular to gymnastic activities.

THE SUCCESS OF RETURN TO SPORT AFTER SUPERIOR LABRUM ANTERIOR TO POSTERIOR (SLAP) TEARS: A SYSTEMATIC REVIEW AND META-ANALYSIS

Background

Reviews on superior labral anterior to posterior (SLAP) injuries have been reported in the literature. However, current reviews have not focused on the success of athletes return to their previous level of sport or athletic performance.

Hypothesis/Purpose

Systematically review return to sport (RTS) and return to sport at previous level (RTSP) proportions after SLAP injury while reporting any additional performance metrics and outcome measures.

Study Design

Systematic Review & Meta-Analysis.

Methods

A computer assisted literature search of MEDLINE, CINAHL, Embase and SportDiscus databases utilizing keywords related to RTS post-surgery for SLAP tear was implemented. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines were utilized for study methodology. Quality assessment utilized the MINORS scale.

Results

Twenty-two studies (617 athletes) qualified for analysis. Based on limited evidence from level 3b to 4 studies, athletes RTS post intervention for SLAP injury occurred at a rate of 93% (95% CI:87 to 98%) and overall RTSP rate was 72% (95% CI:60 to 83%). The mean time to RTS post intervention was reported in 59% of studies at 6.9 ± 2.9 months. Patient reported outcome measures (PROM's) were reported in 86% of studies. There was limited reporting of performance statistics, rehabilitation guidelines, return to sport criteria, and information regarding SLAP diagnosis in the available studies. None of the included studies reported post-surgical athletic performance or career longevity.

Conclusions

Limited evidence suggests that less than three in four athletes return to their previous level of sport participation after SLAP injury intervention. Treatment success for an athlete with SLAP injury remains relatively unknown as only 59% of included studies clearly delineate RTS from RTSP and neither athletic performance nor career longevity were reported in any included studies. Future studies of higher quality are required for this determination.

Level of Evidence

Level 1a.

National Trends in the Repair of Isolated Superior Labral Tear from Anterior to Posterior in Korea

BACKGROUND

The optimal treatment for superior labral tear from anterior to posterior (SLAP) lesions is controversial. Thus, we aimed to investigate the national surgical trends in isolated SLAP repair in Korea.

METHODS

We analyzed a nationwide database from the Korean Health Insurance Review and Assessment Service from 2008 to 2017. We investigated the trends in SLAP repair by time, sex, age, and the type of health care institution.

RESULTS

From 2008 to 2017, 27,850 isolated SLAP repairs were identified. Age-adjusted incidence rate of isolated SLAP repair increased by 692% from 1.07/100,000 in 2008 to 8.48/100,000 in 2012 (P = 0.005). However, the incidence rate declined significantly after 2012 (P = 0.032) and was 5.28/100,000 in 2017. Sex-specific incidence rate of isolated SLAP repair was 2.3 times higher in men than in women. The decline since 2012 was most evident in patients aged ≥ 40 years (P = 0.01); however, the incidence rates of isolated SLAP repair during the study period were similar between patients aged ≥ 40 years and those aged < 40 years. Moreover, hospitals with 30-100 beds had the greatest change in the number of isolated SLAP repair cases.

CONCLUSION

In Korea, the incidence of isolated SLAP repair increased dramatically until 2012; since then, it has declined. Although the decrease in isolated SLAP repair later in the study was evident in those aged ≥ 40 years, the incidence rate was still relatively high in patients aged ≥ 40 years.

Scapular Dyskinesis and the Kinetic Chain: Recognizing Dysfunction and Treating Injury in the Tennis Athlete

PURPOSE OF REVIEW

This article aims to provide a comprehensive understanding of the evaluation, diagnosis, and management of scapular dyskinesis and its impact on the kinetic chain in tennis athletes.

RECENT FINDINGS

Optimal glenohumeral biomechanics are intimately associated with proper scapular motion and function. The tennis serve requires the scapula to act as a force transducer in the kinetic chain to convert potential energy generated in the lower extremities to kinetic energy in the upper extremity. Any aberration within this complex kinetic chain will result in force uncoupling and increases the potential for injury through compensatory mechanisms. Specifically, scapular dyskinesis has been associated with an increased risk of shoulder pain of up to 43% in overhead athletes. These pathologies include rotator cuff disease, subacromial and posterior impingement, labral injuries, and SLAP tears. Although the direct causality of these injuries remains controversial, multiple kinematic studies have demonstrated altered scapular positioning increasing the predilection for soft tissue pathology. The diagnosis of scapular dyskinesis is predicated upon a thorough history, physical examination, and observational analysis of key nodes in the kinetic chain during tennis activity. Conservative management remains the mainstay of treatment and consists of a graduated physical therapy regimen. Although shoulder pain in the overhead athletes is often multifactorial, early recognition and treatment of scapular dyskinesis generally carry a favorable prognosis and result in improved patient outcomes.

Biomechanical Comparison of Knotless All-Suture Anchors and Knotted All-Suture Anchors in Type II SLAP Lesions: A Cadaveric Study

PURPOSE

To compare the biomechanical performance of knotless versus knotted all-suture anchors for the repair of type II SLAP lesions with a simulated peel-back mechanism.

METHODS

Twenty paired cadaveric shoulders were used. A standardized type II SLAP repair was performed using knotless (group A) or knotted (group B) all-suture anchors. The long head of the biceps (LHB) tendon was loaded in a posterior direction to simulate the peel-back mechanism. Cyclic loading was performed followed by load-to-failure testing. Stiffness, load at 1 and 2 mm of displacement, load to repair failure, load to ultimate failure, and failure modes were assessed.

RESULTS

The mean load to repair failure was similar in groups A (179.99 ± 58.42 N) and B (167.83 ± 44.27 N, P = .530). The mean load to ultimate failure was 230 ± 95.93 N in group A and 229.48 ± 78.45 N in group B and did not differ significantly (P = .958). Stiffness (P = .980), as well as load at 1 mm (P = .721) and 2 mm (P = .849) of displacement, did not differ significantly between groups. In 16 of the 20 specimens (7 in group A and 9 in group B), ultimate failure occurred at the proximal LHB tendon. Failed occurred through slippage of the labrum in 1 specimen in each group and through anchor pullout in 2 specimens in group A.

CONCLUSIONS

Knotless and knotted all-suture anchors displayed high initial fixation strength with no significant differences between groups in type II SLAP lesions. Ultimate failure occurred predominantly as tears of the proximal LHB tendon.

CLINICAL RELEVANCE

All-suture anchors have a smaller diameter than solid anchors, can be inserted through curved guides, preserve bone stock, and facilitate postoperative imaging. There is a paucity of literature investigating the biomechanical capacities of knotless versus knotted all-suture anchors in type II SLAP repair.

Patient-Reported Outcome Measures and Health-Related Quality-of-Life Scores of Patients Undergoing Anatomic Total Shoulder Arthroplasty

BACKGROUND

Health-related quality-of-life (HRQoL) scores are required for cost-effectiveness and health-care value analysis. We evaluated HRQoL scores and patient-reported outcome measures (PROMs) in patients with advanced glenohumeral osteoarthritis treated with anatomic total shoulder arthroplasty to establish values of HRQoL scores that can be used for cost-effectiveness and value analysis and to assess relationships between HRQoL scores and shoulder and upper-extremity PROMs.

METHODS

We analyzed 143 patients (143 shoulders) with glenohumeral osteoarthritis treated with anatomic total shoulder arthroplasty; 92 patients had 1-year follow-up. Preoperative and postoperative functional outcomes were assessed with the Disabilities of the Arm, Shoulder and Hand (DASH) score, the American Shoulder and Elbow Surgeons (ASES) score, the Simple Shoulder Test (SST), and a visual analog scale (VAS) for shoulder pain and function. Health utility was assessed with the EuroQol-5 Dimensions (EQ-5D), Short Form-6 Dimensions (SF-6D), and VAS Quality of Life (VAS QoL). HRQoL score validity was determined through correlations between the PROMs and HRQoL scores. The responsiveness of HRQoL scores was measured through the effect size and the standardized response mean.

RESULTS

There were significant improvements in all PROMs and HRQoL scores (p < 0.001) at 1 year after the surgical procedure. The changes in VAS QoL (very weak to moderate), EQ-5D (weak), and SF-6D (weak) were significantly correlated (p < 0.05) with the changes in PROMs, demonstrating comparably acceptable validity. There were large effect sizes in the VAS QoL (1.843), EQ-5D (1.186), and SF-6D (1.084) and large standardized response mean values in the VAS QoL (1.622), EQ-5D (1.230), and SF-6D (1.083), demonstrating responsiveness. The effect sizes of all PROMs were larger than those of the HRQoL scores.

CONCLUSIONS

PROMs and HRQoL scores are not interchangeable, and studies of the cost-effectiveness and value of shoulder arthroplasty should incorporate both shoulder and upper-extremity PROMs and HRQoL scores. The findings of this study provide data on HRQoL scores that are specific to the treatment of advanced glenohumeral osteoarthritis with anatomic total shoulder arthroplasty and can be used for future cost-effectiveness and value analysis studies.

LEVEL OF EVIDENCE

Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.

Comparison of shoulder range of motion, strength, and upper quarter dynamic balance between NCAA division I overhead athletes with and without a history of shoulder injury

OBJECTIVE

To determine differences in shoulder range of motion, strength, and upper quarter dynamic balance between collegiate overhead athletes with and without a history of a shoulder injury.

DESIGN

Cross-sectional study.

SETTING

Athletic training clinic.

PARTICIPANTS

58 overhead athletes who were fully participating in NCAA Division I overhead sports (baseball, softball, volleyball, and tennis) and free of any current shoulder injury were included. Participants were divided into a shoulder injury history group (n = 25) and uninjured group (n = 33). Participants in the shoulder injury history group had a previously resolved shoulder injury.

MAIN OUTCOME MEASURES

Active range of motion assessments for shoulder internal rotation, external rotation, and horizontal adduction. Isometric strength assessments for shoulder IR and ER. The Upper Quarter Y-Balance Test.

RESULTS

The shoulder injury history group demonstrated a lower Upper Quarter Y-Balance Test mean score in the superolateral direction (p = .03, d = 0.56), but no group differences existed for other results (p > .05).

CONCLUSIONS

Overhead athletes with a history of shoulder injury had worse upper quarter dynamic balance versus those without the history. From a clinical perspective, the findings may have significant implications for developing shoulder re-injury prevention and rehabilitation protocols in relation to their shoulder injury history.

Molecular Pattern and Density of Axons in the Long Head of the Biceps Tendon and the Superior Labrum

The type II superior labrum anterior to posterior (SLAP) repair is a viable option in young and demanding patients, although a prolonged period of pain after surgery is described in the literature. The reason for this fact remains unknown. Thus, the purpose of this study was to investigate the molecular pattern of the biceps tendon anchor, where the sutures for repair are placed. The long head of the biceps tendon (LHBT), including the superior labrum, was dissected in the setting of reverse total shoulder arthroplasty. Immunohistochemical staining was performed using neurofilament (NF) and protein gene product (PGP) 9.5 as general markers for axons and calcitonin gene-related peptide (CGRP) and substance P for nociceptive transmission. A quantitative assessment was performed according to the two regions of interest (ROIs), i.e., the anterosuperior (ROI I) and the posterosuperior labrum (ROI II). Eleven LHBTs with a mean age of 73 years (range: 66–87 years) were harvested intraoperatively. Six LHBTs were gained in osteoarthrosis and five in fractures. We found an inhomogeneous distribution of axons in the anterosuperior and posterosuperior parts of the labrum in all the specimens irrespective of the age, gender, and baseline situation. There was a significantly higher number (p < 0.01) as well as density (p < 0.001) of NF-positive axons in ROI I compared to ROI II. Nociceptive fibers were always found along the NF-positive axons. Thus, our results indicate that the biceps tendon anchor itself is a highly innervated region comprising different nerve qualities. The anterosuperior labrum contains a higher absolute number and density of axons compared to the posterosuperior parts. Furthermore, we were able to prove the presence of nociceptive fibers in the superior labrum. The results obtained in this study could contribute to the variability of pain after SLAP repair.

Evaluation and Management of Scapular Dyskinesis in Overhead Athletes

PURPOSE OF REVIEW

This review will outline scapular function in throwing, discuss scapular dyskinesis as an impairment of function that can be associated with throwing injuries and altered performance, and present an algorithm that encompasses guidelines for evaluation and can serve as a basis for treatment.

RECENT FINDINGS

Optimal scapular function is integral to optimal shoulder function. Multiple roles of the scapula in arm function and throwing have been identified while scapular dysfunction continues to be associated with various shoulder pathologies. Although scapular motion alterations may be common in overhead athletes, various reports have shown that identification and management of the alterations can result in improved rehabilitation and performance outcomes. Baseball throwing occurs as the result of integrated, multisegmented, sequential joint motion, and muscle activation within the kinetic chain. The scapula is a key component link within the chain through its function to maximize the scapulohumeral rhythm and efficient throwing mechanics. Evaluation and management beginning with the scapula can produce improved outcomes related to shoulder pathology in overhead athletes.

Patient-Reported Outcome Measures and Health-Related Quality-of-Life Scores of Patients Undergoing Anatomic Total Shoulder Arthroplasty

BACKGROUND

Health-related quality-of-life (HRQoL) scores are required for cost-effectiveness and health-care value analysis. We evaluated HRQoL scores and patient-reported outcome measures (PROMs) in patients with advanced glenohumeral osteoarthritis treated with anatomic total shoulder arthroplasty to establish values of HRQoL scores that can be used for cost-effectiveness and value analysis and to assess relationships between HRQoL scores and shoulder and upper-extremity PROMs.

METHODS

We analyzed 145 patients (145 shoulders) with glenohumeral osteoarthritis treated with anatomic total shoulder arthroplasty; 93 patients had 1-year follow-up. Preoperative and postoperative functional outcomes were assessed with the Disabilities of the Arm, Shoulder and Hand (DASH) score, the American Shoulder and Elbow Surgeons (ASES) score, the Simple Shoulder Test (SST), and a visual analog scale (VAS) for shoulder pain and function. Health utility was assessed with the EuroQol-5 Dimensions (EQ-5D), Short Form-6 Dimensions (SF-6D), and VAS Quality of Life (VAS QoL). HRQoL score validity was determined through correlations between the PROMs and HRQoL scores. The responsiveness of HRQoL scores was measured through the effect size and the standardized response mean.

RESULTS

There were significant improvements in all PROMs and HRQoL scores (p < 0.001) at 1 year after the surgical procedure. The changes in VAS QoL and EQ-5D were significantly correlated (weak to moderate) with the changes in all PROMs except the SST, demonstrating comparably acceptable validity. The VAS QoL had a large effect size (1.833) and standardized response mean (1.603), and the EQ-5D also had a large effect size (1.163) and standardized response mean (1.228), demonstrating responsiveness. The effect sizes of all PROMs were larger than those of the HRQoL scores. The change in SF-6D had only a moderate effect size and standardized response mean and was not significantly correlated with the change in any of the PROMs.

CONCLUSIONS

PROMs and HRQoL scores are not interchangeable, and studies of the cost-effectiveness and value of shoulder arthroplasty should incorporate both shoulder and upper-extremity PROMs and HRQoL scores. The findings of this study provide data on HRQoL scores that are specific to the treatment of advanced glenohumeral osteoarthritis with anatomic total shoulder replacement and can be used for future cost-effectiveness and value analysis studies.

LEVEL OF EVIDENCE

Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.

Arthroscopic Repair of Type II SLAP Lesions in Overhead Athletes

For overhead athletes and, in particular, baseball pitchers, the rates of success and return to play for those who have undergone arthroscopic repair of type II SLAP lesions are poor, ranging from 7% to 62%. The reasons for the poor results and high failure rates in overhead athletes with type II SLAP repairs are multifactorial and are a combination of many factors. These factors include the failure to establish the diagnosis and treat these athletes preoperatively; the inability of the operating surgeon to differentiate normal anatomic variants from pathologic SLAP lesions at the time of surgery; the surgical technique, which may violate the rotator cuff; or the placement of suture anchors, which restricts external rotation and alters overhead throwing mechanics. The proper diagnosis of SLAP lesions can be difficult because SLAP tears rarely occur in isolation and are often associated with other shoulder pathology. A proper history detailing the onset of symptoms and whether there was an acute episode of trauma or a history of repetitive use is critical. It is important to remember that no single physical examination finding is pathognomonic for SLAP tears. When seen in isolation, SLAP tears may mimic impingement syndrome (52%) or even anterior instability (39%). Surgical treatment of type II SLAP lesions should not be undertaken lightly in overhead athletes. If a 3-month rehabilitation period followed by a return to sports over the following 3 months does not allow the athlete to return to his or her preinjury level, diagnostic arthroscopy with SLAP repair is a reasonable option and can yield excellent results using the proper techniques. The technique described in detail in this article and our video can be technically demanding, but with the key points outlined, it can be reproduced and provide excellent results for overhead athletes undergoing SLAP repair. By not violating the rotator cuff, using a mattress configuration and keeping the suture knot away from the articular surface, and by not going anterior to the biceps tendon for repair, external rotation and strength can be preserved, leading to an excellent result with a predictable return to play for overhead athletes.

Return to Sport After the Surgical Treatment of Superior Labrum Anterior to Posterior Tears: A Systematic Review

Background:

Controversy exists as to the optimal treatment of superior labrum anterior to posterior (SLAP) tears in athletes. There are no systematic reviews evaluating return-to-sport (RTS) rates after arthroscopic SLAP repair and biceps tenodesis.

Purpose:

To compare the overall RTS rates in patients with primary type 2 SLAP tears who were managed with arthroscopic SLAP repair versus biceps tenodesis.

Study Design:

Systematic review; Level of evidence, 4.

Methods:

A review was performed according to the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines by searching the MEDLINE (PubMed), Embase (Elsevier), and Cochrane Library databases. Inclusion criteria were clinical studies that evaluated RTS rates after arthroscopic SLAP repair, arthroscopic SLAP repair with partial rotator cuff debridement, and biceps tenodesis. The studies were analyzed for quality and inclusion in the final analysis. Data relevant to RTS rates were then extracted and compiled, and outcomes were compared.

Results:

Of the 337 studies initially identified, 15 (501 patient-athletes) met inclusion criteria. These consisted of 195 patients who underwent isolated arthroscopic SLAP repair (mean age, 31 years; mean follow-up, 3.2 years), 222 patients who underwent arthroscopic SLAP repair with partial rotator cuff debridement (mean age, 22 years; mean follow-up, 5.1 years), and 84 patients who underwent biceps tenodesis (mean age, 42 years; mean follow-up, 3.3 years). The overall RTS rates were high for all 3 procedures (SLAP repair, 79.5%; SLAP repair with rotator cuff debridement, 76.6%; biceps tenodesis, 84.5%), with biceps tenodesis having the highest overall rate. Biceps tenodesis also had the highest RTS rate at the preinjury level (78.6%) compared with SLAP repair (63.6%) and SLAP repair with rotator cuff debridement (66.7%).

Conclusion:

Primary arthroscopic SLAP repair, arthroscopic SLAP repair with partial rotator cuff debridement, and biceps tenodesis all provide high RTS rates. Biceps tenodesis as an operative treatment of primary SLAP lesions may demonstrate an overall higher RTS rate when compared with traditional SLAP repair in older athletes. More, higher level studies are needed that control for age, level of activity, and type of sport (overhead vs nonoverhead) to determine the efficacy of biceps tenodesis as a primary alternative to arthroscopic SLAP repair in young athletes who present with type 2 SLAP tears.

Trends in the Management of Isolated SLAP Tears in the United States

Background:

The management of superior labrum anterior and posterior (SLAP) tears remains controversial, with surgical treatment options including SLAP repair, debridement, and open or arthroscopic biceps tenodesis (BT), based on patient factors and the type of tear.

Hypothesis:

We hypothesized that SLAP repair has become less frequently performed over time, while BT is more frequently performed, particularly in patients ≥ 40 years.

Study Design:

Descriptive epidemiology study.

Methods:

A retrospective query was performed using the Humana insurance database from years 2007 to 2016. For the management of a SLAP tear diagnosis (International Classification of Diseases–Ninth Edition [ICD-9] code: 840.7), independent and exclusive cohorts were formed using Current Procedural Terminology (CPT) codes for debridement (29822, 29823), SLAP repair (29807), open or arthroscopic BT (29828, 23430), and SLAP repair combined with BT (29828 OR 23430 AND 29807).

Results:

Of 46,650 diagnoses of a SLAP tear, there were 3347 patients who underwent operative management for an isolated SLAP tear from 2007 to 2016. There was a linear increase of SLAP tear diagnoses per year (r² = 0.800, P < .001) during this period. Overall, SLAP repair was performed in 1629 patients (48.7%), debridement was performed in 1076 patients (32.1%), BT was performed in 552 patients (16.5%), and combined SLAP repair and BT was performed in 90 patients (2.7%). There was a 69.3% decrease in isolated SLAP repair from 2007 to 2016 (r² = 0.882, P < .001). BT for the diagnosis of an isolated SLAP tear increased by 370.0% over the same period (r² = 0.800, P < .001). SLAP repair had an equivalent percentage of being performed in patients both older and younger than 40 years (P = .218). There was a 1500.0% increase in BT performed in patients older than 40 years during the study period. There were no statistical differences in the postoperative incidence of stiffness, surgical site infections, and reoperations between all surgical treatment groups (P > .05).

Conclusion:

An analysis of a large private-payer database revealed that surgical treatment of isolated SLAP tears in the United States has shifted from 2007 to 2016, with an increase in the frequency of BT and a decline in the frequency of SLAP repair, particularly in patients older than 40 years.

SLAP lesions: current controversies

Knowledge of the pertinent anatomy, pathogenesis, clinical presentation and treatment of the spectrum of injuries involving the superior glenoid labrum and biceps origin is required in treating the patient with a superior labrum anterior and posterior (SLAP) tear.Despite the plethora of literature regarding SLAP lesions, their clinical diagnosis remains challenging for a number of reasons.First, the diagnostic value of many of the available physical examination tests is inconsistent and ambiguous.Second, SLAP lesions most commonly occur concomitantly with other shoulder injuries.Third, SLAP lesions have no specific associated pain pattern.Outcomes following surgical treatment of SLAP tears vary depending on the method of treatment, associated pathology and patient characteristics.Biceps tenodesis has been receiving increasing attention as a possible treatment for SLAP tears. Cite this article: EFORT Open Rev 2019;4:25-32. DOI: 10.1302/2058-5241.4.180033.

Postural differences in shoulder dynamics during pushing and pulling

Assessments of shoulder dynamics (e.g. the inertial, viscous, and stiffness properties of the joint) can provide important insights into the stability of the joint at rest and during volitional contraction. The purpose of this study was to investigate how arm posture influences shoulder dynamics while generating pushing or pulling torques in the horizontal plane. Sixteen healthy participants were examined in seven postures encompassing a large workspace of the shoulder. At each posture, the participant's shoulder was rapidly perturbed while measuring the resultant change in shoulder torque about the glenohumeral axis. Participants were examined both at rest and while producing horizontal flexion and extension torques scaled to 15% of a maximum voluntary contraction. Shoulder stiffness, viscosity, and damping ratio were estimated using impedance-based matching, and changes in these outcome measures with torque level, elevation angle, and plane of elevation angle were explored with a linear mixed effects model. Shoulder stiffness was found to decrease with increasing elevation angles (p < 0.001) without subsequent changes in viscosity, leading to a greater damping ratios at higher elevation angles (p < 0.001). Shoulder stiffness, viscosity, and damping ratio (all p < 0.05) were all found to significantly increase as the plane of elevation of the arm was increased. The relationship between the viscosity, stiffness and the damping ratio of the shoulder is one that the central nervous system must regulate in order to maintain stability, protect against injury, and control the shoulder joint as the inertial and muscle contributions change across different arm postures.

The influence of reconstruction choice and inclusion of radiation therapy on functional shoulder biomechanics in women undergoing mastectomy for breast cancer

PURPOSE

The functional implications of reconstructing the breast mound with a latissimus dorsi (LD) flap or placing an implant under the pectoralis major (PM) muscle is complicated by potential comorbidities from disinserting these muscles and adjuvant radiotherapy. We utilized novel robot-assisted measures of shoulder stiffness and strength to dissociate how breast reconstruction choice and inclusion of radiation therapy impact shoulder morbidity in post-mastectomy reconstruction patients.

METHODS

Shoulder strength and stiffness were collected from 10 irradiated LD flap breast reconstruction patients, 14 two-stage subpectoral implant reconstruction patients (subpectoral), and 10 irradiated deep inferior epigastric perforator (DIEP) flap patients an average of 659 days post-reconstruction. Univariate ANOVAs examined surgical group differences in strength and stiffness.

RESULTS

There were main effects of surgical group on vertical adduction, vertical abduction, and internal rotation strength. The LD flap group was significantly weaker than the subpectoral group in all measures and significantly weaker than the DIEP group during vertical adduction. There was also a main effect of surgical group on vertical adduction stiffness, where the LD group exhibited significantly reduced stiffness while producing vertical adduction torque. No significant differences between the subpectoral and DIEP groups existed for any measure of shoulder strength or stiffness.

CONCLUSIONS

Disinsertion of the LD, not the disinsertion of the PM or radiotherapy, contributes to strength deficits following LD flap breast reconstructions. The combined disinsertion of the PM and LD compromises shoulder stability in the vertical plane. Shoulder function should be a focal point of the surgical decision-making process and postsurgical care.

An Age and Activity Algorithm for Treatment of Type II SLAP Tears

Background

Type II SLAP tears predominantly occur in males between their third and fifth decades of life. The mechanism of injury is often repeated overheard activity but can also occur due to direct compression loads and traction injuries. The treatment options have changed over the years and include non-operative therapy, direct labral-biceps complex repair, and labral debridement with biceps tenodesis or tenotomy.

Objective

To review the existing literature on the management of Type II SLAP tears and provide clinical recommendations based on patient age and activity level.

Methods

A review of the existing literature through October 2017 investigating the management of Type II SLAP tears was performed. Emphasis was placed on distinguishing the outcomes based on age and activity level to provide an appropriate treatment algorithm.

Results

Patients with Type II SLAP tears should first be trialed with non-operative management and many patients will have a successful result with ability to return to their respective sports or activities. Surgical management should be considered if non-operative management does not provide symptomatic relief. Young, athletic, or high-demand patients should be treated with a SLAP repair while biceps tenodesis should be considered for older or worker's compensation patients. Patients undergoing revision surgery for a failed SLAP repair should be managed with biceps tenodesis.

Conclusion

Type II SLAP tears remain a difficult pathology to manage clinically, but the treatment indications are narrowing. The age and activity algorithm described in this review provides an effective method of managing this complex clinical condition.