When do rotator cuff repairs fail? Serial ultrasound examination after arthroscopic repair of large and massive rotator cuff tears

Clinical and radiological evaluation after arthroscopic rotator cuff repair using suture bridge technique

Background

We retrospectively assessed the clinical outcomes and investigated risk factors influencing retear after arthroscopic suture bridge repair technique for rotator cuff tear through clinical assessment and magnetic resonance arthrography (MRA).

Methods

Between January 2008 and April 2011, sixty-two cases of full-thickness rotator cuff tear were treated with arthroscopic suture bridge repair technique and follow-up MRA were performed. The mean age was 56.1 years, and mean follow-up period was 27.4 months. Clinical and functional outcomes were assessed using range of motion, Korean shoulder score, Constant score, and UCLA score. Radiological outcome was evaluated with preoperative and follow-up MRA. Potential predictive factors that influenced cuff retear, such as age, gender, geometric patterns of tear, size of cuff tear, acromioplasty, fatty degeneration, atrophy of cuff muscle, retraction of supraspinatus, involved muscles of cuff and osteolysis around the suture anchor were evaluated.

Results

Thirty cases (48.4%) revealed retear on MRA. In univariable analysis, retear was significantly more frequent in over 60 years age group (62.5%) than under 60 years age group (39.5%; p = 0.043), and also in medium to large-sized tear than small-sized tear (p = 0.003). There was significant difference in geometric pattern of tear (p = 0.015). In multivariable analysis, only age (p = 0.036) and size of tear (p = 0.030) revealed a significant difference. The mean active range of motion for forward flexion, abduction, external rotation at the side and internal rotation at the side were significantly improved at follow-up (p < 0.05). The mean Korean shoulder score, Constant score, and UCLA score increased significantly at follow-up (p < 0.01). The range of motion, Korean shoulder score, Constant score, and UCLA score did not differ significantly between the groups with retear and intact repairs (p > 0.05). The locations of retear were insertion site in 10 cases (33.3%) and musculotendinous junction in 20 cases (66.7%; p = 0.006).

Conclusions

Suture bridge repair technique for rotator cuff tear showed improved clinical results. Cuff integrity after repair did not affect clinical results. Age of over 60 years and size of cuff tear larger than 1 cm were factors influencing rotator cuff retear after arthroscopic suture bridge repair technique.

Free biceps tendon autograft to augment arthroscopic rotator cuff repair

Arthroscopic rotator cuff repairs have become the standard of treatment for all sizes of tears over the past several years. Current healing rates reported in the literature are quite good, but improving the healing potential of rotator cuff repairs remains a challenging problem. There has been an increase recently in the use of augmentation of rotator cuff repairs with xenografts or synthetics for large and massive tears. Biceps tenodesis is often indicated as part of the treatment plan while one is performing rotator cuff surgery. A subpectoral biceps tenodesis provides a source of autograft to augment rotator cuff repairs of all sizes. Two techniques are presented to augment rotator cuff repairs with a free biceps tendon autograft. This is a novel idea in an attempt to improve healing rates and long-term results of rotator cuff repairs of all sizes.

Results of arthroscopic partial repair of large retracted rotator cuff tears

PURPOSE

To evaluate the midterm results of partial rotator cuff repair using the Constant score and the acromiohumeral radiographic measurement.

METHODS

Thirty-eight patients with a mean age of 65 years and a large retracted rotator cuff tear (at least 2 tendons) were included in the study. Patients underwent clinical examination, standard radiography, and isometric strength testing at a mean follow-up of 47 months. The rotator cuff tears were classified as posterosuperior, anterosuperior, or global tears (≥3 tendons), and an arthroscopic partial repair was performed.

RESULTS

The mean Constant score significantly increased from 56 points before surgery to 71 points after surgery (P = .041); the mean age- and sex-adjusted Constant score significantly improved from 63% to 90% at a mean follow-up of 47 months after arthroscopic partial rotator cuff repair (P = .003); and the subcategories pain and activity significantly improved (P = .001, P = .014, respectively). The active range of motion improved from 133° of flexion and 111° of abduction before surgery to 163° of forward flexion and 156° of abduction after surgery (P < .001). However, the active range of external rotation decreased from 44° before surgery to 36° after surgery. Further, there was a trend toward a decrease in the mean acromiohumeral distance from 7.0 mm before surgery to 5.6 mm after surgery. The abduction strength did not significantly improve after surgery (4.2 kg before surgery and 4.8 kg after surgery; P = .116).

CONCLUSIONS

An arthroscopic partial repair of the rotator cuff is an effective tool to improve the Constant score by restoring active forward flexion and abduction and through pain relief. Further, we found that a pathologically decreased acromiohumeral distance cannot be reversed by a partial rotator cuff repair.

LEVEL OF EVIDENCE

Level IV, therapeutic case series.

Morphology of large rotator cuff tears and of the rotator cable and long-term shoulder disability in conservatively treated elderly patients

OBJECTIVE

The objective of this study was to describe the morphology of the rotator cuff tendon tears and long-term shoulder disability in conservatively treated elderly patients and determine if an association exists between these factors.

METHODS

Assessment of the rotator cuff tendon tear dimensions and depth, rotator interval involvement, rotator cable morphology and location, and rotator cuff muscle status was carried out on magnetic resonance studies of 24 elderly patients treated nonoperatively for rotator cuff tendon tears. Long-term shoulder function was measured using the Western Ontario Rotator Cuff (WORC) index; Disabilities of the Shoulder, Arm, and Hand questionnaire; and the American Shoulder Elbow Self-assessment form, and a correlation between the outcome scores and morphologic magnetic resonance findings was carried out.

RESULTS

The majority of large rotator cuff tendon tears are limited to the rotator cuff crescent. Medial rotator interval involvement (isolated or in association with lateral rotator interval involvement) was significantly associated with WORC physical symptoms total (P = 0.01), WORC lifestyle total (P = 0.04), percentage of all WORC domains (P = 0.03), and American Shoulder Elbow Self-assessment total (P = 0.01), with medial rotator interval involvement associated with an inferior outcome.

CONCLUSIONS

Medial rotator interval tears are associated with long-term inferior outcome scores in conservatively treated elderly patients with large rotator cuff tendon tears.

Learning curve of office-based ultrasonography for rotator cuff tendons tears

PURPOSE

To compare the accuracy of ultrasonography and MR arthrography (MRA) imaging in detecting of rotator cuff tears with arthroscopic finding used as the reference standard.

METHODS

The ultrasonography and MRA findings of 51 shoulders that underwent the arthroscopic surgery were prospectively analysed. Two orthopaedic doctors independently performed ultrasonography and interpreted the findings at the office. The tear size measured at ultrasonography and MRA was compared with the size measured at surgery using Pearson correlation coefficients (r). The sensitivity, specificity, accuracy, positive predictive value, negative predictive value and false-positive rate were calculated for a diagnosis of partial-and full-thickness rotator cuff tears. The kappa coefficient was calculated to verify the inter-observer agreement.

RESULTS

The sensitivity of ultrasonography and MRA for detecting partial-thickness tears was 45.5 and 72.7 %, and that for full-thickness tears was 80.0 and 100 %, respectively. The accuracy of ultrasonograpy and MRA for detecting partial-thickness tears was 45.1 and 88.2 %, and that for full-thickness tears was 82.4 and 98 %, respectively. Tear size measured based on ultrasonography examination showed a poor correlation with the size measured at arthroscopic surgery (r = 0.21; p < 0.05). However, tear size estimated by MRA showed a strong correlation (r = 0.75; p < 0.05). The kappa coefficient was 0.47 between the two independent examiners.

CONCLUSIONS

The accuracy of office-based ultrasonography for beginner orthopaedic surgeons to detect full-thickness rotator cuff tears was comparable to that of MRA but was less accurate for detecting partial-thickness tears and torn size measurement. Inter-observer agreement on the interpretation was fair. These results highlight the importance of the correct technique and experience in operation of ultrasonography in shoulder joint.

LEVEL OF EVIDENCE

Diagnostic study, Level II.

The acromial index is not predictive for failed rotator cuff repair

BACKGROUND

The main objective of this study was to evaluate the association between the acromial index (AI) and the incidence of recurrent tears of the rotator cuff (RC) in a cohort of patients with full thickness tears who underwent arthroscopic primary repair.

METHODS

A prognostic study of a prospective case series of 103 patients with full thickness RC tears was undertaken. The average age was 59.5 years (39-74) and follow-up was 30.81 months (12-72). True anterior-posterior X-rays were obtained during the pre-operative evaluation. Pre and post-operative magnetic resonance imaging (MRI) were recorded.

RESULTS

Eighteen cases with recurrent tears (17.4%) were seen on post-operative MRI. The average AI for patients with recurrent tears was 0.711 ± 0.065 and for patients without recurrent tears 0.710 ± 0.064 (p < 0.05). A positive association between age and recurrent tears of the RC was noted (average ages: recurrent tears group 63 ± 5.9 years; group without recurrent tears 58.8 ± 7.5 years) (r = -0.216; p = 0.029). We did not find an association between size of the primary tear and recurrent tears (r = -0.075; p < 0.05) or between degrees of retraction of the primary and recurrent tears of the cuff (r = -0.073; p < 0.05). We observed that 38.9% of the recurrent tears cases presented with more than one tendon affected before the arthroscopy. At follow-up, none of these recurrent tears showed more than one tendon affected on MRI evaluation.

CONCLUSION

In this study, we found that the AI radiological measurement is not a predictor for recurrent tears of the RC after primary arthroscopic repair.

Time to failure after rotator cuff repair: a prospective imaging study

BACKGROUND

Failure of tendon healing after a rotator cuff repair is demonstrated by magnetic resonance imaging (MRI) as a fluid-filled defect within the tendon. The frequency of, and factors associated with, failure of the tendon repair to heal have been the focus of many clinical studies. The timing of when these defects occur has not been previously studied in a large prospectively defined patient population, to our knowledge. It was our hypothesis that the majority of failures occur within twelve weeks after surgery.

METHODS

One hundred and thirteen patients were enrolled in a multi-institutional prospective study. All patients had a standardized arthroscopic repair of a full-thickness tear of 1 to 4 cm as well as sequential MRI studies at six intervals from two weeks to fifty-two weeks. MRIs were reviewed at the time of imaging by the treating surgeon. Standardized patient-oriented clinical data were collected, physical examination was performed, and strength measurements were made preoperatively and postoperatively.

RESULTS

The treating surgeons diagnosed a recurrent tear with MRI in nineteen (17%) of the 113 patients within one year after surgery. The mean time to the retear was 19.2 weeks. There was a linear increase in retears over the first twenty-six weeks after surgery, and one additional tear was diagnosed between twenty-six and fifty-two weeks after repair.

CONCLUSIONS

Retears primarily occur between six and twenty-six weeks after arthroscopic rotator cuff repair, and few additional tears occur thereafter. A substantial number of retears occur between twelve and twenty-six weeks after repair.

LEVEL OF EVIDENCE

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

Evaluation of the Clinical-functional Results from Repairing Extensive Rotator Cuff Injury with Inclusion of the Tendon of the Long Head of the Biceps

OBJECTIVES

To assess the outcomes of the arthroscopic margin convergence of the posterior cuff to the biceps tendon.

METHODS

From October 2003 to December 2007, 20 patients with massive rotator cuff tear which include the rotator interval were treated with arthroscopic margin convergence of the posterior cuff to biceps tendon. Sixteen patients were female and four were male. The mean age was 58.95 years old. The dominant side was affected in 16 cases (80%). The outcomes were analysed according to the UCLA Score with a minimum follow-up period of two years.

RESULTS

The UCLA score improved, on average, 14 points (p < 0.001). Six patients had excellent results; nine good; three fair and two poor results. The mean improvement of forward flexion was 33o (p < 0.001), 3o of external rotation (p < 0.396) and two vertebral levels for internal rotation (p < 0.025).

CONCLUSION

The arthroscopic margin convergence of the posterior cuff to the biceps tendon leads to satisfactory results.

Setting patients' expectations for range of motion after arthroscopic rotator cuff repair

Arthroscopic rotator cuff repair is a reliable option for symptomatic patients who have failed conservative treatments. Limited evidence exists regarding early rehabilitation time points (less than 1 year) and the influence of tear size. The authors sought to determine whether a difference exists in pre- and postoperative range of motion among small, medium, and large isolated rotator cuff tears treated arthroscopically. Patient- and tear-specific demographics were analyzed in a retrospective series of patients who had undergone arthroscopic rotator cuff repair. Two hundred seventy-four patients (153 [56%] men and 121 [44%] women; mean age, 53 years) were analyzed. Small tears (n=158 [58%]) were more common than medium (n=70 [25%]) and large (n=46 [17%]) tears. Shoulder range of motion was measured preoperatively and at 2 and 6 weeks, 3 and 6 months, and 1 year postoperatively. At nearly all time points pre- and postoperatively, large tears were significantly stiffer than small tears in external rotation and forward elevation (P<.05). It takes 1 year to fully regain external rotation after small and medium tears, whereas mild residual stiffness remains after large tears. Full forward elevation is restored by 3 months for small tears vs 6 months for medium and large tears. Significant tear size-dependent differences exist in shoulder range of motion after arthroscopic repair of isolated rotator cuff tears. These data can be used to manage patients' expectations for range of motion after arthroscopic rotator cuff repair to improve patient satisfaction.

Failure with continuity in rotator cuff repair "healing"

BACKGROUND

Ten to seventy percent of rotator cuff repairs form a recurrent defect after surgery. The relationship between retraction of the repaired tendon and formation of a recurrent defect is not well defined. PURPOSE/ HYPOTHESES: To measure the prevalence, timing, and magnitude of tendon retraction after rotator cuff repair and correlate these outcomes with formation of a full-thickness recurrent tendon defect on magnetic resonance imaging, as well as clinical outcomes. We hypothesized that (1) tendon retraction is a common phenomenon, although not always associated with a recurrent defect; (2) formation of a recurrent tendon defect correlates with the timing of tendon retraction; and (3) clinical outcome correlates with the magnitude of tendon retraction at 52 weeks and the formation of a recurrent tendon defect.

STUDY DESIGN

Case series; Level of evidence, 4.

METHODS

Fourteen patients underwent arthroscopic rotator cuff repair. Tantalum markers placed within the repaired tendons were used to assess tendon retraction by computed tomography scan at 6, 12, 26, and 52 weeks after operation. Magnetic resonance imaging was performed to assess for recurrent tendon defects. Shoulder function was evaluated using the Penn score, visual analog scale (VAS) score for pain, and isometric scapular-plane abduction strength.

RESULTS

All rotator cuff repairs retracted away from their position of initial fixation during the first year after surgery (mean [standard deviation], 16.1 [5.3] mm; range, 5.7-23.2 mm), yet only 30% of patients formed a recurrent defect. Patients who formed a recurrent defect tended to have more tendon retraction during the first 6 weeks after surgery (9.7 [6.0] mm) than those who did not form a defect (4.1 [2.2] mm) (P = .08), but the total magnitude of tendon retraction was not significantly different between patient groups at 52 weeks. There was no significant correlation between the magnitude of tendon retraction and the Penn score (r = 0.01, P = .97) or normalized scapular abduction strength (r = -0.21, P = .58). However, patients who formed a recurrent defect tended to have lower Penn scores at 52 weeks (P = .1).

CONCLUSION

Early tendon retraction, but not the total magnitude, correlates with formation of a recurrent tendon defect and worse clinical outcomes. "Failure with continuity" (tendon retraction without a recurrent defect) appears to be a common phenomenon after rotator cuff repair. These data suggest that repairs should be protected in the early postoperative period and repair strategies should endeavor to mechanically and biologically augment the repair during this critical early period.

Intraoperative determinants of rotator cuff repair integrity: an analysis of 500 consecutive repairs

BACKGROUND

Rotator cuff repair has a relatively high (20%-90%) chance of retears. Patients with an intact rotator cuff 6 months after surgery have better subjective and objective outcomes at 6 months and 2 years after rotator cuff repair than those who do not have an intact repair.

PURPOSE

The aim of this study was to determine if, and if so which, intraoperative factors predict an intact repair 6 months after rotator cuff repair.

STUDY DESIGN

Cohort study; Level of evidence, 3.

METHODS

The study consisted of a cohort of 500 consecutive patients who had an arthroscopic rotator cuff repair performed by a single surgeon and an ultrasound evaluation using standard protocols of the repair 6 months after surgery. Exclusion criteria included previous fracture or shoulder surgery, incomplete or partial rotator cuff repair, and concomitant arthroplasty. Rotator cuff tear size was measured intraoperatively and mapped. The quality of the tendon, tendon mobility, and repair quality were assessed and ranked based on predetermined scales (1-4) and recorded on a specifically designed form. Logistic regression analysis was performed, with cuff integrity at 6-month follow-up as the dependent variable and tear/repair factors as the independent variables.

RESULTS

The overall postoperative retear rate was 19% at 6 months. The best predictor of rotator cuff integrity was preoperative tear size (correlation coefficient, r = 0.33; P < .001). Patients with small (≤2 cm(2)) rotator cuff tears were least likely to have retears (retear rate, 10%). As the tear size increased, the retear rate increased in a linear fashion: ≤2 cm(2) (10%), 2 to 4 cm(2) (16%), 4 to 6 cm(2) (31%), 6 to 8 cm(2) (50%), and >8 cm(2) (57%). Other surgeon-ranked intraoperative assessments did correlate with retears, but the correlations were relatively weak: repair quality (r = -0.17; P < .001), tendon mobility (r = -0.15; P < .001), and tendon quality (r = -0.14; P < .01). Regression analysis showed that the retear rate at 6-month follow-up was best predicted from the preoperative tear size and the surgeon-ranked repair quality: chance of retear = 0.38 + (0.02 × tear size in cm(2)) - (0.08 × repair quality). Tendon quality and tendon mobility did not contribute significantly to this prediction.

CONCLUSION

Tear size was the best intraoperative predictor of repair integrity after rotator cuff repair, with tears less than 2 cm(2) twice as likely to heal than tears greater than 6 cm(2).

Arthroscopic repair of concomitant type II SLAP lesions in large to massive rotator cuff tears: comparison with biceps tenotomy

BACKGROUND

There are no studies examining superior labrum anterior and posterior (SLAP) repair combined with repair of large to massive rotator cuff tears, and it is unclear whether a combined SLAP repair would lead to better outcomes than biceps tenotomy.

HYPOTHESIS

Tenotomy and rotator cuff repair would lead to better outcomes compared with those of combined SLAP and rotator cuff repair.

STUDY DESIGN

Cohort study; Level of evidence, 2.

METHODS

Our study population consisted of 36 patients who had undergone either combined SLAP and rotator cuff repair (when the biceps was too healthy to cut; group R = 16 patients) or tenotomy and rotator cuff repair (when any fraying or partial tear existed in the biceps tendon; group T = 20 patients) for concomitant type II SLAP lesions and large to massive rotator cuff tears. The cuff repair was performed in a single row for both groups. Outcomes were assessed by comparing range of motion as well as Simple Shoulder Test (SST), American Shoulder and Elbow Surgeons (ASES), and University of California, Los Angeles (UCLA) scores between the 2 groups.

RESULTS

At the 2-year follow-up, both groups demonstrated significant improvements in functional shoulder scores and range of motion. However, group T had better SST scores (group T, 9.3 ± 1.6; group R, 7.8 ± 1.9; P = .012), ASES scores (group T, 88.6 ± 8.9; group R, 80.4 ±8.9; P = .009), UCLA scores (group T, 29.6 ± 3.0; group R, 26.0 ± 4.2; P = .007), and forward flexion (group T, 145.9° ± 13.0°; group R, 132.5° ± 15.3°; P = .008). The mean tear size and the degree of preoperative muscle atrophy and fatty infiltration on magnetic resonance imaging were similar between the groups.

CONCLUSION

For patients with concomitant type II SLAP lesions and large to massive rotator cuff tears, the outcomes of simultaneous arthroscopic SLAP and rotator cuff repair were inferior to those of arthroscopic biceps tenotomy and cuff repair in terms of functional shoulder scores and range of motion. Biceps tenotomy and rotator cuff repair may be a more reliable method to address concomitant type II SLAP lesions and large to massive rotator cuff tears in patients, although a randomized controlled trial is needed to confirm the results.

Retraction of supraspinatus muscle and tendon as predictors of success of rotator cuff repair

BACKGROUND

The structural failure rate of rotator cuff repair can exceed 50%. Important predictors for repair failure are preoperative fatty muscle infiltration and myotendinous retraction.

PURPOSE

To quantitatively assess the prognostic value of preoperative retraction of both the supraspinatus muscle and tendon for the outcome of supraspinatus repair.

STUDY DESIGN

Cohort study; Level of evidence, 3.

METHODS

In 33 shoulders with complete supraspinatus tendon ruptures subjected to arthroscopic repair, magnetic resonance imaging (MRI) scans taken preoperatively and after a mean follow-up of 24 months were studied. The exact position of the lateral extension of the supraspinatus muscle and of the tendon end was evaluated and correlated with the preoperative stage of fatty infiltration (Goutallier) and the failure rate of tendon repair.

RESULTS

The mean lengthening of the muscle and tendon end was -3 mm and 4 mm in the failed repairs (n = 19) and 14 mm and 8 mm in the successful repairs (n = 14). If the supraspinatus had preoperative Goutallier stages 2 to 3 and a tendon length of less than 15 mm, the failure rate was 92%, but if the tendon length was greater than 15 mm, the failure rate was only 33%. With Goutallier stages 0 to 1, the corresponding failure rates were 57% and 25%, respectively.

CONCLUSION

Rotator cuff repair lengthens the tendon, even if the repair fails. The possibility to lengthen the myotendinous unit is related to the preoperative length of the tendon. The combination of Goutallier grading and preoperative tendon length appears to be a more powerful predictor for the reparability of a tendon tear than Goutallier grading alone.

Revision rotator cuff repair

The management of patients with a failed rotator cuff repair is challenging. Revision arthroscopic repairs can be entertained in select patients when realistic outcomes are understood. Complete evaluation of the shoulder is needed to identify and treat potential confounding pain generators. The ability to determine if a recurrent tear is repairable is difficult, because there are no established criteria to make this determination. If a recurrent tear is found to be repairable, the results of the surgery are encouraging, although persistent limitations in shoulder function are common. Strategies to improve the rates of tendon healing should be used and include the use of stronger repair constructs, when possible, and implementation of a slower rehabilitation progression.

A multicenter randomized controlled trial comparing single-row with double-row fixation in arthroscopic rotator cuff repair

BACKGROUND

Controversy exists regarding the optimal technique for arthroscopic rotator cuff repair. The purpose of this multicenter, randomized, double-blind controlled study was to compare the functional outcomes and healing rates after use of single-row and double-row suture techniques for repair of the rotator cuff.

METHODS

Ninety patients undergoing arthroscopic rotator cuff repair were randomized to receive either a single-row or a double-row repair. The primary objective was to compare the Western Ontario rotator cuff index (WORC) score at twenty-four months. Secondary objectives included comparison of the constant and american shoulder and elbow surgeons (ASES) scores and strength between groups. Anatomical outcomes were assessed with magnetic resonance imaging (MRI) or ultrasonography to determine the postoperative healing rates.

RESULTS

Baseline demographic data including age (p = 0.29), sex (p = 0.68), affected side (p = 0.39), and rotator cuff tear size (p = 0.28) did not differ between groups. The WORC score did not differ significantly between groups at any time point (p = 0.48 at baseline, p = 0.089 at three months, p = 0.52 at six months, p = 0.83 at twelve months, and p = 0.60 at twenty-four months). The WORC score at each postoperative time point was significantly better than the baseline value. The Constant score, ASES score, and strength did not differ significantly between groups at any time point. Logistic regression analysis demonstrated that a smaller initial tear size and double-row fixation were associated with higher healing rates.

CONCLUSIONS

No significant differences in functional or quality-of-life outcomes were identified between single-row and double-row fixation techniques. A smaller initial tear size and a double-row fixation technique were associated with higher healing rates as assessed with ultrasonography or MRI.

LEVEL OF EVIDENCE

Therapeutic level I. See Instructions for Authors for a complete description of levels of evidence.

Recent advances in shoulder research

Shoulder pathology is a growing concern for the aging population, athletes, and laborers. Shoulder osteoarthritis and rotator cuff disease represent the two most common disorders of the shoulder leading to pain, disability, and degeneration. While research in cartilage regeneration has not yet been translated clinically, the field of shoulder arthroplasty has advanced to the point that joint replacement is an excellent and viable option for a number of pathologic conditions in the shoulder. Rotator cuff disease has been a significant focus of research activity in recent years, as clinicians face the challenge of poor tendon healing and irreversible changes associated with rotator cuff arthropathy. Future treatment modalities involving biologics and tissue engineering hold further promise to improve outcomes for patients suffering from shoulder pathologies.

Rotator cuff: biology and current arthroscopic techniques

The present article summarizes current trends in arthroscopic rotator cuff repairs focusing on the used repair technique, potential influencing factors on the results, and long-term outcome after reconstruction of the rotator cuff. Moreover, different treatment options for the treatment for irreparable rotator cuff ruptures were described, and the results of additional augmentation of the repairs with platelet-rich plasma were critically analyzed. Based on the current literature, double-row repairs did not achieve superior clinical results compared to single-row repairs neither in the clinical results nor in the re-rupture rate. Multiple factors such as age, fatty infiltration, and initial rupture size might influence the results. If the rupture is not repairable, various options were described including cuff debridement, partial repair, tuberoplasty, or tendon transfers. The additional augmentation with platelet-rich plasma did not reveal any significant differences in the healing rate compared to conventional rotator cuff repairs.

LEVEL OF EVIDENCE

IV.

The effect of platelet-rich fibrin matrix on rotator cuff tendon healing: a prospective, randomized clinical study

BACKGROUND

There is a strong need for methods to improve the biological potential of rotator cuff tendon healing. Platelet-rich fibrin matrix (PRFM) allows delivery of autologous cytokines to healing tissue, and limited evidence suggests a positive effect of platelet-rich plasma on tendon biology.

PURPOSE

To evaluate the effect of platelet-rich fibrin matrix on rotator cuff tendon healing.

STUDY DESIGN

Randomized controlled trial; Level of evidence, 2.

METHODS

Seventy-nine patients undergoing arthroscopic rotator cuff tendon repair were randomized intraoperatively to either receive PRFM at the tendon-bone interface (n = 40) or standard repair with no PRFM (n = 39). Standardized repair techniques were used for all patients. The postoperative rehabilitation protocol was the same in both groups. The primary outcome was tendon healing evaluated by ultrasound (intact vs defect at repair site) at 6 and 12 weeks. Power Doppler ultrasound was also used to evaluate vascularity in the peribursal, peritendinous, and musculotendinous and insertion site areas of the tendon and bone anchor site. Secondary outcomes included standardized shoulder outcome scales (American Shoulder and Elbow Surgeons [ASES] and L'Insalata) and strength measurements using a handheld dynamometer. Patients and the evaluator were blinded to treatment group. All patients were evaluated at minimum 1-year follow-up. A logistic regression model was used to predict outcome (healed vs defect) based on tear severity, repair type, treatment type (PRFM or control), and platelet count.

RESULTS

Overall, there were no differences in tendon-to-bone healing between the PRFM and control groups. Complete tendon-to-bone healing (intact repair) was found in 24 of 36 (67%) in the PRFM group and 25 of 31 (81%) in the control group (P = .20). There were no significant differences in healing by ultrasound between 6 and 12 weeks. There were gradual increases in ASES and L'Insalata scores over time in both groups, but there were no differences in scores between the groups. We also found no difference in vascularity in the peribursal, peritendinous, and musculotendinous areas of the tendon between groups. There were no differences in strength between groups. Platelet count had no effect on healing. Logistic regression analysis demonstrated that PRFM was a significant predictor (P = .037) for a tendon defect at 12 weeks, with an odds ratio of 5.8.

CONCLUSION

Platelet-rich fibrin matrix applied to the tendon-bone interface at the time of rotator cuff repair had no demonstrable effect on tendon healing, tendon vascularity, manual muscle strength, or clinical rating scales. In fact, the regression analysis suggests that PRFM may have a negative effect on healing. Further study is required to evaluate the role of PRFM in rotator cuff repair.

Rotator cuff repair augmented with endogenous fibrin clot

Despite recent technical advances, rotator cuff repair continues to have a high retear rate. Recent research focused on biologic augmentation of rotator cuff repair with platelet-rich plasma has shown mixed results, and use of an endogenous fibrin clot from either peripheral blood or bone marrow may have advantages over the use of platelet-rich plasma. This technique describes a method to make an endogenous fibrin clot and arthroscopically apply the fibrin clot to the superior surface of the rotator cuff repair site.

Midterm outcome after rotator cuff reconstruction

Rotator cuff tear is a common degenerative shoulder disorder that often requires surgical treatment. However, the correlation between the size of the tear and the functional results is somewhat controversial, which generates inconsistency among orthopaedic surgeons about the indications for and methods of rotator cuff reconstruction. Aims: The aim of the authors was to evaluate the midterm functional outcome after rotator cuff reconstruction and the possible connection between the results and the surgical technique or the postoperative ultrasound examination. In addition, recently published corresponding studies are also reviewed by the authors. Methods: Twenty-seven patients with full thickness rotator cuff tear were enrolled into the study who were treated either by arthroscopic (14 patients) or by open repair (13 patients) technique. Functional results were assessed using clinical tests. Ultrasound examination was also performed. Results: The average postoperative Constant Score was 73, the average DASH (Disabilities of the arm, shoulder and hand score) was 14. The Constant scores averaged 80 for the arthroscopic and 70 for the open group. Ultrasound examination showed partial or full thickness retear of the cuff in 40% of the cases. Conclusion: More than 70% of the patients had excellent or good results two years after the reconstruction. The change in the acromiohumeral distance or partial retear failed to affect the results significantly, but full thickness tear had an effect on them. Orv. Hetil., 2012, 153, 655–661.