Anatomic Tunnel Placement Is Not Feasible by Transclavicular-Transcoracoid Drilling Technique for Coracoclavicular Reconstruction: A Cadaveric Study.

PURPOSE: To evaluate the feasibility of anatomic tunnel placement by a transclavicular-transcoracoid drilling technique and with reference to the coracoclavicular ligaments' insertional anatomy and their orientations. METHODS: We used 12 fresh-frozen human cadaveric shoulders (6 matched pairs; mean age, 70 years; age range, 51-82 years) to simulate intraoperative tunnel placement with the transclavicular-transcoracoid drilling technique. After both the conoid and trapezoid ligaments were identified, two 2.5-mm guide pins were inserted from the clavicle to the coracoid, passing the centers of the clavicular and coracoid insertions of the conoid and the trapezoid ligaments, in a collinear fashion to the orientation of both ligaments. The entry point of the drill at the clavicle and the exit point at the coracoid undersurface, as well as the tunnel orientations, were measured. Complications due to the procedure, including a breach of the bone cortex of the clavicle and/or coracoid process, were recorded. RESULTS: The transclavicular-transcoracoid drilling technique for anatomic conoid ligament tunnel placement resulted in a medial cortical breach at the coracoid process in 6 of 12 shoulders. In the remaining 6 shoulders without a breach, the distance of the exit point from the medial cortex of the inferior coracoid process was only 3.6 ± 4.3 mm. For anatomic trapezoid ligament tunnel placement, no medial cortex breaching at the coracoid process occurred. However, the distance of the exit point was 3.1 ± 4.2 mm, indicating an eccentric location to the medial cortex of the coracoid process, similar to the conoid ligament. CONCLUSIONS: This cadaveric study showed that anatomic tunnel placement by the transclavicular-transcoracoid drilling technique would not be feasible without breaching or almost breaching the medial cortex of the coracoid process. CLINICAL RELEVANCE: The transclavicular-transcoracoid drilling technique for CC ligament reconstruction may not reproduce the anatomy of the CC ligaments but may place the coracoid process at high risk of fracture during tunnel placement.

Clinical Outcome after Arthroscopic Capsular Release for Adhesive Capsulitis of the Shoulder.

BACKGROUND: This study was undertaken to evaluate the outcome of the arthroscopic capsular release for adhesive capsulitis of the shoulder. METHODS: This study retrospectively investigated thirty shoulders in 29 patients who presented with recalcitrant adhesive capsulitis and underwent arthroscopic treatments. Other than typical findings of adhesive capsulitis, combined pathologies in the glenohumeral joint and subacromial space were evaluated by arthroscopy. Clinical evaluations were performed using the Constant's score and ranges of motion (ROM) at preoperative, 6 months postoperatively and at the final follow-up. RESULTS: Our study included 17 women and 12 men with a mean age of 53.8 years (range, 34-74). Mean follow-up duration was 24 months (range, 12-40 months). Assessment of combined pathologies revealed that partial rotator cuff tear of less than 25% thickness, was most common (overall 83.3%; with bursal 57% and articular 23%). Subacromial synovitis and adhesion were also frequent (53.3%). The Constant score and ranges of motion significantly improved at the final follow-up, compared with preoperative levels. However, clinical results at 6 months postoperatively were found to be significantly inferior to those observed at the final follow-up (p≤0.001 for all factors). Functional impairment was the major complaint in 59.3% patients at the 6 months follow-up. CONCLUSIONS: Although arthroscopic capsular release yielded favorable outcome at the mean 24 months follow-up, pain and motion limitations at 6-month postoperatively persisted in more than 50% of our patients. While combined pathologies were commonly encountered during arthroscopy, although their effects on surgical outcome in adhesive capsulitis remains unclear in this study.

Clinical comparison of two different plating methods in minimally invasive plate osteosynthesis for clavicular midshaft fractures: A randomized controlled trial.

AIM: The aim of this study was to compare the clinical and radiographic outcomes between two different plating methods (superior vs. anteroinferior) in minimally invasive plate osteosynthesis (MIPO) for acute displaced clavicular shaft fractures. MATERIALS AND METHODS: A prospective, randomized controlled trial was performed in a single centre. Nineteen patients were treated with superior plating and 18 with anteroinferior plating using the MIPO technique. A 3.5-mm locking reconstruction plate was bent preoperatively and applied to either the anteroinferior or superior aspect of the clavicle through two separate incisions. The operating time, time to union, the proportional length difference, complications, and functional outcome of the shoulder joint were evaluated using the Constant score and the University of California Los Angeles (UCLA) score. RESULTS: There was no statistically significant difference in the Constant score and UCLA score. The mean time to union was 16.8 weeks for superior plating and 17.1 weeks for anteroinferior plating (p=0.866). The average operation time was 77.2min in superior plating and 79.4min in anteroinferior plating (p=0.491). One patient in the superior plating group showed plate failure. Despite no significant difference, one patient had nonunion in the superior plating group (p>0.999). CONCLUSIONS: From a clinical perspective, although MIPO with anteroinferior plating provides better outcomes especially in complications without statistically significant difference, both plating methods provided satisfactory clinical and radiographic outcomes. LEVEL OF EVIDENCE: Level I, a single-centre, prospective, randomized controlled trial.

Comparison between open plating versus minimally invasive plate osteosynthesis for acute displaced clavicular shaft fractures.

BACKGROUND: Current literatures describe good clinical outcomes of acute displaced fracture of clavicle treated with minimally invasive plate osteosynthesis (MIPO). But, there are little comparative data of the outcomes between open plating and MIPO techniques. We compared the outcomes of open plating and MIPO for treatment of acute displaced clavicular shaft fractures. MATERIALS AND METHODS: The author performed a retrospective review on a consecutive series of patients with clavicular shaft fracture who underwent open plating or MIPO. Fourteen patients were treated with open plating with interfragmentary screw fixation, and 19 were treated with the MIPO technique without exposing a fracture site itself. A superior plating method was applied to both groups. Patient demographics, clinical outcomes using Constant score and University of California Los Angeles (UCLA) shoulder score, operation time, union rate, complications, and radiographic evaluation were evaluated. RESULTS: There were no statistically significant differences in the demographic data, including patient's variables (age, gender, involved side, smoking, alcohol, and diabetic status) and fracture characteristics (trauma mechanism, distribution of fracture type, presence of polytrauma, and time from trauma to surgery) between the two groups. Mean operation time was 87.5 min in open plating and 77.2 min in MIPO (p=0.129). The mean time to union was 15.7 weeks in patients who underwent open plating and 16.8 weeks in patients who underwent MIPO (p=0.427). Although there was no significant difference, nonunion developed 1 case in MIPO while none was in open plating. Four patients in open plating had skin numbness (none in MIPO, p=0.024). There was no significant difference in the Constant score and UCLA score of the two surgical methods. CONCLUSION: This study showed that both open plating with interfragmentary screw fixation (Open plating) and minimally invasive plate osteosynthesis (MIPO) are equally effective and safe treatment methods for acute displaced clavicle shaft fracture.

Subscapularis Tendon Repair Using Suture Bridge Technique.

The subscapularis tendon plays an essential role in shoulder function. Although subscapularis tendon tears are less common than other rotator cuff tears, tears of the subscapularis tendon have increasingly been recognized with the advent of magnetic resonance imaging and arthroscopy. A suture bridge technique for the treatment of posterosuperior rotator cuff tears has provided the opportunity to improve the pressurized contact area and mean footprint pressure. However, suture bridge fixation of subscapularis tendon tears appears to be technically challenging. We describe an arthroscopic surgical technique for suture bridge repair of subscapularis tendon tears that obtains ideal cuff integrity and footprint restoration. Surgery using such a suture bridge technique is indicated for large tears, such as tears involving the entire first facet or more, tears with a disrupted lateral sling, and combined medium to large supraspinatus/infraspinatus tears.

Arthroscopic Partial Repair of Irreparable Rotator Cuff Tears: Preoperative Factors Associated With Outcome Deterioration Over 2 Years.

BACKGROUND: Arthroscopic partial repair is a treatment option in irreparable large-to-massive rotator cuff tears without arthritic changes. However, there are indications that arthroscopic partial repair does not yield satisfactory outcomes. PURPOSE: To report the clinical and radiographic results of arthroscopic partial repairs in patients with irreparable large-to-massive cuff tears. In addition, an analysis was performed regarding preoperative factors that may influence patient outcomes and patient-rated satisfaction over time. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: From 2005 to 2011, a total of 31 patients who underwent arthroscopic partial repair for irreparable large-to-massive cuff tears were retrospectively evaluated. Partial repair was defined as posterior cuff tissue repair with or without subscapularis tendon repair to restore the transverse force couple of the cuff. Pain visual analog scale (PVAS), questionnaire results (American Shoulder and Elbow Surgeons [ASES] and Simple Shoulder Test [SST]), and radiographic changes (acromiohumeral distance and degenerative change) were assessed preoperatively, at first follow-up (roughly 1 year postoperatively), and at final follow-up (>2 years postoperatively). Patients rated their satisfaction level at each postoperative follow-up as well. Preoperative factors that might influence outcomes, such as patient demographics, tear size, and fatty infiltration, were investigated. RESULTS: The preoperative, first follow-up, and final follow-up results for mean PVAS (5.13, 2.13, and 3.16, respectively) and questionnaires (ASES: 41.97, 76.37, and 73.78; SST: 3.61, 6.33, and 6.07, respectively) improved significantly (all P < .05). Radiographic evaluation showed no difference compared with preoperative status. Nevertheless, patient-rated satisfaction at final evaluation was inferior: 16 good responses ("very satisfied" and "satisfied") and 15 poor responses ("rather the same" and "dissatisfied"). Despite initial improvements in both groups (P < .05), patients with poor satisfaction demonstrated statistically significant deterioration in mean PVAS (from 2.07 to 4.67), questionnaire scores (ASES: from 74.56 to 59.80; SST: from 5.11 to 3.81), and acromiohumeral distance (from 7.19 to 5.06 mm) between the first and final follow-up (all P < .05). Patients with good satisfaction showed no significant difference or they improved (P > .05) from the first to the final follow-up. Among preoperative factors, fatty infiltration of the teres minor was identified as the only statistically significant factor affecting patient-rated satisfaction (P = .007). CONCLUSION: This study showed that arthroscopic partial repair may produce initial improvement in selected outcomes at 2-year follow-up. However, about half of the patients in the study were not satisfied with their outcomes, which had deteriorated over time. Preoperative fatty infiltration of the teres minor was the only factor that correlated with worse final outcomes and poor satisfaction after arthroscopic partial repair.

Arthroscopic distal clavicle resection in symptomatic acromioclavicular joint arthritis combined with rotator cuff tear: a prospective randomized trial.

BACKGROUND: The treatment of symptomatic acromioclavicular joint (ACJ) injury in the rotator cuff (RC) tear has not been well clarified. PURPOSE: To compare the clinical results between patients who had distal clavicle resection (DCR) and those who did not during RC repair. STUDY DESIGN: Randomized controlled trial; Level of evidence, 1. METHODS: From August 2008 to December 2009, a total of 56 consecutive patients (58 shoulders) were included. All patients had either a full-thickness or high-grade (>50%) RC tear, ACJ tenderness, arthritic change visible on plain radiographs, and a positive ACJ lidocaine injection test the day before surgery. Patients were randomized into 2 groups: DCR and RC repair (DCR+RCR group) and RC repair only (isolated RCR). Evaluation was performed preoperatively, at 6 months postoperatively, and at a final follow-up a minimum of 24 months postoperatively using the American Shoulder and Elbow Surgeons (ASES) score, the Constant shoulder score, range of motion examination, and pain visual analog scale (VAS). RESULTS: After simple randomization, 26 shoulders were allocated in the DCR+RCR group, and 32 were placed in the isolated RCR group. Five shoulders in the DCR+RCR group and 6 in the isolated RCR group were excluded from analysis due to loss of follow-up. Therefore, the evaluation was performed for 21 shoulders in the DCR+RCR group and 26 shoulders in the isolated RCR group. The mean follow-up period was 44.2 months in the DCR+RCR group and 44.0 months in the isolated RCR group. There were no differences in age, sex, symptom duration, RC tear size, or preoperative ASES, Constant, and VAS scores between the 2 groups (P > .05). At final follow-up, the ASES, Constant, and VAS scores were significantly improved in both groups (P < .001). There were no differences in ASES, Constant, and VAS scores between the 2 groups at final follow-up (P > .05), and there was no difference in residual ACJ tenderness (7 in the DCR+RCR group and 5 in the isolated RCR group) between the 2 groups (P = .270). CONCLUSION: There was no difference in the clinical evaluations between the combined arthroscopic DCR and RCR group and the isolated RCR group at a minimum 24-month follow-up. Arthroscopic DCR should be carefully considered in patients who have symptomatic ACJ arthritis with RC tears.

Arthroscopic all-intra-articular decompression and labral repair of paralabral cyst in the shoulder.

BACKGROUND: The purpose of this study was to report the outcomes of all-intra-articular arthroscopic decompression and labral repair in patients with symptomatic paralabral cysts. METHODS: From 2005 to 2011, 20 consecutive cases of symptomatic paralabral cysts were included in this study. All surgical procedures were conducted with intra-articular arthroscopic decompression by use of a probe through the site of labral tear for cyst evacuation and suture anchor repair for the associated posterosuperior labrum. Clinical scores and magnetic resonance imaging (MRI) were obtained preoperatively and at follow-up. MRI was used to evaluate the size and segmentation of the cyst and the presence of the labral tear. RESULTS: MRI revealed paralabral cysts in association with labral tears in all cases. Cysts were extended in the spinoglenoid notch with a mean size of 2.5 × 2.6 × 2.2 cm on MRI. Cysts were nonsegmented in 5 cases (25%) and had multiple segments in 15 cases (75%). Mean follow-up was 42.8 ± 21.22 months. The mean visual analog scale score for pain, the American Shoulder and Elbow Surgeons score, and the Simple Shoulder Test score significantly improved at the last follow-up (P < .001, P < .001, and P = .001, respectively). The postoperative MRI study performed at a mean of 6 months for 18 of 20 cases (90%) revealed complete cyst removal. The satisfaction level with surgery was good to excellent in 18 patients, fair in 1 patient, and poor in 1 patient. No complication was related to the surgical procedure. CONCLUSION: Arthroscopic all-intra-articular decompression and labral repair of paralabral cyst can be a simple and effective treatment, regardless of segmentation or size. It also resulted in complete removal of the cyst at a mean of 6 months postoperatively as revealed by MRI. An additional subacromial procedure might not be necessary for complete decompression.

Intra-articular injection of hyaluronate versus corticosteroid in adhesive capsulitis.

The goal of this study was to prospectively compare the early clinical results of intra-articular injection of hyaluronate or corticosteroid in patients with idiopathic adhesive capsulitis. The authors' hypothesis was that there would be no difference between groups. Sixty-eight patients with idiopathic adhesive capsulitis were equally randomized to receive either corticosteroid or hyaluronate injection. All patients underwent standard physical examination and magnetic resonance imaging. Intra-articular injection was performed through an anterior approach by the same orthopedic surgeon without image guidance. Patients were followed up 2 and 12 weeks after completion of the injection. The primary outcome was the Constant score at week 12. Secondary outcomes included the visual analog scale (VAS) pain score, the American Shoulder and Elbow Surgeons (ASES) score, and range of motion at each time point. No significant differences were noted in preoperative demographic features or baseline shoulder function between groups. After treatment, no significant differences were noted in early clinical outcomes (at weeks 2 and 12) with VAS, ASES, and Constant scores between groups (all P>.05). Evaluation of range of motion showed no difference in forward elevation or external rotation at each time point. Internal rotation was significantly lower at week 2 in the hyaluronate group compared with the corticosteroid group (P=.015). Internal rotation improved at week 12, with no significant difference between groups. Patients treated with intra-articular injection of hyaluronate and corticosteroid for idiopathic adhesive capsulitis showed significant improvement in early clinical scores and range of motion without significant differences between groups.

Knot impingement after rotator cuff repair: is it real?

PURPOSE: The purpose of this study was to compare morphologic features of the acromion after 2 different repair methods (single-row [SR] repair with a minimum of 4 knots and suture-bridge [SB] repair with minimal knots) in medium to large rotator cuff tears. METHODS: From May 2005 to July 2012, 1,693 rotator cuff repairs were performed, among them medium to large tears requiring more than 2 anchors for repair; those who had 6-month postoperative magnetic resonance imaging (MRI) scans were included (221 shoulders). They were divided into 2 groups; group A (SR repair) and group B (SB repair). Acromial morphologic characteristics were evaluated using MRI 6 months postoperatively. An acromial defect was defined as an irregular defect or erosion on the flat acromion. Clinical measurements were performed using the American Shoulder and Elbow Surgeons (ASES) score, Constant score, visual analogue scale (VAS) pain score, and range of motion (ROM). RESULTS: Erosion in the acromion was observed in 2 of 118 patients (1.7%) in group A and in 1 of 103 (1%) patients in group B. There was no statistically significant difference between the 2 groups (P = .796). A statistically significant improvement was observed in the clinical scores measured (P = .0043). ROM was not fully recovered to the preoperative level at 6 months postoperatively. Acromioplasty was performed in 2 of 3 patients with acromial erosion. There was acromial erosion in one patient in group A without performing subacromial decompression. CONCLUSIONS: Our study showed that there was no difference in acromial erosion in high-profile knots made by an SR compared with double-row (DR) SB low-profile repairs. LEVEL OF EVIDENCE: Level III, retrospective comparative study.

Effect of immobilization without passive exercise after rotator cuff repair: randomized clinical trial comparing four and eight weeks of immobilization.

BACKGROUND: While animal studies have shown better healing with a longer duration of protection without motion exercise after rotator cuff repair, supporting clinical studies are rare. The purpose of this study was to assess the effect of immobilization following rotator cuff repair and to determine whether there was any difference in clinical outcome related to the duration of immobilization. METHODS: One hundred patients who underwent arthroscopic single-row repair of a posterosuperior rotator cuff tear (mean, 2.3 cm in the coronal-oblique plane and 2.0 cm in the sagittal-oblique plane) were prospectively randomized to be treated with immobilization for four or eight weeks. During the immobilization period, no passive or active range-of-motion exercise, including pendulum exercise, was allowed. According to the intention-to-treat protocol and full analysis set, eighty-eight patients were evaluated clinically and with magnetic resonance imaging postoperatively, after exclusion of twelve patients without postoperative clinical evaluation. Ranges of motion, clinical scores, and retear rates were compared between the four and eight-week groups. Ninety-eight patients were contacted by telephone at a mean of thirty-five months to investigate the clinical outcomes. RESULTS: The mean duration of immobilization was 4.1 weeks in the four-week group and 7.3 weeks in the eight-week group. There were nine full-thickness retears (10%), and 89% of the patients rated their result as excellent or good. There were five full-thickness retears in the four-week group and four in the eight-week group (p = 0.726). At the time of final follow-up, the two groups showed no differences in range of motion or clinical scores. However, the proportion showing stiffness was higher in the eight-week group (38% compared with 18%, p = 0.038). CONCLUSIONS: Eight weeks of immobilization did not yield a higher rate of healing of medium-sized rotator cuff tears compared with four weeks of immobilization.

Clinical and radiologic results of arthroscopic biceps tenodesis with suture anchor in the setting of rotator cuff tear.

BACKGROUND: The purpose of this study was to report clinical and radiologic results of arthroscopic biceps tenodesis with 1 suture anchor in rotator cuff tear patients. METHODS: During a 2-year period, 84 consecutive patients (45 men; 39 women) who underwent arthroscopic tenodesis were evaluated retrospectively. Mean age was 58 years. The primary indication for surgery was rotator cuff tear in 96.4%. Tenodesis was performed with 1 suture anchor placed in the bicipital groove with 2 knots, 1 lasso-type and 1 that pierced the tendon. At final follow-up at a mean of 33.2 months, visual analog scale pain (pain-VAS) score, shoulder scores (American Shoulder and Elbow Surgeons [ASES] and Constant score), Popeye deformity (PD), anterior arm pain, and elbow flexion power were evaluated. Postoperative magnetic resonance images were evaluated in 60 patients to determine the integrity of the tenodesis and the location of the suture anchor. RESULTS: The average pain-VAS decreased from 5.3 to 1.4 (P < .001). ASES and Constant scores significantly increased, from 42.9 and 56.2 to 85.2 and 82.5, respectively. PD occurred in 11 patients (12.9%), and 2 (2.3%) had self-consciousness; however, no patients complained about the deformity and the PD did not correlate with poorer clinical scores. Six patients (7.1%) complained of anterior cramping pain. Elbow flexion power was similar compared with the contralateral side. In postoperative magnetic resonance imagine analysis, 15 patients (25%) showed distal migration of tenodesed biceps tendon, although only 6 (7.1%) had clinical PD. Postoperative clinical outcomes were not influenced by the location of the suture anchor within the bicipital groove. CONCLUSIONS: Arthroscopic biceps tenodesis with 1 suture anchor resulted in good clinical outcomes at 2 years postoperatively. PD was seen in 12.9% of the patients.

Arthroscopic suture anchor tenodesis: loop-suture technique.

With advancements in arthroscopic surgery, arthroscopic biceps tenodesis with suture anchor recently has been reported to be a reasonable option for the treatment of biceps pathologies, especially for those that are symptomatic or accompanied by a rotator cuff tear. We introduce our technique of arthroscopic biceps tenodesis with suture anchor that we call the loop-suture technique, which is constructed with 1 loop strand and another sutured strand. This technique can help to improve biceps grip and simultaneously minimize longitudinal splitting of the tendon. In addition, it is relatively simple and can be performed with the use of conventional devices and arthroscopic portals used for rotator cuff repair, without the formation of additional portals or a separate incision for the tenodesis.

Inferior anchor cortical perforation with arthroscopic Bankart repair: a cadaveric study.

PURPOSE: The aims of this study were to evaluate the incidence of anchor penetration of the far cortex of the glenoid neck after arthroscopic Bankart repair and to compare the biomechanical properties of anchors in the 4- and 5:30- to 6-o'clock positions on the glenoid. METHODS: Twelve (6 matched pairs) fresh-frozen human cadaveric shoulders were used to simulate arthroscopic Bankart repair in the lateral decubitus position. The most inferior anchor (5:30 to 6 o'clock) and that above it (4 o'clock) were inserted via the anteroinferior portal on the glenoid using the standard technique. After both anchor insertions, anchor perforation of the glenoid far cortex was identified. Biomechanical properties were measured to determine cyclic displacement of anchors at 100 and 500 cycles, stiffness, yield load, and ultimate failure strength. RESULTS: All 12 suture anchors (100%) at 5:30 to 6 o'clock penetrated throughout the far cortex, whereas only 4 anchors (33%) at 4 o'clock did so (P = .005). The mean distance the anchor tip traveled into far cortex was significantly longer at 5:30 to 6 o'clock than at 4 o'clock (6.8 ± 1.6 mm v 2.0 ± 1.6 mm, P = .001). In terms of mechanical strength, anchors at 5:30 to 6 o'clock had greater 100- and 500-cycle mean displacements than those at 4 o'clock (3.0 ± 0.5 mm v 2.5 ± 0.3 mm, P = .018 for 100 cycles; 3.5 ± 0.7 mm v 2.8 ± 0.3 mm, P = .018 for 500 cycles), although no differences in ultimate failure strength after cyclic loading were found between 2 positions (133.4 ± 40.3 and 133.7 ± 29.2 N, respectively; P = .985). CONCLUSIONS: For arthroscopic Bankart repair, insertion of the most inferior anchor via the anteroinferior portal with standard technique, in the lateral decubitus position, carries a high risk of perforating the inferior far cortex of the glenoid (100% in our study). This may result in mechanical weakness of the most inferior repair specifically in the early postoperative period. CLINICAL RELEVANCE: Perforation of the glenoid far cortex by the most inferior anchor and its mechanical weakness should be taken into consideration. Further study is needed to improve surgical technique to place the most inferior anchor in an optimal position by arthroscopy.

Clinical and magnetic resonance imaging results of arthroscopic full-layer repair of bursal-side partial-thickness rotator cuff tears.

BACKGROUND: Partial rotator cuff tears are being diagnosed more often because of high-resolution magnetic resonance imaging (MRI). Articular-side partial tears are much more common than bursal-side tears, and all-inside or PASTA repairs that preserve the bursal tissue have gained popularity. In contrast, there have been few reports about preserving the articular tissue during bursal tear repair. PURPOSE: To report clinical and radiological results of bursal-side partial-thickness rotator cuff tear (PTRCT) repair with preservation of as much of the intact articular-side tendon as possible. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: From May 2006 to March 2008, 109 patients with PTRCT underwent arthroscopic repair. Among them, 38 consecutive patients who received a full-layer repair on the bursal side for greater than 50% thickness PTRCT were retrospectively evaluated. All repairs were performed with a technique that preserved intact articular fibers. To assess the outcome, pain visual analog scale (PVAS), American Shoulder and Elbow Surgeon (ASES) score, and Constant score were evaluated at final follow-up. Postoperative MRI at least 6 months after surgery was evaluated for repair integrity. RESULTS: All 38 patients (21 men and 17 women) were available for final follow-up. The mean age at surgery was 50.8 years (range, 30-58 years), and the mean follow-up time was 26.9 months (range, 24-41 months). There were 21 right shoulders and 17 left shoulders, for which the mean time from the onset of symptoms to surgery was 47.0 months (±83.3 months). The PVAS improved from 5.2 (±2.5) to 1.6 (±1.5), and mean ASES and Constant scores improved from 53.1 (±20.4) and 59.9 (±15.3) to 87.2 (±9.4) and 83.2 (±12.0), respectively. Postoperative MRI was available in 33 patients at a mean 8.2 months after surgery. Twenty-nine shoulders (87.9%) had an intact repaired tendon, while 3 patients had shown partial-thickness delaminated retears, and 1 patient demonstrated a full-thickness retear on postoperative MRI. CONCLUSION: For bursal-side PTRCT, clinical outcomes and tendon healing showed good results at a minimum 2 years after surgery, with minimal damage to intact articular tendon fibers on postoperative MRIs.

Prospective randomized clinical trial of single- versus double-row suture anchor repair in 2- to 4-cm rotator cuff tears: clinical and magnetic resonance imaging results.

PURPOSE: The purpose of this study was to compare the clinical outcomes and the retear rates of arthroscopic single-row (SR) and double-row (DR) suture anchor repair in 2- to 4-cm rotator cuff tears. METHODS: From 2005 to 2007, 71 patients with a 2- to 4-cm rotator cuff tear (proven by arthroscopy) were prospectively randomized to SR and DR repair groups. Of these patients, 62 (31 in each group) were available for evaluation at final follow-up. Demographic data, clinical scores, mean surgical times, and patient satisfaction were compared. Retear rates and clinical scores were also analyzed for 47 patients who underwent follow-up magnetic resonance imaging. RESULTS: Comparisons of demographic data, tear size on preoperative magnetic resonance imaging, global fatty degeneration index, and concomitant procedures showed no differences between the SR and DR groups. Preoperative clinical scores were significantly improved postoperatively in both groups. No intergroup differences in pain visual analog scale, American Shoulder and Elbow Surgeons, Constant, or University of California, Los Angeles scores were found at final follow-up. Only mean surgical time was significantly different between the 2 groups. In the SR group, there were 4 full-thickness retears and 11 partial-thickness retears, whereas in the DR group, there were 6 full-thickness retears and 1 partial-thickness retear. However, despite numerical differences, these differences were not statistically different. Statistically, there were no significant differences both in full-thickness retear (P = .999) and retear including partial-thickness tear between the 2 groups (P = .124). CONCLUSIONS: This study indicates that the clinical results and retear rates of DR repair with 1 additional medial suture anchor were not significantly different from those of SR repairs with 2 lateral suture anchors in patients with medium to large rotator cuff tear. LEVEL OF EVIDENCE: Level I, randomized controlled trial.

A comparative study of the posterolateral and anterolateral approaches for isolated acetabular revision.

PURPOSE: Although isolated revision of the acetabular component has become an increasingly common option for revision hip surgery, opinions differ regarding the ideal surgical approach for reducing postoperative instability. The purpose of this study was to compare the clinical and radiographic results of isolated acetabular revision performed using a posterolateral and an anterolateral approach. MATERIALS AND METHODS: The authors retrospectively compared the clinical and radiographic results of isolated acetabular revision performed in 33 hips using a posterolateral approach with those performed in 36 hips using an anterolateral approach. All procedures were performed by a single surgeon and all patients received the same postoperative protocol. Mean duration of follow-up was 4.6 years (range 2-13.2). RESULTS: Mean postoperative Harris hip scores were similar in the posterolateral and anterolateral groups (86.5 and 87.2 points, respectively). In the entire series of 69 hips, 6 (9%) underwent re-revision of the acetabular component because of aseptic cup loosening in 4, recurrent dislocation in 1, and deep infection in 1. No significant difference was found between the two groups with respect to complication or re-revision rates, but the dislocation rate in the anterolateral approach group was significantly lower than that in the posterolateral group (0 vs. 12%, p = 0.047). CONCLUSION: Isolated acetabular revision performed using an anterolateral approach seems to be the more viable option in selected patients, and in particular, it has a significantly lower postoperative dislocation rate than posterolateral acetabular revision.

The diagnostic value of needle biopsy for musculoskeletal lesions.

The purpose of this study was to assess the diagnostic value of imaging-guided core needle biopsy for the diagnosis of musculoskeletal lesions. Between 2004 and 2007, 309 biopsies (ultrasound 151, computed tomography 89, and fluoroscopy 69) were included. There were 142 soft tissue and 167 bony lesions. Diagnostic yields and accuracies were assessed using the chi-square test or Fisher's exact test with Bonferroni's correction when necessary. Overall diagnostic yield was 90.6% for all 309 lesions (bone 91.6% vs. soft tissue 89.3%, p = 0.5125). The diagnostic accuracy of the 185 core needle biopsies, which were confirmed by definitive surgical biopsies, was 84.3% (bone 88.9% vs. soft tissue 79.1%, p = 0.0669). The yields of homogenous bone tumours (96.8%) were not significantly higher than those of bone tumours with a heterogenic architecture (86.4%, p = 0.0794). The difference between accuracies for homogenous bone tumours (89.1%) and heterogenous bone tumours (85.0%) was not significant (p = 0.6930). However, for soft tissue tumours, homogenous tumours had a significantly higher diagnostic yield than heterogenous tumours (97.5% vs. 81.4%, p = 0.0036). Diagnostic accuracy for homogenous tumours was also significantly higher than that for heterogenous soft tissue tumours (94.4% vs. 60.6%, p < 0.0001). The image-guided percutaneous needle biopsy of musculoskeletal lesions is a safe and effective procedure if it is performed selectively in soft tissue tumours with homogenous architectures.

Analysis of the patellofemoral congruence angle according to the rotational alignment of the femoral component in navigation-guided TKA.

The relative femoral resection plane from the posterior condylar axis was determined by the navigation system. The investigators found that there was a relatively variable range of femoral component rotation intraoperatively (0 degrees - 6 degrees) and attempted to determine whether this would affect postoperative patellofemoral congruence. Forty-six varus knees from 34 patients were included in the study; group 1 (15 knees) with 0 degrees or 1 degrees and group 2 (31 knees) with 3 degrees to 6 degrees . The mean (P = .855) and percentage of abnormal values (patellofemoral congruence angle <16 degrees) (P = .193) in preoperative radiographs showed no significant differences between the two groups. In postoperative findings, the mean of patellofemoral congruence angles in group 1 (20.5 degrees) showed a higher tendency than that in group 2 (14.1 degrees), but no statistically significant difference between two groups (P = .089). In conclusion, there was no statistically significant difference in patellofemoral congruence between 2 groups.