Quantitative magnetic resonance imaging assessment of the infraspinatus and teres minor in massive rotator cuff tear and its significance in clinical outcome after rotator cuff repair.

BACKGROUND: Teres minor (TM) muscle hypertrophy in large to massive rotator cuff tears (RCTs) has been considered a compensatory change to atrophy of the infraspinatus (ISP). However, few reports have assessed its relation to the prognosis after rotator cuff repair. METHODS: A total of 139 patients who underwent arthroscopic repair of large to massive RCTs involving the ISP between January 2013 and December 2015 were retrospectively investigated. Occupational ratios of the ISP (OR_ISP) and TM (OR_TM) were measured by sagittal magnetic resonance imaging (MRI). Rotator cuff healing was evaluated by MRI 1 year postoperatively, and functional outcomes using the Simple Shoulder Test (SST) and Constant score and external rotator (ER) strength by isokinetic muscle performance test (IMPT) were measured. RESULTS: A total of 116 patients completed the MRI and IMPT at 1 year postoperatively, and functional scores were measured at least 2 years postoperatively. Of these, the repaired tendon had not healed in 34 patients (29%). There was a highly negative correlation between OR_ISP and OR_TM both pre- and postoperatively (Pearson correlation = -0.52 and -0.54, respectively). Preoperative OR_ISP was significantly higher in the healed than in the healing failure group (0.47 ± 0.10 vs. 0.41 ± 0.12, P = .02); however, postoperative OR_ISP and pre- and postoperative OR_TM were not. The preoperative OR_ISP cutoff value for healing was 0.46. For functional outcomes, only postoperative OR_ISP showed a statistical correlation with SST, Constant score (P = .04 and .03, respectively), and ER strength (P = .02). CONCLUSION: TM muscle hypertrophy in large to massive RCT appears to be a compensatory change in the progression of atrophy of the ISP muscle and was not a significant indicator of either better healing of the repaired rotator cuff tendon or better function. Only preoperative OR_ISP was an independent prognostic factor affecting rotator cuff healing after repair of large to massive RCTs.

Effects of Anxiety and Depression Measured via the Hospital Anxiety and Depression Scale on Early Pain and Range of Motion After Rotator Cuff Repair.

BACKGROUND: Preoperative anxiety and depression are independent predictors of clinical outcomes after arthroscopic rotator cuff repair. However, few studies have evaluated correlations between outcomes such as pain and range of motion (ROM) after arthroscopic rotator cuff repair and preoperative anxiety and depression. PURPOSE: To evaluate the effects of preoperative anxiety and depression, measured using the Hospital Anxiety and Depression Scale (HADS), on early pain and ROM after rotator cuff repair. STUDY DESIGN: Cohort study; Level of evidence, 2. METHODS: A total of 144 consecutive patients who underwent arthroscopic rotator cuff repair were enrolled and divided into 2 groups according to HADS scores: group A, those with a healthy psychological status (n = 103; anxiety ≤7 and depression ≤7), and group B, those with psychological distress (n = 41; anxiety ≥8 or depression ≥8). Clinical outcomes were assessed using the visual analog scale for pain (pVAS) and ROM at 3 and 6 months postoperatively and annually. RESULTS: There were no significant preoperative differences in age, sex, tear size, pVAS scores, and ROM. However, at 3 months postoperatively, group A showed significantly lower mean pVAS scores (2.2 ± 1.3 vs 3.4 ± 1.8, respectively; P = .001) and significantly higher mean forward flexion (146.4°± 23.0° vs 124.1°± 28.2°, respectively; P < .001) than group B, as well as significantly higher mean levels of internal rotation at the back (T11.5 ± 2.8 vs L1.9 ± 2.5, respectively; P < .001) and significantly higher mean external rotation (42.4°± 15.9° vs 35.2°± 16.8°, respectively; P = .019). At 6 months postoperatively, the mean pVAS score was still significantly lower in group A than in group B (0.8 ± 1.6 vs 1.8 ± 2.1, respectively; P = .016), but other ROM measurements had no significant differences. There was also no significant difference in clinical and functional outcomes at the final follow-up. CONCLUSION: Anxiety and depression negatively affected clinical outcomes after rotator cuff repair. Recovery from pain and of ROM after arthroscopic rotator cuff repair occurred more quickly in patients with a healthy psychological status. Therefore, assessments of preoperative psychological status should be emphasized to improve early clinical outcomes after arthroscopic rotator cuff repair.

Clinical Outcomes of Revision Arthroscopic Capsulolabral Repair for Recurrent Anterior Shoulder Instability With Moderate Glenoid Bone Defects: A Comparison With Primary Surgery.

BACKGROUND: The optimal revision surgery for failed primary arthroscopic capsulolabral repair (ACR) has yet to be determined. Revision ACR has shown promising results. PURPOSE: To compare the functional, strength, and radiological outcomes of revision ACR and primary ACR for anterior shoulder instability. STUDY DESIGN: Cohort study; Level of evidence, 3. METHODS: Between March 2007 and April 2017, a total of 85 patients underwent ACR (revision: n = 23; primary: n = 62). Functional outcome scores and positive apprehension signs were evaluated preoperatively, at 1 year, and then annually. Isokinetic internal and external rotation strengths were evaluated preoperatively and at 1 year after surgery. RESULTS: The mean follow-up was 36.5 ± 10.2 months (range, 24-105 months). There was no significant difference between the revision and primary groups in the glenoid bone defect size at the time of surgery (17.3% ± 4.8% vs 15.4% ± 5.1%, respectively; P = .197). At the final follow-up, no significant differences were found in the American Shoulder and Elbow Surgeons score (97.6 ± 3.1 vs 98.0 ± 6.2, respectively; P = .573), Western Ontario Shoulder Instability Index score (636.7 ± 278.1 vs 551.1 ± 305.4, respectively; P = .584), or patients with a positive apprehension sign (17.4% [4/23] vs 11.3% [7/62], respectively; P = .479) between the revision and primary groups. There was no significant difference between the revision and primary groups for returning to sports at the same preoperative level (65.2% vs 80.6%, respectively; P = .136) and anatomic healing failure at 1 year after surgery (13.0% vs 3.2%, respectively; P = .120). Both groups recovered external rotation strength at 1 year after surgery (vs before surgery), although the strength was weaker than in the uninvolved shoulder. In the revision group, a larger glenoid bone defect was significantly related to a positive apprehension sign (22.0% ± 3.8%) vs a negative apprehension sign (16.0% ± 3.2%; cutoff = 20.5%; P = .003). CONCLUSION: In patients with moderate glenoid bone defect sizes (10%-25%), clinical outcomes after revision ACR were comparable to those after primary ACR. However, significant glenoid bone loss was related to a positive remaining apprehension sign in the revision group. Surgeons should consider these findings when selecting their revision strategy for patients with failed anterior shoulder stabilization.

The effect of postoperatively applied far-infrared radiation on pain and tendon-to-bone healing after arthroscopic rotator cuff repair: a clinical prospective randomized comparative study.

BACKGROUND: The effects of far-infrared radiation (FIR) on the treatment of rotator cuff diseases remains unknown. We evaluated the safety and efficacy of FIR after arthroscopic rotator cuff repair with regard to postoperative pain and healing. METHODS: This prospective randomized comparative study included 38 patients who underwent arthroscopic rotator cuff repair due to a medium-sized tear. Patients were randomly divided into the FIR or control group (n = 19 per group). In the FIR group, FIR with an FIR radiator started 1 week postoperatively for 30 minutes per session twice daily. It lasted until abduction brace weaning at 5 weeks postoperatively. We assessed pain using a pain visual analogue scale (pVAS) and measured the range of motion (ROM) of the shoulder at 5 weeks, and 3 and 6 months, postoperatively. The anatomical outcome was evaluated using magnetic resonance imaging at 6 months postoperatively. RESULTS: At 5 weeks postoperatively, the average pVAS score was lower in the FIR group than in the control group (1.5 ± 0.8 vs. 2.7 ± 1.7; P = 0.019). At 3 months postoperatively, the average forward flexion was higher in the FIR group (151.6° ± 15.3° vs. 132.9° ± 27.8°; P = 0.045), but there was no significant difference at 6 months postoperatively. There was no significant difference in healing failure between the groups (P = 0.999). CONCLUSIONS: FIR after arthroscopic rotator cuff repair could be an effective and safe procedure to reduce postoperative pain, thereby facilitating rehabilitation and better ROM in the early postoperative period.