Comparison of Knotless Versus Knot-Tying Suture Anchors for Arthroscopic Repair of Hip Labral Tears.

Background: Both knotless and knot-tying anchors are commonly employed in the arthroscopic repair of hip labral tears. Purpose: To compare the midterm clinical results of arthroscopic hip labral repair using knot-tying versus knotless suture anchors. Study Design: Cohort study; Level of evidence, 3. Methods: Patients who underwent arthroscopic hip labral repair between January 2017 and January 2021 and who had at least 2 years of follow-up were included. The patients were divided into 2 groups based on the suture anchor type: a 2.9-mm knotless suture anchor (knotless group) or a 1.8-mm knot-tying suture anchor (knot-tying group). All patients underwent femoroplasty for cam lesions and acetabular rim trimming for pincer lesions. The modified Harris Hip Score (mHHS), Hip Outcome Score-Sport-Specific Subscale (HOS-SSS), Hip Outcome Score-Activities of Daily Living (HOS-ADL), 12-item International Hip Outcome Tool (iHOT-12), and visual analog scale (VAS) for pain were administered both preoperatively and postoperatively. The consistency of the outcome scores was assessed using the minimal clinically important difference and Patient Acceptable Symptom State. The statistical significance between groups was evaluated using the Mann-Whitney test and quantile-based analysis of variance. Results: A total of 413 patients were included: 256 patients in the knotless group (median age, 35 years [interquartile range, 31-38 years]; median follow-up, 34 months) and 157 patients in the knot-tying group (median age, 34 years [interquartile range, 30-38 years]; median follow-up, 25 months). There were no significant differences in postoperative mHHS, HOS-ADL, or iHOT-12 scores between the 2 groups. However, there were significant differences, favoring the knotless group over the knot-tying group, in postoperative HOS-SSS (87 ± 2 vs 86 ± 1, respectively) and VAS pain (1 vs 2, respectively) scores (P < .0001 for both). Postoperative synovitis was found in significantly more patients in the knot-tying group than in the knotless group (17 vs 5, respectively; P = .01). Conclusion: In this study, patients who underwent arthroscopic hip labral repair with knotless suture anchors had slightly better postoperative HOS-SSS and VAS pain scores and a lower incidence of postoperative synovitis compared with patients who underwent repair with knot-tying suture anchors.

Satellite myoblast and mesenchymal stem cell injections decrease fatty degeneration after rotator cuff tear in rats.

Purpose: Rotator cuff (RC) tears cause fatty degeneration, aggravated by delayed treatment. Surgical repair alone cannot reverse fatty degeneration. It was aimed to test if local injections of satellite cell-derived myoblasts or satellite myoblasts (SM) from the deltoid region and mesenchymal stem cells (MSCs) from the subcutaneous abdominal fat pad would stimulate myogenesis and decrease adipogenesis in the rat model of fatty degenerated RC tear. Methods: A standardized RC tear surgery was performed on both shoulders of 24 Wistar albino rats at t = 0, and rats were followed for 8 weeks to create a chronic degeneration model. The animals were randomly divided into repair + SM and MSC (n = 12) or repair only (n = 12) groups. Transosseous repair with or without stem cell-based injection was performed on the right shoulder of all rats on week 8, with additional injections on weeks 9 and 10. The left shoulders were used as control. The animals were followed until week 14 for recovery. Results: Histological and histomorphometric analyses were performed in week 14. The repair + SM and MSC group had a significantly greater supraspinatus muscle mass than the repair only and control groups. The adipose tissue ratio was significantly lower in the repair + SM and MSC groups versus the repair only and control groups. Conclusion: Histologically, the repair + SM and MSC group had improved muscle and tendon organization. In treating chronically degenerated RC tear in a rat model, surgical repair combined with injections of SM and MSC improved fatty degeneration, tendon healing and myogenesis. Level of Evidence: Level III.

Biomechanical comparison of reverse offset-L osteotomy and chevron osteotomy in cadaveric hallux valgus surgery.

OBJECTIVE: Chevron osteotomy offers near-excellent clinical results and adequate stability at lower shift percentages, among the techniques used to correct hallux valgus deformity. This cadaveric study aimed to compare the Chevron osteotomy with the reverse offset-L osteotomy, which may provide a greater surface area and a more stable geometry to withstand higher cantilever forces at higher shift percentages. METHODS: Metatarsal bones obtained from 20 human cadavers with similar bone quality were divided into two groups: Chevron osteotomy was applied to the 1st group and reverse offset-L osteotomy was applied to the 2nd group. The load-to-failure, displacement in the y-axis, and total displacement values of both groups were compared statistically. Furthermore, bone densities were compared between the groups with computed tomography imaging. RESULTS: When outliers in both groups were excluded, a statistically significant difference was found in favor of reverse offset-L (143 ± 42 vs. 204 ± 51.2 N, p = 0.02) in terms of failure load. The groups were similar in terms of displacement on the y-axis and total displacement values. Bone densities were similar. CONCLUSION: The reverse offset-L osteotomy has been shown to withstand greater loads before failure compared to the standard Chevron osteotomy. This significant difference in load-to-failure may enable reverse offset-L to provide reliable stability in osteotomies performed in advanced HV cases requiring higher shifts.

Glenoid bone loss and Hill-Sachs width percentage score are useful to select optimal operation for the treatment of glenohumeral instability in overhead athletes: Arthroscopic Bankart repair with remplissage versus open Latarjet.

PURPOSE: Glenohumeral instability with combined bone lesion in contact and overhead athletes with subcritical bone loss is challenging to treat with high recurrent instability. Treatment options are arthroscopic Bankart repair with remplissage and Latarjet operations. However, there is no consensus on their effectiveness. This study aims to compare the clinical outcomes and return to sports after both operations and whether evaluating the glenoid bone loss and Hill-Sachs width to calculate the total bone loss can help determine the appropriate operation. METHODS: In this retrospective comparative analysis, 30 athletes who underwent index arthroscopic Bankart repair with remplissage (n = 16) or Latarjet procedure (n = 14) between 2017 and 2020 were included. Computed tomography (CT) and magnetic resonance imaging (MRI) were routinely performed. The quick Disabilities of the Arm, Shoulder and Hand (qDASH), American Shoulder and Elbow Surgeons (ASES), instability severity index (ISI) scores and range of motion (ROM) were recorded preoperatively and at a mean follow-up of 53 months (SD = 12). Follow-up included time-to-return sports, self-perceived sports performance level and complications/recurrent dislocations. RESULTS: Preoperative qDASH, ASES, ISI scores, ages and genders were similar. The Latarjet group had significantly larger glenoid bone loss, Hill-Sachs width and total bone loss (p < 0.01). Both groups had significant improvement in patient-reported outcomes (PROs) after the operations (p < 0.01). Athletes with a total bone loss <25% underwent arthroscopic Bankart repair with remplissage and total bone loss ≥25% underwent Latarjet procedure, and there were no differences between the groups in terms of postoperative PROs, ROM, time-to-return sports and performance. There were no re-dislocations. CONCLUSION: Arthroscopic Bankart repair with remplissage or Latarjet procedure can adequately address glenohumeral instability with combined bone lesions. Patients with total bone loss scores greater than or equal to 25 may particularly benefit from the Latarjet procedure, while the minimally invasive arthroscopic Bankart repair with remplissage can yield equally satisfying scores for total bone loss less than 25. LEVEL OF EVIDENCE: Level III.

Assessment of learning in simulator-based arthroscopy training with the diagnostic arthroscopy skill score (DASS) and neurophysiological measures.

PURPOSE: Virtual arthroscopic training has become increasingly popular. However, there is a lack of efficiency-based tracking of the trainee, which may be critical for determining the specifics of training programs and adapting them for the needs of each trainee. This study aims to evaluate and compare the measures obtained with a non-invasive neurophysiological method with The Diagnostic Arthroscopy Skill Score (DASS), a commonly used assessment tool for evaluating arthroscopic skills. METHODS: The study collected simulator performance scores, consisting of "Triangulation Right Hand", "Triangulation Left Hand", "Catch the Stars" and "Three Rings" and DASS scores from 22 participants (11 novices, 11 experts). These scores were obtained while participants underwent a structured program of exercises for the fundamentals of arthroscopic surgery training (FAST) and knee module using a simulator-based arthroscopy device. During the evaluation, data on oxy-hemoglobin and deoxy-hemoglobin levels in the prefrontal cortex were collected using the Functional Near-Infrared Spectroscopy (fNIRS) imaging system. Performance scores, DASS scores, and fNIRS data were subsequently analyzed to determine any correlation between performance and cortex activity. RESULTS: The simulator performance scores and the DASSPart2 scores were significantly higher in the expert group compared to the novice group (200.1 ± 28.5 vs 172.5 ± 48.9, p = 0.04 and 9.4 ± 5.6 vs. 5.4 ± 5.6 p = 0.02). In the expert group, fNIRS data showed a significantly lower prefrontal cortex activation during fundamental tasks in the FAST module, indicating significantly more efficient mental resource use. CONCLUSION: The analysis of cognitive workload changes during simulation-based arthroscopy training revealed a significant correlation between the trainees' DASS scores and fNIRS data. This correlation suggests the potential use of fNIRS data and DASS scores as additional metrics to create adaptive training protocols for each participant. By incorporating these metrics, the training process can be optimized, leading to more efficient arthroscopic training and better preparedness for clinical operations. LEVEL OF EVIDENCE: III.

Melatonin in preservation solutions prevents ischemic injury in rat kidneys.

Transplantation is lifesaving and the most effective treatment for end-stage organ failure. The transplantation success depends on the functional preservation of organs prior to transplantation. Currently, the University of Wisconsin (UW) and histidine-tryptophan-ketoglutarate (HTK) are the most commonly used preservation solutions. Despite intensive efforts, the functional preservation of solid organs prior to transplantation is limited to hours. In this study, we modified the UW solution containing components from both the UW and HTK solutions and analyzed their tissue-protective effect against ischemic injury. The composition of the UW solution was changed by reducing hydroxyethyl starch concentration and adding Histidine/Histidine-HCl which is the main component of HTK solution. Additionally, the preservation solutions were supplemented with melatonin and glucosamine. The protective effects of the preservation solutions were assessed by biochemical and microscopical analysis at 2, 10, 24, and 72 h after preserving the rat kidneys with static cold storage. Lactate dehydrogenase (LDH) activity in preservation solutions was measured at 2, 10, 24, and 72. It was not detectable at 2 h of preservation in all groups and 10 h of preservation in modified UW+melatonin (mUW-m) and modified UW+glucosamine (mUW-g) groups. At the 72nd hour, the lowest LDH activity (0.91 IU/g (0.63-1.17)) was measured in the mUW-m group. In comparison to the UW group, histopathological damage score was low in modified UW (mUW), mUW-m, and mUW-g groups at 10, 24, and 72 hours. The mUW-m solution at low temperature was an effective and suitable solution to protect renal tissue for up to 72 h.

Role of robotic approach for management of complicated jejunoileal diverticulosis - video vignette.

Jejunoileal diverticulosis (JID) is a rare condition with a reported incidence lower than 0.1% (1-3). Surgery is the definitive treatment for JID and can be considered to improve the patient's quality of life and to prevent further occurrence of severe symptoms (3, 4, 5). Minimally invasive approach facilitates postoperative recovery, lowers risks and improves outcomes in JID treatment (6). This article is protected by copyright. All rights reserved.