Long-term follow-up of perianchor cyst formation after rotator cuff repair

Association of Lateral Extra-Articular Tenodesis With Improved Graft Maturity on MRI 2 Years After ACL Reconstruction With Quadriceps Tendon Autograft in Skeletally Immature Athletes

Background

Quadriceps tendon autograft (QTA) has recently gained popularity in the treatment of anterior cruciate ligament (ACL) ruptures in pediatric patients. The addition of lateral extra-articular tenodesis (LET) to an ACL reconstruction (ACLR) has been found to reduce the risk of ACL retear in high-risk patients.

Purpose

To (1) compare ACL graft maturity using signal intensity ratios (SIRs) on magnetic resonance imaging (MRI) scans in skeletally immature patients undergoing ACLR with QTA either with or without concomitant LET and (2) evaluate LET safety by calculating the physeal disturbance-related reoperation rate in the ACLR+LET group.

Study Design

Cohort study; Level of evidence, 3.

Methods

The records of patients aged ≤18 years who underwent ACLR between 2015 and 2021 were reviewed retrospectively. Patients undergoing ACLR with QTA who had open distal femoral and proximal tibial physes on MRI scans and a minimum 2-year follow-up data were included. SIR values were measured on sagittal MRI scans by averaging the signal at 3 regions of interest along the ACL graft and dividing by the signal of the posterior cruciate ligament at its insertion. Statistical analysis was performed to evaluate differences in SIR values at 6 months, 1 year, and 2 years postoperatively in patients who underwent ACLR alone versus ACLR+LET.

Results

Overall, 29 patients were included in the study: 16 patients in the ACLR+LET group and 13 patients in the ACLR-only group. There were no significant differences in SIR values between groups at the 6-month or 1-year postoperative timepoints. At 2 years postoperatively, the median SIR of the ACLR+LET group was significantly lower than that of the ACLR-only group on both univariate (1.33 vs 1.86, respectively, P = .0012) and multivariate regression analyses adjusting for both sex and surgical technique (β = -0.49 [95% CI, -0.91 to -0.05]; P = .029). There were no cases of reoperation for physeal disturbance in patients who underwent ACLR+LET.

Conclusion

The addition of LET to an ACLR with QTA was associated with lower average SIR values and thus improved graft maturity at 2 years postoperatively compared with ACLR alone in skeletally immature patients. The addition of LET to an ACLR was found to be safe in skeletally immature patients.

Biodegradable vs nonbiodegradable suture anchors for rotator cuff repair: a systematic review and meta-analysis

Purpose

The use of non-biodegradable suture anchors (NBSA) in arthroscopic rotator cuff repair (RCR) has increased significantly. However, several complications such as migration, chondral damage, revision, and imaging difficulties have been reported. Meanwhile, the effectiveness of biodegradable suture anchors (BSA) in overcoming such complications and achieving functional outcomes requires further study. Thus, we aim to compare the clinical outcomes and complications of RCR using BSA and NBSA using direct comparison studies.

Methods

Two independent reviewers conducted systematic searches in PubMed, Embase, Cochrane Library, and Web of Science from conception to September 2022. Using the RoB 2 and ROBINS-I tools, we assessed the included studies for bias. We applied GRADE to appraise our evidence. Our PROSPERO registration number is CRD42022354347.

Results

Six studies (two randomized controlled trials, one retrospective cohort, and three case-control studies) involving 423 patients were included (211 patients received BSA and 212 patients received NBSA). BSA was comparable to NBSA in forward flexion, abduction, external rotation, Constant-Murley score, and perianchor cyst formation (P = 0.97, 0.81, 0.56, 0.29, and 0.56, respectively). Retear rates were slightly higher while tendon healing was reduced in BSA compared to NBSA, but the differences were not significant (P = 0.35 and 0.35, respectively).

Conclusion

BSA and NBSA appear to yield similar shoulder functions and complications in rotator cuff repairs.

Rotator cuff repair with biodegradable high-purity magnesium suture anchor in sheep model

Background

Rotator cuff tear has become one of the diseases affecting people's living quality. Conventional anchor materials such as titanium alloy and poly-lactic acid can lead to postoperative complications like bone defects and aseptic inflammation. Magnesium (Mg)-based implants are biodegradable and biocompatible, with strong potential to be applied in orthopaedics.

Methods

In this study, we developed a high-purity (HP) Mg suture anchor and studied its mechanical properties and degradation behavior in vitro. Furthermore, we described the use of high-purity Mg to prepare suture anchor for the rotator cuff repair in sheep.

Results

The in vitro tests showed that HP Mg suture anchor possess proper degradation behavior and appropriate mechanical property. Animal experiment indicated that HP Mg suture anchor provided reliable anchoring function in 12 weeks and showed no toxic effect on animal organs.

Conclusion

In summary, the HP Mg anchor presented in this study had favorable mechanical property and biosecurity.

The translational potential of this article: The translational potential of this article is to use high-purity Mg to develop a degradable suture anchor and verify the feasibility of the application in animal model. This study provides a basis for further research on the clinical application of biodegradable high-purity Mg suture anchor.