A recent Orthopaedic Surgery digest,
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Study Type: Retrospective matched cohort study (Level 3), mean ~10-year follow-up of a previously reported series.

Key Question: Does adding open femoral head-neck osteochondroplasty (OCP) to periacetabular osteotomy (PAO) improve long-term outcomes and reduce reoperation compared with PAO alone?

Key Findings:

• Patient-reported outcomes (mHHS, WOMAC), MCID/PASS attainment and clinical failure were similar between PAO+OCP (n=38) and PAO-only (n=42), P>.05.
• Reoperation was higher with PAO alone (33% vs 8%, P=.005); four reoperations were for secondary FAI (OCP ± labral repair). 10-year survivorship from reoperation: 72.9% vs 97.4%.
• THA conversion trended higher with PAO alone (14% vs 3%, P=.07, not significant).

Clinical Relevance: Supports considering concurrent OCP in dysplastic hips with demonstrable cam morphology, potentially sparing patients secondary surgery, relevant to NHS planning and resource use in young adult hip preservation.

Limitations: Small, retrospective, single-centre series with non-randomised allocation, so selection bias and confounding are likely, and the study is underpowered for THA conversion.

Study Type: Controlled laboratory cadaveric biomechanical study (n = 8 fresh-frozen knees).

Key Question: How do independent changes in medial and lateral posterior tibial slope (PTS) affect anterior tibial translation (ATT) and internal rotation (IR) under axial load?

Key Findings:

• Increasing lateral PTS by +10° significantly increased ATT (P = .012); increasing medial PTS had no effect (P > .99).
• IR was driven chiefly by delta PTS (lateral minus medial). At 0° flexion, a +10° change in delta PTS produced 7.6° more rotation (P = .015); the largest rotational differences correlated with opposing delta PTS values (r = 0.960).
• At 20° flexion, changing either individual slope by ±10° significantly altered rotation (P < .036).

Clinical Relevance: Supports considering lateral and medial slope separately, and the possibility of differential slope correction, in ACL-deficient or failed ACL reconstruction patients with anterior and rotational instability.

Limitations: Small specimen number under static axial load only, with no muscle forces or dynamic loading, so clinical translation is unproven.

Study Type: Retrospective single-centre cohort study (Level 3 evidence), n=181, aged 10–19 years.

Key Question: How common is bone loss at initial presentation in adolescents with anterior shoulder instability, and which factors predict bipolar bone loss?

Key Findings:

• 74.6% had bone loss on MRI; 34.3% had bipolar bone loss, 7.2% were off-track, and 41.4% had distance to dislocation (DTD) <10 mm. Among first-time dislocators, 69.2% had bone loss and 37.4% had DTD <10 mm.
• Bipolar bone loss was associated with older age, male sex, collision sport participation and ≥5 prior dislocations.
• Independent predictors: male sex (OR 14.20; P=.011) and ≥5 prior dislocations (OR 3.22; P=.026).

Clinical Relevance: Adolescents with first-time instability frequently have significant bone loss, so routine MRI assessment of glenoid and humeral bone loss and DTD before choosing isolated Bankart repair is warranted.

Limitations: Cross-sectional imaging analysis only, with no surgical or recurrence outcomes, so the claim that isolated Bankart repair may be insufficient is inferential.

Study Type: Controlled laboratory (preclinical) animal study, ovine model.

Key Question: Does autologous platelet-rich plasma-enriched chondral matrix implantation (PACI) plus intra-articular PRGF improve MRI-assessed repair of full-thickness femoral condyle chondral defects compared with Ringer lactate or hyaluronic acid injection?

Key Findings:

• Seven Merino sheep (14 stifles) had 8 mm full-thickness medial femoral condyle defects; the right stifle received PACI + PRGF, the left received a single injection of Ringer lactate or hyaluronic acid.
• At 18 months, PACI stifles had significantly higher MOCART 2.0 scores than both control groups, with better defect filling, integration and repair tissue architecture.
• PACI stifles also showed signal intensity closer to native cartilage and fewer subchondral changes. Effect sizes, p-values and per-group numbers were not reported in the abstract.

Clinical Relevance: Early-stage evidence only; it may inform future human trials of autologous cartilage repair but does not yet support changing UK practice for focal defects.

Limitations: Very small sample, with MRI as the sole outcome (no histology or functional data reported in the abstract). Controls were weak (injection only, not an established repair technique such as microfracture or ACI), and the paired design confounds treatment with limb side.

Study Type: Controlled laboratory (biomechanical) study using 27 cadaveric knees on a 6-DOF robotic system.

Key Question: Does a retensionable double-bundle inlay/onlay hybrid sMCL reconstruction restore native knee laxity better than a single-bundle inlay reconstruction?

Key Findings:

• sMCL sectioning significantly increased valgus and external rotation laxity versus native (P < .001).
• After cycling and retensioning, both double-bundle constructs restored stability significantly better than single-bundle (valgus P < .001; ER P < .05).
• Retensioned double-bundle valgus laxity was close to native (pooled difference 0.56°, 95% CI 0.05°–1.06°). The anterior-posterior tibial configuration showed no difference from native in ER (P = .836).

Clinical Relevance: May inform graft choice for chronic or high-grade MCL instability, where single-bundle techniques have not reliably restored native laxity; no clinical outcome data yet.

Limitations: Time-zero cadaveric model without biological healing, with no clinical outcomes or long-term follow-up, and the abstract does not state the number of knees per reconstruction group.

Study Type: Prospective single-cohort study (Level 3), n=100, minimum 5-year follow-up.

Key Question: Does age modify the relationship between preoperative synovial fluid biomarkers and long-term patient-reported outcomes after ACL reconstruction?

Key Findings:

• Increasing age was independently associated with lower preoperative synovial TIMP-1 (β = -0.0775; P = .014), moderated by symptom duration but not mediated by cartilage injury severity.
• Older age predicted worse 5–10-year PROs and lower likelihood of reaching MCID for pain, function and activity.
• After age adjustment, higher MIP-1β predicted worse function, MMP-3 greater pain, and TIMP-2 lower activity; higher bFGF predicted better function. Age interactions were significant for TIMP-1, TIMP-2 and MIP-1β.

Clinical Relevance: Preoperative biomarker prognostication may need age-specific interpretation, but this remains exploratory and not applicable to routine NHS practice.

Limitations: Modest sample size with multiple biomarker-outcome comparisons and no stated correction for multiplicity, raising false-positive risk (attrition and generalisability are not reported in the abstract).

Study Type: Prospective multicentre registry cohort study (Level 3), French Arthroscopic Society, with propensity-weighted regression.

Key Question: Does MCL injury status modify the association between ACL graft type (hamstring vs nonhamstring) and patient-reported outcomes after primary ACL reconstruction?

Key Findings:

• Nonhamstring grafts were associated with higher IKDC (β = 7.89; 95% CI 3.45–12.33), SKV (β = 8.87) and ACL-RSI (β = 6.15; CI 0.02–12.28, borderline); no difference in Tegner.
• Combined ACL-MCL injuries managed nonoperatively scored lower on IKDC than isolated ACL injuries (β = 10.41).
• Graft × MCL interaction was non-significant (operative MCL β = -7.02; CI -15.26 to 1.22; P = .095), so no evidence MCL status modified graft effect.

Clinical Relevance: Findings do not support avoiding hamstring autograft specifically in combined ACL-MCL injuries, though graft choice remains relevant for outcomes generally; this informs UK graft selection discussions.

Limitations: Only 489/722 (67.7%) had complete data, and the interaction analysis was likely underpowered (wide CIs), so a clinically meaningful effect modification cannot be excluded.

Study Type: Retrospective propensity score-matched cohort study (Level 3), single-centre/single-group series.

Key Question: Do interportal and T-type capsulotomy, both followed by capsular closure, differ in PROs, clinically significant outcome achievement or reoperation-free survival after hip arthroscopy at ≥2 years?

Key Findings:

• 52 interportal patients were matched 1:4 to 206 T-type patients (mean age 32.7 years; 85% female). Postoperative PROs (HOS-ADL, HOS-SSS, iHOT-12, PROMIS-PF/PI) did not differ (P≥.10).
• MCID (93.5% vs 92.8%), PASS (88.2% vs 83.0%) and SCB (78.4% vs 77.5%) achievement were similar. Reoperation-free survival was 98% in both groups.
• The only difference was a greater PROMIS-PI improvement with interportal capsulotomy (−15.8 vs −11.8; P=.03), though baseline PROMIS-PI was worse in that group.

Clinical Relevance: Supports choosing capsulotomy type by intraoperative visualisation needs rather than outcome concerns, provided the capsule is closed.

Limitations: Small interportal cohort and a retrospective design with matching on only age, sex and BMI leave scope for residual confounding (e.g. pathology, surgeon selection) and limited power for rare events such as reoperation.