Anatomic Drivers of J-Sign Presence and Severity: If There Is a Jump, Look for a Bump.

Background: Medial patellofemoral ligament reconstruction is frequently indicated for recurrent lateral patellar instability. The preoperative presence and severity of a J-sign have been associated with poorer postoperative outcomes.

Purpose: To determine the underlying anatomic factors that contribute to the presence, severity, and jumping quality of the J-sign.

Comparison of Revision and Primary Osteochondral Allograft Transplantation at Midterm Follow-up: Patient Reported Outcomes, Survivorship, and Reoperation Rates.

Background: Previous studies have observed promising short-term outcomes after revision osteochondral allograft (OCA) transplantation. However, few studies have examined midterm outcomes after revision OCA transplantation.

Purpose: To examine midterm outcomes after revision OCA transplantation of the femoral condyle and evaluate reoperation and survivorship compared with a matched cohort of patients who underwent primary OCA transplantation.

Current Methods Used to Evaluate Glenoid Bone Loss: A Survey of Orthopaedic Surgeons.

Background: Evaluation of glenoid bone loss is critical in preoperative planning, as bone loss >13.5% has been associated with worse clinical outcomes. While 3-dimensional computed tomography (3D CT) and the Pico method have been the gold standard in bone loss evaluation, it is unclear how most orthopaedic surgeons evaluate for bone loss in practice.

Radiological Risk Factors for Osteochondral Fractures in Patients With First-Time and Recurrent Patellar Instability: Data From the JUPITER Cohort.

Background: Radiological risk factors for an osteochondral fracture (OCF) associated with patellar instability are rarely studied, particularly in patients with recurrent instability.

Purpose: To identify specific radiological characteristics that relate to the increased prevalence of OCFs associated with patellar instability.

Study Design: Case-control study; Level of evidence, 3.

Osteochondral Allograft Transplantation With Concomitant Meniscal Allograft Transplantation Improves Clinical Outcomes and Yields High Patient Satisfaction: A Systematic Review.

Purpose: To conduct a systematic review evaluating subjective patient-reported outcomes, reoperations, and graft failure after concomitant osteochondral allograft (OCA) transplantation and meniscal allograft transplantation (MAT).

Methods: A literature search was performed by querying the MEDLINE, Embase, and PubMed databases according to the 2020 Preferred Reporting Items for Systematic Reviews and Meta-analyses statement. The inclusion criteria were limited to peer-reviewed, English-language, Level I to IV studies with at least 10 patients that reported clinical outcomes and complications after OCA transplantation with concomitant MAT for osteochondral defects and meniscal deficiency with minimum 2-year follow-up.