Nonanatomic Horn Position Increases Risk of Early Graft Failures After Lateral Meniscal Allograft Transplantation.

Background: The cause of early graft failure within 1 year of meniscal allograft transplantation (MAT) remains unclear. The association of early failure with a nonanatomic horn position of the allograft after lateral MAT with the keyhole technique has never been evaluated.

Hypothesis: A nonanatomic horn position of an allograft would be a significant risk factor for a premature graft tear as compared with an anatomically positioned allograft.

Does discoid lateral meniscus have inborn peripheral rim instability? Comparison between intact discoid lateral meniscus and normal lateral meniscus.

Introduction: Little is known about peripheral rim instability (PRI) of adult discoid lateral meniscus (DLM). We compared PRI of the intact DLM (iDLM) to those of intact normal lateral meniscus (LM) in adult patients and also investigated whether there was any association between PRI and DLM tears.

Materials And Methods: We investigated PRI in 17 DLMs and 60 normal LMs without tears during arthroscopic surgery for medial compartmental pathologies between June 2012 and October 2015.

Meniscal Extrusion Does Not Progress During the Midterm Follow-up Period After Lateral Meniscal Transplantation.

Background: Meniscal extrusion is related to degeneration of the native knee joint. However, the clinical effect of the phenomenon after meniscal allograft transplantation (MAT) has not been clearly identified. Purpose/Hypothesis: The purpose of this study was to evaluate the change in meniscal extrusion in both the coronal and sagittal planes after lateral MAT through the midterm follow-up period.

Meniscal allograft subluxations are not associated with preoperative native meniscal subluxations.

Purpose: To determine the relationship between preoperative subluxation of the original menisci and postoperative graft subluxation after lateral meniscal allograft transplantation (MAT).

Methods: Forty patients who underwent isolated lateral MATs in meniscus-deficient knees with a low-grade chondral lesion (≤ICRS grade 2) were assessed. Lateral subluxation of the native meniscus before meniscectomy and those of remaining meniscal tissue before MAT were measured on mid-coronal MRI scans taken at each time point.

Revision Meniscal Allograft Transplantation in the Lateral Compartment: Disparate MRI and Clinical Outcomes During the Early Postoperative Period.

Background: Little is known about clinical outcomes after revision meniscal allograft transplantation (RMAT), and there are no studies on magnetic resonance imaging (MRI) evaluations during the early remodeling period.

Hypothesis: The objective imaging results, as determined by MRI evaluation, would be inferior to those of published data on primary meniscal allograft transplantations (MATs), although short-term clinical improvement would be achieved after RMAT.

Study Design: Case series; Level of evidence, 4.

Proper Cartilage Status for Meniscal Allograft Transplantation Cannot Be Accurately Determined by Patient Symptoms.

Background: Candidates for meniscal allograft transplantation (MAT) often already have a significant cartilage lesion when they present with a symptomatic knee. However, the level of symptoms required for MAT to be performed is poorly defined, leading to difficulties in selecting patients and the potential for further cartilage loss.

Purpose: To evaluate if various clinical evaluation scores reflect the articular cartilage status of the lateral compartment preoperatively in symptomatic, lateral meniscus-deficient knees.

Effectiveness of the Charleston night-time bending brace in the treatment of adolescent idiopathic scoliosis.

Background: Part-time or night-time bracing has been introduced to address the poor compliance and psychological burden of full-time bracing. The results of various bracing methods vary, however, due to a lack of consistent inclusion criteria and definitions of brace effectiveness. We have evaluated the effectiveness of the Charleston night-time bending brace in the treatment of adolescent idiopathic scoliosis based on the new standardized criteria proposed by the Scoliosis Research Society.

Results of isolated lateral meniscus allograft transplantation: focus on objective evaluations with magnetic resonance imaging.

Background: Although numerous studies have reported outcomes of meniscus allograft transplantation, only a few dealt with isolated procedures or employed objective evaluation methods.

Hypothesis: Isolated lateral meniscus allograft transplantation (LMAT) provides clinical improvements and favorable objective results in symptomatic lateral meniscus-deficient knees.

Study Design: Case series; Level of evidence, 4.