Fatty Infiltrate of the Lumbar Multifidus Muscles Predicts Return to Play in Young Athletes With Extension-Based Low Back Pain.

Objective: To evaluate the predictive value of fatty infiltrate of the lumbar multifidus muscles (LMM) for return to play in young athletes with extension-based low back pain (EB LBP).

Design: Retrospective cohort study.

Setting: Hospital-based sports medicine practice.

Ultraporous β-tricalcium phosphate alone or combined with bone marrow aspirate for benign cavitary lesions: comparison in a prospective randomized clinical trial.

Background: Ultraporous β-tricalcium phosphate (TCP) synthetic graft material (Vitoss; Orthovita) persists for a year or longer in some cases. In this study, we prospectively examined healing of cavitary defects filled with TCP versus TCP and bone marrow aspirate (TCP/BM) with the hypothesis that bone-marrow aspirate speeds incorporation of bone graft substitute.

Methods: Fifty-five patients with a benign bone lesion undergoing surgical curettage were randomized to receive TCP (N = 26; mean duration of follow-up [and standard deviation], 20.