Knee Flexion Contractures in @entity1 with XXXX : Clinical Features and Histologic Characterization of the Posterior Capsule.

@entity1 @entity571 @entity1159 @entity66
OBJECTIVE: To (1) identify demographic and clinical factors associated with @entity1159 ( @entity1159 ) in the setting of @entity571 ( @entity571 ) and (2) histologically compare the posterior knee capsule of @entity1 with @entity571 with and without @entity1159 . DESIGN: Cross-sectional study. SETTING: Primary care, including private and institutional practice. @entity1 : Thirteen @entity1 with primary @entity571 and @entity1159 and 8 @entity1 with primary @entity571 without @entity1159 . METHODS: We compared the @entity1159 and non- @entity1159 groups to identify demographic and clinical factors associated with @entity1159 . We examined the histology of the posterior knee capsules of 9 @entity1 with @entity1159 and 6 without. MAIN OUTCOME MEASUREMENTS: @entity1 demographic and clinical factors. For histology we measured the proportional composition of collagenous, adipose, and synovial tissues; fibroblast and adipocyte cellularity; and synovial thickness. RESULTS: @entity1 with @entity1159 had longer duration of @entity571 , reduced flexion of the surgical knee, and reduced extension of the contralateral knee (P = .04, <.01, and <.01 respectively). Histologically, there was a greater proportion of collagenous tissue and a lower proportion of adipose and synovial tissues in the @entity1159 group than in the noncontracture group; however, the differences were not statistically significant. Cellularity was similar between the 2 groups. CONCLUSIONS: Longer duration of knee @entity571 , reduced surgical knee flexion, and reduced contralateral, nonsurgical knee extension were associated with @entity1159 in the @entity571 knee undergoing total arthroplasty. Monitoring bilateral knee range of motion in @entity1 with longer-duration @entity571 could allow earlier intervention, reducing functional loss. Capsular tissue composition analysis may indicate a @entity66 process. Further research in which a larger sample size is used will help clarify these novel findings.
