To determine if clinical outcomes are correlated with center of rotation (COR) in patients implanted with a viscoelastic total disc replacement (VTDR). Fifty patients with single-level, symptomatic lumbar DDD between L4 and S1 were enrolled in a clinical trial of a VTDR across three surgical centres. A comprehensive, independent review and statistical analysis of both clinical and radiographic outcomes was performed and analyzed for correlations. Data from preoperative through 2 years were available. The COR was calculated for the index levels and compared to data for an asymptomatic population. Each COR coordinate was classified as abnormal if outside of the 95% confidence interval for an asymptomatic population.Purpose
Methods
Accurate knowledge of the normal shoulder range of movement (ROM) is imperative for evaluating pathology and clinical success. However, in orthopaedic texts, the quoted normal shoulder ROM has significant variation. Furthermore we suspect there is a high incidence of intra and inter observer error during shoulder ROM examination. The aims of our study were thus: To perform a literature review and record the published values for normal shoulder ROM. Subsequently, to calculate the average of these published values. To perform visual and goniometer measurement of shoulder ROM in 10 volunteers and assess the agreement between the two methods. A literature search of textbooks, Pub Med and scoring systems was undertaken. Statistical analysis was performed to identify the average value of shoulder movements. Two researchers (specialist trainees in T&O) prospectively assessed 20 shoulders in 10 healthy volunteers. Second observations were made after two weeks. Visual estimation and goniometry assessments were conducted. Bland Altman analysis was performed.Aims
Methods
