Spine
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Cross-cultural adaptation and psychometric testing of the Spinal Appearance Questionnaire (SAQ). ⋯ The SC-SAQ showed satisfactory reliability and validity in the evaluation of spinal deformity appearance for patients with AIS in mainland China.
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A paired biomechanical study of pedicle screws augmented with bone cement in a human cadaveric and osteoporotic lumbar spine model. OBJECTIVES.: To evaluate immediate strength and stiffness of pedicle screw fixation augmented with a novel bioactive bone cement in an osteoporotic spine model and compare it with polymethylmethacrylate (PMMA) cement. ⋯ This paired-design study identified some subtle but mostly nonsignificant differences in immediate biomechanical fixation of pedicle screws augmented with the Sr-HA cement compared with the PMMA cement.
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A cross-sectional autopsy study. ⋯ Endplate lesions are common and tend to affect both adjacent endplates of a disc simultaneously. The distribution patterns of the various types of endplate lesions differ, suggesting that they may have different pathogenic origins. Age or associated factors may play an important role in the pathogenesis of endplate lesions.
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An in vitro biomechanics investigation exposing porcine functional spinal units (FSUs) to submaximal cyclic or static compressive forces while in a flexed, neutral, or extended posture. ⋯ Posture is an important mechanical factor to consider when assessing the risk of injury from cyclic loading to the lumbar spine.
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Descriptive experimental study. ⋯ Physical exercise was shown to have positive effects on cell proliferation in IVDs, with involvement of various disc regions, indicating a differential response by disc tissue to exercise depending on anatomical location and tissue characteristics.