Adolescent idiopathic scoliosis （AIS） is one of the most prevalent diseases among teenagers, with an incidence rate of 1-3% worldwide, and at least 0.02% of patients require surgical treatment. The ＂gold standard＂...Adolescent idiopathic scoliosis （AIS） is one of the most prevalent diseases among teenagers, with an incidence rate of 1-3% worldwide, and at least 0.02% of patients require surgical treatment. The ＂gold standard＂ procedure is instrumentation and fusion of 10 or more vertebrae with forceful correction of the deformity.Although autogenous bone grafts are the ＂gold standard＂ for spine fusion, significant progress has been made in discovering bone graft alternatives, including freeze-dried allograft, demineralized bone matrix （DBM）, triosite ceramics, and bone marrow aspirate （BMA）, which have been used as substitutes for iliac crest in AIS surgery.展开更多
Background： A quantitative and accurate measurement of the range of hip joint flexion （RHF） is necessarily required in the evaluation of disordered or artificial hip joint function. This study aimed to assess a nov...Background： A quantitative and accurate measurement of the range of hip joint flexion （RHF） is necessarily required in the evaluation of disordered or artificial hip joint function. This study aimed to assess a novel method to measure RHF more accurately and objectively. Methods： Lateral radiographs were taken of 31 supine men with hip joints extended or flexed. Relevant angles were measured directly from the radiographs. The change in the sacrofemoral angle （SFA） （the angle formed between the axis of the femur and the line tangent to the upper endplate of S1） from hip joint extension to hip joint flexion, was proposed as the RHF. The validity of this method was assessed via concomitant measurements of changes in the femur-horizontal angle （between the axis of the femur and the horizontal line） and the sacrum-horizontal angle （SHA） （between the line tangent to the upper endplate of S 1 and the horizontal line）, the difference of which should equal the change in the SFA. Results： The mean change in the SFA was 112.5 ± 7.4°, and was independent of participant age, height, weight, or body mass index. The mean changes in the femur-horizontal and SHAs were 123.0±6.4° and 11.4 ± 3.0°, respectively. This confirmed that the change of SFA between hip joint extension and hip joint flexion was equal to the difference between the changes in the femur-horizontal and SHAs. Conclusions： Using the SFA, to evaluate RHF could prevent compromised measurements due to the movements of pelvis and lumbar spine during hip flexion, and is, therefore, a more accurate and objective method with reasonable reliability and validity.展开更多
基金grants from the National Natural Science Foundation of China，Shanghai Natural Science Foundation，Youth Project of Shanghai Municipal Health and Family Planning Commission
文摘Adolescent idiopathic scoliosis （AIS） is one of the most prevalent diseases among teenagers, with an incidence rate of 1-3% worldwide, and at least 0.02% of patients require surgical treatment. The ＂gold standard＂ procedure is instrumentation and fusion of 10 or more vertebrae with forceful correction of the deformity.Although autogenous bone grafts are the ＂gold standard＂ for spine fusion, significant progress has been made in discovering bone graft alternatives, including freeze-dried allograft, demineralized bone matrix （DBM）, triosite ceramics, and bone marrow aspirate （BMA）, which have been used as substitutes for iliac crest in AIS surgery.
文摘Background： A quantitative and accurate measurement of the range of hip joint flexion （RHF） is necessarily required in the evaluation of disordered or artificial hip joint function. This study aimed to assess a novel method to measure RHF more accurately and objectively. Methods： Lateral radiographs were taken of 31 supine men with hip joints extended or flexed. Relevant angles were measured directly from the radiographs. The change in the sacrofemoral angle （SFA） （the angle formed between the axis of the femur and the line tangent to the upper endplate of S1） from hip joint extension to hip joint flexion, was proposed as the RHF. The validity of this method was assessed via concomitant measurements of changes in the femur-horizontal angle （between the axis of the femur and the horizontal line） and the sacrum-horizontal angle （SHA） （between the line tangent to the upper endplate of S 1 and the horizontal line）, the difference of which should equal the change in the SFA. Results： The mean change in the SFA was 112.5 ± 7.4°, and was independent of participant age, height, weight, or body mass index. The mean changes in the femur-horizontal and SHAs were 123.0±6.4° and 11.4 ± 3.0°, respectively. This confirmed that the change of SFA between hip joint extension and hip joint flexion was equal to the difference between the changes in the femur-horizontal and SHAs. Conclusions： Using the SFA, to evaluate RHF could prevent compromised measurements due to the movements of pelvis and lumbar spine during hip flexion, and is, therefore, a more accurate and objective method with reasonable reliability and validity.
