中国骨伤2011，Vol.24Issue(11)：930-934,5.DOI:10.3969/j.issn.1003-0034.2011.11.014
满足日常生活活动范围的髋臼假体角度安全范围及杯颈前倾角组合
The cup safe-zone and optimum combination of the acetabular and femoral anteversions that fulfills the desired range of motion of the hip
摘要
Abstract
Objective:To investigate safe range of acetabular prosthesis angle and the optimum combination of cup and neck in the range of activities of daily living (ADL). Methods: A three-dimensional generic parametric and kinematic simulation module of THA was developed. Range of motion (ROM) of flexion 3≥110°, internal-rotation ≥30° at 90° flexion, extension ≥30° and external rotation ≥40° were defined as the normal criteria for desired ROM for activities of daily living(ADL) ,and ROM of flexion ≥120°, internal-rotation ≥45° at 90° flexion,extension ≥30° and external rotation ≥40° as the severe criteria. The range of the changes in the general head-neck ratios (GR), the femoral neck anteversion (FA), the operative antever-sion (OA) and operative inclination (OI) of the cup component were 2-2.92,0°-30° ,0°-70°, 10°-60°respectively. For the collodiaphyseal angle(CCD) of 135°,the corresponding OA related to the 01 which every 5° was calculated,and described using dots and lines in a coordinate system in which OI of acetabular cup was the horizontal ordinate and OA of acetabular cup was the vertical ordinate. All data was analyzed by SAS 6.12 software. Results:Large GR greatly increased the size of safe range and it was recommended that GR be more than 2.37 when the CCD-angle was 135° as it further increases the size of safe-zone. The size of cup safety range of the severe criteria was smaller than normal criteria. When the CCD-angle was 135°, the optimum relationship between OA of acetabular and FA of the normal criteria and the severe criteria can be estimated by the formula:Y1=-0.816x1+39.76 (R2=0.993),Y2=-0-873x2+47.04 (R2=0.999) respectively. Conclusion:Large GR greatly increases the size of safe-zone and it is recommended that GR be more than 2.37, so it extends the acceptable range of error that clinicians cannot avoid it completely. The larger range of the hip motion, the smaller size of the cup safe-zone, but can retrieve by increase the GR. The OA is negative with FA.关键词
关节成形术,置换,髋/髋假体/活动范围,关节/计算机,模拟Key words
Arthroplasty, replacement, hip/Hip prosthesis/Range of motion, articular/Computers, analog引用本文复制引用
李永奖,蔡春元,张力成,杨国敬,周德彪,彭茂秀,陈文良,赵章伟..满足日常生活活动范围的髋臼假体角度安全范围及杯颈前倾角组合[J].中国骨伤,2011,24(11):930-934,5.基金项目
浙江省科技计划基金资助项目(编号:2009C33144) （编号:2009C33144）
温州市科技计划基金资助项目(编号:Y20090274) （编号:Y20090274）
