前后位X线片上髋臼杯前倾角测量

Measurement of anteversion angle of the acetabular cup from anteroposterior radiographs

目的 证实RitenPradhan提出的髋臼杯前倾角测量方法的可靠性和可行性。方法 在标本上行人工全髋臼杯的多个角度前倾角的前后位X线摄片 ,将测量、计算的结果与实际角度进行比较 ,对实际人工全髋置换患者的臼杯前倾角进行测量和计算 ,并分析其与临床症状的关系。结果 经统计学处理 ,测量角度与实际角度两组差异无显著性 (P >0 0 5 ) ;应用中发现前倾角 0°～ 33° ,平均2 1° ,1例前倾角测量值为 0° ,术后出现脱位 ,2例在术后随访中发现前倾角有明显变化 ,髋臼杯松动。结论 该方法理论依据充分 ,测量工具普通 ,计算方法简单 ,结果误差小 ,临床中可预测人工髋关节稳定性、诊断髋臼杯松动和指导临床操作 ,是一种可靠。

Objective To confirm the reliability and feasibility of measuring anterior tilt angle of the acetabular cup from plain anteroposterior radiographs. Methods The plain anteroposterior radiographs at various anterior tilt angle of the acetabular cup on the specimen were projected. The results between experiment and reality were analysed statistically.The method was applied clinically and the relation between the results and symptom were analysed. Results There was no difference in both groups( P >0 05). During applying the method,1 case of the dislocation and 2 cases of the loose about the cup were found. Conclusion The method shows enough theoretical evidence and popular instruments are used with little error and simple calculation methods. Clinically, the stability of artificial hip joint can be forecasted, loosening of acetabular cup diagnosed by the method It can also direct the clinical procedure. The method is simple, reliable, feasible and practical.