Effects of pelvic orientation on the anteveration measurement of simulated acetabular cup
10.3969/j.issn.1673-8225.2010.09.014
- VernacularTitle:骨盆体位改变对模拟髋臼假体前倾角测量的影响
- Author:
Xuejun DU
;
Weiming LIAO
;
Ming FU
;
Aishan HE
;
Zibo YANG
;
Yan KANG
;
Peihui WU
;
Hao ZHANG
;
Ziji ZHANG
- Publication Type:Journal Article
- From:
Chinese Journal of Tissue Engineering Research
2010;14(9):1581-1585
- CountryChina
- Language:Chinese
-
Abstract:
BACKGROUND: Acetabular cup orientation using a standard radiograph of the pelvis is quite common method to assess artificial hip replacement nowadays. Non-standardization of pelvic orientation affected accuracy of measurement results, and it is difficult to compare. OBJECTIVE: To make sure how pelvis tilting affect the anteveration of the cup and to elevate clinical accuracy and compare study comparability. METHODS: Designed a simulated acetabular cup with serial concentric circles which pass through the same polars and represent anteveration of 0°, 10°, 20°, 30°, 40°, Loaded the simulated acetabular cup at an inclination of 35°, 40°, 45°, 50°, 55° to6 cadaver pelves, Made the pelves tilt around the frontal axis and sagittal axis with 5° each time in a scope of+30°. Takestandard radiograph of the pelvis accordingly. Radiograph was photographed end frontal angle of dip was measured. RESULTS AND CONCLUSION: Pelvic tilt of about 1° causes measuring errors of anteveration 0. 61 °-0. 73°. The anteveration decreased at both acetabular cups when pelvic posterior tilt and at the acetabular cup that near the X-ray source as pelvic lateral tilt. The anteveration rose at both acetabular cups when pelvic anterior tilt and at the acetabular cup that away from the X-ray source as pelvic lateral tilt. During clinical evaluation, pelvic orientation effects on measurement results should be considered.
