Measurement of the Acetabular Cup Anteversion on Simulated Radiographs

被引：43

作者：

Liaw, Chen-Kun ^{[1
,2
]}

Yang, Rong-Sen ^{[3
]}

Hou, Sheng-Mou ^{[3
]}

Wu, Tai-Yin ^{[4
]}

Fuh, Chiou-Shann ^{[1
]}

机构：

[1] Natl Taiwan Univ, Dept Comp Sci & Informat Engn, Inst Comp Sci & Informat Engn, Taipei 106, Taiwan

[2] Tao Yuan Gen Hosp, Dept Orthopaed, Tao Yuan, Taiwan

[3] Natl Taiwan Univ & Hosp, Coll Med, Dept Orthopaed, Taipei, Taiwan

[4] Taipei City Hosp, Renai Branch, Taipei, Taiwan

来源：

JOURNAL OF ARTHROPLASTY | 2009年 / 24卷 / 03期

关键词：

hip arthroplasty; acetabulum; anteversion; protractor; TOTAL HIP-REPLACEMENT; PLAIN RADIOGRAPHS; ARTHROPLASTIES; ORIENTATION;

D O I：

10.1016/j.arth.2007.10.029

中图分类号：

R826.8 [整形外科学]; R782.2 [口腔颌面部整形外科学]; R726.2 [小儿整形外科学]; R62 [整形外科学（修复外科学）];

学科分类号：

摘要：

Widmer (J Arthroplasty 2004;19:387) reported a protractor for measuring the anteversion of acetabular cups on radiographs but with limited precision. We intended to improve its precision by trigonometric mathematics. We measured the anteversion of the acetabular cups on 336 Simulated radiographs using aforementioned 2 methods. The anteversion measured by Widmer's protractor ranged from 7 degrees to 41 degrees (mean +/- SD = 28.0 degrees +/- 9.8 degrees), and our methods, 5 degrees to 51 degrees (27.7 degrees +/- 13.2 degrees). The mean +/- SD of error by Widmer's protractor was 5.2 +/- 2.5 degrees, and our protractor, 0.8 degrees +/- 0.8 degrees (Student t test, P < .0001). The interobserver study showed the difference between measurements less than 2 degrees for each method. Therefore, the smaller error of our method than that of Widmer implicated a potentially precise measurement of the anteversion (level of evidence: diagnostic Study, level II).

引用

页码：468 / 474

页数：7

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