The Transverse Mechanical Axis of the Pelvis for Post-Operative Evaluation of Total Hip Arthroplasty
Currently, orthopedic surgeons mainly use the inter-teardrop line (IT-line) as the transverse mechanical axis of the pelvis (TAP) for postoperative evaluation of total hip arthroplasty (THA). However, the teardrop is often unclear in the pelvis anteroposterior (AP) radiographs, which makes postopera...
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| Format: | Article |
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MDPI AG
2023-05-01
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| Series: | Biomedicines |
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| Online Access: | https://www.mdpi.com/2227-9059/11/5/1397 |
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| author | Cheng-Jui Tsai Zong-Yan Yang Tai-Yin Wu Ya-Ting Tsai Juyn-Jhe Wang Chen-Kun Liaw |
| author_facet | Cheng-Jui Tsai Zong-Yan Yang Tai-Yin Wu Ya-Ting Tsai Juyn-Jhe Wang Chen-Kun Liaw |
| author_sort | Cheng-Jui Tsai |
| collection | DOAJ |
| description | Currently, orthopedic surgeons mainly use the inter-teardrop line (IT-line) as the transverse mechanical axis of the pelvis (TAP) for postoperative evaluation of total hip arthroplasty (THA). However, the teardrop is often unclear in the pelvis anteroposterior (AP) radiographs, which makes postoperative evaluation of THA difficult. In this study, we attempted to identify other clear and accurate axes for postoperative evaluation of THA. We calculated the mean and standard deviation of these angles and tested the significance of these angles using <i>t</i>-tests. The inter-teardrops line (IT line) and the upper rim of the obturator foramen (UOF) had smaller angles with the IFH line. The bi-ischial line (BI line) was relatively inaccurate in measurements. We recommend using the IT line as the TAP when the lower boundary of the teardrops is clear and the shapes of the teardrops on both sides of the pelvis are symmetrical. When there is no deformation of the obturator foramen on pelvic AP radiographs, the UOF is also a good choice for the TAP. We do not recommend the BI line as the TAP. |
| first_indexed | 2024-03-11T03:54:44Z |
| format | Article |
| id | doaj.art-65bf6fe800794bba88cb720822fc5ce1 |
| institution | Directory Open Access Journal |
| issn | 2227-9059 |
| language | English |
| last_indexed | 2024-03-11T03:54:44Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Biomedicines |
| spelling | doaj.art-65bf6fe800794bba88cb720822fc5ce12023-11-18T00:36:28ZengMDPI AGBiomedicines2227-90592023-05-01115139710.3390/biomedicines11051397The Transverse Mechanical Axis of the Pelvis for Post-Operative Evaluation of Total Hip ArthroplastyCheng-Jui Tsai0Zong-Yan Yang1Tai-Yin Wu2Ya-Ting Tsai3Juyn-Jhe Wang4Chen-Kun Liaw5School of Medicine, College of Medicine, Taipei Medical University, Taipei City 11031, TaiwanSchool of Medicine, College of Medicine, Taipei Medical University, Taipei City 11031, TaiwanDepartment of Family Medicine, Zhongxing Branch, Taipei City Hospital, Taipei City 10341, TaiwanSchool of Medicine, China Medical University, Taichung City 404333, TaiwanSchool of Medicine, College of Medicine, Taipei Medical University, Taipei City 11031, TaiwanDepartment of Orthopedics, School of Medicine, College of Medicine, Taipei Medical University, Taipei City 11031, TaiwanCurrently, orthopedic surgeons mainly use the inter-teardrop line (IT-line) as the transverse mechanical axis of the pelvis (TAP) for postoperative evaluation of total hip arthroplasty (THA). However, the teardrop is often unclear in the pelvis anteroposterior (AP) radiographs, which makes postoperative evaluation of THA difficult. In this study, we attempted to identify other clear and accurate axes for postoperative evaluation of THA. We calculated the mean and standard deviation of these angles and tested the significance of these angles using <i>t</i>-tests. The inter-teardrops line (IT line) and the upper rim of the obturator foramen (UOF) had smaller angles with the IFH line. The bi-ischial line (BI line) was relatively inaccurate in measurements. We recommend using the IT line as the TAP when the lower boundary of the teardrops is clear and the shapes of the teardrops on both sides of the pelvis are symmetrical. When there is no deformation of the obturator foramen on pelvic AP radiographs, the UOF is also a good choice for the TAP. We do not recommend the BI line as the TAP.https://www.mdpi.com/2227-9059/11/5/1397total hip arthroplastyacetabular componentspelvic axispostoperative evaluationpelvis anteroposterior radiographslimb length discrepancy (LLD) |
| spellingShingle | Cheng-Jui Tsai Zong-Yan Yang Tai-Yin Wu Ya-Ting Tsai Juyn-Jhe Wang Chen-Kun Liaw The Transverse Mechanical Axis of the Pelvis for Post-Operative Evaluation of Total Hip Arthroplasty Biomedicines total hip arthroplasty acetabular components pelvic axis postoperative evaluation pelvis anteroposterior radiographs limb length discrepancy (LLD) |
| title | The Transverse Mechanical Axis of the Pelvis for Post-Operative Evaluation of Total Hip Arthroplasty |
| title_full | The Transverse Mechanical Axis of the Pelvis for Post-Operative Evaluation of Total Hip Arthroplasty |
| title_fullStr | The Transverse Mechanical Axis of the Pelvis for Post-Operative Evaluation of Total Hip Arthroplasty |
| title_full_unstemmed | The Transverse Mechanical Axis of the Pelvis for Post-Operative Evaluation of Total Hip Arthroplasty |
| title_short | The Transverse Mechanical Axis of the Pelvis for Post-Operative Evaluation of Total Hip Arthroplasty |
| title_sort | transverse mechanical axis of the pelvis for post operative evaluation of total hip arthroplasty |
| topic | total hip arthroplasty acetabular components pelvic axis postoperative evaluation pelvis anteroposterior radiographs limb length discrepancy (LLD) |
| url | https://www.mdpi.com/2227-9059/11/5/1397 |
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