Format

Send to

Choose Destination
Clin Orthop Relat Res. 2010 Feb;468(2):571-5. doi: 10.1007/s11999-009-1064-7. Epub 2009 Aug 28.

Quantification of pelvic tilt in total hip arthroplasty.

Author information

1
The Arthritis Institute, 637 S Lucas Avenue, 5th Floor, Los Angeles, CA 90017, USA.

Abstract

In THA, anterior or posterior tilt of the pelvis changes the position of the acetabular component on the coronal plane of the body as compared with its anatomic position in the pelvic bone. To understand the occurrence and clinical importance for patients with pelvic tilt on an operating room table in the lateral decubitus position, we studied 436 patients (477 hips) undergoing primary THA using an imageless computer navigation system that measured tilt. We determined the distribution and magnitude of pelvic tilt, especially tilt of 10 degrees or greater. The distribution of tilt had a range of 25 degrees posterior to 20 degrees anterior. Twenty-nine of 477 (6.1%) hips had zero tilt; 251 (52.6%) had tilt of 1 degrees to 5 degrees; 120 (25.2%) had tilt of 6 degrees to 9 degrees; and 77 (16.1%) had tilt of 10 degrees or greater. The conversion factor for acetabular anteversion has been determined by a mathematical formula by Lembeck et al. and was confirmed by us in practice. Measurement of pelvic tilt during the performance of THA will improve the accuracy of cup position, especially allowing anteversion to be measured on the coronal plane.

LEVEL OF EVIDENCE:

Level II, prognostic study. See Guidelines for Authors for a complete description of levels of evidence.

PMID:
19714387
PMCID:
PMC2806995
DOI:
10.1007/s11999-009-1064-7
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for Wolters Kluwer Icon for PubMed Central
Loading ...
Support Center