Schwarz, Timo J. and Maderbacher, Gunther and Leiss, Franziska and Grifka, Joachim and Kappenschneider, Tobias and Knebl, Michael (2024) Three-dimensional acetabular reorientation during periacetabular osteotomy: an intraoperative navigation method using an external fixator for periacetabular osteotomy. ARCHIVES OF ORTHOPAEDIC AND TRAUMA SURGERY, 144 (11). pp. 4969-4977. ISSN 0936-8051, 1434-3916
Full text not available from this repository. (Request a copy)Abstract
Introduction Bernese periacetabular osteotomy (PAO) is an effective procedure for treating acetabular dysplasia. However, limited visual control of the acetabular position during surgery may result in under- or overcorrection or changes in acetabular version resulting in residual dysplasia or femoroacetabular impingement. Thus, we wanted to develop a simple and straightforward navigation method that provides information about acetabular correction in all three planes during surgery. Method Intraoperatively, acetabular coordinates are shown in coronal, sagittal, and transverse plane by two perpendicular tubes of an external fixator mounted onto a third tube that is fixed to the mobilized acetabular fragment with two Schanz screws. The application and fixation of the external fixator on the pelvis are demonstrated in this article. We used this analog navigation method on 27 PAOs, where we mainly performed a lateral rotational correction. The pre- and postoperative radiographs of these 27 hips were analyzed regarding the radiological hip parameters, taking into account the pelvic tilt. Results The mean preoperative lateral center edge angle (LCEA) of the 27 PAOs improved from 16 degrees (+-6) to a mean of 34 degrees (+-6 degrees) and the mean acetabular index (AI) was corrected from 15 degrees (+-4) to 2 degrees (+-4). This implements highly physiologic postoperative values for lateral coverage in this population. In this case series, no postoperative acetabular retroversion was measured in any of the 27 PAOs. Conclusion Three-dimensional control of the acetabular orientation during periacetabular osteotomy is important to avoid over- and undercorrection. Using a fixateur externe as an analog navigation method this three-dimensional control can be implemented intraoperatively for PAOs.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FOLLOW-UP; TRIPLE OSTEOTOMY; CUP MEASUREMENT; DYSPLASIA; SURVIVORSHIP; HIPS; THA; Periacetabular osteotomy; Retroversion; Dysplasia; Hip surgery; Impingement; Navigation |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Orthopädie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 13 Jan 2026 09:58 |
| Last Modified: | 13 Jan 2026 09:58 |
| URI: | https://pred.uni-regensburg.de/id/eprint/64508 |
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