Computer-Assisted Planning, Simulation, and Navigation System for Periacetabular Osteotomy.

Liu, Li; Siebenrock, Klaus-Arno; Nolte, Lutz-P; Zheng, Guoyan (2018). Computer-Assisted Planning, Simulation, and Navigation System for Periacetabular Osteotomy. Advances in experimental medicine and biology, 1093, pp. 143-155. 10.1007/978-981-13-1396-7_12

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Periacetabular osteotomy (PAO) is an effective approach for surgical treatment of hip dysplasia in young adults. However, achieving an optimal acetabular reorientation during PAO is the most critical and challenging step. Routinely, the correct positioning of the acetabular fragment largely depends on the surgeon's experience and is done under fluoroscopy to provide the surgeon with continuous live x-ray guidance. Our developed system starts with a fully automatic detection of the acetabular rim, which allows for quantifying the acetabular 3D morphology with parameters such as acetabular orientation, femoral head extrusion index (EI), lateral center-edge (LCE) angle, and total and regional femoral head coverage (FHC) ratio for computer-assisted diagnosis, planning, and simulation of PAO. Intraoperative navigation is conducted to implement the preoperative plan. Two validation studies were conducted on four sawbone models to evaluate the efficacy of the system intraoperatively and postoperatively. By comparing the preoperatively planned situation with the intraoperatively achieved situation, average errors of 0.6° ± 0.3°, 0.3° ± 0.2°, and 1.1° ± 1.1° were found, respectively, along three motion directions (flexion/extension, abduction/adduction, and external rotation/internal rotation). In addition, by comparing the preoperatively planned situation with the postoperative results, average errors of 0.9° ± 0.3° and 0.9° ± 0.7° were found for inclination and anteversion, respectively.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > Department of Orthopaedic, Plastic and Hand Surgery (DOPH) > Clinic of Orthopaedic Surgery

UniBE Contributor:

Siebenrock, Klaus-Arno


600 Technology > 610 Medicine & health






Kathrin Aeschlimann

Date Deposited:

27 Jun 2019 11:41

Last Modified:

27 Jun 2019 11:41

Publisher DOI:


PubMed ID:


Uncontrolled Keywords:

Hip dysplasia Image-guided surgery Joint preservation surgery Navigation Periacetabular osteotomy (PAO) Planning Simulation


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