Computer aided surgery : official journal of the International Society for Computer Aided Surgery
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Comput. Aided Surg. · Nov 2006
Comparative StudyImplant position calculation for acetabular cup placement considering pelvic lateral tilt and inclination.
The purpose of this study was to investigate the relationship of cup position versus pelvic lateral tilt and inclination. While computer assisted navigation systems use only the pelvic frontal plane for cup placement, it is important to realize the effect of leg length differences or increased pelvic inclination, i.e., caused by contracted hip flexors. ⋯ Using computer navigation, it is possible to determine pelvic inclination and lateral tilt during an operation by calculating the angular difference between the anatomic frontal plane and the "real world" frontal plane (i.e., the OR table). This method may be helpful in increasing the accuracy of positioning of acetabular cups.