Abstract
Objective: In Total Hip Arthroplasty, 2D template on Plain X-ray is usually used for preoperative planning. But deformity and contracture can cause malpositionning and measurement error. To reduce those problems, a 3D preoperative simulation system was developed.
Materials and methods: 30 hip joints of 25 patients were included in this study. Very accurate AP and ML images of the femur was created based on 3-DCT Images. 3-DCT images were compared with 2-D template sheet and determined the size of the stem. Another way, fully 3D model of the femur was created. 3-D geometry data of the femur and the data of the stem were compared. Plastic skull models of the 10 patients were fabricated by stereolithography from three-dimensional data based on computed tomography bone images.
Results: The preoperative measurement of the stem size was accorded with the postoperative results in 85% cases.
Conclusion: The 3-D simulation method is particularly useful for the simulation planning of the severe deformed femur such as post osteotomy.
The abstracts were prepared by Professor Jegan Krishnan. Correspondence should be addressed to him at the Flinders Medical Centre, Bedford Park 5047, Australia.
