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Reverse Modelling of Human Long Bones Using T-Splines - Case of Tibia

2018; Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering i; Volume: 25; Issue: 6 Linguagem: Inglês

10.17559/tv-20180129210021

1848-6339

Marko Veselinović, Nikola Vitković, Miroslav Trajanović, Stojanka Arsić, Milorad Mitković, Miloš Stojković, Dragan Marinković,

Engineering Technology and Methodologies

Creating a sufficiently accurate digital model of human bone geometry for a specific patient is the starting point for personalized orthopaedic surgical treatment.Such geometrical model of a particular human bone serves as a template for designing personalized bone implant, which can be an endoprostheses, fixator plate or even scaffold.Due to that role, the geometry of a human bone model has to be reusable and modifiable.Otherwise, design of the corresponding personalized implant for a particular human bone is a very difficult task.Modern reverse modelling techniques have greatly accelerated the creation of a bone geometric model.The prevailing modern approach is based on the use of non-uniform rational B-splines.However, recent research shows that the very complex topology of bio-shapes, such as human bones, can be reconstructed more easily using T-Splines.The presented approach of using T-splines in a modelling process allows creation of a bone model with important advantages regarding quality, flexibility and geometric accuracy.The process of reverse modelling starts from the cloud of points gained through computer-tomography images and uses selected referential geometric, i.e. anatomic entities as guiding elements in digital reconstruction of the particular bone geometry.