Original scientific paper

https://doi.org/10.17559/TV-20180129210021

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

Milos Stojkovic orcid.org/0000-0001-9020-125X ; University of Nis, Faculty of Mechanical Engineering, Aleksandra Medvedeva 14, 18000, Nis, Serbia
Marko Veselinovic ; University of Nis, Faculty of Mechanical Engineering, Aleksandra Medvedeva 14, 18000, Nis, Serbia
Nikola Vitkovic ; University of Nis, Faculty of Mechanical Engineering, Aleksandra Medvedeva 14, 18000, Nis, Serbia
Dragan Marinkovic orcid.org/0000-0002-3583-9434 ; Department of Structural Analysis, Berlin Institute of Technology, Str. d. 17. Juni 135, 10623 Berlin, Germany
Miroslav Trajanovic orcid.org/0000-0002-3325-0933 ; University of Nis, Faculty of Mechanical Engineering, Aleksandra Medvedeva 14, 18000, Nis, Serbia
Stojanka Arsic ; Univeristy of Nis, Faculty of Medicine, Blvd. Dr Zorana Djindjica 81, 18000 Nis, Serbia
Milorad Mitkovic ; Univeristy of Nis, Faculty of Medicine, Blvd. Dr Zorana Djindjica 81, 18000 Nis, Serbia

Abstract

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.

Keywords

CAD; human bone modelling; reverse modelling; T-splines; Tibia

Hrčak ID:

212831

URI

https://hrcak.srce.hr/212831

Publication date:

16.12.2018.

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