Development and evaluation of a shape completion model for corrective osteotomy of distal radius malunion patients

5 pages•Published: December 17, 2024

Camiel Smees, Judith Olde Heuvel, Esmee van Uum, Anne Vochteloo and Gabriëlle Tuijthof

Abstract

3D planning of a corrective osteotomy of a radius malunion requires a healthy reference which is not always available. A shape completion model could create a reference bone based on the unaffected part of the malunited bone. The aim of this study is to develop and validate a shape completion model for clinical use.
A statistical shape model (SSM) was developed based on CT scans of 80 healthy radii. This SSM was expanded into a shape completion model to predict the distal 12% of the radius, based on the proximal 88%. Nine other CT scans were used to validate this model and to set hyper parameters that dictate factors of the available data. Finally, eight more CT scans were used to test the performance of the shape completion model.
The average accuracy of the shape completion model, measured through a root mean square difference, was 0.42mm (SD 0.10) and the average Hausdorff distance was 3.57mm (SD 1.09). The predicted radii were comparable to the actual radii, with the differences mainly found at the radial styloid, Lister tubercle and the sigmoid notch. The radiocarpal articular surface was often well predicted.
In conclusion, the current shape completion model showed to predict clinically useable models that have error margins that are comparable with previous models described in literature. Future research should compare the use of the shape completion model to the use of the contralateral radius to find what technique works more optimal.

Keyphrases: 3d planning, distal radius malunion, shape completion model

In: Joshua W Giles and Aziliz Guezou-Philippe (editors). Proceedings of The 24th Annual Meeting of the International Society for Computer Assisted Orthopaedic Surgery, vol 7, pages 202-206.

Links:	https://easychair.org/publications/paper/29TG
	https://doi.org/10.29007/wlq3

BibTeX entry

@inproceedings{CAOS2024:Development_evaluation_shape_completion,
  author    = {Camiel Smees and Judith Olde Heuvel and Esmee van Uum and Anne Vochteloo and Gabriëlle Tuijthof},
  title     = {Development and evaluation of a shape completion model for corrective osteotomy of distal radius malunion patients},
  booktitle = {Proceedings of The 24th Annual Meeting of the International Society for Computer Assisted Orthopaedic Surgery},
  editor    = {Joshua W Giles and Aziliz Guezou-Philippe},
  series    = {EPiC Series in Health Sciences},
  volume    = {7},
  publisher = {EasyChair},
  bibsource = {EasyChair, https://easychair.org},
  issn      = {2398-5305},
  url       = {/publications/paper/29TG},
  doi       = {10.29007/wlq3},
  pages     = {202-206},
  year      = {2024}}

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