Fit assessment of anatomic plates for the distal medial tibia

Schmutz, Beat, Wullschleger, Martin E., Kim, Henry, Noser, Hansrudi and Schutz, Michael A. (2008) Fit assessment of anatomic plates for the distal medial tibia. Journal of Orthopaedic Trauma, 22 4: 258-263. doi:10.1097/BOT.0b013e31816b10ba

Author Schmutz, Beat
Wullschleger, Martin E.
Kim, Henry
Noser, Hansrudi
Schutz, Michael A.
Title Fit assessment of anatomic plates for the distal medial tibia
Journal name Journal of Orthopaedic Trauma   Check publisher's open access policy
ISSN 0890-5339
Publication date 2008-04
Sub-type Article (original research)
DOI 10.1097/BOT.0b013e31816b10ba
Volume 22
Issue 4
Start page 258
End page 263
Total pages 6
Place of publication Philadelphia, PA, United States
Publisher Lippincott Williams & Wilkins
Language eng
Formatted abstract
Objectives: With the development and popularization of minimally invasive surgical methods and implants for fracture fixation, it is increasingly important that the available implants are precontoured to the specific anatomic location for which they are designed. The objective of this study was to develop a noninvasive method and criteria for quantifying the fit of a distal periarticular medial tibia plate and to test the method on a small set of tibia models.
Methods: The undersurface of the plate was extracted from a digital model of the plate. The surface of the plate was fitted to 21 computer tomography (CT)-based 3-dimensional (3-D) models of human tibiae. Four criteria were defined that constitute an anatomic plate fit and subsequently were applied for the quantitative fit assessment. The fitting of the plate undersurface to the bone was entirely conducted in a virtual environment.
Results: An anatomic fit of the plate was achieved for 4 of the models (19%). The individual categories generated fits of 62% (n = 13) for the proximal end; 43% (n = 9) for the proximal angle; 57% (n = 12) for the middle distance; and 57% (n = 12) for a distal fit.
Conclusions: Although for the 4 individual criteria plate fits of 43%-62% were achieved, a global/anatomic fit only occurred for 19% of the bone models. This outcome is likely a result of bone morphology variations, which exist in a random population sample combined with the effects of a nonoptimized plate shape. Recommendations for optimizing the fit of the plate are discussed.
Keyword 3D models
Plate fit
Periarticular plates
Fracture fixation
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
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Created: Tue, 01 Nov 2011, 17:43:12 EST by Martin Wullschleger on behalf of Surgery - Royal Brisbane and Women's Hospital