Abstract：
:Accurate models of bone shapes are essential for orthopaedic reconstructions. The commonly used methods of using the contralateral side requires an intact bone and anatomical symmetry. Recent studies have shown that statistical shape and appearance models (SSAMs) as an alternative can predict accurate geometric models, but the accuracy of the mechanical property prediction is typically not addressed. This study compares stress and strain differences under identical loading conditions for reconstructions from partial anatomies. SSAMs representing shape and grey values were created using 40 female cadaveric X-ray computed tomography scans. Finite element models were created for shape reconstructions from partial bone of various lengths with boundary conditions obtained from musculoskeletal simulations. Commonly used anatomical measures, measures of the surface deviations and maximal stresses and strains were used to compare the reconstruction accuracy to the contralateral side. Surface errors were smaller compared to the contralateral side for reconstructions with 90% of the bone and slightly bigger when less bone was available. Anatomical measures were comparable. The contralateral side showed slightly smaller relative errors for strains of up to 6% on average. This study has shown that SSAM reconstructions using partial bone geometry are a possible alternative to the contralateral side.
journal_name
Med Eng Physjournal_title
Medical engineering & physicsauthors
Nolte D,Bull AMJdoi
10.1016/j.medengphy.2019.03.007subject
Has Abstractpub_date
2019-05-01 00:00:00pages
55-65eissn
1350-4533issn
1873-4030pii
S1350-4533(19)30052-9journal_volume
67pub_type
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