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Surgical and Radiologic Anatomy

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01.04.2009 | Original Article

Mineralisation and mechanical strength of the subchondral bone plate of the inferior tibial facies

verfasst von: H. Mühlhofer, Y. Ercan, S. Drews, M. Matsuura, J. Meissner, U. Linsenmaier, R. Putz, M. Müller-Gerbl

Erschienen in: Surgical and Radiologic Anatomy | Ausgabe 4/2009

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Abstract

Background

The implantation of total ankle prosthesis is one of the most challenging operations in orthopaedic surgery. The main problem that surgeons face is the fixation of the total ankle prosthesis on the tibial side. The subchondral bone plate of the distal tibia is considered the strongest region on the inferior tibial facies. Based on information about the mineralisation of the subchondral bone plate, conclusions can be made concerning the mechanical stress, age-related changes, post-surgical biomechanical situations and regions of fixation. The aim of this study was to determine the correlation between the mineralisation of the subchondral bone plate and the topical mechanical strength.

Methods

By means of CT-osteoabsorptiometry, the distribution of mineralisation in the subchondral bone plate in 18 distal Tibiae was investigated. After removal of the cartilage of the facies articularis inferior, the mechanical strength of the joint surface was measured with an indentation apparatus. The linear regression of the mineralisation density and the maximal mechanical strength to penetrate the subchondral bone plate was determined.

Results

Our data showed a coefficient of determination between 0.75 and 0.97 and a coefficient of correlation between 0.86 and 0.97. The T test showed significance (P < 0.05). Furthermore, we demonstrated a bicentric distribution of mineralisation patterns. The maximal mineralisation was found ventromedially and mediolaterally on the joint surface.

Conclusion

Our study shows good correlation of mineralisation and mechanical property of the inferior tibial facies. Therefore, as the results provide information on the topographical distribution of bone quality, they could be useful for the development of new fixation methods for total ankle prosthesis.

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Titel: Mineralisation and mechanical strength of the subchondral bone plate of the inferior tibial facies
verfasst von: H. Mühlhofer
Y. Ercan
S. Drews
M. Matsuura
J. Meissner
U. Linsenmaier
R. Putz
M. Müller-Gerbl
Publikationsdatum: 01.04.2009
Verlag: Springer-Verlag
Erschienen in: Surgical and Radiologic Anatomy / Ausgabe 4/2009
Print ISSN: 0930-1038
Elektronische ISSN: 1279-8517
DOI: https://doi.org/10.1007/s00276-008-0430-6

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Mineralisation and mechanical strength of the subchondral bone plate of the inferior tibial facies