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01-04-2011 | Original Paper

Biomechanical in vitro assessment of fixed angle plating using a new concept of locking for the treatment of osteoporotic proximal humerus fractures

Authors: Götz Röderer, Florian Gebhard, Gert Krischak, Hans-Joachim Wilke, Lutz Claes

Published in: International Orthopaedics | Issue 4/2011

Abstract

Locked plating attempts to improve mechanical stability via better anchorage of the screws in the bone. In 22 paired osteoporotic humeri an AO/ASIF 11-B 1 fracture was created. Locked and conventional plating using the same device of the latest generation was performed. Torsional loading around three axes (x = varus/valgus, y = flexion/extension, z = axial rotation) with an increasing moment (2, 3.5, 5 and 7.5 N·m) was applied. Interfragmentary motion within the locked group was lower for all three axes with higher cumulative survival rates (p < 0.05). The typical mode of failure was loss of fixation in the humeral head occurring earlier in the conventional group. The locking mechanism investigated provides more ultimate strength in an osteoporotic proximal humerus fracture model. Correlation with BMD suggests that this device may especially be suitable for use in osteoporotic bone.

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Title: Biomechanical in vitro assessment of fixed angle plating using a new concept of locking for the treatment of osteoporotic proximal humerus fractures
Authors: Götz Röderer
Florian Gebhard
Gert Krischak
Hans-Joachim Wilke
Lutz Claes
Publication date: 01-04-2011
Publisher: Springer-Verlag
Published in: International Orthopaedics / Issue 4/2011
Print ISSN: 0341-2695
Electronic ISSN: 1432-5195
DOI: https://doi.org/10.1007/s00264-010-1021-9

At a glance: The STEP trials

Springer Medicine

Biomechanical in vitro assessment of fixed angle plating using a new concept of locking for the treatment of osteoporotic proximal humerus fractures

Abstract

At a glance: The STEP trials

Springer Medicine

Abstract

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