The influence of different osteosynthesis configurations with locking compression plates (LCP) on stability and fracture healing after an oblique 45° angle osteotomy

Plecko, Michael; Lagerpusch, Nico; Pegel, Birthe; Andermatt, Daniel; Frigg, Robert; Koch, Rudolf; Sidler, Michèle; Kronen, Peter; Klein, Karina; Nuss, Katja; Gédet, Philippe; Bürki, Alexander; Ferguson, Stephen J.; Stoeckle, Ulrich; Auer, Jörg A.; von Rechenberg, Brigitte (2012). The influence of different osteosynthesis configurations with locking compression plates (LCP) on stability and fracture healing after an oblique 45° angle osteotomy. Injury - international journal of the care of the injured, 43(7), pp. 1041-1051. Elsevier 10.1016/j.injury.2011.12.016

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Background Locking compression plates are used in various configurations with lack of detailed information on consequent bone healing. Study design In this in vivo study in sheep 5 different applications of locking compression plate (LCP) were tested using a 45° oblique osteotomy simulating simple fracture pattern. 60 Swiss Alpine sheep where assigned to 5 different groups with 12 sheep each (Group 1: interfragmentary lag screw and an LCP fixed with standard cortex screws as neutralisation plate; Group 2: interfragmentary lag screw and LCP with locking head screws; Group 3: compression plate technique (hybrid construct); Group 4: internal fixator without fracture gap; Group 5: internal fixator with 3 mm gap at the osteotomy site). One half of each group (6 sheep) was monitored for 6 weeks, and the other half (6 sheep) where followed for 12 weeks. Methods X-rays at 3, 6, 9 and 12 weeks were performed to monitor the healing process. After sacrifice operated tibiae were tested biomechanically for nondestructive torsion and compared to the tibia of the healthy opposite side. After testing specimens were processed for microradiography, histology, histomorphometry and assessment of calcium deposition by fluorescence microscopy. Results In all groups bone healing occurred without complications. Stiffness in biomechanical testing showed a tendency for higher values in G2 but results were not statistically significant. Values for G5 were significantly lower after 6 weeks, but after 12 weeks values had improved to comparable results. For all groups, except G3, stiffness values improved between 6 and 12 weeks. Histomorphometrical data demonstrate endosteal callus to be more marked in G2 at 6 weeks. Discussion and conclusion All five configurations resulted in undisturbed bone healing and are considered safe for clinical application.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Pre-clinic Human Medicine > Institute for Surgical Technology & Biomechanics ISTB

UniBE Contributor:

Gédet, Philippe; Bürki, Alexander and Ferguson, Stephen John

Subjects:

500 Science > 570 Life sciences; biology
600 Technology > 610 Medicine & health

ISSN:

0020-1383

Publisher:

Elsevier

Language:

English

Submitter:

Alexander Bürki

Date Deposited:

15 Dec 2015 09:44

Last Modified:

15 Dec 2015 09:44

Publisher DOI:

10.1016/j.injury.2011.12.016

PubMed ID:

22284334

BORIS DOI:

10.7892/boris.74292

URI:

https://boris.unibe.ch/id/eprint/74292

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