Evidence map›Paper›PMID 38761202›Full record

ArticleEuropean journal of orthopaedic surgery & traumatology : orthopedie traumatologie2024

Larger lateral hinges increase the probability of Takeuchi type II and III fractures in high tibial osteotomy.

Zahra Saghaei, Saeed Salehipour, Ata Hashemi

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Article in European journal of orthopaedic surgery & traumatology : orthopedie traumatologie, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

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2 citing papers in PubMed.

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3 authors.

Zahra SaghaeiBiomechanical Engineering Group, Department of Biomedical Engineering, Amirkabir University of Technology, Hafez Avenue, Tehran, 15875, Iran.
Saeed SalehipourBiomechanical Engineering Group, Department of Biomedical Engineering, Amirkabir University of Technology, Hafez Avenue, Tehran, 15875, Iran.
Ata HashemiBiomechanical Engineering Group, Department of Biomedical Engineering, Amirkabir University of Technology, Hafez Avenue, Tehran, 15875, Iran. a.hashemi@aut.ac.ir.ORCID http://orcid.org/0000-0001-9267-3568

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeLateral hinge fractures are the main complications in the high tibial osteotomy to treat varus deformities. The aim of present study is to answer the question whether the lateral hinge length (H) has an effect on the type of fracture and required force during the opening in high tibia osteotomy. It was hypothesized in this comparative research that extending the hinge length increased opening force and probability of a type II and type III fractures.

methodsA monoplanar medial open wedge osteotomy with different intact hinge lengths varying from 9 to 32 mm was performed in 20 ostrich bones. A biomechanical experiment using unidirectional tensile testing apparatus was performed to open the wedge, and the required force was increased until a 10 mm opening was reached; then, the presence of fracture in the lateral cortex and its direction were evaluated. Lateral hinge fracture type based on direction was classified as suggested by Takeuchi et al.

resultsFracture that grows along the osteotomy line (type I) was observed in 4 samples with the mean hinge length (H) of 11 ± 1.54 mm. For seven bones with Takeuchi fracture type II, with downward crack propagation, the mean H was 16 ± 3.36 mm. For the mean H of 25 ± 6.53 mm, the crack propagated upward to the cutting path, displaying a Takeuchi type III fracture in seven samples. The statistical analysis showed that the fracture type significantly depends on the hinge length (P value < 0.05). Also, the mean opening force significantly increased with hinge lengthening (P value < 0.05). The peak forces at crack initiation were 41.8 ± 21.9, 115.2 ± 41.5, and 167 ± 135.3 N, respectively, for the fracture types I, II, and III samples.

conclusionThe lateral cortical hinge length was significantly associated with hinge fracture type. The experimental tests indicated that the hinge lengthening increases the risk of type II and III fractures, as classified by Takeuchi.

Indexed as

OsteotomyTibiaAnimalsBiomechanical PhenomenaTibial FracturesFracture typeHigh tibial osteotomyHinge lengthLateral cortex fracture

Identifiers

PMID38761202

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