Biomechanical Analysis of a Novel Wedge Locking Plate in a Porcine Tibial Model.
10.4055/cios.2016.8.4.373
- Author:
Jeong Ku HA
1
;
Chul Hyun YEOM
;
Ho Su JANG
;
Han Eui SONG
;
Sung Jae LEE
;
Kang Hee KIM
;
Kyu Sung CHUNG
;
Mahendar Gururaj BHAT
;
Jin Goo KIM
Author Information
1. Department of Orthopedic Surgery, Seoul Paik Hospital, University of Inje College of Medicine, Seoul, Korea.
- Publication Type:Original Article
- Keywords:
Knee;
High tibial osteotomy;
Open wedge osteotomy
- MeSH:
Knee;
Methods;
Osteotomy;
Tibia
- From:Clinics in Orthopedic Surgery
2016;8(4):373-378
- CountryRepublic of Korea
- Language:English
-
Abstract:
BACKGROUND: The purpose of this study was to analyze biomechanical properties of a novel wedge locking plate in medial open wedge high tibial osteotomy (OWHTO) in a porcine tibial model. METHODS: A uniform 8-mm OWHTO was performed in 12 porcine tibiae. Six of them were subsequently fixed with the plate without a wedge, whereas the other 6 were additionally reinforced with a metal wedge of 8 mm. Biomechanical properties (stiffness, displacement of the osteotomy gap, and failure load) were evaluated under axial load. The different modes of failure were also investigated. RESULTS: The plate showed an axial stiffness of 2,457 ± 450 N/mm with a wedge and 1,969 ± 874 N/mm without a wedge. The maximum failure load was 5,380 ± 952 N with a wedge and 4,354 ± 607 N without a wedge. The plate with a wedge had a significantly greater failure load and significantly less displacement of medial gap at failure than that without a wedge (p = 0.041 and p = 0.002, respectively). The axial stiffness was not different between the two types of fixation. Most failures were caused by lateral cortex breakage and there was no implant failure. CONCLUSIONS: The novel wedge locking plate showed excellent biomechanical properties and an additional wedge provided significant improvement. This plate can be a good fixation method for OWHTO.
