Biomechanical Analysis of a Novel Wedge Locking Plate in a Porcine Tibial Model
Clinics in Orthopedic Surgery
;
: 373-378, 2016.
Article
in English
| WPRIM
| ID: wpr-81513
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.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Osteotomy
/
Tibia
/
Knee
/
Methods
Language:
English
Journal:
Clinics in Orthopedic Surgery
Year:
2016
Type:
Article
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