Biomechanical comparison of 4 plate internal fixation methods for simulated fractures of acetabular posterior column
- VernacularTitle:髋臼后柱骨折不同方式钢板内固定的稳定性研究
- Author:
Xiaobo WU
;
Qi ZHANG
;
Mingke GUO
;
Yingze ZHANG
- Publication Type:Journal Article
- Keywords:
acetabulum;
fracture;
internal fixation;
biomechanics
- From:Journal of Third Military Medical University
2003;0(07):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the stability of 4 different methods of plate internal fixation for simulated posterior column fracture of the acetabulum.MethodsTwenty preserved cadaveric semipelvic specimens were divided into 4 groups randomly.Models of isolated posterior column fractures of acetabulum were established and then fixed with 1 of following 4 methods of plate internal fixation:2 screws at the each end of plate(group A),3 screws at the each end of plate(group B),1 screw each side in the closest allowable hole to the fracture and 2 screws at the each end of plate(group C),and 4 screws on each side of the fracture(group D).Under vertical compression load of 3 times' body weight,the displacements of the fracture site were measured and the shear rigidity of different internal fixation methods were compared.ResultsThe displacements of the fracture site in Group A,B,C,and D were 4.68?0.35,2.80?0.25,2.12?0.11 and 1.58?0.17 mm respectively,with a decreasing trend from Group A to D.The shear rigidity of internal fixation methods in Group A,B,C,and D were 129.42?9.60,228.91?12.05,285.21?26.16 and 414.71?34.29 N/mm respectively,with an increasing trend from Group A to D.The differences of both displacements and shear rigidity between each 2 groups were significant(P
