Biomaterial Database

[Biomechanics of the Chiari pelvic osteotomy]. 1991

N Shiba

Department of Orthopedic Surgery, Kurume University School of Medicine, Japan.

We have reviewed our findings on 476 hip joints that underwent a Chiari pelvic osteotomy (Chiari) between June 1983 and March 1990, employing computer simulation using non-linear analysis based on the rigid-body spring model (RBSM) proposed by Kawai. We further made estimates of the changes in the hip abduction force resulting from the Chiari. The abduction force was measured by a Cybex II machine, before and after Chiari, and they were compared with those from simulation modeling (using the abduction muscle model: ABMM) for the power change expected by Chiari. According to the results in the RBSM, the resultant force, the abduction force, deviation of the pelvis, and the joint stress improved outcome after Chiari. Chiari had a positive effect on the peak torque of the hip abduction, though the abduction force was not fully restored clinically. The simulation by ABMM, showed similar results with the abduction force decreasing with increasing degree of hip abduction. From these results, we have developed and established a new technique for the reattachment of the greater trochanter in Chiari.

UI	MeSH Term	Description	Entries
D010027	Osteotomy	The surgical cutting of a bone. (Dorland, 28th ed)	Osteotomies
D010384	Pelvic Bones	Bones that constitute each half of the pelvic girdle in VERTEBRATES, formed by fusion of the ILIUM; ISCHIUM; and PUBIC BONE.	Coxal Bone,Hip Bone,Innominate Bones,Bone, Coxal,Bone, Hip,Bone, Innominate,Bone, Pelvic,Bones, Coxal,Bones, Hip,Bones, Innominate,Bones, Pelvic,Coxal Bones,Hip Bones,Innominate Bone,Pelvic Bone
D003198	Computer Simulation	Computer-based representation of physical systems and phenomena such as chemical processes.	Computational Modeling,Computational Modelling,Computer Models,In silico Modeling,In silico Models,In silico Simulation,Models, Computer,Computerized Models,Computer Model,Computer Simulations,Computerized Model,In silico Model,Model, Computer,Model, Computerized,Model, In silico,Modeling, Computational,Modeling, In silico,Modelling, Computational,Simulation, Computer,Simulation, In silico,Simulations, Computer
D006621	Hip Joint	The joint that is formed by the articulation of the head of FEMUR and the ACETABULUM of the PELVIS.	Acetabulofemoral Joint,Acetabulofemoral Joints,Hip Joints,Joint, Acetabulofemoral,Joint, Hip,Joints, Acetabulofemoral,Joints, Hip
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D001696	Biomechanical Phenomena	The properties, processes, and behavior of biological systems under the action of mechanical forces.	Biomechanics,Kinematics,Biomechanic Phenomena,Mechanobiological Phenomena,Biomechanic,Biomechanic Phenomenas,Phenomena, Biomechanic,Phenomena, Biomechanical,Phenomena, Mechanobiological,Phenomenas, Biomechanic
D012189	Retrospective Studies	Studies used to test etiologic hypotheses in which inferences about an exposure to putative causal factors are derived from data relating to characteristics of persons under study or to events or experiences in their past. The essential feature is that some of the persons under study have the disease or outcome of interest and their characteristics are compared with those of unaffected persons.	Retrospective Study,Studies, Retrospective,Study, Retrospective