Biomaterial Database

Femoral head stresses following cortical bone grafting for aseptic necrosis. A finite element study. 1983

A R Penix, and S D Cook, and H B Skinner, and A M Weinstein, and R J Haddad

A two-dimensional finite element model was used to compare the femoral head stress distribution of an intact femur with that of a femur following core biopsy and biopsy with cortical grafting. There was a decrease in superior and lateral femoral head stresses of up to 50% by an incorporated and properly placed cortical graft. Core biopsy and cortical grafting short of the subchondral plate produced stress-concentrating effects. A medially placed cortical graft did not stress-relieve the superolateral femoral head. Thus, if cortical grafting is to be undertaken, the graft should extend from the lateral cortex to the subchondral plate, transfixing the length of the necrotic segment. Because of deleterious effects on femoral head stress distribution, core biopsy without cortical grafting should be discouraged or only very cautiously used.

UI	MeSH Term	Description	Entries
D008954	Models, Biological	Theoretical representations that simulate the behavior or activity of biological processes or diseases. For disease models in living animals, DISEASE MODELS, ANIMAL is available. Biological models include the use of mathematical equations, computers, and other electronic equipment.	Biological Model,Biological Models,Model, Biological,Models, Biologic,Biologic Model,Biologic Models,Model, Biologic
D004548	Elasticity	Resistance and recovery from distortion of shape.
D005269	Femur	The longest and largest bone of the skeleton, it is situated between the hip and the knee.	Trochanter,Greater Trochanter,Lesser Trochanter,Femurs,Greater Trochanters,Lesser Trochanters,Trochanter, Greater,Trochanter, Lesser,Trochanters,Trochanters, Greater,Trochanters, Lesser
D005270	Femur Head	The hemispheric articular surface at the upper extremity of the thigh bone. (Stedman, 26th ed)	Femoral Head,Femoral Heads,Femur Heads,Head, Femoral,Head, Femur
D005271	Femur Head Necrosis	Aseptic or avascular necrosis of the femoral head. The major types are idiopathic (primary), as a complication of fractures or dislocations, and LEGG-CALVE-PERTHES DISEASE.	Aseptic Necrosis of Femur Head,Avascular Necrosis of Femur Head,Necrosis, Aseptic, of Femur Head,Necrosis, Avascular, of Femur Head,Avascular Necrosis Of Femoral Head, Primary,Femoral Head, Avascular Necrosis Of,Ischemic Necrosis Of Femoral Head,Femur Head Necroses,Head Necrosis, Femur,Necrosis, Femur Head
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013314	Stress, Mechanical	A purely physical condition which exists within any material because of strain or deformation by external forces or by non-uniform thermal expansion; expressed quantitatively in units of force per unit area.	Mechanical Stress,Mechanical Stresses,Stresses, Mechanical
D016025	Bone Transplantation	The grafting of bone from a donor site to a recipient site.	Grafting, Bone,Transplantation, Bone,Bone Grafting