[Effects of various condylar operations on its compressive mechanical property and bone density].
OBJECTIVE
To investigate the changes and relationship of condylar mechanical properties and its material character after various condylar operations.


METHODS
Condylar compressive mechanical properties and its bone mineral content were analyzed quantitatively by compressive mechanical property measurement technique and dual energy X-ray absorptiometry in 6 and 6 adult dogs undergone either high shaping or reconstruction of condyles respectively, and compared with 12 normals.


RESULTS
Condylar elastic--limit load and displacement, its largest load and displacement were the highest in control, but stiffness and bone mineral content were the highest in high-shaping group, all data were the lowest in the reconstruction ones. There was marked and extremely marked linear positive relativity among condylar elastic--limit load, largest load, stiffness and bone density, in which all relative coefficients exceeded 0.862.


CONCLUSIONS
The changes of condylar shape induced by various operations directly influence its compressive mechanical properties and bone mineral content. There is linear positive relativity between condylar compressive mechanical properties and its bone mineral density.
Hu
K
K
Department of Stomatology, Chinese PLA General Hospital, Beijing 100853.
Hu
M
M
Fang
J
J
D000818:Animals; D001696:Biomechanical Phenomena; D015519:Bone Density; D004285:Dogs; D008297:Male; D008335:Mandibular Condyle / Q000503:physiopathology* / Q000601:surgery; D013704:Temporomandibular Joint / Q000503:physiopathology / Q000601:surgery