E. I. Lezhnev, A. G. Shamsudinov*, A. V. Myznikova
ITEB RAS, Pushchino,
*CSRD, Moscow
Reconstructive age-specific processes
considerably accelerated at pathological conditions permanently take places
in the articular surfaces of the temporal-mandibular joint (TMJ). Posttraumatic
mandibular defects, defects appearing after the resection of a mandible
due to oncological diseases, congenital defects, and deformations of a
mandible are referred to a number of pathologies requiring prosthetic repair.
To increase effectiveness of the surgical procedure of treatment, deformation
and strength characteristics of the elements of TMJ are investigated. Usually
titanic plates of U-type profile are utilized for repairing TMJ. Prosthetic
ruptures frequently occur during prosthetic repair practice due to long-term
utilization. It is known that the destruction and the rupture of material
can have a fatigue character. In this case the rupture occurs at alternate
stresses smaller than the breaking point. We developed a device, which
allows one to test the prosthetic fatigue properties. The adequacy of the
processes of destruction of implanted prostheses and tested prostheses
was shown. The examinations of prosthetic fatigue properties allow one
to improve prostheses and to prolong their use.