Because repetitive loading is characteristic for the oral biomechanical environment, dental systems are subjected to fatigue. Failure mechanisms and crack propagation are studied through the measurement of progressive changes in structural compliance during fatigue loading in a dedicated servo-hydraulic MTS testing system.
The MDRCBB makes extensive use of the small rod methodology, which is appropriate to small amounts of synthesized materials for structures of tooth size dimensions. The methodology gives extensive information about failure mechanisms in brittle and visco-elastic materials. The methodology was refined by Dr. Chun-Pin Lin (currently dean of the National Taiwan University School of Dentistry) in 1993 and further developed by Dr. William Y. Cheng (Engineering Fracture Mechanics, 61: 343-353, 1998). Fracture resistance is a major requirement of dental hard tissues and their synthetic replacement. It is a major parameter in the development and optimization of new materials for clinical chairside use.