Impact-fracture energy of human premolar teeth

Determination of the dynamics of restored teeth by 3D electronic speckle pattern interferometry

“…In teeth with large preparations, in contrast, deformation increases and differences emerge between the various restorative materials. A relationship between the effect of masticatory forces and cavity size has been previously reported [29,32,33]; however, the present results show, in addition, that deformation is more pronounced under cuspal loading as compared to loading of the restoration. The consequence of this finding for clinical practice is that we can expect to see a higher incidence of fracture in teeth, which are loaded mainly on the cusps than in teeth in which masticatory stress impacts primarily on the restoration.…”

The response of human premolars to cyclic loading

“…cyclic and static loading) show reasonable agreement between the extent of change of tooth shape from preparation procedures and tooth fracture strength, the results can have considerable clinical value. One such result from our dynamic loading experiments and the static loading experiments of Larson et al (1981), Carter, Sorensen & Johnson (1983) and Salis, Hood & Kirk (1987) is that the greater dynamic or static load, the quicker the fracture occurs.…”

Influence of cusp coverage on the fracture resistance of premolars with endodontic access cavities

“…In the present study premolars were used because these teeth are prone to fracture (Hansen 1988). Mandibular first premolars were excluded due to the anatomical differences between the crown and root axis and the higher resistance to fracture compared to other premolars (Salis et al. 1987).…”