The method is to gain the image of tooth profile and contact spot by using digital camera, to reconstruct diametrically the contact spot of hypoid gear through the computer graphics techniques, to make sure of the relative position on the edges between tooth surface and spot, and to evaluate the size, position and direction of contact spot, in order to provide foundation for in-line inspection ...

Dental wear caused by tooth care is a complex phenomenon that depends on the quality of the tooth material, the type of toothbrush and the brushing slurry. Tooth wear is commonly determined in abrasion experiments using a standardized toothbrush in contact with a radioactively labeled dentin sample (RDA method). The increase of radioactivity in the slurry is a direct and highly-sensitive indica...

Objectives: A descriptive study of exploratory character with the objective to determine the representation of a healthy tooth and an unhealthy tooth, associated with the concept of dental decay. Methods: Children of both genders (880), distributed in six age groups of low socio-economic level, some already having prior contact with the dentist and others not. Three instruments were used: a soc...

BACKGROUND Occlusal contact on the implant superstructures is important for successful treatment. The purpose of this study was to investigate the occlusal contact of single implant superstructures at the mandibular first molar immediately after seating from weak to strong clenching. METHODS Subjects were nine patients who had just been fitted with an implant prosthesis in the mandibular firs...

In critical conditions, gears operate with insufficient lubrication and efforts are made to improve the life of these gears against wear. A local gear-tooth defect such as a fatigue crack, pit, or chip weakens a tooth and causes transient events in the system. The magnitude and duration of these events depend mainly upon the severity of the defect and the contact ratio of the gear pair. If the ...

Dental implant prosthetics are extensively used as replacement for missing teeth in patients. However, interproximal contact loss between the and tooth has been reported by several studies. Because implants osseointegrated remain immobile within bone, wear of adjacent may impair tooth. Contact gauges commonly examination interdental separation natural dentition; however, effectiveness such fuze...