background & aim: the artificial teeth are produced with same standards for all the ethnics and countries in the world. the purpose of this study was to establish a normative size distribution in a group of students and staffs of shahid beheshti university of medical sciences. methods & materials: 320 individuals participated in this descriptive study. a vernier caliper was used to measure the ...

Autotransplantation provides the possibility of a natural tooth rather than a prothesis or an osseointegrated implant to replace a missing tooth. The indications for autotransplantation are wide, but careful patient selection coupled with an appropriate technique is a prerequisite for a good functional and esthetic outcome. Autogenous tooth transplantation is the surgical movement of a tooth fr...

Introduction: Cracked tooth is a current hard tissue affection; the type of cracks directly affects selection treatment and restoration.Objective: To evaluate literature about cracked Tooth, its etiology, symptoms, diagnosis treatment.Methodology: A review was carried out in databases Scopus, PubMed Google Scholar with keywords

A diverse group of genes are involved in the tooth development of mammals. Several studies, focused mainly on mice and rats, have provided a detailed depiction of the processes coordinating tooth formation and shape. Here we surveyed 236 tooth-associated genes in 39 mammalian genomes and tested for signatures of selection to assess patterns of molecular adaptation in genes regulating mammalian ...

In this paper, the forming principle, meshing features and tooth surface equation were introduced. And the modal parameters distribution of cylindrical gears with arcuate tooth trace was researched. The results show: 1. The modulus was the biggest impact factor for modal and natural frequency of cylindrical gears with arcuate tooth trace, then tooth width, and the radius of tooth line have the ...