title: An evaluation of dental operative simulation materials.
abstract: The study was to evaluate the performance of different materials used in dental operative simulation and compare them with those of natural teeth. Three typical phantom teeth materials were compared with extracted permanent teeth by a nanoindentation system and evaluated by students and registered dentists on the drilling sensation of the materials. Moreover, the tool life (machinability) of new cylindrical diamond burs on cutting the sample materials was tested and the burs were observed. Although student and dentist evaluations were scattered and inconclusive, it was found that elastic modulus (E) and hardness (H) were not the main factors in determining the drilling sensation of the materials. The sensation of drilling is a reflection of cutting force and power consumption.An ideal material for dental simulation should be able to generate similar drilling resistance to that of natural tooth, which is the machinability of the material.
authors.affiliation: Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, Dunedin 9054, New Zealand. lihong.he@otago.ac.nz
authors.forename: Li-Hong
authors.initials: LH
authors.lastname: He
authors.forename: Lyndie
authors.initials: L
authors.lastname: Foster Page
authors.forename: David
authors.initials: D
authors.lastname: Purton
mesh_terms: D003755:Dental High-Speed Technique; D003764:Dental Materials / Q000737:chemistry*; D003776:Dental Porcelain; D055119:Elastic Modulus; D006244:Hardness; D006801:Humans; D010969:Plastics; D019736:Prostheses and Implants; D011795:Surveys and Questionnaires; D014070:Tooth; D014093:Tooth, Artificial
chemical_list: D003764:Dental Materials; D010969:Plastics; D003776:Dental Porcelain