Dental Cutting: The Historical Development of Diamond Burs

An overview of in vitro abrasive finishing & CAD/CAM of bioceramics in restorative dentistry

“…These restorative procedures require the use of a dental bur held in a mechanically airdriven high-speed handpiece. Diamond burs have been used in dentistry for almost one hundred years [61], but the design and operating speeds of dental handpieces have changed dramatically during recent decades. Until the advent of the ultra-high-speed handpieces (300,000-400,000 rpm), there was a mechanical upper limit on the rotational speed of burs [59].…”

“…1. This includes the fabrication of bioceramics and studies of their mechanical/physical behaviors [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32], the performance evaluation of the prosthetic services [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49], the CAD/CAM technology for rapid profile generation for crowns/inlays/onlays/bridges [14,[50][51][52][53], and the intraorally dental handpiece finishing for final fitting [54][55][56][57][58][59][60][61][62][63]…”

“…Furthermore, several CAD/CAM systems have been developed and commercialized [50][51][52][53]. The abrasive machining characteristics and material removal mechanisms of several bioceramics have been investigated using dental handpieces and diamond burs under the simulated clinical dental conditions [54][55][56][57][58][59][60][61][62][63][64][65]. Although progress has made in the development of the bioceramics in dentistry, due to the fatal weakness of their brittleness, there are several arisen technical problems associated with the processes of CAD/CAM, the abrasive finishing, and the restorative services.…”

Dentine caries excavation: a review of current clinical techniques

“…[7][8][9] Even though the rotary bur is in universal use, there are still problems that need to be overcome. Five factors are potentially responsible for the discomfort and pain that is associated with cavity preparation: 10,11 · The sensitivity of vital dentine · Pressure on the tooth (ie mechanical stimulation), · Bone-conducted noise and vibration · The high-pitched noise of the air-turbine handpiece, and · Development of high temperatures at the cutting surface (ie thermal stimulation).…”

Abrasão Ultra-Sônica: Uma Alternativa Para a Confecção de Preparos Cavitários

“…Outro aspecto a ser abordado, é o da ação cortante das brocas convencionais em alta rotação, que tem sido discutida com base nos efeitos danosos sobre o dente mesmo sob refrigeração adequada (ANUSAVICE; KINCHELDE, 1987;SIEGEL;VON FRAUHNHOFER, 1998). Já no sistema ultra-sônico, esse efeito não ocorre, pois o fluxo de água oriundo do equipamento corre sem obstáculo sobre toda a ponta ativa/superfície aumentando a eficiência de corte (POSTLE, 1958;VIEIRA, VIEIRA, 2002).…”