Development of chemical vapor deposition diamond burrs using hot filament

Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-27T11:18:05Z No. of bitstreams: 0Bitstream added on 2014-05-27T14:28:22Z : No. of bitstreams: 1 2-s2.0-0000950115.pdf: 514956 bytes, checksum: 6c9c0de1741231e5c99740d865b2cd63 (MD5) Made available in DSpace on 2014-05-27T11:18:05Z (GMT). No. of bitstreams: 0 Previous issue date: 1996-05-01 The fabrication of boring tools (burrs) for dentistry with the use of a hot-filament chemical vapor deposition (CVD) system, to form the diamond abrading structure, is reported here. The diamond was synthesized from a methane/freon gas mixture diluted in hydrogen. Comparative drilling tests with conventional diamond burrs and the CVD diamond burrs in borosilicate glasses demonstrated a lifetime more than 20 times larger for the CVD diamond burrs. Also, heat flow experiments in dentine showed that the CVD diamond burrs induce temperature gradients of the same order as the conventional ones. These characteristics of the CVD diamond burrs are highly desirable for odontological applications where the burrs' lifetime and the low temperature processing are essential to the quality and comfort of the treatment. © 1996 American Institute of Physics. Inst. Nac. de Pesquisas Espaciais, 12201-970 Sao Jose dos Campos, SP Universidade Estadual Paulista, 12245-001 Sao Jose dos Campos, SP Universidade Estadual de Campinas, 13081-970 Campinas, SP Universidade Estadual Paulista, Presidente Prudente, SP Universidade Estadual Paulista, 12245-001 Sao Jose dos Campos, SP Universidade Estadual Paulista, Presidente Prudente, SP