Resumo

SOARES, Carlos José; FONSECA, Rodrigo Borges; GOMIDE, Henner Alberto  e  CORRER-SOBRINHO, Lourenço. Cavity preparation machine for the standardization of in vitro preparations. Braz. oral res. [online]. 2008, vol.22, n.3, pp. 281-287. ISSN 1806-8324.  http://dx.doi.org/10.1590/S1806-83242008000300016.

Several in vitro studies employ the confection of cavity preparations that are difficult to standardize by means of manual high speed handpieces. This study presents the development of a cavity preparation machine designed to standardize in vitro cavity preparations. A metal base of 25 mm x 25 mm x 4 mm (length x width x height) was coupled to a small mobile table which was designed to be able to move by means of two precision micrometers (0.01-mm accuracy) in the horizontal directions (right-left, and back-front). A high speed handpiece was coupled to a metallic connecting rod which had an accurate dial indicator enabling control of the vertical movement. The high speed handpiece is also able to move 180° around its longitudinal axis and 360° around its transversal axis. The suggested cavity preparation machine precisely helps in the standardization of cavity preparations for in vitro studies.

Palavras-chave : Dental cavity preparation; Laboratory techniques and procedures; Laboratory equipment.