Avaliação da temperatura gerada e do tempo gasto durante o preparo do tecido ósseo com a utilização de brocas de diferentes sistemas de implantes

• Autor(a) principal: Faria, Renata [UNESP]
• Data de Publicação: 2005
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/113979
• topic: Implantes dentários osseointegrados; Tecido conjuntivo; Regeneração óssea; Bone regeneration

The aim of this study was to evaluate the temperature rise and the amount of time to prepare the bone tissue with three types of implant drills: Conexão, Nobel and 3i. Specimens of bovine cortical femoral bone (blocks) and a special set-up were made for the test. Holes were made with 2 and 3 mm diameter drills, at a speed of 1.500 rpm with 2kg intermitent loading , under constant irrigation with saline solution (0,9% NaCl), at room temperature (24°C±1°C). The blocks were kept in 36°C±1°C water bath during drilling. The temperatures rises were measured with thermocouples placed at 5 and 13mm depth and 1mm distant from the holes and recorded with the aid of a data collector (ADS 2000 IP-Lynx, Brazil) operated by a personal computer. Data of temperature were subjected to Repeated Measures Anova (3 way), considering a factorial type of 2 x 3 x 2 (diameter X drill x depthness). The depthness was the repeated factor, α=5%. The time data were analysed by using RM Anova (2 way), considering a factorial type of 2 x 3 (diameter x drill) and post hoc pairwise comparisons using Tukey test, α = 5%. The results related to temperature showed that the best condition was obtained for the 2mm Conexão drill at 5mm depthness. (36,10±0,52°C) and the 2mm diameter Nobel drill had the least favorable scenary at a depthness of 13mm (38,84±1, 15°C) . With relation to time the best experimental condition was obtained to the 3mm Nobel drill (6,8±0,79s) and the least favorable was to the 2mm 3i drill (99,4±18,70s). The diameter effect was statistically significant, which means that no matter the type of drill, the 2mm diameter (59,13±31,10s) is higher than the 3mm one (11,67±4,89s). It was concluded that the highest values of temperature were obtained at 13mm depthness, regardless the type of drill. The increase in diameter leaded to a decrease in temperature for 3i and Nobel drills and a rise of ...