Avaliação da desadaptação e da inclinação dental de proteses totais superiores submetidas a diferentes metodos de processamento em função da sorção de agua com alteração na temperatura e pressão

AUTOR(ES)
DATA DE PUBLICAÇÃO

2001

RESUMO

The aim of this work was to evaluate the adaptation and change in dental inclination of the first molars in upper complete dentures in function of the curing method and water sorption shown by the resin, before changes in pressure and temperature of storage of the samples. Sbcty dentures were constructed and divided into 4 groups: (G I) cured in 73° C water/ 9 hours and water sorption of37° C for 30 days; (G 11) cured in 73° C water/ 9 hours and water sorption under a temperature of 60° C, pressure of 40 Libs/inch2 per hour; (G 111) curing by microwave energy 500W/3 minutes and water sorption of 37° C for 30 days; (G IV) cured by microwave energy 500W/ 3 minutes and water sorption under a temperature of 60° C, pressure of 40Libs/inch2 per hour. An analysis was made on the dental inclination in waxing (TO), curing (TI); polishing (T2) and water sorption (T3) periods. For the adaptation test, the base was analyzed in the first molar region, in seven pre-established points. These were made in the polishing period (TO) and after water sorption (TI). The obtained data were submitted to variance analysis and Tukey s test at a 5% significance level. These demonstrated that the most significant changes of dental inclination had occurred in ali groups after the processing of the samples (TI), being of 2,3°, 0,85°, 2,54° and 3,47° for groups I, 11, 111 and IV, respectively (p<0.05). It is concluded that: 1) The biggest changes in dental inclination occurred between the waxing and curing periods, an average of 2,29 degrees. 2) The changes in dental inclination during the polishing and after the phenomenon of water sorption were statistically insignificant. 3) There was no significant difference in tooth inclination between the curing methods by microwave energy and conventional water bath. 4) The methods of treatment used for water sorption influenced equally the occurred changes. 5) The best adaptation occurred in the palatine region for group IH, being in (TO) 0,142 mm and (TI) 0,134 mm. 6) In the flange region, it was observed the least variation in adaptation between TI and T2 (0,005 mm). In a general sense, there was an improvement in adaptation after water sorption

ASSUNTO(S)

acrylic resin microwave energy dimensional stability dentes - adaptação water sorption dental inclination resinas acrilicas

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