Inclinação dental em protese total em função de diferentes tecnicas de inclusão

AUTOR(ES)
DATA DE PUBLICAÇÃO

2004

RESUMO

The purpose of this study was to evaluate first molar inclination in maxillary and mandibular complete dentures processed in monomaxilary and bimaxillary flasks by microwave irradiation (at 20 % power for 20 minutes and 60% power for 5 minutes). Forty pairs of type-III-stone models were obtained, and complete dentures were waxed and standardized with a special appliance. Dentures were divided in four groups, according to flasking and processing procedures: group 1 ? flasking with stone in monomaxillary flasks; group 2 ? flasking with silicone rubber and stone in bimaxillary flasks; group 3 --? flasking with stone in bimaxillary flasks; group 4 ? acrylic resin retentions were confectioned on buccal tooth surfaces, and flasking were taken with silicone rubber in bimaxillary flasks. For each tooth, two reference points were determined (in mesiopalatine and distobuccal cusps for maxillary first molars and in mesiobuccal and distolingual cusps for mandibular first molars). A linear comparator microscope (Olympus, 0.0005 mm tolerance) was used to measure the distance between two reference points, determining a triangle side. Using Pitagora?s Theorem and Cossen Law, tooth inclination angles were calculated. Data were submitted to Correlation test and Kruskal-Wallis (5% significance). There was no correlation between right and left side angles and no correlation between maxillary and mandibular angles for all groups. For maxillary right angle, there were significant statistical differences (p<0.05) before and after processing among groups I (39.64° and 40.79°, respectivelly), II (38.20° and 39.66°) and III (39.14° and 40.12°). However, for group IV, there was no significant statistical difference (p>0.05) before and after processing (39.49° and 40.73°). For mandibular right angle, there were significant statistical differences (p<0.05) before and after processing between groups II (37.92° and 38.47°) and IV (39.54° and 40.22°). However, there was no significant statistical difference (p>0.05) between groups I (38.11° and 38.22°) and III (39.46° and 39.60°). For maxillary left angle, there were significant statistical differences (p<0.05) before and after processing among groups I (38.89° and 39.95°), II (39.47° and 40.26°), III (38.45° and 40.11°) and IV (41.98° and 43.04°). For mandibular left angle, there were significant statistical differences (p<0.05) between groups III (40.35° and 39.81°) and IV (39.82° and 40.25°). However, there was no significant statistical difference (p>0.05) before and after processing between groups I (39.57° and 40.34°), and II (38.84° and 39.69°). Regarding angle mean values, there was no significant statistical difference (p<0.05) before and after processing for all groups. It could be concluded that alterations observed in tooth inclination were similar for all flasking and processing procedures

ASSUNTO(S)

resinas acrilicas protese dentaria completa

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