Department of Prosthodontics, Piracicaba Dental School, State University of Campinas, São Paulo, Brazil.
J Appl Oral Sci. 2003 Dec;11(4):332-6. doi: 10.1590/s1678-77572003000400011.
The purpose of this study was to investigate the displacement of teeth occurring in dentures following storage in water at a temperature of 37ºC. Ten maxillary dentures were constructed with Classico heat-cured acrylic resin using conventional metal flasks. Metallic reference pins were placed on the incisal border of the central incisors (I), buccal cusp of the first premolars (PM), and mesiobuccal cusp of the second molars (M). The acrylic resin was polymerized twelve hours after final flask closure in a water cycle at 74ºC for 9 hours. The flasks were removed from the thermo-curing unit after water cooling and then bench stored for 3 hours. After deflasking and finishing, the dentures were stored in water at a temperature of 37ºC for periods of 7, 30, and 90 days. Following deflasking and each storage period tested, the I-I (incisor to incisor), PM-PM (premolar to premolar), and M-M (molar to molar) transverse distances, and LI-LM (left incisor to left molar) and RI-RM (right incisor to right molar) anteroposterior distances were measured with a STM Olympus microscope, with accuracy of 0.0005 mm. Colleted data were submitted to ANOVA and Tukey test (5%). No statistically significant difference was observed in the displacement of teeth in the transverse and anteroposterior distances.
本研究旨在探究在 37°C 水温下储存时义齿内牙齿的位移情况。使用传统金属盒，以 Classico 热固性丙烯酸树脂制作了 10 副上颌义齿。在切缘（I）、第一前磨牙颊尖（PM）和第二磨牙近中颊尖（M）上放置了金属参考销。十二小时后，在 74°C 的水循环中聚合 9 小时，最后关闭金属盒。在水冷却后，从热固化单元中取出金属盒，然后在台面上储存 3 小时。脱模和修整后，义齿在 37°C 的水中储存 7、30 和 90 天。脱模后和每个储存期结束后，使用 STM Olympus 显微镜测量 I-I（切牙到切牙）、PM-PM（前磨牙到前磨牙）和 M-M（磨牙到磨牙）横向距离以及 LI-LM（左侧切牙到左侧磨牙）和 RI-RM（右侧切牙到右侧磨牙）前后距离，精度为 0.0005mm。收集的数据进行了方差分析和 Tukey 检验（5%）。在横向和前后距离上，牙齿的位移没有统计学上的显著差异。
