Caetano Conrado Reinoldes, Consani Rafael Leonardo Xediek, Bacchi Ataís, Correr Américo Bortolazzo, Dos Santos Mateus Bertolini Fernandes
Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil.
J Prosthodont Res. 2013 Jul;57(3):213-8. doi: 10.1016/j.jpor.2013.04.001. Epub 2013 Jun 15.
To evaluate the influence of different metallic flask systems for acrylic resin denture processing on tooth displacement and framework misfit of mandibular fixed implant-supported complete dentures.
Standard mandibular implant-supported complete dentures in five implants were waxed and randomly assigned to three groups: G1 - conventional flask, G2 - double flask, and G3 - occlusion flask. Framework misfit in all the implants and the linear distances between teeth (I-I - incisor-to-incisor; P-P - premolar-to-premolar; M-M - molar-to-molar; RI-RM - right-incisor-to-right-molar; and LI-LM - left-incisor-to-left-molar) were measured before and after denture processing using an optical microscope. Dentures were processed by hot water curing cycle (9h/74°C). Collected data were analyzed by paired Student's t-test and one-way ANOVA (α=0.05).
All the measured distances presented changes in tooth displacement after denture processing. However, the M-M distance for G1 (p=0.003) and the P-P (p=0.042) and LI-LM (p=0.044) distances for G3 showed statistically significant differences. Differences between the flask systems were not statistically significant. Statistically significant differences in the framework misfit due to denture processing were found for all the implants and groups, with the exception of right median implant for G2 and right distal implant for G3. A comparison of the flask systems found statistically significant differences in which G1 presented an increase in the misfit values and G2 and G3 a decrease.
Different flask systems did not cause significant changes in tooth displacement. Frameworks misfit values were influenced by the different flask systems. The conventional flask presented an increase in the framework misfit, while the experimental flasks showed a decrease.
评估不同金属型盒系统用于制作丙烯酸树脂义齿对下颌种植固定全口义齿牙齿移位和支架贴合度的影响。
为五颗种植体支持的标准下颌全口义齿制作蜡型，并随机分为三组：G1组 - 传统型盒，G2组 - 双层型盒，G3组 - 咬合型盒。使用光学显微镜在义齿制作前后测量所有种植体的支架贴合度以及牙齿之间的线性距离（I-I - 切牙到切牙；P-P - 前磨牙到前磨牙；M-M - 磨牙到磨牙；RI-RM - 右切牙到右磨牙；LI-LM - 左切牙到左磨牙）。义齿通过热水固化循环（9小时/74°C）制作。收集的数据采用配对t检验和单因素方差分析进行分析（α=0.05）。
义齿制作后，所有测量距离均出现牙齿移位变化。然而，G1组的M-M距离（p=0.003）以及G3组的P-P距离（p=0.042）和LI-LM距离（p=0.044）显示出统计学上的显著差异。型盒系统之间的差异无统计学意义。除G2组的右中种植体和G3组的右远中种植体外，所有种植体和组在义齿制作导致的支架贴合度方面均存在统计学上的显著差异。型盒系统比较发现存在统计学上的显著差异，其中G1组的贴合度值增加，G2组和G3组降低。
不同型盒系统未导致牙齿移位出现显著变化。支架贴合度值受不同型盒系统影响。传统型盒使支架贴合度增加，而实验型盒则使其降低。
