摘要
目的通过对患者的新、旧上颌全121义齿组织面模型进行分析，探讨上颌牙槽嵴的吸收规律。方法选择26例更换全口义齿的患者，复制其新、旧上颌全口义齿组织面模型，利用激光扫描仪进行三维扫描，采集数据，通过Geomagic Studio 8和Rapidform2006软件进行配准，建立20个垂直于颌弓曲线的截面，计算各截面宽度和面积的差异，对新上颌全口义齿组织面相对于旧义齿的形态改变进行分析。结果相对于旧义齿，新上颌全口义齿组织面牙槽嵴面积的减少比例[（39．8±14．2）％]比宽度的减少比例[（28．2±16．0）％]大；对于牙槽嵴面积的减少比例，前牙区[（43．0±15．2）％]比后牙区[（36．1±14．1）％]大，颊侧[（42．9±13．8）％]比舌侧[（35．5±15．2）％]大，差异均有统计学意义（P〈0．05）。结论本项研究结果显示，从三维角度分析牙槽嵴整体形态的变化更有意义，并从三维角度证实上颌牙槽嵴颊侧吸收比例比舌侧大，前牙区牙槽嵴的吸收比例比后牙区大。
Objective To investigate the reduction in residual ridges of maxillary edentulous models duplicated from old and new complete dentures using the 3-D data analysis. Methods Twenty-six pairs of maxillary edentulous models copied from the fitting surfaces of new and old upper complete dentures were selected for this study. The 3-D data were collected with a laser scanning system. The data were matched using Geomagic Studio 8 and Rapidform2006 software and then the fitting surfaces of new complete dentures were analyzed in comparison with old ones. Results The total amount of morphologic change of fitting surface [ （39.8 ± 14. 2）% ] was greater than the change of width [ （28. 2 ± 16. 0）% ] ; the area reduction of the residual ridge in anterior region [ （43.0±15.2 ）% ] was larger than that in posterior region [ （36. 1 ±14. 1 ） % ] ; and the area reduction of residual ridge in buccal aspect [ （42. 9 ± 13.8 ） % ] was larger than that in lingual aspect [ （35.5 ± 15.2） % 1. All the differences were statistically significant （P 〈 0.05）. Conclusions The results of this study reveal that 3-D analysis of the whole change of the residual ridge is significant and verify that the residual ridge resorption of edentulous maxilla in three dimensions is greater in buccal aspect than in lingual aspect and greater in anterior region than in posterior region.
出处
《中华口腔医学杂志》
CAS
CSCD
北大核心
2009年第4期232-235,共4页
Chinese Journal of Stomatology
基金
“十一五”国家科技支撑计划（2007BAI18805）
