Analysis of the difference in the tissue surfaces between the old and new upper complete dentures
10.3760/cma.j.issn.1002-0098.2009.04.009
- VernacularTitle:上颌全口义齿组织面变化的模型分析
- Author:
Cheng-Cai HUANG
1
;
Hai-Lan FENG
Author Information
1. 北京大学口腔医学院口腔医院
- Keywords:
Denture,complete;
Alveolar bone loss;
Laser scan
- From:
Chinese Journal of Stomatology
2009;44(4):232-235
- CountryChina
- Language:Chinese
-
Abstract:
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 buecal aspect [(42.9±13.8)%] was larger than that in lingual aspect [(35.5±15.2)%]. 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.
