The effect of the amount of interdental spacing on the stress distribution in maxillary central incisors restored with porcelain laminate veneer and composite resin: A 3D-finite element analysis.
10.5395/JKACD.2010.35.1.030
- Author:
Junbae HONG
1
;
Seung Min TAK
;
Seung Ho BAEK
;
Byeong Hoon CHO
Author Information
1. Department of Conservative Dentistry, School of Dentistry, Seoul National University, Seoul, Korea. chobh@snu.ac.kr
- Publication Type:Original Article
- Keywords:
Three dimensional-finite element analysis;
Interdental space;
Porcelain laminate veneer;
Composite resin;
Bonding layer;
Stress distribution
- MeSH:
Dental Porcelain;
Diastema;
Incisor
- From:Journal of Korean Academy of Conservative Dentistry
2010;35(1):30-39
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
This study evaluated the influence of the type of restoration and the amount of interdental spacing on the stress distribution in maxillary central incisors restored by means of porcelain laminate veneers and direct composite resin restorations. Three-dimensional finite element models were fabricated to represent different types of restorations. Four clinical situations were considered. Type I, closing diastema using composite resin. Labial border of composite resin was extended just enough to cover the interdental space; Type II, closing diastema using composite resin without reduction of labial surface. Labial border of composite resin was extended distally to cover the half of the total labial surface; Type III, closing diastema using composite resin with reduction of labial surface. Labial border of the preparation and restored composite resin was extended distally two-thirds of the total labial surface; Type IV, closing diastema using porcelain laminate veneer with a feathered-edge preparation technique. Four different interdental spaces (1.0, 2.0, 3.0, 4.0 mm) were applied for each type of restorations. For all types of restoration, adding the width of free extension of the porcelain laminate veneer and composite resin increased the stress occurred at the bonding layer. The maximum stress values observed at the bonding layer of Type IV were higher than that of Type I, II and III. However, the increasing rate of maximum stress value of Type IV was lower than that of Type I, II and III.
