Dimensional stability of two visible light-cured indirect inlay/onlay resin composite materials
Lynde, T.A.; Schulman, L.B.; Meiers, J.C.; Whitehill, J.M.
American Journal of Dentistry 9(4): 153-156
1996
ISSN/ISBN: 0894-8275 PMID: 9002790 Document Number: 464795
To evaluate the dimensional stability over time of two visible light-cured indirect inlay/onlay resin composites. Twenty working dies of a Class II preparation were constructed in type IV die stone from impressions of a master metal die. Working dies were randomly divided into two groups of 10 with Class II resin composite inlays fabricated using Brilliant Dentin (n = 10) and Triad inlay material (n = 10). Inlays were seated on the master metal die 1, 3 and 10 days after fabrication and resin replicas were made of the proximal gingival margin surface which were gold-sputtered and used for the measurement of gingival margin gap distances at four locations using an SEM micron measurement system. Triad inlays mean gingival margin gap measurement was significantly (P < 0.05) greater at 10 days versus 1 day. Brilliant Dentin inlays had no significant mean gingival margin gap measurement differences between any time periods. As a material, Triad inlays had significantly less gingival margin gap distances than the Brilliant Dentin inlays at all three time intervals.