Dimensional stability of two visible light-cured indirect inlay/onlay resin composite materials.
OBJECTIVE
To evaluate the dimensional stability over time of two visible light-cured indirect inlay/onlay resin composites.


METHODS
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.


RESULTS
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.
Lynde
T A
TA
Department of Prosthodontics, VCU/MCV School of Dentistry, Richmond 23298-0566, USA.
Schulman
L B
LB
Meiers
J C
JC
Whitehill
J M
JM
D000180:Acrylic Resins; D000704:Analysis of Variance; D001641:Bicuspid; D003188:Composite Resins; D018772:Dental Marginal Adaptation; D005069:Evaluation Studies as Topic; D007284:Inlays; D016014:Linear Models; D008855:Microscopy, Electron, Scanning; D008963:Molar
D000180:Acrylic Resins; D003188:Composite Resins; C060386:Triad resin; C069353:Brilliant Dentin resin