Adaptation of composites to the dentin cavity wall.
The cavity adaptation of marketed composite resins was evaluated by measuring the contraction gap width in a cylindrical dentin cavity. Cavity walls were cleaned with neutralized 0.5 M EDTA and treated with an aqueous solution of 35% HEMA and a dentin bonding agent. The inorganic filler content was measured by weighing specimens before and after burning. When the composite which contained an inorganic component of less than 75 wt% was employed, a relatively low contraction value of less than 0.09% was obtained. On the other hand, for the composite with an inorganic component of more than 75 wt%, the gap values varied from 0.01 to 0.43%. However, using regression analysis, no statistically significant correlation was observed between the wall-to-wall polymerization contraction and the inorganic filler content.
Fujimitsu
T
T
Kato
H
H
Itoh
K
K
Wakumoto
S
S
D003188:Composite Resins; D003737:Dental Cavity Preparation; D003763:Dental Leakage; D003793:Dental Restoration, Permanent; D003804:Dentin; D006801:Humans
D003188:Composite Resins