title: A comparison between the microleakage of direct and indirect composite restorative systems.
abstract: The present study compares the microleakage of direct and indirect restorations. Two dentine bonding agents were evaluated with both techniques. Class V cavities, approximately 2 mm in depth and 4 mm in diameter, were prepared in extracted human molars. Cavities were placed in either mesial or distal surfaces and were centred at the amelodentinal junction. Microleakage was rated after silver nitrate staining. With both dentine bonding agents, the indirect method resulted in significantly (P less than 0.001) reduced microleakage. Choice of adhesive for the indirect method was also significant, perhaps due to polymerization shrinkage of the composite cement used for placement. It is suggested that the indirect method may be less technique sensitive and less dependent on the early bond strengths of different adhesives.
authors.forename: W H
authors.initials: WH
authors.lastname: Douglas
authors.forename: R P
authors.initials: RP
authors.lastname: Fields
authors.forename: J
authors.initials: J
authors.lastname: Fundingsland
mesh_terms: D000134:Acid Etching, Dental; D003188:Composite Resins; D001840:Dental Bonding; D003737:Dental Cavity Preparation; D003743:Dental Enamel; D003763:Dental Leakage / Q000209:etiology*; D003775:Dental Polishing; D003793:Dental Restoration, Permanent / Q000379:methods*; D006801:Humans
chemical_list: D003188:Composite Resins