title: Clinical evaluation of three posterior composite and two amalgam restorative materials: 3-year results.
abstract: The clinical performance of three posterior composites and two amalgams was evaluated over 3 years. Three hundred and nine composites and 200 amalgams were reviewed at the 3-year recall. The following parameters were assessed: fractures, gingival condition, interproximal contacts, marginal adaptation, staining and colour match. Although there was no significant difference in the overall failure rate between the two types of material, there was a significantly higher incidence of fracture in the amalgam restorations. The amalgam failures were exclusively mechanical, whereas those affecting composites also included failures that were more biological in nature. A significantly higher proportion of the Class II composites failed to achieve an adequate approximal contact, but this was not reflected in a more adverse gingival response. Colour match, surface and marginal stain varied significantly within the composite group and appeared to be material-related. Overall, the materials Occlusion and P-30 were considered to be performing adequately. The clinical handling, colour match and radiopacity of Clearfil Posterior were considered to be unsatisfactory.
authors: Department of Clinical Dental Sciences, University of Liverpool.
authors: J
authors: J
authors: Cunningham
authors: L H
authors: LH
authors: Mair
authors: M A
authors: MA
authors: Foster
authors: R S
authors: RS
authors: Ireland
mesh_terms: D003116:Color; D003188:Composite Resins; D003723:Dental Amalgam; D003793:Dental Restoration, Permanent; D003799:Dental Stress Analysis; D004868:Equipment Failure; D005500:Follow-Up Studies; D006801:Humans; D019279:Resin Cements; D013499:Surface Properties; D014075:Tooth Discoloration; D014520:Urethane
chemical_list: C029849:Clearfil Bonding Agent; D003188:Composite Resins; D019279:Resin Cements; C056413:Occlusin; C048711:P-30 composite resin; D014520:Urethane; D003723:Dental Amalgam