title: Occlusal margin defects around different types of composite resin restorations in posterior teeth.
abstract: Using stone replicas of individual restorations from a clinical study investigating three types of posterior composite resins, four types of defects were identified on the occlusal margins. It was observed that particular types of defects were commonly associated with each type of composite resin. The microfilled composite usually exhibited crevice formation (marginal fracture), the small-particle hybrid showed evidence of both wear and crevice formation, and a coarse composite resin most noticeably exhibited wear. Fracture of excess composite was associated with the fine-textured composites.
authors.affiliation: University of Sydney, Department of Operative Dentistry, Australia.
authors.forename: R W
authors.initials: RW
authors.lastname: Bryant
authors.forename: N
authors.initials: N
authors.lastname: Marzbani
authors.forename: K V
authors.initials: KV
authors.lastname: Hodge
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D001641:Bicuspid; D003188:Composite Resins / Q000737:chemistry*; D003722:Dental Alloys / Q000737:chemistry; D003793:Dental Restoration, Permanent / Q000379:methods; D005069:Evaluation Studies as Topic; D005500:Follow-Up Studies; D006801:Humans; D008963:Molar; D011140:Polyurethanes / Q000737:chemistry*; D019279:Resin Cements; D013499:Surface Properties
chemical_list: D000180:Acrylic Resins; C029012:Composite Dental Resin; D003188:Composite Resins; D003722:Dental Alloys; D011140:Polyurethanes; D019279:Resin Cements; C065770:Herculite XR; C048711:P-30 composite resin; C033470:Dispersalloy