title: Microhardness of Class II composite resin restorations with different matrices and light positions.
abstract: The degree of polymerization, determined by surface hardness, has been related to the gingival marginal adaptation of posterior composite resin restorations. Poor marginal adaptation results from marginal leakage and failure of the restoration. This study compared the degree of polymerization, measured by microhardness, of a microfilled composite resin placed by use of different matrices. The effect on polymerization with the curing light in two positions was also evaluated.
authors.affiliation: Department of Operative Dentistry, Medical University of South Carolina, College of Dental Medicine, Charleston.
authors.forename: B T
authors.initials: BT
authors.lastname: Kays
authors.forename: W D
authors.initials: WD
authors.lastname: Sneed
authors.forename: D B
authors.initials: DB
authors.lastname: Nuckles
mesh_terms: D003188:Composite Resins / Q000737:chemistry*; D003793:Dental Restoration, Permanent / Q000145:classification / Q000295:instrumentation; D004867:Equipment Design; D006244:Hardness; D008027:Light; D008434:Matrix Bands; D008670:Metals; D010795:Phthalic Acids; D011092:Polyethylene Glycols; D011093:Polyethylene Terephthalates; D011108:Polymers / Q000737:chemistry; D013193:Stainless Steel; D013499:Surface Properties
chemical_list: D003188:Composite Resins; D008670:Metals; D010795:Phthalic Acids; D011093:Polyethylene Terephthalates; D011108:Polymers; D013193:Stainless Steel; C025539:Lavsan; D011092:Polyethylene Glycols