title: Class I and II composite resin restorations: 4-year clinical follow up.
abstract: The clinical properties and longevity of two posterior composite materials were studied during a 4-year period. 137 Class I and II restorations in 65 patients were evaluated directly using USPHS criteria. Araldite casts were used to categorize quantitatively the amount of occlusal wear according to the Leinfelder method. No differences could be found between the two materials regarding clinical properties and failure rate. The overall success rate was high (84%). The average occlusal deterioration after 4 years was about 140 microns.
authors.affiliation: Department of Pedodontics, Postgraduate Dental Education Center, Orebro, Sweden.
authors.forename: S A
authors.initials: SA
authors.lastname: Lundin
authors.forename: G
authors.initials: G
authors.lastname: Koch
mesh_terms: D000134:Acid Etching, Dental; D000293:Adolescent; D000328:Adult; D003116:Color; D003188:Composite Resins; D003737:Dental Cavity Preparation / Q000379:methods; D003793:Dental Restoration, Permanent / Q000009:adverse effects / Q000145:classification*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008689:Methacrylates; D008875:Middle Aged; D011140:Polyurethanes; D013499:Surface Properties; D014520:Urethane
chemical_list: D003188:Composite Resins; D008689:Methacrylates; D011140:Polyurethanes; C056413:Occlusin; C029824:urethane dimethacrylate luting resin; D014520:Urethane