title: Extensive composite molar restorations: 3 years clinical evaluation.
abstract: Abstract     Objective.  To evaluate the clinical performance of extensive direct composite restorations in molars after 1 and 3 years and to find out the importance of extent of the restorations and other factors related to their performance.  Materials and methods.  Seventy-four patients with a molar tooth in need of a restoration covering at least three surfaces and one cusp were selected. Patient-related factors were registered and the tooth was prepared and restored by using a nano-filled composite. A topographic system for classification of extensive posterior restorations was developed. At baseline, the operator recorded a clinical evaluation, using modified USPHS-criteria. After 1 and 3 years, an independent observer evaluated the restorations. Post-operative problems arising during the observation period were registered.  Results.  A change in clinical score from baseline to the 1 and 3 year recall was recorded for all clinical criteria. A total of nine restorations were graded as unacceptable after 3 years (3-year survival rate of 87.7% and a mean annual failure rate of 4.2%). Except for gender (p = 0.022), none of the patient-related factors investigated (age, caries risk, extension of the restoration and presence of cervical enamel) had a significant influence on the survival of the restorations.  Conclusions.  Extensive direct posterior composite restorations showed an acceptable clinical performance after 3 years. Men had a significantly greater restoration failure rate than women.
authors.affiliation: Department of Clinical Dentistry, Faculty of Medicine and Dentistry, University of Bergen, Bergen, Norway. torgils.lagreid@iko.uib.no
authors.forename: Torgils
authors.initials: T
authors.lastname: Laegreid
authors.forename: Nils Roar
authors.initials: NR
authors.lastname: Gjerdet
authors.forename: Ann-Katrin
authors.initials: AK
authors.lastname: Johansson
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D003188:Composite Resins; D004245:DMF Index; D003731:Dental Caries / Q000145:classification / Q000473:pathology*; D003737:Dental Cavity Preparation / Q000145:classification; D019232:Dental Restoration Failure / Q000706:statistics & numerical data*; D003793:Dental Restoration, Permanent / Q000145:classification* / Q000379:methods*; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D008963:Molar; D053761:Nanocomposites; D011446:Prospective Studies; D018570:Risk Assessment; D012737:Sex Factors
chemical_list: D003188:Composite Resins; C474035:Filtek Supreme