title: Effect of restoration size on the clinical performance of posterior "packable" resin composites over 18 months.
abstract: Fifty predominantly moderate or large Class II or multiple-surface Class I resin composite restorations were placed in molars under rubber dam isolation. The restorative systems used were: Alert Condensable (Jeneric/Pentron) and SureFil (Dentsply/Caulk). The restorations were classified according to size, with 7 small, 25 moderate and 18 large, of which 8 were cusp replacement restorations. Baseline, 6, 12 and 18-month double-blinded clinical evaluations were carried out using modified USPHS criteria. The independent variables: restorative material, restoration size and three other clinical factors, were tested using a Multiple Logistic Regression procedure to determine if any were predictive of failure. Of the 50 restorations, four failed by the 18-month recall, three failed due to fracture of the restoration and one due to secondary caries. Both restorative systems demonstrated a 92% success rate. No association between restoration size (p = 0.99) or restorative material (p = 0.65) and failure was found. Similarly, the additional variables, occlusal contact type, presence of occlusal wear facets and first or second molar, were not predictive of failure.
authors.affiliation: Department of Oral Rehabilitation, School of Dentistry, Medical College of Georgia, Augusta, GA, USA. wbrackett@mail.mcg.edu
authors.forename: William W
authors.initials: WW
authors.lastname: Brackett
authors.forename: William D
authors.initials: WD
authors.lastname: Browning
authors.forename: Martha G
authors.initials: MG
authors.lastname: Brackett
authors.forename: Rick S
authors.initials: RS
authors.lastname: Callan
authors.forename: John S
authors.initials: JS
authors.lastname: Blalock
mesh_terms: D003188:Composite Resins; D019232:Dental Restoration Failure; D003793:Dental Restoration, Permanent / Q000379:methods*; D004311:Double-Blind Method; D006801:Humans; D016015:Logistic Models; D008963:Molar
chemical_list: C406265:Alert composite resin; D003188:Composite Resins; C403464:SureFil packable composite