Two-centre evaluation of a resin composite/ self-etching restorative system: three-year findings.
OBJECTIVE
This two-centre study evaluated the clinical performance of Class I and Class II restorations of the giomer material Beautifil, placed using Fluorobond, a self-etching adhesive system, to determine the suitability of the test system as an alternative for the restoration of posterior teeth.


METHODS
A total of 108 restorations, comprising 72 Class II and 36 Class I restorations, was placed predominantly in molars (82%). Evaulations using modified USPHS/Ryge criteria were conducted at baseline and thereafter at 6 months and 1, 2, and 3 years. Die stone replicas of the restored teeth were examined retrospectively.


RESULTS
A total of 5 restorations was found to fail during the study-- 3 in the first year and 2 during the third year of the study. Occlusal marginal adaptation was less than ideal at baseline in 11% of cases, primarily as a consequence of overcontouring, as observed in the die stone replicas. The combined percentage Alpha ratings at 3 years were: colour match, 98%; marginal adaptation (occlusal), 78%; marginal adaptation (proximal), 97%; anatomic form (occlusal), 99%; anatomic form (proximal), 95%; surface roughness (occlusal), 100%; surface roughness (proximal), 100%; marginal staining (occlusal), 90%; marginal staining (proximal) 81%; interfacial staining (occlusal), 99%; interfacial staining (proximal), 100%; contacts (occlusal), 95%; contacts (proximal), 93%; sensitivity, 100%; secondary caries, 100%; lustre of restoration, 100%.


CONCLUSIONS
It is concluded that the 3-year performance of Fluorobond-bonded Beautifil for Class I and II restorations demonstrated some marginal changes, but most of the direct evaluation ratings were > 90% Alpha, with the performance observed being similar in the two centres.
Dental Institute, King's College London, UK. nairn.wilson@kcl.ac.uk
Nairn H F
NH
Wilson
Valeria V
VV
Gordan
Paul A
PA
Brunton
Margaret A
MA
Wilson
Russell J
RJ
Crisp
Ivar A
IA
Mjör
D000328:Adult; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry*; D016009:Chi-Square Distribution; D003188:Composite Resins / Q000737:chemistry*; D003738:Dental Cements / Q000737:chemistry*; D019232:Dental Restoration Failure; D003793:Dental Restoration, Permanent / Q000379:methods*; D005460:Fluorides, Topical / Q000737:chemistry*; D006801:Humans
C470433:Beautifil composite resin; D003188:Composite Resins; D003738:Dental Cements; D005460:Fluorides, Topical; C072652:FluoroBond; D017438:Bisphenol A-Glycidyl Methacrylate