Fiber-reinforced packable resin composites in Class II cavities.
OBJECTIVE
To evaluate the 6-year performance of two glass fiber-reinforced packable resin composites in Class II cavities.


METHODS
Sixty-three participants received 87 medium to large, cervically dentin bordered, Class II restorations of two fiber-reinforced resin composites, 42 Nulite F (N) and 45 Alert (A). The restorations were evaluated clinically, according to slightly modified USPHS criteria at baseline, after 6 months, and yearly during 6 years.


RESULTS
At 2 years the cumulative failure frequencies for N and A were 4.8% and 2.2%, respectively, which increased at 6 years to 25.0% and 12.8%. Reasons for failure were secondary caries, material and cusp fracture. The majority of the failures occurred after 3 years. Secondary caries occurred between 4 and 6 years. The incorporation of fibers resulted in very rough surface characteristics.


CONCLUSIONS
A rather high failure rate was observed for one of the fiber-reinforced resin composites, while the other fulfilled the ADA criteria. The occurrence of most failures after 3 years indicated the necessity of long-term evaluations of new materials.
van Dijken
Jan W V
JW
Dental Hygienist Education, Department of Odontology, Dental School, Umeå University, Umeå, Sweden. jan.van.dijken@odont.umu.se
Sunnegårdh-Grönberg
Karin
K
D000328:Adult; D000368:Aged; D001641:Bicuspid; D003188:Composite Resins; D019232:Dental Restoration Failure; D003793:Dental Restoration, Permanent / Q000379:methods*; D003804:Dentin; D005260:Female; D005898:Glass; D006801:Humans; D008297:Male; D008875:Middle Aged; D008963:Molar; D019237:Tooth Cervix
C406265:Alert composite resin; D003188:Composite Resins; C516055:Nulite F; C009753:fiberglass