Effect of a triclosan/copolymer/fluoride dentifrice prophylaxis on the shear bond strength of a composite resin to enamel.
A new fluoride dentifrice formulation containing triclosan and a copolymer has been introduced. The purpose of this study was to evaluate the shear bond strength of a resin composite bonded to enamel previously cleaned with this new dentifrice formulation. A total of 45 human extracted permanent molars were used. A flat enamel surface was obtained with 600 grit SiC paper and the teeth randomly distributed into 3 groups of 15 teeth each: Group 1: Pumice prophylaxis with a rubber cup and slow-speed handpiece; Group 2: Prophylaxis with a conventional fluoridated dentifrice (Colgate); Group 3: Prophylaxis with a triclosan/copolymer/NaF dentifrice (Colgate). After prophylaxis, the teeth were acid-etched with a 37% phosphoric acid gel for 30 seconds, rinsed and dried. An unfilled resin (Coe Bond) was thinly applied with a brush and cured for 30 seconds. A nylon ring was placed over the area and filled with a light-cured resin composite (Occlusin). The teeth were thermocycled for 100 cycles, mounted in plastic cups and plaster, and sheared with a knife-edged blade in an Instron running at a crosshead speed of 1 mm/min. The results in MPa were as follows: Group 1: 11.34 +/- 4.57; Group 2: 13.46 +/- 3.60; Group 3: 13.84 +/- 4.33. An ANOVA showed that there was no statistically significant difference among the groups. Fracture within the enamel occurred in 27% in Group 1, 47% in Group 2, and 67% in Group 3. The results support the use of the fluoride dentifrices tested in this study for prophylaxis prior to bonding procedures.
Department of Pediatric Dentistry, University of Texas Health Science Center at San Antonio, TX 78284-7888.
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F
Garcia-Godoy
J A
JA
O'Quinn
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M
Donohue
D000704:Analysis of Variance; D003188:Composite Resins; D001840:Dental Bonding; D003777:Dental Prophylaxis; D003802:Dentifrices; D005459:Fluorides / Q000008:administration & dosage*; D006801:Humans; D017640:Silicates; D012824:Silicic Acid; D013718:Tensile Strength; D014260:Triclosan
D003188:Composite Resins; D003802:Dentifrices; D017640:Silicates; D012824:Silicic Acid; D014260:Triclosan; C005144:pumice; D005459:Fluorides