51471
document
Effect of ozone application on the resin-dentin microtensile bond strength . When ozone is used during caries treatment , bond strength can be compromised by the release of oxygen . The use of antioxidant agents neutralizes the free oxygen . The aim of this study was to evaluate the effects of ozone and sodium ascorbate on resin-dentin microtensile bond strength ( μTBS ) . Forty human third molars were divided into four groups : Group 1 , not treated with ozone ; Group 2 , ozone application followed by acid etching ; Group 3 , acid etching followed by ozone application ; and Group 4 , ozone and application of sodium ascorbate . Bonded beams ( 1.0 mm ( 2 ) ) were tested under tension ( 0.5 mm min ( -1 ) ) . The μTBS values were analyzed using one-way analysis of variance ( ANOVA ) and the Tukey test ( p=0.05 ) . All beams that fractured were analyzed under stereomicroscopy ( 40× ) . Group 1 had significantly higher μTBS values than Group 2 or 3 . The μTBS values of Groups 1 and 4 were similar and higher than those of Group 2 . The use of ozone in Group 2 resulted in lower values of μTBS in all conditions evaluated . The predominant failure mode was adhesive . The application of ozone decreased the μTBS of the dentin-composite resin interface . These values were reversed when compared with Groups 1 and 2 when sodium ascorbate was used .
51472
Intervention_Physical
ozone application
51473
Intervention_Physical
ozone
51474
Intervention_Physical
sodium ascorbate
51475
Outcome_Other
resin-dentin microtensile bond strength
51476
Outcome_Other
resin-dentin microtensile bond strength ( μTBS )
51477
Outcome_Other
μTBS
51478
Outcome_Other
μTBS values
51479
Outcome_Other
μTBS values
51480
Participant_Sample-size
Forty