Saliva contamination effect on shear bond strength of self-etching primer with different debond times.
OBJECTIVE
To evaluate shear bond strengths (SBSs) of a self-etching primer (SEP) following saliva contamination at different stages of bonding at debond times of 5, 15, and 30 minutes and 24 hours.


METHODS
Two-hundred forty human premolars were divided into four groups: group 1, uncontaminated; group 2, saliva contamination after priming; group 3, saliva contamination before priming; and group 4, saliva contamination before and after priming. Four subgroups according to debond times of 5, 15, 30 minutes and 24 hours were composed. Metal brackets were bonded with an SEP (Transbond Plus) and light-cure adhesives paste (Transbond XT). SBS values and the adhesive remnants were determined.


RESULTS
The highest SBS was obtained at a debond time of 24 hours for the control group. This was significantly different from the other groups. SBSs at 5, 15, and 30 minutes showed no significant difference from each other in the control group (P>.05). Lowest SBSs were obtained at a debond time of 5 minutes for groups 1, 2, 3, and 4 (8.38, 7.10, 7.06, and 6.26 MPa, respectively) and were not significantly different from each other (P>.05). SBSs at 24 hours were not significantly different from each other for groups 2, 3, and 4 (P>.05). Significant differences were found in the adhesive remnant (P<.001).


CONCLUSIONS
SEP (Transbond Plus) may produce clinically acceptable bracket bonding after 5, 15, and 30 minutes from time of placement on the teeth, even with light and heavy saliva contamination.
Turk
Tamer
T
Department of Orthodontics, University of Ondokuz Mayis, Faculty of Dentistry, Samsun, Turkey.
Elekdag-Turk
Selma
S
Isci
Devrim
D
Cakmak
Fethiye
F
Ozkalayci
Nurhat
N
D000704:Analysis of Variance; D016009:Chi-Square Distribution; D017005:Dental Debonding; D045662:Dental Etching / Q000379:methods*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D004866:Equipment Contamination; D006801:Humans; D016910:Orthodontic Brackets; D019279:Resin Cements / Q000737:chemistry*; D012463:Saliva; D033081:Shear Strength; D013997:Time Factors
D017220:Dentin-Bonding Agents; D019279:Resin Cements; C429625:Transbond Plus Self-Etching Primer