The Nippon Dental University School of Life Dentistry at Niigata >
10 学術雑誌論文 = Journal Article >
10 査読済論文 = Postprint >
|Title ||:||Effects of tooth bleaching on shear bond strength of brackets rebonded with a self-etching adhesive system|
|Authors ||:||Abe, Ryota|
|Issue Date ||:||Jan-2011 |
|Journal Title ||:||Odontology : Official journal of the Society of the Nippon Dental University|
|Start Page ||:||83|
|End Page ||:||87|
|Abstract ||:||The purpose of this study was to ascertain the effects of tooth bleaching on the shear bond strength of orthodontic brackets rebonded with a self-etching adhesive system. A total of 39 premolars were collected and divided into three equal groups: in group 1 bracket bonding was performed without bleaching treatment; Specimens in group 2 were bonded immediately after bleaching; and group 3 teeth were bleached, then immersed in artificial saliva and left for 7 days before bonding. The shear bond strength was measured, with the bonding/debonding procedures repeated once after the first debonding, and the bracket/adhesive failure modes were evaluated by the adhesive remnant index after each debonding. Excepting the mean shear bond strength for group 2 after the first debonding, the overall mean values reached the minimum clinical requirement of 6MPa. The mean values at the first and second debondings were significantly higher in groups 1 and 3 than in group 2. Between groups 1 and 3, significant differences were noted at the first debonding, but not at the second debonding. Group 2 showed significant differences in mean shear bond strength between the first and second debondings. Bond failure at the enamel-adhesive interface occurred more frequently in group 2 than in groups 1 and 3 after the first debonding. The bracket-rebonding procedure can recover the reduced shear bond strength caused by immediate bonding after bleaching to a clinically acceptable level, but not to the prebleaching level.|
|Keywords ||:||Tooth bleaching|
Shear bond strength
Self-etching adhesive system
|Type Local ||:||Journal Article|
|Appears in Collections||:||10 査読済論文 = Postprint|
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