Lithuanian University of Health Sciences, Medical Academy, Department of Orthodontics, Lithuania.
Associate Professor, Kaunas University of Technology Mechanical Engineering faculty, Kaunas, Lithuania.
Sci Rep. 2017 Apr 11;7(1):798. doi: 10.1038/s41598-017-00843-z.
The objective of this study was to determine the effects of teeth bleaching on the tensile bond strength of metal brackets bonded with light-curing adhesive system to the human enamel. 40 recently extracted human permanent molars were used for the study. The mesial buccal surface of each tooth was used as a control group and the distal buccal surface was used as an experimental group. Control group surfaces were not submitted to bleaching, while experimental group surfaces were bleached with in-office bleaching material containing 35% hydrogen peroxide. 30 days after the bleaching, identical premolar metal brackets were bonded to each surface using light-curing adhesive. Both groups were submitted to a tension test, using a universal machine. The tensile bond strength of brackets bonded to the bleached enamel was 15% lower than that of brackets bonded to the unbleached enamel. After debonding, more adhesive was left on the bracket base in experimental group than in the control group. The conclusion of this study was that bleaching with an in-office bleaching material containing 35% hydrogen peroxide reduced the tensile bond strength of orthodontic bracket adhesive to the enamel surface.
本研究旨在确定牙齿漂白对光固化粘接系统粘结到人类牙釉质上的金属托槽的拉伸粘结强度的影响。 40 颗最近提取的人类恒磨牙用于本研究。每颗牙齿的近颊面作为对照组，远颊面作为实验组。对照组表面未进行漂白，而实验组表面用含有 35%过氧化氢的诊室漂白材料进行漂白。漂白后 30 天，使用光固化粘接剂将相同的前磨牙金属托槽粘接到每个表面上。将两组均用万能试验机进行拉伸试验。粘结到漂白牙釉质上的托槽的拉伸粘结强度比粘结到未漂白牙釉质上的托槽低 15%。在脱落后，实验组的托槽基底上残留的胶粘剂比对照组多。本研究的结论是，用含有 35%过氧化氢的诊室漂白材料进行漂白会降低正畸托槽胶粘剂对牙釉质表面的拉伸粘结强度。
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