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KMID : 0358920170440040419
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Journal of the Korean Academy of Pedodontics
2017 Volume.44 No. 4 p.419 ~ p.426
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Effect of Different Types of Bonding Agent and Application Methods on Shear Bond Strength of Orthodontic Bracket
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Lee Jae-Hee
Kim Jong-Soo
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Abstract
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Attachment of the orthodontic bracket conducted during the window opening procedure can result in failure due to various adverse conditions such as blood or saliva contamination, or other wet conditions. For the success of the bracket attachment, reduction of total operation time is crucial. The purpose of this literature is to evaluate the differences between the final resultant shear bond strength of the conventional method of using phosphoric acid and self-etching primer, and that of the operation time-reduced method in which the curing step is omitted subsequent to the primer application. A total of 40 human maxillary incisors were prepared. Group Ⅰ(control group) and Ⅱ were etched with 37% phosphoric acid and Group Ⅲ and Ⅳ were conditioned with self-etching primer. Attachment of the group Ⅰ and Ⅲ was conducted by manufacturer’s instructions. The operation time of Group Ⅱ and Ⅳ was reduced by eliminating the curing step after the primer application. The resultant shear bond strength of each group was measured and an adhesive remnant index (ARI) was recorded. The mean shear bond strength of group Ⅰ, Ⅱ, Ⅲ, and Ⅳ were 14.16 MPa, 8.33 MPa, 8.29 MPa, and 6.48 MPa respectively. Significant differences could only be found between the control group and the experimental groups (p < 0.05). The ARI indicated no significant difference among all groups.
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KEYWORD
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Shear bond strength, Orthodontic bracket, Self-etched bonding system, Conventional bonding system
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