치과용 금합금의 표면처리에 따른 교정용 브라켓의전단결합강도 변화
Change of shear bond strength of orthodontic brackets acording to surface treatment on dental gold alloy
민지현, 황현식, 강정채,
소속 상세정보
민지현 ( ) - 전남대학교 치과대학 교정학교실
황현식 ( ) - 전남대학교 치과대학 교정학교실
강정채 ( ) - 전남대학교 치과대학 교정학교실
KMID : 0361920000300040483
Abstract
The dental gold alloy shows a lower bond strength than the natural teeth in bracket bonding, and this can be a possible source of subsequent bond failure. This study aims to evaluate the effect of various gold alloy surface treatment techniques on shear bond strength between the orthodontic adhesives and the gold alloy and to find ways of increasing the bond strength. Two hundred and forty specimens made of the dental gold alloy were
divided into twelve groups based on the combination of surface treatment methods(non-surface treatment, sandblasted, sandblasted plus tin-plated, and sandblasted plus intermediate adhesive) and adhesive systems (Ortho-one, Panavia 21, Superbond C&B). The specimens with bonded brackets were placed in distilled water at 371C for 24 hours and shear bond strength was measured by a universal testing machine.
The results were as follows:
1. All surface-treated groups showed a significantly higher shear bond strength than non-surface-treated groups. 2. The sandblasted plus tin-plated grout showed a significantly higher shear bond strength than the sandblasted group only when Panavia 21 was involved.
3. The sandblasted plus intermediate adhesive group showed a significantly higher shear bond strength than sandblasted group regardless of the type of adhesive used.
4. Of.the three resin adhesive types, the Superbond C&B showed the highest bond strength, followed by Panavia 21 and Ortho-one.
These findings suggest that a combination of sandblasting and intermediate resin treatment is desirable in order to enhance bracket bond strength regardless of adhesive types.
키워드
결합강도;브라켓;표면처리;금합금;Bond strength;Bracket;Surface treatment;Gold alloy
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