친수성 프라이머를 이용한 교정용 브라켓 접착시의 전단결합강도에 관한 연구
Shear bond strength of orthodontic bracket with hydrophilic primer
박철완, 이재환, 명나혜,
소속 상세정보
박철완 ( ) - 단국대학교 치과대학 교정학교실
이재환 ( ) - 단국대학교 치과대학 교정학교실
명나혜 ( ) - 단국대학교 치과대학 교정학교실
KMID : 0361920020320040293
Abstract
The purpose of this study was to evaluate the clinical effectiveness of hydrophilic primer, which claim to retain adequate bond strength on moistened enamel resulting from moisture or saliva contamination, by comparing the shear bond strength and adhesive failure patterns of brackets bonded using hydrophilic primer and conventional hydrophobic primer.
Brackets were bonded to human premolars embedded in metal cylinders utilizing light cured adhesive, primed with either a hydrophilic primer(Transbond MIP primer) or a conventional hydrophobic primer(Transbond XT primer). Each sample was exposed to varying degrees of artificial saliva contamination during the priming process.
The shear bond strength was measured using a universal. testing machine, and the adhesive failure -patterns after debonding were visually examined by stereomicroscope and assessed using the adhesive remnant index(ARI):
The results were as follows
In dry conditions, no significant differences in shear bond strength between Transbond MIP and Transbond XT primers were found.
2. Transbond MIP primer exhibited a significantly higher shear bond strength than Transbond XT primer in salivacontaminated conditions, regardless of the degree of contamination.
3. When contaminated with one coat of saliva, Transbond MIP primer´ did not exhibit significant differences in shear bond strength compared to the dry condition. When contaminated with two coats of saliva, Transbond MIP primer exhibited a significantly lower shear bond strength compared to the dry condition.
4. The adhesive remnant index of the "adhesive failure pattern had a tendency to decrease, as the degree of saliva contamination increased Bracket-adhesive interface failure was observed in more than half of the saliva contaminated samples utilizing Transbond MIP primer, whereas the bond failure sites of the Transbond XT primer samples occurred almost exclusively at the adhesive-enamel interface in saliva-contaminated conditions.
The results of this study suggest that in cases where moisture control is difficult, Transbond MIP primer is an effective alternative to conventional hydrophobic primers.
키워드
전단결합강도;접착제 잔류 지수;친수성 프라이머;Shear bond strength;Adhesive remnant indes;Hydrophilic primer
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