Journal of the korean academy of Pediatric Dentistry (대한소아치과학회지)

Korean Academy of Pediatric Dentistry (대한소아치과학회)
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A COMPARATIVE STUDY OF THE SHEAR BOND STRENGTH AND ADHESIVE FAILURE PATTERN OF METAL BRACKETS BONDED ON NATURAL TEETH AND PORCELAIN TEETH

자연 치관과 포세린 치관상에서 교정용 브라켓 부착시 전단 결합 강도와 파절 양상에 관한 비교 연구

  • Lee, Hyun-Sun (Dept. of Pediatric Dentistry, School of Dentistry, Dankook University) ;
  • Kim, Jong-Soo (Dept. of Pediatric Dentistry, School of Dentistry, Dankook University) ;
  • Yoo, Seung-Hoon (Dept. of Pediatric Dentistry, School of Dentistry, Dankook University)
  • 이현선 (단국대학교 치과대학 소아치과학교실) ;
  • 김종수 (단국대학교 치과대학 소아치과학교실) ;
  • 유승훈 (단국대학교 치과대학 소아치과학교실)
  • Published : 2008.05.30
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Abstract

Orthodontic brackets often need to be bonded to porcelain such as porcelain fused to metal crowns and porcelain jacket crowns. The purpose of this study was to evaluate the clinical usability of direct bonding system on porcelain teeth by measuring shear bond strength according to various conditions and observing adhesive failure patterns. The specimens, 20 maxillary premolars and 80 porcelain teeth that were produced by duplication of the labial surface of a maxillary first premolar were used and randomly divided into four groups of twenty teeth each. The 5 different preparation procedures tested: (1) application of 37% phosphoric acid on natural teeth, (2) sandblasting on porcelain surfaces, (3) sandblasting and application of 9.6% hydrofluoric acid on porcelain surfaces, (4) sandblasting and application of silane on porcelain surface, (5) sandblasting and application of 9.6% hydrofluoric acid and silane on porcelain surfaces. The metal brackets were bonded with Transbond $XT^{(R)}$ bonding material. The shear bond strength was tested by the micro universal testing machine(Kyung-Sung, Korea) and the amount of residual adhesive on the tooth surface after debonding was examined by stereoscope and assessed with an adhesive remnant index. The results of this study suggest that the direct bonding system on porcelain teeth with sandblasting, HF and porcelain primer is clinically useful.

치아 우식증과 침식증의 진단과 본 연구는 교정용 밴드 사용의 대안으로 제시된 직접 부착 술식이 보철 치료를 받은 치아상에서도 적절한 결합 강도를 갖으면서 임상적으로 유용하게 사용될 수 있는지를 평가하고, 불산과 포세린 전처리제의 사용 여부에 따른 결합 강도와 접착 파절 양상의 차이에 대해 알아보고자 시행하였다. 사람의 상하악 소구치 치관 20개를 대조군으로, 소구치의 협면을 복제한 포세린 치관 80개를 실험군으로 나눈 후, 대조군은 37% 인산으로 산부식한 후 Transbond $XT^{(R)}$를 이용하여 금속 브라켓을 접착하였고, 실험군들은 모두 포세린 치관에 통상적으로 sandblasting 처리를 하되, 9.6% 불산으로 4분간 부식처리를 함께 한 군, 포세린 전처리제를 적용한 군, 마지막으로 sandblasting과 불산 그리고 포세린 전처리제를 모두 적용한 군으로 20개씩 나눈 후 금속 브라켓을 접착하였다. 각 군간 전단 결합 강도와 접착 파절 양상을 비교하여 관찰한 결과, 포세린 치관에 금속 브라켓을 접착할 시, 기존의 비심미적인 밴드를 사용하지 않더라도 sandblasting과 불산 그리고 포세린 전처리제를 이용한 직접 부착 술식으로 임상적으로 유용하게 사용될 수 있음을 알 수 있었다.

Keywords

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