Journal of the korean academy of Pediatric Dentistry (대한소아치과학회지)

Korean Academy of Pediatric Dentistry (대한소아치과학회)
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Effect of Different Types of Bonding Agent and Application Methods on Shear Bond Strength of Orthodontic Bracket

Bonding agent의 종류 및 적용 방법에 따른 교정용 브라켓의 전단결합강도에 관한 연구

  • Lee, Jaehee (Department of Pediatric Dentistry, School of Dentistry, Dankook University) ;
  • Kim, Jongsoo (Department of Pediatric Dentistry, School of Dentistry, Dankook University)
  • 이재희 (단국대학교 치과대학 소아치과학교실) ;
  • 김종수 (단국대학교 치과대학 소아치과학교실)
  • Received : 2017.04.26
  • Accepted : 2017.06.26
  • Published : 2017.11.30
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Abstract

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.

맹출 장애 치료를 위해 교정력을 이용한 매복치의 맹출 유도를 시행하며, 이 과정 중 여러 원인에 의해 부착 실패가 일어날 수 있다. 이 연구의 목적은 산부식 레진 접착 시스템과 자가 산부식 접착 시스템을 이용하여 전단 결합 강도를 평가해보고, 접착 과정 중, 프라이머 도포 후 광중합 단계를 생략하여 시간 절약이 전단 결합 강도에 미치는 영향을 평가해보고자 하였다. 발거된 사람의 상악 전치부 40개 치아를 대상으로 I군과 II군은 산부식 후 프라이머로 Transbond$^{TM}$ XT Light cure Adhesive primer를 적용 하였으며 III군과 IV군은 Transbond$^{TM}$ Plus Self Etching primer을 적용 하였다. I군과 III군은 제조사의 지시 사항대로, II군과 IV군은 접착제 도포 후 광중합 단계를 줄여 부착을 시행하였다. 그 후 전단결합강도와 접착제 잔류 지수(Adhesive Remnant Index, ARI)를 이용하여 기록하였다. 전단결합강도는 I군, II군, III군 그리고 IV군 순으로 컸으며 대조군인 I군과 실험군 간에만 유의차가 있었다(p < 0.05). ARI 지수는 I군, III군, IV군 그리고 II군 순으로 대조군에서 치면과 레진 사이의 결합력이 컸다. 대조군이 유의하게 전단결합강도가 높았으나 다른 군에서도 임상적으로 유용한 전단결합강도를 가진다.

Keywords

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