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치아의 견인을 위한 버튼 접착시 오염이 인장강동에 미치는 영향

Other Titles
 TENSILE STRENGTHS OF PRE-LIGATURED BUTTON WITH SEVERAL TYPES OF CONTAMINATION IN DIRECT BONDING PROCEDURE WHICH CAN HAPPEN DURING THE SURGICAL EXPOSURE OF UNERUPTED TEETH 
Authors
 김성오  ;  최병재  ;  이제호  ;  손흥규 
Citation
 Journal of the Korean Academy of Pediatric Dentistry (대한소아치과학회지), Vol.25(2) : 400-420, 1998 
Journal Title
 Journal of the Korean Academy of Pediatric Dentistry (대한소아치과학회지) 
ISSN
 1226-8496 
Issue Date
1998
Abstract
We already know that it is very difficult to obtain an ‘isolated field’ for direct bonding during the surgical exposur of unerupted teeth. The aim of this in-vitro study is to simulate the clinical situation of forced eruption and to evaluate the tensile strengths of preligatured button with several types of contamination which can happen during the surgical exposure of unerupted teeth. Four orthodontic direct bonding systems were used. (Ortho-OneTM, Rely-a-BondR, Ortho-TwoTM, Phase ⅡR) Each material was divided into four groups(n=20) : Group 1. (Control, no contamination), Group 2. (Rinse etching agent with saline instead of water), Group 3. (Blood contamination of etched surface for 30 seconds), Group 4. (Blood contamination of primed surface for 30 seconds) 320 bovine anterior permanent teeth were divided into the above mentioned 16 groups. Enamel surface was flattened and ground under water coolant. Pre-ligatured buttons were prepared to the same form. (Cut 0.25 ligature wire 10㎝ in length. Twist the ligature wire 30 times clockwise. Mark the wire 15㎜ and 35㎜ points from button. Make a loop sticking two points together and twist the loop 6 times counterclockwise.) The boned specimens were stored at 37℃ saline solution for 3 days. Then the tensile strength of each sample was measured with Instron universal testing machine, crosshead speed of 0.5㎜/min. The following results were obtained : 1. As compared to control groups (Group 1) of each material, Rely-a-Bond had a significantly lower mean tensile strengths than other material. (p<0.01) 2. In Group 2. of Ortho-One and Rely-a-Bond, the mean tensile strengths decreased about 7.7% and 11.1%, respectively with statistical significances. (p<0.05) 3. In Group 2. of Ortho-Two and Phase Ⅱ, the mean tensile strengths did not decrease. 4. In Group 3. of Ortho-One, Rely-a-Bond, Ortho-Two. and Phase Ⅱ, the mean tensile strengths decreased about 60.8%, 56.1%, 60.2%, and 46.0%, respectively with statistical significances. (p<0.01) 5. In Group 4. of Ortho-One and Rely-a-Bond, the mean tensile strengths did not decrease. 6. In Group 4. of Ortho-Two and Phase Ⅱ, the mean tensile strengths were decreased about 20.95% and 22.28%, respectively with statistical significances. (p<0.01) There were formations of a hump shaped mass from bonding resin under blood contamination which disturbed direct bonding procedure. According to Reynolds, the proper bond strength for clinical manipulation should be at least 45N or about 4.5Kg.F. According to these results, it can be concluded that Ortho-One could be used during surgical exposure of unerupted teeth. In any case, blood contamination of the etched surface should be avoided, but the blood contamination of primed surface of Ortho-One may not decrease bond strength. Just ‘blowing-out’ is enough to remove blood from primed surface of Ortho-One. You can verify the clean surface of the primer of Ortho-One after blowing out the blood contamination.
Files in This Item:
T199801849.pdf Download
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Pediatric Dentistry (소아치과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Seong Oh(김성오) ORCID logo https://orcid.org/0000-0002-8620-1377
Son, Heung Kyu(손흥규)
Lee, Jae Ho(이제호) ORCID logo https://orcid.org/0000-0002-1556-3485
Choi, Byung Jai(최병재)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/176615
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