| THE EFFECT OF ETCHING TIME ON THE PATTERN OF ACID ETCHING ON THE ENAMEL OF PRIMARY TEETH |
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Su-Mi Choi1, Young-Chul Choi2, Jae-Hong Park2, Sung-Chul Choi2 |
1Department of Pediatric Dentistry, School of Dentistry, Kyung Hee University
2Institute of Oral Biology, School of Dentistry, Kyung Hee University |
| 산부식 시간에 따른 유전치 법랑질의 부식 유형에 관한 연구 |
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최수미1, 최영철2, 박재홍2, 최성철2 |
1경희대학교 치과대학 소아치과학교실
2경희대학교 치과대학 구강생물학연구소 |
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Received: 11 December 2007 • Accepted: 6 May 2008 |
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| Abstract |
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The presence of a "prismless" layer on the enamel surface particularly on deciduous teeth has been reported by a number of workers. This structure, which appears to lack the normal prism delineations, could interfere with tag formation and hence, reduce bonding to such surfaces. The purpose of this study was to investigate the relationship of etching times on the effect of acid etching on primary enamel with respect to the quality of etching patterns. Labial surfaces of 32 extracted or exfoliated caries-free primary anterior teeth were used. 35% phosphoric acid gel was used only cervical regions of labial surfaces for each etching time group, 15, 30, 45 and 60 seconds. The surfaces were then washed with water for 20 seconds and dried with air spray for 20 seconds. 1. The Type 3 is 75% when the 15 seconds acid etching time was used. 2. The Type 1 is 38% and Type 2 is 75% when the 30 and 45 seconds acid etching time was used. 3. The Type 1 is 25% and Type 2 is 75% when the 60 seconds acid etching time was used. 4. An etching time of 60 seconds produced a constant and regular etching pattern. 5. There is a significant difference between the groups with respect to the patterns of etch achieved(p<0.05). 6. We confirmed that the acid induced patterns(type 1, 2) became more pronounced when the application time increased(p<0.05). 45~60 seconds was the optimal time for etching on the primary enamel. |
| Key Words:
Prismless enamel, Etching time, Etching pattern, SEM |
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