레이저 처리된 법랑질의 산저항성: 불소처리의 효과 = Acid resistance on the Laser-treated Enamels: Effect of Fluoride Treatment

국문 초록 (Abstract)

본 연구는 Er:YAG 레이저로 처리한 후 추가적인 불소의 처리가 법랑질의 산저항성에 어떤 영향을 미치는지를 평가하는 것으로 이를 위하여 결함이 없고 깨끗한 우치 법랑질을 구입하고 4개의 군으로 나누었다: 레이저를 처리하지 않은 군 (1군), Er:YAG 레이저 처리군 (2군), Er:YAG 레이저 처리 + 불소 처리군 (3군), Er:YAG 레이저 처리 + CO₂ 레이저 처리 + 불소 처리군 (4군). 4개 군을 초산용액을 기본으로 하는 산성용액으로 탈회와 재광화를 4일간 반복 (pH-cycling) 한 후 치아에서의 미네랄 용해와 형상변화를 관찰하였다. 그결과 Er:YAG 레이저 처리 후 치아표면은 거칠고 불규칙한 톱니모양의 형상을 하였다. CO₂ 레이저 처리 후 표면은 녹고 재응결되면서 길고 깊은 균열을 남겼다. pH-cycling 후 뚜렷한 표면형상 변화는 없었으나 2군과 3군에서 micropores들이 관찰되었다. 용출된 미네랄의 양은 군마다 유의하게 달랐는데 특히 4군에서 용출된 Ca와 P의 양이 가장 적었다. 그러나 3군과 비교했을 때 절대적인 양에는 큰 차이가 없었다.

참고문헌 (Reference)

• 1 Burkes EJ, "Wet versus dry enamel ablation by Er:YAG laser" 67 : 847-851, 1992
• 2 Tagomori S, "Ultrastructural change of enamel exposed to a normal pulsed Nd: YAG laser" 29 : 513-520, 1995
• 3 Holcomb DW, "Thermal decomposition of human tooth enamel" 31 : 189-201, 1980
• 4 Lovelock DJ, "The loss of topically applied fluoride from the surface of human enamel in vitro using 18F" 18 : 27-29, 1973
• 5 Fischer RB, "The effect of sodium fluoride upon the surface structure of powdered dental enamel" 31 : 751-755, 1952
• 6 Mellberg JR, "The acquisition and loss of fluoride by topically fluoridated human tooth enamel" 11 : 1213-1220, 1966
• 7 Pogrel MA, "Structural changes in dental enamel induced by high energy continuous wave carbon dioxide laser" 13 : 89-96, 1993
• 8 McCormack SM, "Scanning electron microscope observations of CO2 laser effects ondental enamel" 74 : 1702-1708, 1995
• 9 Sato K, "Relation between acid dissolution and histological alteration of heated tooth enamel" 17 : 490-495, 1983
• 10 Ferreira JM, "Rachinger WA, Orams HJ (1989). Effects of continuous-wave CO2 laser on the ultrastructure of human dental enamel" 34 : 551-562, 1989
• 11 Featherstone JD, "Prevention and reversal of dental caries: Role of low level fluoride" 27 : 31-40, 1999
• 12 Zuerlein M, "Optical properties of dental enamel at 9-11 ㎛ derived from time-resolved radiometry" 5 : 1083-1089, 1999
• 13 Hale GM, "Optical constants of water in the 200 nm to 200 ㎛ wavelength region" 12 : 555-563, 1973
• 14 Nelson DG, "Morphology, histology and crystallography of human dental enamel treated with pulsed low-energy infrared laser radiation" 21 : 411-414, 1987
• 15 ten Cate JM, "Mechanistic aspects of the interactions between fluoride and dental enamel" 2 : 283-296, 1991
• 16 Hibst R, "Mechanical effects of Er:YAG laser on bone ablation" 12 : 125-130, 1992
• 17 Odutuga AA, "Lipid analysis of human enamel and dentine" 19 : 729-731, 1974
• 18 Gao XL, "Laser-fluoride effect on root demineralization" 85 : 919-923, 2006
• 19 Robertson CW, "Lambert absorption coefficients of water in the infrared" 61 : 1316-1320, 1971
• 20 Rodrigues LK, "In situ mineral loss inhibition by CO2 laser and fluoride" 85 : 617-621, 2006
• 21 Apel C, "Gutknecht N (2002). Calcium solubility of dental enamel following sub-ablative Er:YAG and Er:YSGG laser irradiation in vitro" 30 : 337-341, 2002
• 22 Keller U, "Experimental studies of the application of the Er:YAG laser on dental hard substances: II. Light microscopic and SEM investigations" 9 : 345-351, 1989
• 23 Visuri SR, "Erbium laser ablation of dental hard tissue: Effect of water cooling" 18 : 294-300, 1996
• 24 Li ZZ, "Er:YAG laser ablation of enamel and dentin of human teeth: Determination of ablation rates at various fluences and pulse repetition rates" 12 : 625-630, 1992
• 25 Meurman JH, "Effects of carbon dioxide, Nd:YAG and carbon dioxide-Nd:YAG combination lasers at high energy densities on synthetic hydroxyapatite" 26 : 77-83, 1992
• 26 Brown WE, "Chemical properties of bone mineral" 6 : 213-226, 1976
• 27 Forrer M, "Boneablation mechanism using CO2 lasers of different pulse duration and wavelength" 56 : 104-112, 1993
• 28 LeGeros RZ, "Biodegradation and bioresorption of calcium phosphates" 14 : 65-88, 1993
• 29 Wei SH, "-ray diffraction and analysis of the reactions between intact and powdered enamel and several fluoride solutions" 47 : 471-477, 1968