The korean journal of orthodontics (대한치과교정학회지)

The Korean Association Of Orthodontists (대한치과교정학회)
권호 표지
DOI QR코드

DOI QR Code

Modified laser etching technique of enamel for bracket bonding

브라켓 부착을 위한 변형된 레이저 부식법

  • Yun, Min-Sung (Department of Orthodontics, Hallym University Sacred Heart Hospital) ;
  • Lee, Sang-Min (Department of Orthodontics, Hallym University Sacred Heart Hospital) ;
  • Yang, Byung-Ho (Department of Orthodontics, Hallym University Sacred Heart Hospital)
  • 윤민성 (한림대학교성심병원 치과진료센터 치과교정과) ;
  • 이상민 (한림대학교성심병원 치과진료센터 치과교정과) ;
  • 양병호 (한림대학교성심병원 치과진료센터 치과교정과)
  • Received : 2009.11.18
  • Accepted : 2010.02.08
  • Published : 2010.04.30
Download PDF
⟨ Previous Next ⟩

Abstract

Objective: Many studies have carried out research on comparisons between laser etching and conventional etching systems to investigate methods of reinforcing shear bond strength. The purposes of this study were to assess the efficiency of bonding with erbium, chromium doped: yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser etching combined with the conventional etching technique. Methods: Sixty-four sound premolars, extracted for orthodontic purposes, were randomly divided into 4 groups and treated in the following manner. First group, conventional etching of 37% phosphoric acid for 15 seconds (control); second group, 1.5 W laser etching for 10 seconds followed by conventional etching; third group, conventional etching followed by 1.5 W laser etching; fourth group, 1.5 W laser etching for 15 seconds only. We assessed the shear bond strength, the surface characteristics, and the adhesive remnant index scores between all groups. Results: Experimental groups showed higher shear bond strength than the control group. But no statistically significant differences were found between the second and third groups. Adhesive remnant scores were compared with the Kruskal-Wallis test, and no statistically significant differences were found between all groups. Conclusions: To obtain maximum shear bonding strength, a combined technique of Er,Cr:YSGG and 37% phosphoric acid is useful even though it may be inconvenient.

전단결합강도를 강화하기 위해 레이저를 이용한 부식과 산을 이용한 부식의 비교 연구가 많이 진행되어왔다. 본 연구에서는 Er,Cr:YSGG laser와 전통적인 산부식법을 혼합한 방법의 전단결합강도의 변화에 대한 평가를 하고자 한다. 교정적인 목적으로 발치된 64개의 건전한 소구치를 이용하여 16개씩 4개의 군으로 나누었다. 첫 번째 군은 37% 인산을 15초 적용시키는 전통적인 부식 방법을 택하였고, 두 번째 군은 물방울레이저로 1.5 W로 10초간 부식시킨 후 전통적인 산부식 방법을 시행하였다. 세 번째 군은 두 번째 군과 같지만 산부식을 먼저 시행한 후 물방울레이저로 부식시켰다. 네 번째 군은 물방울레이저를 이용하여 1.5 W로 15초간 부식시켰다. 이후 전단결합강도의 측정 및 치아 표면의 특징 관찰, 그리고 접착제잔류지수를 평가하였다. 두 번째, 세 번째 군은 첫 번째, 네 번째 군에 대하여 전단결합강도가 높게 측정되었다. 하지만 두 가지 기법의 복합사용 순서를 달리한 두 번째, 세 번째 군 사이에는 통계적으로 유의한 차이가 나지 않았다. 기존 산부식을 이용한 브라켓 접착법보다 산부식과 Er,Cr:YSGG laser를 복합적으로 사용 시, 향상된 전단결합강도를 얻을 수 있다.

Keywords

References

  1. Stern RH, Sognnaes RF. Laser beam effect on dental hard tissues. J Dent Res 1964;43:873.
  2. Suh CH, Chang NY, Chae JM, Cho JH, Kim SC, Kang KH. Efficiency of ceramic bracket debonding with the Er:YAG laser. Korean J Orthod 2009;39:213-24. https://doi.org/10.4041/kjod.2009.39.4.213
  3. An KM, Sohn DS. The effect of using laser for ceramic bracket bonding of porcelain surfaces. Korean J Orthod 2008;38:275-82. https://doi.org/10.4041/kjod.2008.38.4.275
  4. von Fraunhofer JA, Allen DJ, Orbell GM. Laser etching enamel for direct bonding. Angle Orthod 1993;63:73-6.
  5. Ozer T, Başaran G, Berk N. Laser etching of enamel for orthodontic bonding. Am J Orthod Dentofacial Orthop 2008;134:193-7. https://doi.org/10.1016/j.ajodo.2006.04.055
  6. Usumez S, Orhan M, Usumez A. Laser etching of enamel for direct bonding with an Er,Cr:YSGG hydrokinetic laser system. Am J Orthod Dentofacial Orthop 2002;122:649-56. https://doi.org/10.1067/mod.2002.127294
  7. Ozturk F, Babacan H, Nalcacı R, Kustarc A. Effects of direct and indirect bonding techniques on bond strength and microleakage after thermocycling. Korean J Orthod 2009;39:393-401. https://doi.org/10.4041/kjod.2009.39.6.393
  8. Bishara SE, Trulove TS. Comparisons of different debonding techniques for ceramic brackets: an in-vitro study. Part 1. Background and methods. Am J Orthod Dentofacial Orthop 1990;98:145-53. https://doi.org/10.1016/0889-5406(90)70008-Z
  9. Rizoiu I, Kohanghadosh F, Kimmel AI, Eversole LR. Pulpal thermal responses to an erbium, chromium:YSGG pulsed laser hydrokinetic system. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 1998;86:220-3. https://doi.org/10.1016/S1079-2104(98)90128-7
  10. Ariyaratnam MT, Wilson MA, Mackie IC, Blinkhorn AS. A comparison of surface roughness and composite/enamel bond strength of human enamel following the application of the Nd:YAG laser and etching with phosphoric acid. Dent Mater 1997;13:51-5. https://doi.org/10.1016/S0109-5641(97)80008-5
  11. Reynolds IR. A review of direct orthodontic bonding. Br J Orthod 1975;2:171-8. https://doi.org/10.1080/0301228X.1975.11743666
  12. Wang X, Ishizaki NT, Suzuki N, Kimura Y, Matsumoto K. Morphological changes of bovine mandibular bone irradiated by Er,Cr;YSGG laser: an in vitro study. J Clin Laser Med Surg 2002;20:245-50. https://doi.org/10.1089/10445470260420740
  13. Kimura Y, Yu DG, Fujita A, Yamashita A, Murakami Y, Matsumoto K. Effects of erbium,chromium:YSGG laser irradiation on canine mandibular bone. J Periodontol 2001;72:1178-82. https://doi.org/10.1902/jop.2000.72.9.1178
  14. Johnston CD, Hussey DL, Burden DJ. The effect of etch duration on the microstructure of molar enamel: an in vitro study. Am J Orthod Dentofacial Orthop 1996;109:531-4. https://doi.org/10.1016/S0889-5406(96)70138-5