DOI QR코드

DOI QR Code

Effect of infection control barrier thickness on light curing units

감염 조절용 차단막의 두께가 광중합기의 중합광에 미치는 영향

  • Chang, Hoon-Sang (Department of Conservative Dentistry, Wonkwang University College of Dentistry and Dental Research Institute) ;
  • Lee, Seok-Ryun (Department of Conservative Dentistry, Wonkwang University College of Dentistry and Dental Research Institute) ;
  • Hong, Sung-Ok (Department of Conservative Dentistry, Wonkwang University College of Dentistry and Dental Research Institute) ;
  • Ryu, Hyun-Wook (Department of Conservative Dentistry, Wonkwang University College of Dentistry and Dental Research Institute) ;
  • Song, Chang-Kyu (Department of Conservative Dentistry, Wonkwang University College of Dentistry and Dental Research Institute) ;
  • Min, Kyung-San (Department of Conservative Dentistry, Wonkwang University College of Dentistry and Dental Research Institute)
  • 장훈상 (원광대학교 치과대학 치과보존학교실 및 치의학연구소) ;
  • 이석련 (원광대학교 치과대학 치과보존학교실 및 치의학연구소) ;
  • 홍성옥 (원광대학교 치과대학 치과보존학교실 및 치의학연구소) ;
  • 류현욱 (원광대학교 치과대학 치과보존학교실 및 치의학연구소) ;
  • 송창규 (원광대학교 치과대학 치과보존학교실 및 치의학연구소) ;
  • 민경산 (원광대학교 치과대학 치과보존학교실 및 치의학연구소)
  • Received : 2010.07.29
  • Accepted : 2010.08.26
  • Published : 2010.09.30

Abstract

Objectives: This study investigated the effect of infection control barrier thickness on power density, wavelength, and light diffusion of light curing units. Materials and Methods: Infection control barrier (Cleanwrap) in one-fold, two-fold, four-fold, and eightfold, and a halogen light curing unit (Optilux 360) and a light emitting diode (LED) light curing unit (Elipar FreeLight 2) were used in this study. Power density of light curing units with infection control barriers covering the fiberoptic bundle was measured with a hand held dental radiometer (Cure Rite). Wavelength of light curing units fixed on a custom made optical breadboard was measured with a portable spectroradiometer (CS-1000). Light diffusion of light curing units was photographed with DSLR (Nikon D70s) as above. Results: Power density decreased significantly as the layer thickness of the infection control barrier increased, except the one-fold and two-fold in halogen light curing unit. Especially, when the barrier was four-fold and more in the halogen light curing unit, the decrease of power density was more prominent. The wavelength of light curing units was not affected by the barriers and almost no change was detected in the peak wavelength. Light diffusion of LED light curing unit was not affected by barriers, however, halogen light curing unit showed decrease in light diffusion angle when the barrier was four-fold and statistically different decrease when the barrier was eight-fold (p < 0.05). Conclusions: It could be assumed that the infection control barriers should be used as two-fold rather than one-fold to prevent tearing of the barriers and subsequent cross contamination between the patients.

연구목적: 본 연구는 감염 조절용 차단막을 여러 겹으로 사용했을 때 광중합기의 광강도와 파장, light diffusion 등에 미치는 영향에 대해 조사하였다. 연구 재료 및 방법: 감염 조절용 차단막은 투명 랩 (크린랩)을 사용하였고 광중합기는 할로겐 광중합기 (Optilux 360)와 LED 광중합기 (Elipar FreeLight 2)를 사용하였다. 차단막을 1겹, 2겹, 4겹, 8겹으로 광중합기의 광섬유말단을 감싸고 휴대용 광강도 측정기 (Cure Rite)로 광중합기의 광강도를 측정하였다. 광중합기를 주문제작한 optical breadboard에 고정시킨 후 휴대용 spectroradiometer (CS-1000)를 이용하여 광중합기의 파장을 측정하였고, DSLR (Nikon D70s)을 이용하여 광중합기의 light diffusion을 사진 촬영하였다. 결과: 광강도 측정 결과는 차단막의 두께가 증가할수록 광강도가 유의하게 감소하였으나 할로겐 광중합기에서 1겹과 2겹 사이에는 유의차가 없었으며, 4겹 이상의 차단막을 투과할 때 광강도가 더 많이 감소하였다. 여러 겹의 차단막을 투과한 광중합기의 전체적인 파장 형태와 peak wavelength의 변화는 관찰되지 않았다. Light diffusion 사진 촬영 시, LED 광중합기에서는 차단막의 두께가 미치는 영향이 없었으나 할로겐 광중합기에서는 차단막을 4겹 사용했을 때부터 중합광이 조사되는 각도가 감소하기 시작하여 8겹 사용했을 때 통계적으로 유의하게 감소하는 것을 볼 수 있었다 (p < 0.05). 결론: 광중합형 복합레진을 광중합할 경우 감염 조절용 차단막이 찢어지는 경우를 대비하여 1겹으로 사용하기 보다는 2겹으로 사용하는 것이 환자간의 교차감염을 예방하는데 유리할 것으로 사료된다.

Keywords

References

  1. Caughman GB, Caughman WF, Napier N, Schuster GS. Disinfection of visible-light-curing devices. Oper Dent 1989;14(1):2-7.
  2. Kakaboura A, Tzoutzas J, Pitsinigos D, Vougiouklakis G. The effect of sterilization methods on the light transmission characteristics and structure of light-curing tips. J Oral Rehabil 2004;31:918-923. https://doi.org/10.1111/j.1365-2842.2004.01314.x
  3. Rueggeberg FA, Caughman WF, Comer RW. The effect of autoclaving on energy transmission through lightcuring tips. J Am Dent Assoc 1996;127:1183-1187. https://doi.org/10.14219/jada.archive.1996.0409
  4. Nelson SK, Caughman WF, Rueggeberg FA, Lockwood PE. Effect of glutaraldehyde cold sterilants on light transmission of curing tips. Quintessence Int 1997;28: 725-730.
  5. Chong SL, Lam YK, Lee FKF, Ramalingam L, Yeo ACP, Lim CC. Effect of various infection-control methods for light-cure units on the cure of composite resins. Oper Dent 1998;23:150-154.
  6. Pollington S, Kahakachchi N, van Noort R. The Influence of Plastic Light Cure Sheaths on the Hardness of Resin Composite. Oper Dent 2009;34: 741-745. https://doi.org/10.2341/09-024-L
  7. Scott BA, Felix CA, Price RB. Effect of disposable infection control barriers on light output from dental curing lights. J Can Dent Assoc 2004;70:105-110.
  8. Fan PL, Schumacher RM, Azzolin K, Geary R, Eichmiller FC. Curing-light intensity and depth of cure of resin-based composites tested according to international standards. J Am Dent Assoc 2002;133:429-434. https://doi.org/10.14219/jada.archive.2002.0200
  9. Park SM, Shin DH. Microhardness and microleakage of composite resin according to the change of curing light intensity. J Kor Acad Cons Dent 2001;26:363-371.
  10. Park JG, Cho BH, Lee IB, Kwon HC, Um CM. The effects of various light intensity on the polymerization of resin composites. J Kor Acad Cons Dent 2001;26: 86-94.
  11. Shortall AC, Harrington E, Wilson HJ. Light curing unit effectiveness assessed by dental radiometers. J Dent 1995;23:227-232. https://doi.org/10.1016/0300-5712(95)91187-R
  12. Rueggeberg FA. Precision of hand-held dental radiometers. Quintessence Int 1993;24:391-396.
  13. Peutzfeldt A. Correlation between recordings obtained with a light-intensity tester and degree of conversion of a light-curing resin. Scand J Dent Res 1994;102:73-75.
  14. Kim SY, Lee IB, Cho BH, Son HH, Kim MJ, Seok CI, et al. Dentin bond strength of bonding agents cured with Light Emitting Diode. J Kor Acad Cons Dent 2004;29:504-514. https://doi.org/10.5395/JKACD.2004.29.6.504
  15. Price RB, Derand T, Sedarous M, Andreou P, Loney RW. Effect of distance on the power density from two light guides. J Esthet Dent 2000;12:320-327. https://doi.org/10.1111/j.1708-8240.2000.tb00241.x
  16. Corciolani G, Vichi A, Davidson CL, Ferrari M. The influence of tip geometry and distance on light-curing efficacy. Oper Dent 2008;33:325-331.

Cited by

  1. Effect of a multi-layer infection control barrier on the micro-hardness of a composite resin vol.20, pp.5, 2012, https://doi.org/10.1590/S1678-77572012000500014
  2. Power density of various light curing units through resin inlays with modified layer thickness vol.37, pp.3, 2012, https://doi.org/10.5395/rde.2012.37.3.130