[Home ] [Archive]    
:: Main :: About :: Current Issue :: Archive :: Search :: Submit ::
Main Menu
Journal Information::
About the Journal
Aim & Scope
Editorial Board
Indexing & Abstracting
Advertising Policy
Editorial Policies::
Peer Review Process
Section Policies
Open Access Policy
Ethical Requirements
Publication Ethics
Plagiarism Policy
Article Processing Charges (APC)
Authorship Conflicts
Intellectual Properties
Articles archive::
All Issues
Current Issue
For Authors::
Online Submmision
Instruction to Authors
Peer review process
Publication Ethics
Contact us::
Contact Information
Contact us
Site Facilities::
Site map
Search contents
Top 10 contents
Inform to friends
::
Search in website

Advanced Search
Receive site information
Enter your Email in the following box to receive the site news and information.
Last site contents
:: Contact Us
:: Volume 24, Issue 4 (10-2012) ::
J Iran Dent Assoc 2012, 24(4): 171-176 Back to browse issues page
Comparison of Temperature Changes Through Dentin Discs with Different Thicknesses and Different Distances of Light Curing Tip by Two Different Light Curing Units
Mehrdad Barkatayn1 , Mohammad reza Malekipoor1 , Samaneh Alaei * 2, Maryam Kavoosi3
1- Assistant Professor, Department of Operative Dentistry, School of Dentistry, Azad University. Khorasgan Branch, Iran
2- Postgraduate Student, Department of Operative Dentistry, School of Dentistry, Azad University. Khorasgan Branch, Iran , samaneh_alaei@yahoo.com
3- Dentist
Abstract:   (8822 Views)
    Background and Aim : Excessive heat produced while curing of light-activated dental restorations may cause irreversible damage to dental pulp. The Aims of this study wereto measure the temperature rise(TR) induced by two different light curing units and to evaluate the relathionship between the measured TR in dentin discs of different thicknesses and different distances of light guide tips from dentin disc .

  Materials and Methods : In this experimental study, Quartz-Tungsten-Halogen (QTH) (400 ) and Light-Emitting Diode (LED) systems (1500 ) were used as the curing units. Dentin discs of 0.5, 1.0 and 1.5 mm thicknesses were prepared. Distances of 1,2 and 3 mm from the tip of the light guide and dentin discs were set. Temperatures were recorded using a digital laser thermometer. Data were statistically analyzed using two-way ANOVA, Duncan and T-test .

  Results: Results showed that both dentin thickness and distance between tip of curing units and dentin disks had significant effects on temperature rise in both curing units (P<0.001 ).

  Conclusion : LED produced the highest and the QTH the lowest TR for all tested conditions. Reduced thermal insults were related to increased dentin thickness, increased distance between the light guide tip and dentin, and decreased energy emitted from the light-curing unit .

 
Keywords: Temperature, Curing lights, Dentin
Full-Text [PDF 204 kb]   (2304 Downloads)    
Type of Study: Original | Subject: Restorative Dentistry
References
1. Pashley DH. Dynamics of the pulpo-dentin complex. Critical reviews in oral biology and medicine: An official publication of the Ame Asso Oral Biolog. 1996 Jan;7(2):104-33.
2. Summitt J, Robbins J. Fundamentals of opera-tive dentistry: A contemporary approach. 3rd. Chicago: Quintessence Publishing; 2006.
3. Zach L, Cohen G. Thermogenesis in operative techniques: Comparison of four methods. J Prosthet Dent. 1962 Nov;12(5):977-84.
4. Zach L, Cohen G. Pulp response to externally applied heat. Oral Surg Oral Med Oral Pathol. 1965 Apr; 19(4):515-30.
5. Goodis HE, White JM, Jr. GWM, Yee K, Fuller N, Gee L, et al. Effects of Nd: And Ho: yttrium-aluminium-garnet lasers on human dentine fluid flow and dental pulp-chamber temperature in vitro. Arch Oral Biol. 1997Dec; 42(12):845-54.
6. Karaarslan ES, Secilmis A, Bulbul M, Yildirim C, Usumez A. Temperature increase beneath etched dentin discs during composite polymeri-zation. Photomed Laser Surg. 2011 Jan; 29(1):47-52.
7. Hannig M, Bott B. In-vitro pulp chamber temperature rise during composite resin polymerization with various light-curing sources. Dent Mater. 1999 Jul;15(4):275–81.
8. Jakubinek MB, O’Neill C, Felix C, Price RB, White MA. Temperature excursions at the pulp-dentin junction during the curing of light-activated dental restorations. Dent Mater. 2008 Nov; 24 (11):1468-76.
9. Shortall AC, Harrington E. Temperature rise during polymerization of light-activated resin composites. J Oral Rehabil. 1998 Dec;25(12):908-13.
10. Hargreaves KM, Goodis HE. Seltzer and Bend-er’s dental pulp. 3rd ed. Chicago: Quintessence Pub. Co. 2002.
11. Santini A, Watterson C, Miletic V. Temperature rise within the pulp chamber during composite resin polymerisation using three different light sources. Open Dent J. 2008 Jan;5(2):137-41.
12. Craig RG, Ward ML. Restorative Dent Mater. España: Elsevier; 2006.
13. Bagis B, Bagis Y, Ertas E, Ustaomer S. Compar-ison of the heat generation of light curing units. J Contem Dent Pract. 2008 Jan;9(2):65-72.
14. Dogan A, Hubbezoglu I, Dogan OM, Bolayir G, Demir H. Temperature rise induced by various light curing units through human dentin. Dent Mater J. 2009 May;28(3):253-60.
15. Guiraldo RD, Consani S, Lympius T, Schneider LFJ, Sinhoreti MAC, Correr-Sobrinho L. Influ-ence of the light curing unit and thickness of residual dentin on generation of heat during composite photoactivation. J Oral Sci. 2008 Jun; 50 (2):137-42.
16. Millen C, Ormond M, Richardson G, Santini A, Miletic V, Kew P. A study of temperature rise in the pulp chamber during composite polymeriza-tion with different light-curing units. J Contemp Dent Pract. 2007 Nov1; 8(7):29-37.
17. Durey K, Santini A, Miletic V. Pulp chamber temperature rise during curing of resin-based composites with different light-curing units. Prim Dent Care. 2008 Jan;15(1):33-8.
18. Yazici AR, Müftü A, Kugel G, Perry RD. Com-parison of temperature changes in the pulp chamber induced by various light curing units, in vitro. Oper Dent. 2006 Mar;31(2):261-5.
19. Aguiar FHB, Barros GKP, Lima DANL, Ambro-sano GMB, Lovadino JR. Effect of composite resin polymerization modes on temperature rise in human dentin of different thicknesses: an in vitro study. Biomed Mater. 2006 Sep;1(3):140-3.
20. Roberson TM, Heymann H, Swift EJ. Sturde-vant’s art and science of operative dentistry. 5 th. St. Louis:Mosby; 2006.
21. Yap AUJ, Soh MS. Thermal emission by differ-ent light-curing units. Operative Dent. 2003 May;28(3):260-6.
22. Knezević A, Tarle Z, Meniga A, Sutalo J, Pich-ler G. Influence of light intensity from different curing units upon composite temperature rise. J Oral Rehabil. 2005 May;32(5):362-7.
Send email to the article author

Add your comments about this article
Your username or Email:

CAPTCHA

XML     Print

Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:
Barkatayn M, Malekipoor M R, Alaei S, Kavoosi M. Comparison of Temperature Changes Through Dentin Discs with Different Thicknesses and Different Distances of Light Curing Tip by Two Different Light Curing Units. J Iran Dent Assoc 2012; 24 (4) :171-176
URL: http://jida.ir/article-1-1279-en.html
Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Volume 24, Issue 4 (10-2012) Back to browse issues page
Journal of Iranian Dental Association

AWT IMAGE

This work is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License which allows users to read, copy, distribute and make derivative works for non-commercial purposes from the material, as long as the author of the original work is cited properly
Persian site map - English site map - Created in 0.05 seconds with 37 queries by YEKTAWEB 4645