Effect of high-powered LED and dentin thickness on intrapulpal temperature rise in primary teeth

Obada Bassam Jabbour

Abstract


Temperature rise in the pulp chamber is a severe stress that can cause irreversible damage to the pulp. The objective of this study was to compare the temperature rise under primary teeth dentin induced by Light Emitting Diode (LED1) with different light curing modes. Thirty dentin discs of 0.5- and 2-mm thickness were prepared from human primary molars. Resin composite placed in an acrylic cavity was cured using a high-powered LED (Foshan JERRY Medical Apparatus CO., LTD, Foshan, China) for 20s. The different modes tested in this study were standard mode, ramp mode, and pulse mode (n=5). Temperature was recorded using a k-type thermocouple in direct contact with the dentin disc. Temperature change data were subjected to analysis of variance (ANOVA) and Tukey's test. The highest temperature rise was observed under 0.5 mm thick dentin disc with standard mode (4.7 ± 0.42), whereas the lowest values were recorded with pulse mode under 2 mm thick dentin (2.5 ± 0.23). Pulse mode produced significant lower temperature rise compared to standard mode in both dentin thicknesses (P < 0.05). Ramp mode gave significantly lower values compared to standard mode in 0.5 mm group (P < 0.05). For standard and ramp modes, temperature rise decreased with the increase of the dentin thickness (P < 0.05). Maximum temperature rise induced by high-powered LED was not critical for pulpal health. Temperature rise related to dentin thickness and curing modes. Pulse mode gave the lowest values.

Keywords


Dentistry; Pediatrics

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References


Kodonas K, Gogos C, Tziafa C. Effect of simulated pulpal microcirculation on intrachamber temperature changes following application of various curing units on tooth surface. J Dent 37:485-490, 2009.

Jo S-A, Lee C-H, Kim M-J, Ferracane J, Lee I-B. Effect of pulse-width-modulated LED light on the temperature change of composite in tooth cavities. Dental Materials 35:554-563, 2019.

Guiraldo RD, Consani S, Mastrofrancisco S, Consani RL, Sinhoreti MA, Correr-Sobrinho L. Influence of light curing unit and ceramic thickness on temperature rise during resin cement photo-activation. Bull Tokyo Dent Coll 49:173-178, 2008.

Gross DJ, Dávila-Sánchez A, Runnacles P, et al. In vivo temperature rise and acute inflammatory response in anesthetized human pulp tissue of premolars having Class V preparations after exposure to Polywave® LED light curing units. Dent Mater 36:1201-1213, 2020.

Runnacles P, Arrais CA, Pochapski MT, et al. In vivo temperature rise in anesthetized human pulp during exposure to a polywave LED light curing unit. Dent Mater 31:505-513, 2015.

Zach L, Cohen G. Pulp response to externally applied heat. Oral Surg Oral Med Oral Pathol 19:515-530, 1965.

Rajesh Ebenezar AV, Anilkumar R, Indira R, Ramachandran S, Srinivasan MR. Comparison of temperature rise in the pulp chamber with different light curing units: An in-vitro study. J Conserv Dent 13:132-135, 2010.

Atai M, Motevasselian F. Temperature rise and degree of photopolymerization conversion of nanocomposites and conventional dental composites. Clin Oral Investig 13:309-316, 2009.

Murchison DF, Moore BK. Influence of curing time and distance on microhardness of eight light-cured liners. Oper Dent 17:135-141, 1992.

Chung KH, Greener EH. Correlation between degree of conversion, filler concentration and mechanical properties of posterior composite resins. J Oral Rehabil 17:487-494, 1990.

Knezević A, Tarle Z, Meniga A, Sutalo J, Pichler G, Ristić M. Degree of conversion and temperature rise during polymerization of composite resin samples with blue diodes. J Oral Rehabil 28:586-591, 2001.

Schneider LF, Consani S, Correr-Sobrinho L, Correr AB, Sinhoreti MA. Halogen and LED light curing of composite: temperature increase and Knoop hardness. Clin Oral Investig 10:66-71, 2006.

Hannig M, Bott B. In-vitro pulp chamber tempera-

ture rise during composite resin polymerization with various light-curing sources. Dent Mater 15:275-281, 1999.

Bouillaguet S, Caillot G, Forchelet J, Cattani-

Lorente M, Wataha JC, Krejci I. Thermal risks from LED- and high-intensity QTH-curing units during polymerization of dental resins. J Biomed Mater Res B Appl Biomater 72:260-267, 2005.

Hubbezoglu I, Dogan A, Dogan OM, Bolayir G, Bek B. Effects of light curing modes and resin composites on temperature rise under human dentin: an in vitro study. Dent Mater J 27:581-589, 2008.

Yap AU, Soh MS. Thermal emission by different light-curing units. Oper Dent 28:260-266, 2003.

Baroudi K, Silikas N, Watts DC. In vitro pulp chamber temperature rise from irradiation and exotherm of flowable composites. Int J Paediatr Dent 19:48-54, 2009.

Hamze F, Ganjalikhan Nasab SA, Eskandarizadeh A, Shahravan A, Akhavan Fard F, Sinaee N. Thermal scanning of dental pulp chamber by thermocouple system and infrared camera during photo curing of resin composites. Iran Endod J 13:195-199, 2018.

da Silva EM, Penelas AG, Simão MS, Filho JD, Poskus LT, Guimarães JG. Influence of the degree of dentine mineralization on pulp chamber temperature increase during resin-based composite (RBC) light-activation. J Dent 38:336-342, 2010.

Gindri LD, Fröhlich TT, Rosso CR, Rocha RO. Etching time and bonding of adhesive systems to dentin of primary teeth: A systematic review and meta-analysis. Int J Paediatr Dent 31:122-130, 2021.

Agematsu H, Abe S, Shiozaki K, et al. Relationship between large tubules and dentin caries in human deciduous tooth. Bull Tokyo Dent Coll 46:7-15, 2005.

Gul P, Celik N, Ozgeris FB, Demirkaya-Miloglu F, Kiziltunc A, Seven N. Effects of bisphenol a released from composite fillings on reproductive hormone levels in men. Int Dent J 71:343-351, 2021.

Buyukkok C, Kaptan A. Temperature increases in primary teeth pulp chamber during polymerization of glass ionomer-based restorative materials. Eur Oral Res 55:28-33, 2021.

Uhl A, Völpel A, Sigusch BW. Influence of heat from light curing units and dental composite polymerization on cells in vitro. J Dent 34:298-306, 2006.

Uhl A, Mills RW, Jandt KD. Polymerization and light-induced heat of dental composites cured with LED and halogen technology. Biomaterials 24:1809-1820, 2003.

Shortall AC, Harrington E. Temperature rise during polymerization of light-activated resin composites. J Oral Rehabil 25:908-913, 1998.

3M ESPE Dental Products. Instructions for use. Filtek Z250, 2014 Available from: https://multimedia.3m.com/mws/media/219552O/3m-filtek-z250-universal-restorative-instructions.pdf [Accessed 13 April 2022].

Hosaka K, Kubo S, Tichy A, et al. Clinical effectiveness of direct resin composite restorations bonded using one-step or two-step self-etch adhesive systems: A three-year multicenter study. Dent Mater J 40:1151-1159, 2021.

Dogan A, Hubbezoglu I, Dogan OM, Bolayir G, Demir H. Temperature rise induced by various light curing units through human dentin. Dent Mater J 28:253-260, 2009.

Koutsi V, Noonan RG, Horner JA, Simpson MD, Matthews WG, Pashley DH. The effect of dentin depth on the permeability and ultrastructure of primary molars. Pediatr Dent 1994;16:29-35, 1994.

Mjör IA. Dentin-predentin complex and its permeability: pathology and treatment overview. J Dent Res 64:621-627, 1985.

Ohmoto K, Taira M, Shintani H, Yamaki M. Studies on dental high-speed cutting with carbide burs used on bovine dentin. J Prosthet Dent 71:319-323,1994.

Jandt KD, Mills RW. A brief history of LED photopolymerization. Dent Mater 29:605-617, 2013.

Al-Qudah AA, Mitchell CA, Biagioni PA, Hussey DL. Effect of composite shade, increment thickness and curing light on temperature rise during photocuring. J Dent 35:238-245, 2007.

Unsal KA, Karaman E. Effect of additional light curing on colour stability of composite resins. Int Dent J 72:346-352, 2021.

Loney RW, Price RB. Temperature transmission of high-output light-curing units through dentin. Oper Dent 26:516-520, 2001

Aguiar FH, Barros GK, Lima DA, Ambrosano GM, Lovadino JR. Effect of composite resin polymerization modes on temperature rise in human dentin of different thicknesses: an in vitro study. Biomed Mater 1:140-143, 2006.

Chang HS, Cho KJ, Park SJ, et al. Thermal analysis of bulk filled composite resin polymerization using various light curing modes according to the curing depth and approximation to the cavity wall. J Appl Oral Sci 21:293-299, 2013.

Guiraldo RD, Consani S, Consani RL, et al. Comparison of silorane and methacrylate-based composites on the polymerization heat generated with different light-curing units and dentin thicknesses. Braz Dent J 24:258-262, 2013.

Runnacles P, Arrais CAG, Maucoski C, Coelho U, De Goes MF, Rueggeberg FA. Comparison of in vivo and in vitro models to evaluate pulp temperature rise during exposure to a Polywave® LED light curing unit. J Appl Oral Sci 27:e20180480, 2019.


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