Evaluation of intrapulpal temperature changes caused by bulk-fill composite resins cured with different light-source modes: ex vivo

Year 2017, , 55 - 60, 15.03.2017

Çiğdem Atalayın , Elif Yaşa Gamze Karaçolak , Tuğrul Sarı Lezize Şebnem Türkün

https://doi.org/10.17214/gaziaot.277974

Cited By: 1

Abstract

Objective: The aim was to evaluate the effects on intrapulpal temperature change of two different LED light-source modes used during the polymerization of bulk-fill composite resins placed in deep cavities.

Materials and Method: Human extracted mandibular molar teeth (n=5) were used to create single-tooth model with an occlusal dentin-thickness of 0.5 mm. Filtek Bulk Fill Posterior (3M ESPE) and SDR (Dentsply) were applied according to manufacturers’ instructions. A conventional composite resin, Filtek Z250 (3M ESPE) was used as control. The soft and turbo modes of LED (Bluephase 20i, Ivoclar Vivadent) were used for polymerization. Intrapulpal temperature changes were determined by using a device simulating pulpal blood microcirculation. For each material, initial and maximum temperature was determined during the curing. Difference between the initial and the highest temperature value was considered as the maximum temperature change (Δt). The data were analyzed with two-way variance analysis and post-hoc Tukey test (p<0.05).

Results: The turbo mode was found to cause significantly greater temperature rise than the soft mode (p<0.001; Tukey test). When the filling material was taken as the variable, the greatest temperature change was observed in the SDR, whereas the least temperature change was observed in the control (p<0.05; Tukey test).

Conclusion: The polymerization of bulk-fill composite resins in the turbo mode of the LED light-source led to greater pulpal temperature rise. The materials’ content and structure also affected the temperature increase. Using the soft mode of a LED light-source for the polymerization of bulk-fill composite resins in deep cavities is preferable to keep the intrapulpal temperature rise minimum.

Keywords

Composite resins, dental pulp, LED dental curing lights, temperature

Farklı modlarda kullanılan ışık kaynağı ile sertleştirilen bulk-fill kompozit rezinlerin pulpa odasında oluşturduğu sıcaklık değişimlerinin değerlendirilmesi: ex vivo

Abstract

Amaç: Derin kavitelerde bulk-fill kompozit rezinlerin polimerizasyonunda kullanılan bir LED ışık kaynağının iki farklı polimerizasyon modunun, pulpa odasında meydana gelen sıcaklık değişimine etkisini incelemektir.

Gereç ve Yöntem: Çalışmada çekilmiş insan alt molar dişleri (n=5) kullanıldı. Okluzal yüzeyler standart 0.5 mm dentin kalınlığı kalacak şekilde aşındırıldı ve tekli-diş modeli oluşturuldu. Deney grubunda Filtek Bulk Fill Posterior (3M ESPE) ve SDR (Dentsply) kullanıldı. Kontrol grubunda ise geleneksel bir kompozit rezin olan Filtek Z250 (3M ESPE) kullanıldı. Materyaller diş yüzeyine üretici firma önerileri doğrultusunda uygulandı. Materyaller LED ışık kaynağının (Bluephase 20i, Ivoclar Vivadent) soft ve turbo modları ile polimerize edildi. Materyallerin sertleşme sırasında oluşturdukları pulpa içi sıcaklık değişimi pulpal kan dolaşımını taklit eden bir cihaz ile incelendi. Her materyal için başlangıçta ve sertleşme süresince gözlenen en yüksek sıcaklık değerleri belirlendi. Başlangıç ve en yüksek sıcaklık değerleri arası fark, maksimum sıcaklık değişimi (Δt) olarak kaydedildi. Verilerin istatistiksel analizi iki yönlü varyans analizi ve post-hocTukey testi ile gerçekleştirildi (p<0.05).

Bulgular: İkili karşılaştırmalarda; turbo modun soft moda göre daha fazla sıcaklık artışına neden olduğu saptandı (p<0.001; Tukey testi). Materyal çeşidi değişken olarak alındığında, en yüksek sıcaklık değişimi SDR’de, en düşük sıcaklık değişimi ise kontrol grubunda görüldü (p<0.05; Tukey testi).

Sonuç: Bulk-fill kompozit rezinlerin polimerizasyonunda bir LED ışık kaynağının turbo modu daha fazla pulpal sıcaklık artışına neden olmaktadır. Materyallerin içerik ve yapıları sıcaklık artışını etkilemektedir. Derin kavitelerin restorasyonları sırasında pulpal dokularda sıcaklık artışını en az seviyede tutabilmek için bulk-fill kompozit rezinlerin LED ışık kaynağının soft modu ile polimerize edilmesi daha faydalı olabilir.

Keywords

Bileşik rezinler, diş pulpası, LED dental sertleştirici ışıklar, ısı

References

• Bucuta S, Ilie N. Light transmittance and micro-mechanical properties of bulk fill vs. conventional resin based composite. Clin Oral Invest 2014;18:1991–2000.
• Hannig M, Bott B. In-vitro pulp chamber temperature rise during composite resin polymerization with various light-curing sources. Dent Mater 1999;15:275–81.
• Oberholzer TG, Makofane ME, du Preez IC, George R. Modern High Powered Led Curing Lights and Their Effect on Pulp Chamber Temperature of Bulk and Incrementally Cured Composite Resin. Eur J Prosthodont Rest Dent 2012;20:50–5.
• Guiraldo RD, Consani S, Lympius T, Schneider LF, Sinhoreti MA, Correr-Sobrinho L. Influence of the light curing unit and thickness of residual dentin on generation of heat during composite photoactivation. J Oral Sci 2008;50:137–42.
• Danesh G, Davids H, Duda S, Kaup M, Ott K, Schafer E. Temperature rise in the pulp chamber induced by a conventional halogen light-curing source and a plasma arc lamp. Am J Dent 2004;17:203–8.
• 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 2005;72:260–7.
• Mills RW, Jandt KD, Ashworth SH. Dental composite depth of cure with halogen and blue light emitting diode technology. Br Dent J 1999;186:388–91
• Rajesh Ebenazar 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 2010;13:132–5
• Bektas OO, Herguner S, Eren D. Işık kaynaklari, polimerizasyon ve klinik uygulamalar. EU Dis Hek Fak Derg 2006;27:117–24
• Baroudi K, Silikas N, Watts DC. In vitro pulp chamber temperature rise from irradiation and exotherm of flowable composites. Int J Paediatr Dent 2009;19 :48–54.
• Sari T, Celik G, Usumez A. Temperature rise in pulp and gel during laser-activated bleaching: in vitro. Lasers Med Sci 2015;30:577–82.
• Ramoglu SI, Karamehmetoglu H, Sari T, Usumez S. Temperature rise caused in the pulp chamber under simulated intrapulpal microcirculation with different light-curing modes. Angle Orthod 2015;85:381–5.
• Savas S, Botsali MS, Kucukyilmaz E, Sari T. Evaluation of temperature changes in the pulp chamber during polymerization of light-cured pulp-capping materials by using a VALO LED light curing unit at different curing distances. Dent Mater J 2014;33:764–9.
• Leprince J, Devaux J, Mullier T, Vreven J, Leloup G. Pulpal-temperature Rise and Polymerization Efficiency of LED Curing Lights. Oper Dent 2010;35:220–30.
• Yap AU, Soh MS. Thermal emission by different light-curing units. Oper Dent 2003;28:260–6.
• Kleverlaan CJ, de Gee AJ. Curing efficiency and heat generation of various resin composites cured with high intensity halogen lights. Eur J Oral Sci 2004;112:84–8.
• Vandewalle KS, Roberts HW, Tiba A, Charlton DG. Thermal emission and curing efficiency of LED and halogen curing lights. Oper Dent 2005;30:257–64.
• da Silva EM, Penelas AG, Simao MS, Filho JDN, Poskus LT, Guimaraes JG. Influence of the degree of dentine mineralization on pulp chamber temperature increase during resin-based composite (RBC) light-activation. J Dent 2010;38: 336–42.
• Pitt Ford TR, Seare MA, McDonald F. Action of adrenaline on the effect of dental local anaesthetic solutions. Endod Dent Traumatol 1993;9:31–5.
• Yazici AR, Muftu A, Kugel G, Perry RD. Comparison of temperature changes in the pulp chamber induced by various light curing units in vitro. Oper Dent 2006;31:261–5.
• Kim RJ, Son SA, Hwang JY, Lee IB, Seo DG. Comparison of photopolymerization temperature increases in internal and external positions of composite and tooth cavities in real time: Incremental fillings of microhybrid composite vs. bulk filling of bulk fill composite. J Dent 2015;43:1093–8.
• Millen C, Ormond M, Richardson G, Santini A, Miletic V, Kew P. A study of temperature rise in the pulp chamber during composite polymerization with different light-curing units. J Contemp Dent Pract 2007;8:29–37.
• Stewardson DA, Shortall AC, Harrington E, Lumley PJ. Thermal changes and cure depths associated with a high intensity light activation unit. J Dent 2004;32:643–51.
• Kim RJ, Yi A, Eo SH, Lee IB, Seo DG. Temperature changes in bulk-fill resin composite during photopolymerization. Am J Dent 2015;28:241–4.
• Kim RJ, Lee IB, Yoo JY, Park SJ, Kim SY, Yi YA, et al. Real-Time Analysis of Temperature Changes in Composite Increments and Pulp Chamber during Photopolymerization. Biomed Res Int 2015;2015:923808.