In Vitro Evaluation of Temperature of Pulp Chamber During Composite Resins Polymerization

Year 2005, Volume: 32 Issue: 3 - Volume: 32 Issue: 3, 163 - 169, 01.08.2005

Arzu Müjdeci A. Yeşilyurt O. Gökay

Abstract

The purpose of this in vitro study was to evaluate temperature changes into pulp chamber during composite resin polymerization. 40 extracted human maxillary central teeth were used. Standardized cavities 5mm diameter and 2 mm height were prepared to vestibul surface of each tooth, and the teeth were randomly divided into 4 groups each containing 10 teeth. Apexes of all of the teeth were cut approximately 4 mm apical of the cemento-enamel junction and pulp tissue was removed with hedström files. Thermocouple of a digital thermometer was placed into the pulp chamber of each tooth and controlled with radiography. A flowable Tetric-Flow , a packable Surefil , a hybrid Charisma and an organic modified ceramic based Admira composite resins were applied to these cavities and polymerized with a light-cure devices for 40 s. The increase of temperature was recorded during polymerization. Results were statistically evaluated with Analysis of Variance and Duncan test. The highest increase of temperature was observed in flowable composite group. Statistically significant differences were not found among the other composite groups p

Keywords

Resin composites , polymerization, temperature increase

KOMPOZİT REZİNLERİN POLİMERİZASYONLARI ESNASINDA PULPA ODASINDAKİ ISI DEĞİŞİMLERİNİN İN VİTRO DEĞEİRLENDİRİLMESİ

Abstract

Bu in vitro çal›şman›n amac›, kompozit rezin polimerizasyonu esnas›nda pulpa odas›nda oluşabilecek ›s› değişikliklerini değerlendirmektir. 40 adet çekilmiş maxiller santral insan dişi kullan›ld›. Dişlerin vestibul yüzeylerine 5 mm çap›nda, 2 mm yüksekliğinde standart kaviteler aç›ld›, dişler rasgele 4 gruba ayr›ld›. Dişlerin kökleri mine-sement birleşiminden yaklaş›k olarak 4 mm aşağ›da olacak şekilde kesildi, pulpa dokusu headström eğeler ile uzaklaşt›r›ld›. Her dişin pulpa odas›na digital termometrenin termocouple’› yerleştirildi ve radyografi ile kontrol edildi. Daha sonra bir ak›şkan Tetric-Flow , bir kondanse edilebilir Surefil ,bir hybrid Charisma ve bir ormoser esasl› Admira kompozit rezinler kavitelere yerleştirilerek 40 s ›ş›k cihaz› ile polimerize edildiler. Polimerizasyon esnas›ndaki ›s› art›şlar› kaydedildi. Sonuçlar istatistiksel olarak Varyans Analizi ve Duncan testi ile değerlendirildi. En yüksek ›s› art›ş› ak›şkan kompozit grubunda gözlendi. Diğer kompozit rezinler aras›nda istatistiksel olarak önemli farkl›l›k bulunmad›. p

References

• Dayangaç GB. Kompozit rezin restoras- yonlar. Güneş Kitabevi Ltd. Şti., Ankara, 2000; 2- 39.
• Lee IB, Son HH, Um CM. Rheologic pro- perties of flowable, conventional hybrid and con- densable composite resins. Dent Mater 2003; 19:298-307.
• Nadia MT. Mechanical properties of flowable composites. Saudi Dent J 2001;13:20-4.
• Leinfelder KF, Bayne SC, Swift EJ. Packable composites: overview and technical consideration. J Esthet Dent 1999;11:234-49.
• Charles WW, Keli RK. Advances in res- torative materials. Dent Clin North Am 2001; 45: 7- 27.
• Crispin JB. Contemporary esthetic dentistry: practice fundamentals. 3rd Tokyo Quintessence Pub. Co 1994; 61-71.
• Tagtekin DA, Yanıkoglu FC, Bozkurt FO, Kologlu B, Sur H. Selected characteristics of an ormocer and conventional hybrid resin composite. Dent Mater 2004; 20: 487-97.
• Hofmann N, Hogo B, Klaiber B. Effect of irridation type (LED or QTH) on photoactivated composite shrinkage strain kinetics, temperature rise, and hardness. Eur J Oral Sci 2002;110:471-9.
• Althoff O, Hartung M. Advances in light curing. Am J Dent 2000;13(special issue):77-81D.
• Knezeviç A, Tarle Z, Meniga A, Stualo J, Pichler G. Influence of light intensity from different curing units upon composite temperature rise. J Oral Rehabil 2005; 32: 362-7.
• Fujibayashi K, Ishimaru K, Takahashi N, Kohno A. Newly developed curing unit using blue light emitting diyotes. Dentistry in Japan 1998; 34: 49-53.
• Hartung M, Kürsrchner R. Surface hardness and polymerization heat of halogen/LED-cured com- posites. J Dent Res 2001; 80: 41-7.
• Tarle Z, Meniga A, Knezeviç A, Sutalo J, Ristic M, Pichler G. Composite conversion and temperature rise using a conventional, plasma arc and an experimental blue LED curing unit. J Oral Rehabil 2002;29:662-7.
• Goodis HE, White JM, Gamn J, Watanabe I. Pulp chamber temperature changes with visible light cured composites in vitro. Dent Mater 1990; 6: 99-102.
• Lloyd CH. A differential thermal analysis (DTA) for the heats of reduction and temperature rises produced during the setting of tooth colored restorative materials. J Oral Rehabil 1984; 11: 111- 21.
• Mc Cabe JF. Cure performance of light acti- vated composites by differential thermal analysis. Dent Mater 1985;1:231-4.
• Gökay O. Kompozit rezinlerin polimerizas- yonları sırasında pulpada oluşturdukları ısı üzerine farklı ışık polimerizasyon cihazlarının etkileri. A Ü Diş Hek Fak Derg 1993; 20: 1-5.
• Öztürk B, Öztürk AN, Üşümez A, Üşümez S, Özer F. Temperature rise during adhesive and resin composite polymerization with various light curing sources. Oper Dent 2004; 29:325-32.
• Ulusoy N. Akrilik ve kompozit dolgu mad- delerinin polimerizasyon sırasında diş pulpasında meydana getirdikleri ısı değişiklikleri. AÜ Diş Hek Fak Derg 1985;12:673-80.
• Shortall AC, Harrington E. Temperature rise during polymerization of light activated resin composites. J Oral Rehabil 1998; 25:908-13.
• Gökay O, Yoldaş Ç. Işık ile polimerize olan restoratif materyallerin polimerizasyonları esnasında pulpa odasında oluşturdukları ısı değişimlerinin in vitro olarak değerlendirilmesi. AÜ Diş Hek Fak Derg 2000; 27: 37-43.
• Vaidyanathan J, Vaidyanathan TK. Computer controlled differential calorimetry of den- tal composites. IEEE Trans Biomed Eng 1991; 131: 319-5.
• Lloyd CH, Joski A, Mc Glynn E. Temperature rises produced by light sources and composites during curing. Dent Mater 1986; 2: 170- 4.
• Anic I, Pavelic B, Peric B, Matsumoto K. In-vitro pulp chamber temperature rises associated with argon laser polymerization of composite resins. Laser Surg 1996;19:438-44.
• Zach l, Cohen A. Pulp response to externally applied heat. Oral Surg 1965; 19: 515- 30.
• Stewardson DA, Shortall AC, Harrington E, Lumney PJ. Thermal changes and cure depths asso- ciated with a high intensity light activation unit. J Dent Res 2004;32:643-51.
• Bouillaguet S, Caillot G, Forchelet J, Cattani-Lorente M, Wataha JC, Krejci I. Thermal risk from LED and higt-intensity QTH curing units during polymerization of dental resins. J Biomed Mater Res B Appl Biomater 2005; 15: 260-7.
• Hannig M, Bott B. In vitro pulp chamber temperature rise during composite resin polymeri- zation with various light-curing sources. Dent Mater 1999;15:275-81.
• Hussey DL, Biagioni PA, Lamey PJ. Thermographic measurement of temperature change during resin composite polymerization invi- vo. J Dent 1995; 23: 267-71.
• Hansen EK, Asmussen E. Correlation between depth of cure and temperature rise of a light activated resin. Scan J Dent Res 1993; 101:176- 9.
• Önen A, Uygun H. Kompozit dolgu mad- delerinin polimerizasyonları esnasında dişte oluştur- dukları ısı değişikliklerinin incelenmesi. Marmara Ü Diş Hek Fak Derg 1987; 3: 86-90.
• Uhl A, Mills RW, Jandt KD. Polymerization and light induced heat of dental com- posites cured with LED and halogen technology. Biomaterials 2003; 24:1809-20.
• Alexander U, Robin WM, Klaus DJ. Polymerization and light-induced heat of dental com- posites cured with LED and halogen technology. Biomaterials 2003; 24: 1809-20.
• Weerakon AT, Meyers IA, Symons AL, Walsh LJ. Pulpal heat changes with newly developed resin photo-polymerisation systems. Aust Endod J 2002; 28: 108-11.
• Asmussen E, Peutzfeld A. Temperature rise induced by some light emitting diyote and quartz- tungsten-halogen curing units. Eur J Oral Sci 2005;113:96-8.
• Danesh G, Davis H, Duda S, Kaup M, Ott K, Schafer E. Temperature rise in the pulp chamber induced by a conventional halogen light-curing sources and a plazma arc lamp. Am J Dent 2004; 17: 203-8.
• Yap AUJ, Soh MS, Han VTS, Siow KS. Influence of curing lights and modes on cross-link density of dental composites. Oper Dent 2004; 29: 410-15.
• Tsai PCL, Meyers IA, Walsh LJ. Depth of cure and microhardness of composite resin cured with blue LED curing lights. Dent Mater 2004; 20: 364-9.
• Schneider LF, Consani S, Sinhoretti MA, Sobrinho LC, Milan FM. Temperature change and hardness with different resin composites and photo- activation methods. Oper Dent 2005; 30: 516-21.