In vitro pulp chamber temperature rise from irradiation and exotherm of flowable composites

被引:49
作者
Baroudi, Kusai [1 ,2 ,3 ]
Silikas, Nick [1 ,2 ]
Watts, David C. [1 ,2 ]
机构
[1] Univ Manchester, Sch Dent, Biomat Res Grp, Manchester M15 6FH, Lancs, England
[2] Univ Manchester, Photon Sci Inst, Manchester M15 6FH, Lancs, England
[3] Al Baath Univ Hama, Sch Dent, Dept Paediat Dent, Hama, Syria
关键词
LIGHT-CURING SOURCES; DENTAL MATERIALS; POLYMERIZATION; RESTORATIVES; HEAT;
D O I
10.1111/j.1365-263X.2007.00899.x
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
International Journal of Paediatric Dentistry 2009; 19: 48-54 The aim of this study was to investigate the pulpal temperature rise induced during the polymerization of flowable and non-flowable composites using light-emitting diode (LED) and halogen (quartz-tungsten-halogen) light-curing units (LCUs). Five flowable and three non-flowable composites were examined. Pulpal temperature changes were recorded over 10 min in a sample primary tooth by a thermocouple. A conventional quartz-tungsten-halogen source and two LEDs, one of which was programmable, were used for light curing the resin composites. Three repetitions per material were made for each LCU. There was a wide range of temperature rises among the materials (P < 0.05). Temperature rises ranged between 1.3 degrees C for Filtek Supreme irradiated by low-power LED and 4.5 degrees C for Grandio Flow irradiated by high-power LED. The highest temperature rises were observed with both the LED high-power and soft-start LCUs. The time to reach the exothermic peak varied significantly between the materials (P < 0.05). Pulpal temperature rise is related to both the radiant energy output from LCUs and the polymerization exotherm of resin composites. A greater potential risk for heat-induced pulp damage might be associated with high-power LED sources. Flowable composites exhibited higher temperature rises than non-flowable materials, because of higher resin contents.
引用
收藏
页码:48 / 54
页数:7
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