IADR Abstract Archives
In-vitro pulp chamber temperature rise during polymerization of Bulk Fill composite resins
Objectives: The purpose of this in vitro study was to evaluate temperature changes into pulp chamber during polymerization of Bulk Fill composite resins.
Methods: 40 extracted human mandibular molar teeth were used. Standardized Class II cavities were prepared to 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 (Digital Meter, Microprocessor Thermometer, Model 6801 II, Minnesota Measurement Instruments, USA) was placed into the pulp chamber of each tooth and controlled with radiography. Four Bulk Fill composite resins (X-tra Fil, N Ceram Bulk Fill, Filtek Bulk Fill, Admira Fusion X-tra) were applied to cavities using mylar strips and polymerized with a LED light-cure device for 20 s. from occlusal surfaces ( (Monitex Industrial Co. Ltd.,6F, 70 Guang-Fu Road Sec. 1, San-Chong City, Taipei, Taiwan). The maximum increase of temperature was recorded during polymerization of Bulk Fill composite resins.
Results: Results were statistically evaluated with Analysis of Variance and Duncan test. The maximum peak of temperatures of all composite groups were found lesser than 5,5 C degree and statistically differences were not found among the Bulk Fill Composites (p<0.05).
Conclusions: In the limitations of our research , we find out maximum 5,5 degree of pulp chamber temperature rise during polymerization of Bulk Fill composite resins . Our reasearch could be supported by in vitro researchs.
Methods: 40 extracted human mandibular molar teeth were used. Standardized Class II cavities were prepared to 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 (Digital Meter, Microprocessor Thermometer, Model 6801 II, Minnesota Measurement Instruments, USA) was placed into the pulp chamber of each tooth and controlled with radiography. Four Bulk Fill composite resins (X-tra Fil, N Ceram Bulk Fill, Filtek Bulk Fill, Admira Fusion X-tra) were applied to cavities using mylar strips and polymerized with a LED light-cure device for 20 s. from occlusal surfaces ( (Monitex Industrial Co. Ltd.,6F, 70 Guang-Fu Road Sec. 1, San-Chong City, Taipei, Taiwan). The maximum increase of temperature was recorded during polymerization of Bulk Fill composite resins.
Results: Results were statistically evaluated with Analysis of Variance and Duncan test. The maximum peak of temperatures of all composite groups were found lesser than 5,5 C degree and statistically differences were not found among the Bulk Fill Composites (p<0.05).
Conclusions: In the limitations of our research , we find out maximum 5,5 degree of pulp chamber temperature rise during polymerization of Bulk Fill composite resins . Our reasearch could be supported by in vitro researchs.