Effects of different ceramic and dentin thicknesses on the temperature rise during photocuring
Background/purpose: The aims of this investigation were to describe the effect of different ceramic and remaining dentin thicknesses on substrate temperature during photocuring, and investigate whether the temperature increased by >5.5°C for different dentin/ceramic combinations. Materials and me...
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doaj-91695833bf47483d93efa9458be2e9952020-11-24T22:16:18ZengElsevierJournal of Dental Sciences1991-79022011-12-016421021510.1016/j.jds.2011.09.005Effects of different ceramic and dentin thicknesses on the temperature rise during photocuringWen-Chieh Kuo0Yen-Hsiang Chang1Chun-Li Lin2Jau-Shing Kuo3General Dentistry, Chang Gung Memorial Hospital, Taoyuan, TaiwanGeneral Dentistry, Chang Gung Memorial Hospital, Taoyuan, TaiwanDepartment of Mechanical Engineering, Chang Gung University, Taoyuan, TaiwanGeneral Dentistry, Chang Gung Memorial Hospital, Taoyuan, TaiwanBackground/purpose: The aims of this investigation were to describe the effect of different ceramic and remaining dentin thicknesses on substrate temperature during photocuring, and investigate whether the temperature increased by >5.5°C for different dentin/ceramic combinations. Materials and methods: Three groups of dentin thicknesses of 1.0 (D1.0), 1.5 (D1.5), and 2.0 mm (D2.0), and three groups of ceramic thicknesses of 1.5 (C1.5), 2.5 (C2.5), and 3.5 mm (C3.5) were examined. Temperature changes and the maximum temperature were observed under a high-intensity halogen light (QTH-Atralis 10 ECS program at 1200 mW/cm2 for 30 seconds, Ivoclar Vivadent AG, Schaan, Liechtenstein). Four groups, D1.0–C1.5 (+11°C), D1.5–C1.5 (+7.2°C), D1.0–C2.5 (+6.7°C), and D2–0C1.5 (+5.8°C), demonstrated temperature changes of >5.5°C. Results and Conclusions: A statistical analysis showed that separate individual thicknesses and combinations of dentin and ceramic had significant effects on temperature changes (P<0.01). It was observed that the ceramic exhibited a smaller temperature shielding effect than dentin. Clinically, it would be optimal to preserve the dentin to avoid damaging pulp tissues. Where there is insufficient overall thickness (≤3.5 mm), continuous high-energy output photocuring should be avoided to protect pulp tissues from thermal injury.http://www.sciencedirect.com/science/article/pii/S1991790211000791ceramicdentindentistryphotocuringpulp damagetemperature change |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Wen-Chieh Kuo Yen-Hsiang Chang Chun-Li Lin Jau-Shing Kuo |
spellingShingle |
Wen-Chieh Kuo Yen-Hsiang Chang Chun-Li Lin Jau-Shing Kuo Effects of different ceramic and dentin thicknesses on the temperature rise during photocuring Journal of Dental Sciences ceramic dentin dentistry photocuring pulp damage temperature change |
author_facet |
Wen-Chieh Kuo Yen-Hsiang Chang Chun-Li Lin Jau-Shing Kuo |
author_sort |
Wen-Chieh Kuo |
title |
Effects of different ceramic and dentin thicknesses on the temperature rise during photocuring |
title_short |
Effects of different ceramic and dentin thicknesses on the temperature rise during photocuring |
title_full |
Effects of different ceramic and dentin thicknesses on the temperature rise during photocuring |
title_fullStr |
Effects of different ceramic and dentin thicknesses on the temperature rise during photocuring |
title_full_unstemmed |
Effects of different ceramic and dentin thicknesses on the temperature rise during photocuring |
title_sort |
effects of different ceramic and dentin thicknesses on the temperature rise during photocuring |
publisher |
Elsevier |
series |
Journal of Dental Sciences |
issn |
1991-7902 |
publishDate |
2011-12-01 |
description |
Background/purpose: The aims of this investigation were to describe the effect of different ceramic and remaining dentin thicknesses on substrate temperature during photocuring, and investigate whether the temperature increased by >5.5°C for different dentin/ceramic combinations.
Materials and methods: Three groups of dentin thicknesses of 1.0 (D1.0), 1.5 (D1.5), and 2.0 mm (D2.0), and three groups of ceramic thicknesses of 1.5 (C1.5), 2.5 (C2.5), and 3.5 mm (C3.5) were examined. Temperature changes and the maximum temperature were observed under a high-intensity halogen light (QTH-Atralis 10 ECS program at 1200 mW/cm2 for 30 seconds, Ivoclar Vivadent AG, Schaan, Liechtenstein). Four groups, D1.0–C1.5 (+11°C), D1.5–C1.5 (+7.2°C), D1.0–C2.5 (+6.7°C), and D2–0C1.5 (+5.8°C), demonstrated temperature changes of >5.5°C.
Results and Conclusions: A statistical analysis showed that separate individual thicknesses and combinations of dentin and ceramic had significant effects on temperature changes (P<0.01). It was observed that the ceramic exhibited a smaller temperature shielding effect than dentin. Clinically, it would be optimal to preserve the dentin to avoid damaging pulp tissues. Where there is insufficient overall thickness (≤3.5 mm), continuous high-energy output photocuring should be avoided to protect pulp tissues from thermal injury. |
topic |
ceramic dentin dentistry photocuring pulp damage temperature change |
url |
http://www.sciencedirect.com/science/article/pii/S1991790211000791 |
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