| Ex-vivo evaluation of the intrapulpal temperature variation and fracture strength in teeth subjected to different external bleaching protocols. | |
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MedLine Citation:
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PMID: 21519645 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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This study evaluated the influence of bleaching protocols on intrapulpal temperature and fracture strength of the bleached teeth. Ninety maxillary incisors were assigned to 9 groups (n=10): G1: 35% carbamide peroxide (35% CP), G2: 38% hydrogen peroxide (38% HP), G3: halogen light, G4: LED-laser, G5: 35% CP + halogen light, G6: 38% HP + halogen light, G7: 35% CP + LED-laser, G8: 38% HP + LED-laser, and G9: no treatment (control). Pulp space was widened, a thermocouple was introduced through the apex up to the pulp chamber and the temperature was recorded (°C). The fracture strength (kN) was determined using an Instron machine. Data were analyzed by ANOVA and Tukey's test (p<0.05). The halogen light alone (1.10 ± 0.24) (G3) and associated with 38% HP (1.15 ± 0.30) (G6) produced the highest temperature increase, statistically different (p<0.05) from the other groups. G1 (0.15 ± 0.06) and G6 (0.19 ± 0.07) produced the lowest values, statistically different (p<0.05) from G5 (0.65 ± 0.49). The bleaching protocols increased the temperature, but no increment exceeded the critical value of 5.6°C. Neither 35% CP nor 38% HP or the light sources alone altered the fracture strength of the teeth. |
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Authors:
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Renata Araújo Coelho; Alcides Gomes Oliveira; Aline Evangelista Souza-Gabriel; Silvio Rocha C Silva; Yara T Correa Silva-Sousa; Ricardo Gariba Silva |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Brazilian dental journal Volume: 22 ISSN: 1806-4760 ISO Abbreviation: Braz Dent J Publication Date: 2011 |
Date Detail:
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Created Date: 2011-04-26 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9214652 Medline TA: Braz Dent J Country: Brazil |
Other Details:
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Languages: eng Pagination: 32-6 Citation Subset: D |
Affiliation:
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Dental School, University of Ribeirão Preto, Ribeirão Preto, SP, Brazil. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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