Pulpal temperature increase with high-speed handpiece, ER : YAG laser and ultrasound tips
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Data
2008-05-01
Autores
Mollica, Fernanda Brandao [UNESP]
Camargo, Fernanda Pelogia [UNESP]
Zamboni, Sandra Costa [UNESP]
Braga Pereira, Sarina Maciel [UNESP]
Teixeira, Symone Cristina [UNESP]
Nogueira Junior, Lafayette [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade de São Paulo (USP), Faculdade de Odontologia de Bauru
Resumo
The aim of this study was to compare intrapulpal temperature increase produced by high-speed handpiece, Er:YAG laser and CVDentus ultrasound tips during cavity preparation. Thirty bovine mandibular incisors with an enamel/dentin thickness of 4 mm at buccal surface had their roots amputated and were allocated to the following groups (n=10): Group I- high-speed handpiece; Group II- noncontact Er:YAG laser (250 mJ/4Hz); and Group III- CVDentus ultrasouns tips. All devices were used with water cooling. Class V cavities were prepared to a depth of 3.5 mm, measured with a periodontal probe. A type T thermocouple was placed inside the pulp chamber to determine the temperature increase (degrees C), which was recorded by a data acquisition system ADS 2000 IP (Lynx Technology) linked to a notebook computer. Data were analyzed statistically by oneway ANOVA and Tukey's test (p=0.05). The mean temperature rises were: 1.10 degrees C ( 0.56) for Group 1, 0.84 degrees C (0.55) for Group II, and 3.00 degrees C (1.34) for Group III. There were no statistically significant differences (p > 0.05) between Groups I and II, but both of them differed significantly from Group III (p < 0.05). In conclusion, the use of Er:YAG laser and high-speed handpiece for cavity preparation resulted in similar temperature increase. Although ultrasound tips generated significantly higher intrapulpal temperature increase, it remained below the critical value of 5.5 degrees C and may be considered safe for use.
Descrição
Palavras-chave
dental pulp, dental cavity preparation
Como citar
Journal of Applied Oral Science. Bauru-sp: Univ São Paulo Fac Odontologia Bauru, v. 16, n. 3, p. 209-213, 2008.