Nd:YAG laser influence on microleakage of class V composite restoration.
J Clin Laser Med Surg
; 21(4): 227-9, 2003 Aug.
Article
en En
| MEDLINE
| ID: mdl-13678460
OBJECTIVE: The purpose of this research was to evaluate the influence of the Nd:YAG laser on microleakage of class V composite restorations. BACKGROUND DATA: There has been very little research that concerns microleakage resulting from the use of lasers and restorative materials. MATERIALS AND METHODS: Thirty-six cavities were prepared and divided into three groups (n = 12) as follows: Group 1, control; Group 2, Nd:YAG laser irradiation before adhesive technique; Group 3, Nd:YAG laser irradiation after adhesive technique. Nd:YAG laser parameters were 320 micro m of fiberoptics; energy/pulse of 40 mJ of energy/pulse; repetition rate of 15 Hz; power of 0.6 W; pulsed and non-contact, 1 mm from the surface; 30 sec in scanning mode; energy density was 49,76 J/cm(2). Cavities were restored with microhybrid composite. After polishing, thermocycling and impermeabilization procedures were performed and specimens were submitted to a microleakage test, with complete immersion in aqueous solution of 50% silver nitrate for 8 h, in the total absence of light. After washing and drying, teeth were embedded to facilitate buccal-lingual vertical sectioning. Microleakage was revealed by light. RESULTS: We used the Kruskal-Wallis test at a 5% level of confidence and observed no statistically significant difference among the tested groups. CONCLUSION: It was possible to conclude that Nd:YAG laser does not influence marginal microleakage on composite restorations, independent of the moment the laser had been used.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Resinas Compuestas
/
Preparación de la Cavidad Dental
/
Filtración Dental
/
Restauración Dental Permanente
/
Terapia por Láser
Tipo de estudio:
Evaluation_studies
Límite:
Humans
Idioma:
En
Revista:
J Clin Laser Med Surg
Año:
2003
Tipo del documento:
Article
País de afiliación:
Brasil
Pais de publicación:
Estados Unidos