Kawaguchi FA, Eduardo CP, Matos AB. Nd:YAG laser influence on microleakage of class V composite restoration.
Photomed Laser Surg 2004;
22:303-5. [PMID:
15345172 DOI:
10.1089/pho.2004.22.303]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVE
The purpose of this research was to evaluate Nd:YAG laser influence on microleakage of class V composite restorations.
BACKGROUND DATA
There are few studies concerning laser with restorative materials, considering microleakage. One more sent.
METHODS
Thirty six cavities were prepared and divided into three groups (n = 12): group 1, control; group 2, Nd:YAG laser irradiation before adhesive technique; group 3, Nd:YAG laser irradiation after adhesive technique was used as the single bottle. Adhesive system Nd:YAG laser parameters were 320 microm of fiberoptic; 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 seconds in scanning mode; energy density was 49.76 J/cm(2). Cavities were restored with microhybrid composite. After having used a polishing technique, thermocycling and impermeabilization procedures were performed and specimens were submitted to a microleakage test consisting of immersion in aqueous solution of 50% silver nitrate for 8 h, in the total absence of light. After washing and drying procedures, teeth were embedded to facilitate buccal-lingual vertical sectioning. Microleakage was revealed by light.
RESULTS
We accomplished Kruskal-Wallis test at 5% level of confidence and observed no statistically significant difference between the tested groups.
CONCLUSIONS
Based on the obtained results, it was possible to conclude that Nd:YAG laser in the parameters used, has no influence on marginal microleakage in composite restorations, independent of the moment the laser was used.
Collapse