Microleakage in class V composite resin restorations treated with CO2 laser: an in-vitro study

Andrea Naddeo Lopes da Cruz; Narciso Garone Netto; Adriana Fruges Pagliari; Juliana Matson; Ricardo Scarparo Navarro; Carlos de Paula Eduardo; Denise Maria Zezell

doi:10.1117/12.380846

24 March 2000 Microleakage in class V composite resin restorations treated with CO₂ laser: an in-vitro study

Andrea Naddeo Lopes da Cruz, Narciso Garone Netto, Adriana Fruges Pagliari, Juliana Matson, Ricardo Scarparo Navarro, Carlos de Paula Eduardo, Denise Maria Zezell

Author Affiliations +

Proceedings Volume 3910, Lasers in Dentistry VI; (2000) https://doi.org/10.1117/12.380846
Event: BiOS 2000 The International Symposium on Biomedical Optics, 2000, San Jose, CA, United States

Abstract

Various materials and techniques have been investigated in order to minimize or eliminate microleakage in composite restorations. The CO₂ laser (10.6 micrometer) removes the smear layer and creates an irregular surface able to promote micromechanical retention for adhesive restorative materials. Forty Class V cavities were performed with high-speed drill in 20 extracted human molar and randomly divided into 4 different groups: Group 1 -- CO₂ laser (3 W, 2 Hz, 50 ms) and after 37% phosphoric acid etching on dentin and enamel surface; Group 2 -- 37% phosphoric acid etching and after CO₂ laser; Group 3 -- CO₂ laser; Group 4 -- 37% phosphoric acid etching. The cavity restored with composite resin (Z-100) and thermally stressed (700 cycles, 5 - 55 degree Celsius). After the samples were impermeabilized, immersed in 50% silver nitrate solution for 8 hours and sectioned with Isomet saw. The teeth were exposed to Photoflood light (G.E.) for 5 minutes to reveal the dye. Leakage was observed under stereomicroscope and evaluated with scores. Results were analyzed with ANOVA (p greater than 1%) and Tukey's test (p equals 5%) and showed significant lower microleakage in the group treated only with CO₂ laser and phosphoric acid etching alone (group 3 and 4) than groups treated with phosphoric acid and CO₂ laser together (group 1 and 2).

Citation Download Citation

Andrea Naddeo Lopes da Cruz, Narciso Garone Netto, Adriana Fruges Pagliari, Juliana Matson, Ricardo Scarparo Navarro, Carlos de Paula Eduardo, and Denise Maria Zezell "Microleakage in class V composite resin restorations treated with CO₂ laser: an in-vitro study", Proc. SPIE 3910, Lasers in Dentistry VI, (24 March 2000); https://doi.org/10.1117/12.380846

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available