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:: Volume 21, Issue 3 (Autumn (Special Issue) 2003) ::
J Dent Sch GYEAR__, 21(3): 29-33 Back to browse issues page
Effects of pulsed Nd:YAG laser on microleakage of composite restorations in Cl V cavities
Amir Ghasemi Corresponding Author: Dr. * 1, Ali Obeidy Dr., Ahmad Azima Dr., Ghassem Ansari Dr.
Abstract:   (9136 Views)

Background & Aim: The purpose of this study was to evaluate the effects of pulsed Nd:YAG laser on decrease of dentinal microleakage beneath the restoration.

Methods & Materials: 32 sound extracted premolar teeth were subjected to two standardized, V shaped, class V cavity preparations on both surfaces of buccal & lingual. Cavities were located at 1-2 mm below the CEJ line. Teeth were devided into two groups of experimental and control in a random manner. 20 and 15 mJ/ pulse laser energies were tested. Etching, bonding and filling were performed using tetric ceram composite material. Al samples were thermocycled for 1000 cycles followed by an immersing period of 1 week in 2% basic fuchin solution. Specimens were then sliced longitudinally and evaluated under a digital scanner for the extent of dye penetration.

Result: Results indicated thet the level of microleakage of laser treated cavities was significantly less than that of untreated cavities for 20 mJ/pulse laser energy (P<0.05). No significant decrease in microleakage level was observed for the 15mJ/pulse laser energy.

Conclusion: The pulsed ND:YAG laser with the energy of 20 mJ/pulse and aforementioned features is appeared to be able to reduce microleakage toward pulp.  

Keywords: composite, dentin, dentinal tubule, teeth, dye penetration
Type of Study: Original Article | Subject: Special
Received: 2010/12/25
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Ghasemi A, Obeidy A, Azima A, Ansari G. Effects of pulsed Nd:YAG laser on microleakage of composite restorations in Cl V cavities. J Dent Sch. 2003; 21 (3) :29-33
URL: http://jds.sbmu.ac.ir/article-1-855-en.html

Volume 21, Issue 3 (Autumn (Special Issue) 2003) Back to browse issues page
مجله دانشکده دندانپزشکی دانشگاه علوم پزشکی شهید بهشتی Shahid Beheshti University Dental Journal
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