13th World Congress for Laser Dentistry

26-28, April 2012

Barcelona, Spain

Meeting Abstract

Sponsors: World Federation for Laser Dentistry

- Oral Presentation 135

TITLE: Use of Diagnodent and methylene blue dye in gap detection of composite filling material.

AUTHORS: Malekpour A, Rikhtegaran S, Pournaghi-Azar F, Ajami A, Sadighi M, Fekrazad R.

Laser Department, Dental Faculty, Tabriz University of Medical Siences, Iran

SOURCE: Med Oral Patol Oral Cir Bucal. 2012 May 1;17(Supplement1):S135.

* doi:10.4317/medoral.17643634

http://dx.doi.org/10.4317/medoral.17643634

Abstract

Introduction: Marginal gap is one of the major pro-blems in composite fillings which leads to microbial microleakage and results in many complicate ,like caries. Early detection of such defect could prevent subsequent problems. There are different in vitro gap detection methods in studies including microscope evaluation, SEM and optical sensors. Limited chair side methods such as optical and tactile evaluation could be used to explore marginal disintegrity, which are not accurate. Diagnodent as a caries detector device in combination with methylene blue(MB) dye have been used to explore other dental problems like root fractures.

Aim of the study: The aim of this study was to use diagnodent with MB in gap detection of composite restorations.

Materials and Methods: 40 extracted human teeth by preparing polished composite fillings on buccal surfaces were used in this study. Using dental composite disks. Samples were immersed in 0.001% MB solution and diagnodent values of composite and dental surfaces and interface areas were recorded. Gap size was measured by microscope.

Results: Diagnodent values of gap area was significantly higher than dental and composite surface values (p0.05). There was a relationn between gap size measured by microscope and diagnodent values.

Conclusion: Diagnodent and MB dye could be used in detection of dental composite marginal gap.