research centers


Search results: Found 2

Listing 1 - 2 of 2
Sort by

Article
The Inhibitory Effect of CW CO2 Laser on Carieslike Lesion Initiation on Sound Enamel: an In Vitro Study

Author: Muthenna Sh. Rajab مثنى شعبان رجب
Journal: Tikrit Journal for Dental Sciences مجلة تكريت لعلوم طب الاسنان ISSN: 20731213 Year: 2011 Volume: 1 Issue: 1 Pages: 25-30
Publisher: Tikrit University جامعة تكريت

Loading...
Loading...
Abstract

Abstract
Although CO2 laser irradiation can decrease enamel demineralization, it has still not been clarified which laser wavelength and which irradiation conditions represent the optimum parameters for application as preventive treatment. One of the important applications of the laser is as a caries inhibition treatment of the sound dental tissues. This study aimed to assess the caries preventive potential of various CW CO2 laser parameters, and to explore the effect of laser power density, and the exposure time on the caries inhibition activity. Eighty one extracted human premolar teeth were irradiated with three output power: (1, 2, and 4) W, three spot diameter: (2, 2.83, and 4) mm, and three exposure times: (0.2, 0.4, and 0.8) sec of 10.6ىm CW CO2 laser. Three teeth were used as a control group. All teeth were subjected to carieslike lesion formation by 3.5 pH lactic acid solution for 21 days. The teeth after that were sectioned into ground cross sections and the lesion depths were measured under polarizing microscope. The lesion depths of experimental samples were compared with those of the control samples. A single exposure to CW CO2 laser irradiation was found to be resulted in reduction of the carieslike lesion depths. These reductions were up to 61%. The inhibition activity was related directly to the power density and inversely to the exposure time of CW CO2 laser radiation. The optimal parameters were 33W/cm2 power density and 0.2 exposure time. These finding should be reinforced with more laboratory, animal, and human studies with and without fluoride before clinical applications.

Keywords


Article
Effects of Irradiation of Continuous Wave Carbon Dioxide Laser on Caries Resistance of Deciduous Teeth

Author: Muthenna Sh. Rajab مثنى شعبان رجب
Journal: Tikrit Journal for Dental Sciences مجلة تكريت لعلوم طب الاسنان ISSN: 20731213 Year: 2013 Volume: 2 Issue: 2 Pages: 101-105
Publisher: Tikrit University جامعة تكريت

Loading...
Loading...
Abstract

The objective of this study aimed to assess the caries-preventive potential of various CW CO2 laser parameters, and to explore the effect of the laser power density on the caries inhibition activity.Extracted human deciduous molars were irradiated with three various power densities, by changing the output power, the exposure time, and the spot diameter. The CO2 laser system emitted laser with 10.6μm in wavelength. All teeth were subjected to carieslike lesion formation by 3.5 pH lactic acid for 21 days. The teeth after that were sectioned into ground cross sections and the lesion depths were measured under a polarizing microscope.CW CO2 laser preventive treatments inhibited carieslike lesion progression up to 82%. This effect was improved with increasing power density within the limits of the examined laser parameters.

Keywords

deciduous --- caries --- CW --- CO2 --- laser.

Listing 1 - 2 of 2
Sort by
Narrow your search

Resource type

article (2)


Language

English (2)


Year
From To Submit

2013 (1)

2011 (1)