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P 29<br />
Title<br />
DIGITAL RADIOGRAPy EVALuATION OF DENTAL bLEACHING ENHANCED by PLASMA LAMP<br />
Authors<br />
T. K. ROzyLO 1 , M. TARAS 1 , I. ROzyLO-KALINOWSKA 1<br />
Affiliations<br />
1 Medical University of Lublin - Department of Dental and Maxillofacial Radiology, Lublin,<br />
POLAND<br />
Body<br />
Objectives<br />
The aim of the study w<strong>as</strong> to evaluate the optical density of digital radiography images of enamel<br />
and dentine subjected to bleaching.<br />
Methods:<br />
The material consisted of 199 slices of 1 mm thickness obtained from 151 permanent teeth<br />
extracted due to clinical indications – mainly third molars (143 erupted and 33 unerupted).<br />
After being w<strong>as</strong>hed, sandbl<strong>as</strong>ted and polished the slices were conditioned in physiological<br />
saline solution in order to be cleaned of contamination created during preparation. The slices<br />
were radiographed using Digora digital radiography system. Next bleaching agents were applied<br />
in three groups. Group 1: 65 samples treated by Opalescence Xtra Boost containing 38% hydrogen<br />
peroxide. Group 2: 69 samples - Opalescence Xtra Boost with pl<strong>as</strong>ma arc lamp Apollo Elite.<br />
Group 3: 65 samples - Bianco Supreme containing 35% hydrogen peroxide enhanced by pl<strong>as</strong>ma<br />
lamp. Bleaching consisted of three cycles l<strong>as</strong>ting 12 minutes then the samples were once more<br />
radiographed. Optical density w<strong>as</strong> me<strong>as</strong>ured using Digora software in standardized regions<br />
on interest in enamel and dentine. Differences in densities in corresponding are<strong>as</strong> before and<br />
after bleaching were analysed statistically.<br />
Results:<br />
Optical density of hard tissues of teeth decre<strong>as</strong>ed significantly after application of both<br />
bleaching agents, but the decline w<strong>as</strong> more intensive in c<strong>as</strong>e of Bianco Supreme preparation.<br />
Decre<strong>as</strong>e in optical density w<strong>as</strong> higher in dentine than in enamel. Application of pl<strong>as</strong>ma lamp<br />
had no statistically significant effect on the me<strong>as</strong>ured densities.<br />
Conclusion:<br />
Digital radiography optical density me<strong>as</strong>urements were effective in <strong>as</strong>sessment of changes of<br />
density of hard tissues of teeth.<br />
Keywords<br />
Tooth Bleaching,Radiography, Dental, Digital,Radiographic Image Enhancement<br />
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