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Evaluation of digital subtraction radiography in detection of periodontitis Host Publication: 42nd annual meeting of IADR-Continental European and Israeli Divisions, September 26-29, 2007, Thessaloniki, Greece Authors: T. Ionescu, D. Chiru, C. Boca and P. Bottenberg Publication Year: 2007
Abstract: Objectives: To evaluate in vitro the performance of digital subtraction radiography in the diagnosis of periodontal bone defects.
Methods: Human dentate mandibular and maxillary bone samples were mounted on an optical bench encompassing a Xray source (Satelec X-mind), an orientable sample holder and a CCD sensor (Gendex Visualix). X-ray images were acquired before and after inducing a set of bone defects of gradually increasing size, using rotary and hand instruments. The radiographs thus obtained were subtracted using a mutual information based subtraction software. Evaluation of the radiographs was done by a group of 6 observers using a software interface dedicated to this study. In the first evaluation round, successive images were compared against the baseline radiograph, and observers were instructed to delineate the extent of the lesions. In the second evaluation round, subtraction images were presented and lesions were again delineated.
Results: The accuracy in evaluation the extent of periodontal defects was found to be significantly improved for small defects when using subtraction radiographs. For more extensive lesions, no statistically significant differences were found between results obtained from serial radiographs and subtraction images.
Conclusion: Digital subtraction radiography was shown to significantly improve the early detection of bone loss in periodontal disease patterns.
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