Program including abstracts as pdf available here
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P 17<br />
Title<br />
FRACTAL DIMENSION ANALySIS OF PERIODONTITIS-INDuCED INTERDENTAL bONE<br />
CHANGES<br />
Authors<br />
E. SOGuR 1 , b.G. bAKSI 1 , S CINARCIK 2<br />
Affiliations<br />
1 Ege University, School of Dentistry, Department of Oral & Maxillofacial Radiology, Izmir, TUR-<br />
KEY, 2 Ege University, School of Dentistry, Department of Periodontology, Izmir, TURKEY<br />
Body<br />
Objectives: The aim of this study w<strong>as</strong> to evaluate the capability of fractal analysis to discriminate<br />
the changes in the trabecular structure of interdental bone between individuals with<br />
healthy gingiva or periodontitis using storage phosphor plate (SPP) images.<br />
Methods: Two groups of patients were included in the study according to the pocket probing<br />
depth, bleeding on probing and attachment loss. The first group (n= 50) consisted of individuals<br />
with healthy gingiva, while the other group consisted of patients with moderate periodontitis<br />
(n=50). Periapical images obtained with Digora® Optime SPP system during clinical examination<br />
of the patients were used for the fractal dimension (FD) calculations. Two rectangular<br />
regions of interest (ROIs) were placed at mandibular posterior interdental bone are<strong>as</strong>. The sizes<br />
of the ROIs were dictated by the size of the interdental bone are<strong>as</strong>. Mean of the two ROIs w<strong>as</strong><br />
used to calculate mean FD by using the box-counting method. Student’s t-test w<strong>as</strong> used for the<br />
comparison of FDs of two groups (p= 0.05).<br />
Results: The mean FD of periodontitis patients w<strong>as</strong> 0.83 ± 0.08, while it w<strong>as</strong> 1.02 ± 0.09 for<br />
the patients with healthy gingiva. Extremely significant difference w<strong>as</strong> obtained in the mean<br />
FD values of healthy individuals and patients with periodontitis (p< 0.0001). Patients with<br />
periodontitis demonstrated lower FD values than patients with healthy gingiva.<br />
Conclusion: Fractal analysis can quantitatively discriminate the trabecular integrity alterations<br />
induced by periodontitis and t<strong>here</strong>fore; can be recommended for the screening and monitoring<br />
of changes in trabecular architecture <strong>as</strong>sociated with periodontitis.<br />
Keywords<br />
periodontitis/radiography,fractals,alveolar bone loss/radiography<br />
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