Рентгенология & Радиология, 2011, XLХ 298-304

Frequency of infraossal aproximal bone defects in
maxilla and mandibulla, found with 3D cone beam volumetric tomograp

B. Krastev, E.Popova, P. Kanasirska, G. Yordanov

Periodontal disease is characterized with two types  f bone resorption: horizontal and vertical. The latter is responsible for formation of intraossal bone defects (ID). These defects are treated by regenerative periodontal therapy. The “golden standard” for their diagnosis is a full set of intraoral radiographs, followed by ortopantomographic (OPG) images. With the introduction of 3D cone beam volumetric tomography(CVT) method, which is highly sensitive, many limitations of 2D images are overwhelmed. The aim of the study was to the ability of 3D VCT to discover ID in comparison with 2D OPG; 2) To describe the ID by: sex, age, number of teeth, tooth number, degree of alveolar bone resorption, depth of ID, width of ID, angle of ID, Tooth condition with ID The study used 121 patients who had visited FDM – Plovdiv. 47,1% were man and 52,9% women. Their age was form 11 to 99 years. 2698 were evaluated. We accepted ID with depth (INFRA) ≥3mm. Images were acquired with Galileos (Sirona). First were studied the 2D images for ID and then again with the help of 3D CVT after which the parameters of the ID were recorded. With 2D and 3D were found correspondingly: ID in 20 (16,5%) and 49 (40.5%) patients; 45 (1.66%) and 113 (4.18%) in teeth, with statistical significance (p<0.0001). ID were mainly prevalent in lower jaw (62.8%), and in molars 47,37,36 (26.5%). We found statistically significant more ID with the increase of age and degree of alveolar bone resorption. 3D CVT is significantly more sensitive than 2D OPG. It is advisable that this method is used more frequently in periodontology for diagnosis and evaluation of treatment effect.