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Aim: The aim of this study is to evaluate the relationship between nasal septum deviations, volumes of paranasal sinuses and Lund-Mackay scores related with the presence of rhinosinusitis in conebeam computed tomography images, which is currently been used in dental radiology. Material and method: CBCT images of 130 patients aged between 18 and 79 years with paranasal sinus area in our study were evaluated retrospectively. The correlation between the Lund-Mackay scores related with the presence of rhinosinusitis, the paranasal sinus volumes and nasal septum deviations which is an anatomic variation commonly seen in the community were examined. Results: Of the 130 patients who constituted the study group, 103 (79.2%) had nasal septum deviations, 53 (51.5%) to the right and 50 (48.5%) to the left. The total Lund-Mackay scores of individuals with nasal septum deviation were significantly higher than those without nasal septum deviation (p≤0.05). According to the results of our study, right and left maxillary, frontal, sphenoid and ethmoid sinus volumes were 13.6 cm³, 14.5 cm³, 6.2 cm³, 9.7 cm³, 8.7 cm³ respectively. Conclusion: As an alternative of Computed Tomography, which is accepted as gold standard to evaluate the relationship between nasal septum deviation and paranasal sinus volume with the presence of rhinosinusitis, Cone Beam Computerized Tomography, which allows a 3-dimensional radiological examination with a lower dose of radiation, may be used instead.

Objective: Recent researches provided an overview for advantages, disadvantages and indications/contraindications of Cone-Beam Computed Tomography (CBCT) as well as some thoughts on the current educational status of CBCT in dental schools. Reviews of recent publications reveal that CBCT is an important tool in the diagnostic process, even it plays an integral role in treatment planning and outcome assessment at different departments like maxillofacial surgery, orthodontics, periodontology and endodontics. The aim of present study is to find out the indications and the most frequently used ones by reviewing the indications of CBCT at Dentomaxillofacial Radiology (DMFR) clinic, which were referred by other clinics/departments of the hospital. Materials and Method:1590 CBCT indications defined from 1503 patients and their reports retrieved from the archieves of the DMFR clinic. Besides; referral reports, and Field of View (FOV-region) were also noted. Results: CBCT imaging has mostly focused on applications for dental implant planning, impacted tooth extraction, orthodontic purposes and temporomandibular joint imaging. Conclusion:CBCT is a 3D diagnostic tool contributing additional information to the clinical situation if the appropriate indication is used with the right FOV selection. In addition, the recent spread of implant treatments has led to the use of CBCT for implant planning.