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Introduction: The aim of this retrospective study was to identify the prevalence and properties of pneumatized articular eminence (PAT) in a group of Turkish population using CBCT.Material and Methods: The subjects for this retrospective study consisted of all 300 adult patients who referred to the Department of Oral Diagnosis and Radiology, Marmara University Faculty of Dentistry, and underwent a single CBCT examination from 2016 to 2017. Age and gender were noted for all patients, and for the cases of pnuematization, sides and type were recorded.Results: Of the 300 patients, 98 (32,0%) had PAT, of whom 43 were female and 55 were male. PAT was seen 14% on bilateral sides, 10% on the right side and 8.7% on the left side. 51% of those which had pneumatization were unilocular and 49% were multilocular Conclusion: CBCT images are a true and confident tool for the exploration of the definite size and pattern of pneumatization and the relationship of pnuematization to the adjacent tissue. ın case of surgical treatment is planned or for the differential diagnosis of suspected cases, panoramic radiographs should be supported with CBCT.

Aim: Due to the presence of submandibular fossa (SF), the posterior mandible is an significant anatomic region which should be taken into consideration before dental surgery. The aim of this study was to assess the SF depth in a group of patients using cone-beam computed tomography (CBCT) retrospectively. Materials and Methods:The subjects for this retrospective study consisted of all 300 adult patients who visited the department of Oral Diagnosis and Radiology at Marmara University, and underwent a single CBCT examination. The CBCT data were picked up from the picture archiving and communications system (PACS) from the period of 2013 to 2016. Bilateral SF depths were evaluated on CBCT images. Three different SF types were categorized according amount of depth: type I; concavity depth <2 mm, type II; concavity depth between 2-3 mm and type III; concavity depth >3 mm. Results: For the right SF depth measurements, 143 patients were found to be type I, 117 patients were type II and 38 patients were type III. For the left SF depth measurements, 150 patients were type I, 116 patients were type II and 42 patients were type III. Type I SF depth was more common in both submandibular fossa. Conclusions: Considering the possible complications, preoperative assessment of SF depth is crucial for safe surgery in the posterior mandible. Use of CBCT enhances comprehensive evaluation of this particular anatomic region.

Objectives: The paranasal sinuses include anatomic structures at the maxillofacial region that matters great importance for the surgeons working in the maxillofacial area. The imaging of anatomic variations of the paranasal sinuses is fundamental to evaluate the predisposing factors for the pathologic changes of paranasal sinuses. The aim of this study is to investigate the prevalence of anatomic variations of the paranasal sinuses by retrospective assessment of cone beam computed tomography (CBCT) images. Methods: The paranasal sinus CBCT images of 300 adult patients who were referred to Marmara University, Faculty of Dentistry, Department of Oral Diagnosis and Radiology were evaluated retrospectively. The paranasal sinus variations and their prevalence were recorded. Results: The prevalence of concha bullosa superior was 7,7%, and concha bullosa media was 54,7%. The prevalence of infraorbital ethmoid cell was 15,3%, agger nasi cell was 52,7% and onodi cell was 52.7%. There was no significant differences prevalence of this anatomic variations between males and females or between different age groups. Conclusions: CBCT is a convenient radiographic examination to evaluate the paranasal sinus anatomic variations. Dental surgeons must be aware of such anatomic variations of the paranasal sinuses.

ÖzAmaç: Temporomandibular eklem hastalıkları (TMD) ve rahatsızlıkları, çene bölgesinde ve ilgili kaslarda ağrı ile ortaya çıkan ve normal konuşma, yüz ifadesi, yeme, çiğneme ve yutma hareketlerini kısıtlayabilen durumları ifade eder. Ultrasonografi (US), invazif olmayan, düşük maliyetli, kullanımı kolay ve iyonlaştırıcı radyasyon olmaksızın ses dalgalarının kullanıldığı, bununla birlikte; diagnostik prosedür olarak TMD teşhisi için doğruluğu kanıtlanmış bir görüntüleme yöntemidir. Bu pilot çalışmanın amacı, temporomandibular eklem hastalıklarında ultrasonografik görüntülemenin tanısal etkinliğinin değerlendirmektir.Gereç ve Yöntem: Temporomandibular eklem (TMe) ile ilgili şikayetleri bulunan, Marmara Üniversitesi Diş hekimliği Fakültesi Oral Diagnoz ve Radyoloji kliniğine başvuran 20 hastanın (kadın, erkek) retrospektif ultrasonografi görüntüleri kondiler yüzey düzensizlikleri, eklem boşluğunda daralma ve efüzyon açısından değerlendirilmiştir.Bulgular: Toplam 20 hasta (% 70 kadın, % 30 erkek, yaş ortalaması :33,75) ve 40 TMe değerlendirilmiş ve % 15 erozivdejeneratif değişiklik, % 82,5 kondiler yüzeyde düzleşme ve % 27 oranlarında artan eklem kapsülü genişliği gözlenmiştir.Sonuç: Ultrasonografi, TMe' nin görüntülenmesi ve rutin klinik uygulamada TMD'nin değerlendirilebilmesi için uygun ve invaziv olmayan bir tekniktir.