Peripheral facial nerve palsy (FNP) is a common neuropathy of cranial nerves. However, it is a rare condition in dental treatment and may be associated with local anesthetic injections. Initial trauma to facial nerve cab is usually minor. In this instance, a complete and rapid recovery is expected and most cases resolve within 12 hours. If more extensive damage occurs, nerve palsy can be significant and long lasting. We report a 15-year-old female patient with FNP that developed within 8 hours after a dental procedure. The treatment was continued for 10 days with prednisone and acyclovir. At the end of the 4 ^th day, movement began to return to her face and the symptoms disappeared within 3 weeks period. In dental practice, it should be considered that iatrogenic factors may play a direct or indirect role in FNP, as presented in our case. Clarification of the etiology and treatment of FNP requires a multidisciplinary medical team. Therefore, dentists should be aware of clinical findings along with an essential treatment plan of FNP in dental office.

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Internal derangement is the most common pathological condition affecting the temporomandibular joint (TMJ). Magnetic resonance imaging (MRI) of TMJ is principally directed toward assessment of the soft-tissue abnormalities in terms of internal derangement. This pedagogical article describes anatomy and biomechanics and provides a pictorial overview of the MRI findings of the disc abnormalities of TMJ.

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Objective: The aim of this study was to determine the prevalence of idiopathic osteosclerosis (IO) in a Turkish population on orthopantomographs with respect to age, sex, and lesion characteristics and investigate the lesion's relationship with mandibular canal with the aid of cross-sectional cone-beam computed tomography (CBCT) images. Materials and Methods: 8000 panoramic radiographs taken with two digital orthopantomograph devices over a 10-month period were evaluated. Each patient was assigned an identification number, and demographic information (age, sex), absence/presence of a lesion, and if present, lesion characteristics (localization, dental relationship, size, and shape) were recorded. Additionally, cross-sectional CBCT images of 30 patients with IO were examined in terms of relationship with mandibular canal. Results: 273 IO lesions were detected in 225 patients (130 females, 95 males; mean age: 33.1 years). The majority of lesions were observed in the mandibular premolar and molar areas. IO lesions occurred more frequently among middle-aged individuals and at higher rates among females (3.1%, n = 130) than males (2.8%, n = 95); however, differences by age and sex were not statistically significant (P > 0.05). Cross-sectional images revealed that 80% of the lesions were in contact with mandibular canal. None of the lesions showed any cortical expansion. Conclusions: This large-scale study found IO to have a low prevalence rate among a Turkish population. IO was observed to occur more frequently in females than in males and to be most common among individuals aged 20-29. CBCT results suggested a possible association between IO lesions and mandibular canal.

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Maxillary sinus mucocele is an unusual uncommon benign lesion which develops due to retained secretions and presents as an expansile cystic lesion. Presenting symptoms are nonspecific and mostly due to pressure effects on the orbit or facial deformity. Etiology of such mucoceles is not well understood, and it is postulated that they ensue due to obstruction of the ostium by inflammation or previous procedures such as Caldwell-Luc surgery. De novo origins are rare causing unnecessary investigations and delayed diagnosis and treatment. Endoscopic marsupialization of the mucocele is the surgery of choice, even though complicated cases maybe approached by an external route. We present a case of right maxillary mucocele without an identifiable cause, which is reported due to its rarity and delayed management.

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Cementum is an adaptable component of the periodontium which can respond to functional changes throughout its development, with its formation being characterized by apposition during the final stage of the tooth's life. In some cases, this formation occurs in excess, giving rise to hypercementosis, or other lesions (e.g., cementoblastoma) often presenting similar clinical and imaging features, but they are actually distinct entities requiring different approaches. The objective of the present study is to demonstrate the clinical and imaging characteristics of a case based on a differential diagnosis of these entities. Accurate diagnosis through detailed examination and adequate interpretation of imaging characteristics is essential for appropriate and successful therapy.

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Vascular anomalies include a wide range of tumors and malformations. Among vascular anomalies, hemangioma is the most common. Hemangioma is considered as hamartomatous lesion, and half of these have predilection for head and neck region, but rarely seen in the oral cavity. Here, we report a case of hemangioma in the posterior third of the tongue in a 10-year-old female, which appeared localized well defined, reddish pink and lobulated mass with well-defined margins on intra-oral examination. A well-defined homogeneously hyperechoic space occupying lesion (measuring = 4.4 cm × 4.2 cm) seen on ultrasonography which showed abnormally increased vascularity on color Doppler suggesting a vascular etiology. Further evaluation was done on contrast enhanced computed tomography scan and magnetic resonance imaging, which confirms its vascular nature and diagnosed as a case of hemangioma.

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Aims: The purpose of this study was to investigate the demographic, clinicopathologic and imaging features of dentigerous cysts (DCs) and to review the literature. Materials and Methods: In this study, between 2010 and 2012, we analyzed 18 DCs of 18 patients (9 female, 9 male) whose ages ranged from 13 to 61. Results: Of the 18 DCs, 33% were found in the maxilla and 67% in the mandible. The most common site for DC was the mandibular molar region, and the most frequently involved tooth was the mandibular third molar. About 67% of the cases were found in the right side and 33% in the left side of the jaws. In the 67% of cases, displacement was observed in the involved tooth and/or adjacent teeth. 44% of the DCs partially surrounded the crown (lateral variety) and 56% surrounded the crown of the tooth (central variety). About 39% of cases had symptoms such as pain, swelling and drainage. 6% of the cases were infected, and resorption in the involved tooth was detected. 6% of the cases, DC caused devitalization of the adjacent tooth. Conclusions: The results of this study showed that DCs occurred most frequently in the posterior region of the mandible and related to third molar tooth. The cysts had a tendency to displace associated and/or adjacent teeth. Panoramic radiography is important in finding out these cysts. Computed tomography is recommended for differential diagnosis, expansion and association with neighboring anatomical structures.

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Stafne bone cavity (SBC), commonly known as Stafne bone cyst or defect is mostly asymptomatic, appearing as a unilateral, round or ovoid, radiolucent defect with thick and corticated border. Defects that are referred as pseudocysts generally occur in mandibular molar region, below the mandibular canal at the lingual side of the mandible and may grow slowly in time. They have been also located lingually in the anterior mandible above the mylohyoid muscle, and on the ascending ramus just inferior to mandibular condyle or very rarely buccal region of the ascending ramus. The aim of this case report is to present two unusual cases of SBC detected incidentally during radiographic examination with cone beam computed tomography and magnetic resonance imaging findings. In the first case, significant enlargement caused vestibular resorption of the buccal cortex, which is a rare finding with SBCs and in the second case the large bone resorption reached up to the mental foramen.

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Tuberculosis is one of the oldest and the most fatal diseases in the world. Cervical lymph node calcifications caused by tuberculosis are usually asymptomatic and may be found on a routine panoramic survey. This report describes the case of an asymptomatic 78-year-old patient whose panoramic radiograph showed bilaterally, irregularly shaped, massive, multiple calcified lymph nodes. We suggest that lymph node calcifications may have caused owing to delay in the diagnosis and the successful treatment.

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Central giant cell granuloma (CGCG) of the jaw bones is a rare benign intraosseous lesions that is commonly seen as indolent lesions in the mandible anterior to the first molar. It is a localized osteolytic lesion with the varied biologic behavior of aggression which affects the jaw bones. There is much controversy regarding it arising as a result of trauma and its connection with the giant cell lesion seen in the long bones. Since the lesion is uncommon, does not possess any characteristic clinical or radiologic features, and resembles neoplasms, the diagnosis is initially some odontogenic or non-odontogenic neoplasm till a definitive histologic diagnosis of CGCG is made. CGCG is divided into a rare aggressive variant and a common nonaggressive variant based on the clinical and radiographic features. The present case is a rare aggressive CGCG seen in the posterior mandible associated with mandibular swelling, rapid growth, pain, paraesthesia, and cortical bone perforation.

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A case report of a 45-year-old male who presented with a deep defect in the alveolar crest at the buccal side of the upper right 1 ^st molar strongly suggesting a perforation of the floor of the maxillary sinus and an oro-antral communication. Clinical signs and symptoms supported this diagnosis. After radiographic evaluation with Cone Beam Computed Tomography (CBCT), the diagnosis was shifting away from oro-antral communication. The diagnosis of a residual cyst was established after surgical exploration and removal, and histopathologic evaluation. The maxillary sinus membrane was intact.

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Objective: To obtain normative cephalometric data of upper airway in normal adult population. Materials and Methods: Study included 60 healthy subjects, 30 males and 30 females with age range of 18-40 years with normal skeletal profile, no history of sleep-related disorders, obesity. The cephalometric parameters assessed included airway measurements like size of the tongue, soft palate, dimensions of naso, oro, hypopharynx, and relative positions of hyoid bone and vellaculae. Statistical Analysis: Paired t-test was used T-value <0.05 was considered to be significant. Results: Significant sex dimorphisms were observed in most of the parameters with the exception of upper airway width and length of soft palate. Conclusions: The data provides preliminary details of upper airway assessment in normal individuals. Further correlations can be drawn with the studies comparing airway dimensions in normal individuals and in subjects with sleep-related disorders.

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Aneurysmal bone cyst (ABC), is a rare benign osteolytic bone neoplasm of bone tissue characterized by several sponge-like blood or serum filled, generally non-endothelialized spaces of various diameters that can contain osteoid tissue and osteoclast-like giant cells. In this article, we describe a case of ABC in the mandibular corpus region with clinical, radiological and pathological findings and review the literature concerning the case. A 23-year-old male patient attended to our clinic with the complaint of a mild-pain on the left posterior lower jaw since two months. The superior margin of the lesion was extending between the apical third parts of the roots of the teeth 35-38. Cone beam computed tomography (CBCT) was performed. CBCT Slices revealed an expansile lesion with hydraulic-appearing outer margins above the mandibular canal. Excisional surgical treatment was performed after raising a mucoperiosteal flap and finalized with curette of lesion under local anesthesia. Diagnosis of aneurysmal bone cyst was confirmed by histopathological evaluation. The patient was pain free after six months follow-up, and panoramic radiography showed no evidence of recurrence. The ABC is most common in those regions of the skeleton where there is a relatively high venous pressure and high marrow content. Clinical presentation of the ABC varies from a small, indolent, asymptomatic lesion to rapidly growing, expansile, destructive lesion causing pain, swelling, deformity, neurologic symptoms, pathologic fracture, and perforation of the cortex. As the radiologic and clinical presentation of ABC is extremely variable, histopathologic examination is placed a great emphasis on for the diagnosis.

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Context: Paranasal sinus (PNS) diseases affect a wide range of population and include a broad spectrum of diseases ranging from inflammatory conditions to neoplasms, both benign and malignant. Since their clinical assessment is fraught by the surrounding bony structures; diagnostic radiology is of paramount importance. Aims: This study aims to evaluate the spectrum of PNS diseases on computerized tomography (CT) and correlate their clinical and histopathological findings. Settings and Design: A prospective study one at tertiary care hospital. Subjects and Methods: All patients underwent noncontrast CT (NCCT) of PNSs on multi-detector CT Philips Ingenuity Core 128 multi-slice unit and subsequently underwent functional endoscopic sinus surgery by Hopkins Rod 0° 4 mm endoscope with camera system after that procured specimen was sent for its histopathology. This histopathological diagnosis was correlated with CT diagnosis. Their clinical significance was analyzed statistically. Statistical Analysis Used: All obtained data were compiled in tabulated manner and results were expressed as mean ± standard deviation for the statistical analysis, using Statgraphics Centurion (Version 6.2), Statpoint Technologies, Inc. Virginia 2019. Results: A maximum number of patients were in the age group of 21–30 years. The predominant chief presenting complaint was a headache, followed by nasal discharge. The most common CT diagnosis was chronic sinusitis. Maxillary sinus was the most frequently involved sinus and most common CT inflammatory pattern observed was of sinonasal polyposis. Conclusions: This study proved that CT is an excellent imaging modality for evaluating the normal anatomy, variants, and pathologies of the PNSs with a potential pitfall for the diagnosis of fungal sinusitis.

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Focal cemento-osseous dysplasia (FCOD) is a benign fibro-osseous lesion which changes cancellous bone tissue with each fibrous tissue and cementum-like material, or both together. The teeth that are related to the lesion are vital, and FCOD is generally asymptomatic. FCOD is, usually, found during routine radiographic examination. The etiology and pathogenesis of FCOD are unknown. This lesion is evaluated to be a reactive or a dysplastic process in the periapical tissues. Radiologic images of FCOD change depending on the amount of mineralization. Radiological appearance of FCOD is either only complete radiolocent or only complete radio-opaque or mixed radiolucent, radio-opaque together. In this case report an FCOD is presented, which is located between the first premolar and the second molar on the left side mandible of a 60-year-old female patient. The lesion caused perforation and expansion of alveolar bone. The diagnosis, treatment and 1 year follow-up after surgery are reported.

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Dental implants have become an accepted form of permanent tooth replacement. Advanced imaging studies can be used to determine the suitability of implant placement. Dental computed tomography (CT) has been proved to be an excellent procedure for characterizing the anatomy and dental related abnormalities of the jaws. A number of modalities such as dentascan, cone beam computed tomography (CBCT), dental CBCT software, etc., are now available. This makes the diagnostic process more interactive and increases the diagnostic potential. This article reviews the various imaging modalities available for pre-operative implant site assessment, measurement of bone density, use of radio opaque surgical guide and stimulation of implant placement using computerized application of CT.

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The mandibular second premolar is highly variable developmentally. Agenesis, abnormal tooth germ position, distal inclination of the developing tooth, and impaction are among the reported developmental anomalies. Detection of pathologic lesions associated with an impacted tooth usually requires removal of the tooth and the lesion. The purpose of the present report was to describe the radiographic and histopathologic features of a case of pericoronal radiolucency associated with an impacted mandibular premolar tooth.

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Aim: The aim of this study was to evaluate the use of lateral oblique radiography (LOR) at two different incidence angles for the bucco-lingual topographic localization of the mandibular canal with respect to the lower third molars. Materials And Method: A total of 24 dry jaws bearing at least one third molar were subject to LOR at vertical incidence angles of 0° and -30°. A trained and calibrated examiner measured the distance between the top of the mandibular canal to the most apical point of the third molar, using a digital calliper and individual light box for the radiographs. Based on the analysis of the two measurements (incidence angles of 0° and -30°) and considering the buccal object rule, the observer estimated the location of the mandibular canal, which was classified as lingual, central or buccal to the corresponding third molar. Results were compared with the computerized tomography images (gold standard). Results: The statistical analysis included sensitivity, specificity and accuracy tests. These results showed that LOR (0° e -30°) could be used to determine the bucco-lingual location of the mandibular canal with respect to the third molar. Conclusion: In spite of the magnification, LOR images demonstrated that the technique could be used for this study proposal.

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Dentin dysplasia type I is a genetic defect of dentin formation, which is inherited as an autosomal dominant trait. In this anomaly, the teeth generally appear unremarkable with normal crowns; and it is characterized by normal appearing crowns, absence or severe restriction of root formation, obliterated pulp chambers, and periapical radiolucencies without an obvious cause. Clinically, the teeth can be poorly aligned, drifting and mobile, and can prematurely exfoliate due to abnormal root formation. This condition is rarely encountered in dental practice. Little is known about the specific treatment of this disorder and management of patients with dentin dysplasia has presented with problems. This report documents a rare case of DD type I in a 7-year-old girl and the clinical, radiographical and histopathological findings of this condition.

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Background: Onodi cell is the most common anatomical variant of posterior ethmoidal air cells. Pneumatization patterns of Onodi cell are important clinically due to its proximity to optic nerve and internal carotid artery canal. Multidetector computed tomography (MDCT) provides the best imaging modality for identification and pneumatization pattern of Onodi cell. Objectives: The present study is done to know the patterns of pneumatization of Onodi cell by 128 slice MDCT. Materials and Methods: This was a retrospective analysis of paranasal sinuses in 1080 cases by MDCT in adults. Axial images of paranasal sinuses were taken by 128 MDCT with further multiplanar reconstruction to identify Onodi cell and their pneumatization patterns. Statistical analysis was done using SPSS version 20, and 95% confidence interval (CI) values were calculated using a confidence Interval calculator for proportional values. Results: A total of 260 cases (24.07%, CI - 21.52%–26.62%) showed Onodi cell among the total 1080 cases included in this study. Males formed more cases than females with 62.69% and 37.31%, respectively, Type II was the most common pattern of pneumatization with 56.55% (CI - 50.12–62.18), followed by Type I with 41.53% (CI - 35.54–47.52) and Type III with 1.92% (CI - 0.25–3.59) of cases. Conclusion: Onodi cell is the most common anatomical variation of ethmoidal sinuses with higher prevalence among Asian populations. Their patterns of pneumatization are important clinically to avoid surgical damage to optic nerve and internal carotid artery canals. Onodi cell is better detected with MDCT and helpful for sinonasal surgeons for a better surgical outcome.

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Odontogenic myxoma (OM) is a locally invasive benign tumour of the jaw originating from primordial mesenchymal tooth forming tissues. The average age for patients with OM is 25–30 years. OM has a predilection for posterior mandible. When it occurs in the maxilla, it is more invasive than that in the mandible. The recurrence rate of OM ranges between 10–33% with an average of 25%, hence, proper treatment design and close postoperative follow-up for the initial 2 years has been recommended. This is a case of a 30-year-old female showing a large expansile, rapidly growing lesion on the left side of the face involving left mandibular body and ramus. OM cases of this size and such rapid growth are very few in literature, and hence, makes this case one of the rare cases. Radiological investigations helped us to arrive at a diagnosis which was verified later by pre and postoperative histopathological examination. The patient was treated with left hemi-mandibulectomy and reconstruction was done using free fibula graft with titanium implant. The patient is presently under follow-up.

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Reflections of the invention of W.C. Roentgen reached Turkey in a very short period of time. In the field of medicine, Captain Dr. Esat Feyzi and Captain Dr. Rifat Osman were the first who utilized X-rays in Turkey. Just after the invention of X-rays, the first intraoral radiograms were obtained by Otto Walkhoff and Wilhelm Koenig in Germany and by Frank Harrison in England. The first dental radiology department in Turkey was founded in the Istanbul Darülfünunu Dişçi Mektebi (Istanbul University Faculty of Dentistry) in 1927. Also, dental radiology education started at that time. The first book about radiology was written in 1928, which also was contained information about dental radiology. The first dentist whose profession was radiology was Galip Abdi Rona in Turkey. Rona also presented a paper and made radiology presentations in the first Turkish dental congress between 1 and 5 November 1932. In the beginning of the 1980s, radiology became an independent dental department. Today, in Turkey, there are about 45 dentistry faculties who have radiology departments. A lot of state-of-the-art devices are used not only in faculties but also in private clinics.

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Osteosarcoma is an aggressive malignant tumor of the bone. It can occur in any bone, but long bones are affected more such as femur (42%), tibia (19%), and humerus (10%), compared to short bones such as skull, head, and neck region (<10%). The typical radiographic appearance of sunray pattern and Codman's triangle is highly suggestive of osteosarcoma. Early diagnosis and surgical treatment is the key to high survival rate. Here, we present a case with typical radiographic appearance of osteosarcoma arising from skull and scapula in a 25-year-old male patient.

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Dens invaginatus (DI) is a rare developmental anomaly that results from an invagination of the enamel organ into the dental papilla during odontogenesis. The invagination ranges from a slight pitting (coronal type) to an anomaly occupying most of the crown and root (radicular type). Radicular DI is an unusual dental anomaly. Although a clinical examination may reveal a deep fissure or pit on tooth surface, but radiographic examination is the most realistic way to diagnose the invagination. The objective of this case presentation is to report a rare case of radicular dens invaginatus bilaterally in mandibular premolars.

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Odontogenic myxoma in the jaws is infrequent, accounting for only 3%-6% of odontogenic tumours. The radiological appearance of this tumor is complicated and there exist controversies regarding its internal structure and locularity. The "sunray" or "sunburst" appearance in Odontogenic myxoma has been reported in the literature although rarely. Here we report a case of odontogenic myxoma in the mandible showing sunburst appearance which posed a diagnostic dilemma for the oral radiologists. We also emphasize the usefulness of Cone Beam Computed Tomography in the diagnosis of such lesions.

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