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Showing 3 results for Cone-Beam Computed Tomography
Nasopalatine duct cyst radiographic finding and its surgical management: A case report
Arash Sarrafzadeh, Maryam Mohebiniya, Soheila Jadidi,
Volume 36, Issue 0 (5-2023)
Abstract
Background and Aims: The incisive canal cyst also known as nasopalatine duct cyst (NPDC) is the most common developmental non odontogenic cyst and it is usually asymptomatic with a well corticated round, ovoid or in some cases unique heart shaped radiolucent radiographic finding. Its accurate diagnosis from odontogenic cysts, odontogenic tumor, and benign non-odontogenic tumors using clinical and radiographic findings leads to eradication of pathologic condition with minimum residual defects and patient discomfort. In this case report, the clinical and radiographic findings of a 60-year-old female with the chief complaint of swelling was reviewed. There were typical histologic and radiographic findings related to nasopalatine duct cyst. The surgical management is explained. Follow up visit showed satisfactory healing and no dehiscence. It could be suggested that heart shaped radiographic finding in 3-D reconstructed image in the maxillary midline would be a good predictor for NPDC.

Evaluation of diagnostic accuracy of panoramic radiography according to cone beam computed tomography in the detection of relationship between mandibular third molar teeth and inferior alveolar nerve
Nima Biuki, Mohammad Aghaali, Allahyar Jahangir, Ali Saleh, Mahboubeh Pourabdollahi, Aida Mehdipour,
Volume 38, Issue 0 (4-2025)
Abstract
Background and Aims: Third molar teeth extraction is one of the common treatments procedure in dentistry. The proximity of mandibular third molar teeth to the inferior alveolar nerve canal may make the surgery challenging and cause adverse complications. The purpose of this study was to determine the accuracy of diagnostic and evaluation of panoramic radiography findings in two classification methods (Rood-Shehab and Tanaka) according to CBCT in mandibular third molar extraction surgery.
Materials and Methods: This cross-sectional analytical study was conducted on 65 patients of a private radiology clinic in Qom who had simultaneous panoramic and CBCT radiography. Panoramic and CBCT radiographs were imported into Scanora and Ondemand softwares, respectively. The relation of the mandibular third molar with the inferior alveolar nerve was evaluated according to Tanaka's classification and Rood-Shehab radiographic signs and compared with CBCT radiographs. Finally, the obtained data were analyzed by chi-square test, ROC curve and SPSS software version 24. The significant level was considered at P<0.05.
Results: Out of 65 samples, 23.1% were men and 76.9% were women. The mean age of participants was 26.9±8.77. There was a significant relation between the Tanaka's classification of panoramic radiographs and proximity to the nerve in CBCT radiographs (P=0.011). This relationship was significant when the number of radiographic signs of the Rood-Shehab classification increased (P=0.044). Root darkening and diversion of mandibular nerve canal signs of Rood-Shehab classification showed more diagnostic accuracy in the nerve canal contact determination than that of other signs.
Conclusion: The probability of contact of third molar root with the inferior alveolar nerve canal increases with increasing in the number of Rood-Shehab radiographic signs. The root darkening sign was more accurate and followed by mandibular canal diversion sign. Tanaka’s classification can be used in differentiating cases without contact to the nerve canal.

Evaluation of the prevalence of root resorption in teeth adjacent to impacted maxillary canines using cone-beam computed tomography
Aydin Alipour, Ehsan Moudi, Seyedali Seyedmajidi, Meisam Moradi, Reza Faraji,
Volume 39, Issue 0 (3-2026)
Abstract
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Background and Aims: Root resorption of teeth adjacent to impacted canines, although relatively uncommon, is a potentially harmful condition that may lead to tooth loss. Early diagnosis and the use of accurate imaging techniques play a crucial role in preventing from root resorption complications. This study aimed to evaluate the prevalence of root resorption in teeth adjacent to impacted maxillary canines using cone-beam computed tomography (CBCT) images.

Materials and Methods: In this retrospective observational-analytical study, 60 CBCT images of patients with impacted maxillary canines (15 bilateral case and 45 unilateral cases) were examined using a convenience sampling method among those referred to oral and maxillofacial radiology clinics in northern Iran, Babol, in 2023. Variables such as age, gender, position and direction of canine eruption, presence of root resorption in adjacent teeth, type of affected tooth, severity, and location of resorption were evaluated. Data were analyzed using the chi-square test in SPSS software at a significance level of 0.05.

Results: Among the studied CBCT (66.7% female; 70% over 18 years of age), 75 cases of impaction (41 cases on the right and 34 cases on the left) were observed. Root resorption in the teeth adjacent to the impacted maxillary canines was observed in only 7 patients (11.7%). All resorptions were mild and observed in the lateral incisors. In terms of vertical position, 85.7% of the cases occurred in the middle third of the root. There was no statistically significant association between root resorption and gender, age, or the position or direction of canine eruption (P>0.05).

Conclusion: Given the potential for root resorption in lateral incisors and in the middle third of the root, it is recommended that oral and maxillofacial surgeons and orthodontists perform a thorough initial evaluation of the canine’s position and adjacent teeth using CBCT imaging prior to treatment to prevent possible complications.


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