Effect of Stafne bone defect on the adjacent tooth: A review of the literature

Purpose@#This report presents a case of an unusual and rare presentation of Stafne bone defect (SBD) with apical resorption extending from the lower right lateral incisor to the right first premolar. A systematic search of the current literature on cases where SBD affected the adjacent teeth was conducted. @*Materials and Methods@#From 259 identified articles, 114 studies were examined, containing 12 individuals with a mean age of 41.58 years. Ten cases in the anterior mandible and 2 in the posterior mandible were found. @*Results@#The results of SBD varied from apical blunting to severe root resorption, and some cases showed close apical contact with the lesion or involvement of the root without any effect. @*Conclusion@#SBD is an unusual incidental finding in the anterior region of the mandible, and unexpected behavior of the lesion, such as root resorption, must be considered.

Ex vivo evaluation of the root form and root canal morphology of the mandibular first molar using CBCT technology

This study aims to evaluate the root canal system and its curvature and the relationship between the root concavity and the dentin thickness of danger zone in the mandibular first molar using the cone beam CT method. A sum of 101 fresh extracted mandibular first molar were gathered and scanned by CBCT [planmeca romexis 3D] machine. The root canal configuration was evaluated according to Vertucci's classification. Then, the canal curvature was evaluated according to schneider's method in clinical and proximal views. Finally, the relationship between the root concavity and the dentin thickness of danger zone was evaluated using the Pearson correlation coefficient. The most common canal configuration of the mesial roots was vertucci type IV [49.5%], followed by type II [46.5%]. Root canal configuration of the distal root revealed type I in 50.5% and type II in 29.7%. The average angles in proximal dimension for MB, ML, DB and DL canals were 18.80, 18.77, 8.22 and 16.86, respectively. These values in clinical dimension were 22.50, 21.90, 13.83 and 12.04, respectively. No meaningful relationship was found between the dentin thickness and the root concavity of danger zone. The clinician's awareness of the anatomy of the root canal system and the canal curvatures and the internal and external anatomy of the root is helpful and necessary in diagnosis and treatment of the endodontic cases

rare crestal branch of inferior alveolar nerve: case report

Sectional imaging modalities are accurate techniques for the identification and localization of the mandibular canal anatomy and variations. The aim of this study was to evaluate the mandibular nerve accessory branches. Existence of these variations may cause some difficulties in anesthesia and also in surgical procedures such as implant planning. The authors report a rare crestal branching of right mandibular canal in a 49 year old male observed in cone beam computed tomography image. Although this anatomical variation is rare, it should be kept in mind

An asymptomatic giant sialolith of the submandibular gland [case report]

Sialolithiasis is the formation of a calcified obstruction within the salivary duct. It may form in any of the major or minor salivary glands or their ducts. Overall, 80% to 90% of salivary gland stones occur in the submandibular gland. Sialoliths commonly measure from 5 to 10 mm in size and all stones over 10 mm can be reported as sialoliths of unusual size. In this study, we report a large sialolith presenting without clinical symptoms. The CBCT images of a 52-year-old man who referred for implant treatment evaluation of lower jaw showed a large radiopaque mass in floor of mouth. The patient did not have any history of pain or pus, and this sialolith was not his chief complaint. The sialolith was surgically removed. Some sialoliths, despite their remarkable size, can be a diagnostic and therapeutic challenge for the clinician. Appropriate diagnosis and treatment with minimal side effects is very important

[Radiographic evaluation of location and shape of mental foramen in selective Iranian population]

Background and Aim : Mental foramen is one of normal anatomic landmarks of mandible witch is positioned bilaterally. Radiologic position of this landmark was studied in most of populations but so far, there is no precise study in Iranian population. The aim of this study was radiographic evaluation of location and shape of mental foramen in a selective Iranian population

Materials and Methods: This descriptive-analytic study was conducted on 190 panoramic radiographs of patients referring to radiology department of Tabriz dental school for diagnostic purposes, Obtained radiographs were evaluated by two trained radiology specialist in the following manner: Location of mental foramen in relationship with long axis of mandibular teeth on both sides, location of mental foramen in relationship with posterior border of ramus and midline, the vertical position of mental foramen in relationship with lower border of mandible and alveolar crest, assessment of bilateral symmetry and determination of shape of foramen on both sides

Results : The most common location of mental foramen was between first and second premolar of mandible on both sides. The most common shape of foramen on both sides was round and foramens on both sides in 83.68% were symmetric

Conclusion: Significant differences were between our study and other studies in regard to position and shape of mental foramen and the most important justification for these differences is the issue of race differences