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The evaluation of idiopathic osteosclerosis on panoramic radiographs with an investigation of lesion's relationship with mandibular canal by using cross-sectional cone-beam computed tomography images
Melda Misirlioglu, Rana Nalcaci, Mehmet Zahit Adisen, Selmi Yilmaz
May-August 2013, 1(2):48-54
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.
  13,260 694 1
Facial nerve paralysis after dental procedure
Melda Misirlioglu, Mehmet Z Adisen, Alime Okkesim, Yagmur Y Akyil
September-December 2016, 4(3):80-82
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.
  10,813 234 1
Magnetic resonance imaging of temporomandibular joint disc abnormalities: A pictorial essay
Galal Omami
September-December 2013, 1(3):99-103
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.
  9,593 1,058 1
Haemangioma of tongue: A rare case report
Sachin Khanduri, Deepak Agrawal, Garima Varshney, Nidhi Singh
January-April 2015, 3(1):25-27
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.
  8,534 456 -
Residual cyst with a misleading clinical and radiological appearance
Najwa Karam, Fawzi Karam, Ibrahim Nasseh, Marcel Noujeim
January-April 2013, 1(1):17-20
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.
  7,898 729 -
Cephalometric evaluation of upper airway in healthy adult population: A preliminary study
Kruthika S Guttal, Krishna N Burde
May-August 2013, 1(2):55-60
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.
  6,931 723 1
A rare condition affecting the primary and permanent dentition: Dentin dysplasia type I
Ahmet Ercan Sekerci, Meryem Etoz, Halil Sahman, Yildiray Sisman, Sinan Nazlim
January-April 2013, 1(1):13-16
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.
  5,948 449 -
Role of computed tomography imaging in dental implantology: An overview
Hemchand Surapaneni, Pallavi Samatha Yalamanchili, Ravi Shankar Yalavarthy, Arunima Padmakumar Reshmarani
May-August 2013, 1(2):43-47
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.
  5,485 860 1
Buccal-lingual localization of the mandibular canal in relationship with the third molar using the lateral oblique technique
Gainer Raul Jasa, Mariana Boessio Vizzotto, Priscila Fernanda da Silveira, Heloisa Emilia Dias da Silveira, Heraldo Luis Dias da Silveira, Leticia Ruhland Correa, Tabare Raveca
January-April 2014, 2(1):15-20
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.
  5,286 638 2
Bilateral bifid mandibular condyle: Report of a case with condylar fractures
Elif Tarim Ertas, Halil Sahman, Meral Yircali Atici
May-August 2013, 1(2):80-82
Bifid mandibular condyle is an uncommon anatomic variation with a varied etiology implicated with its development. It can be symptomatic or the majority of the cases are diagnosed incidentally during radiographic examination. Bifid mandibular condyle may have a developmental origin or may occur secondary to trauma. The purpose of this paper is to report a case with bilateral bifid mandibular condyles associated with a history of condylar fractures presented with computed tomography and panoramic radiography findings.
  5,484 264 -
Aggressive central giant cell granuloma of the mandible, a diagnostic dilemma
Pavitra Baskaran, Margathavalli Gopal, Varun Rastogi, Satya Ranjan Misra
September-December 2015, 3(3):88-91
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.
  5,184 458 -
A case report of pyknodysostosis with cleidocranial dysplasia: Computed tomography and panoramic imaging
Dharmraj Meena, Mohammed Zuber, Samadhan Pawar, Shweta Rani
January-April 2013, 1(1):25-29
Pyknodysostosis is an extremely rare autosomal recessive genetic osteosclerotic disorder caused by cathepsin K deficiency leading to decrease in the bone turnover. It is characterized by short stature, brachycephaly, short and stubby fingers, open cranial sutures and fontanelle, and diffuse osteosclerosis. Multiple fractures of long bones and osteomyelitis of the jaw are frequent complications. We describe a 28-year-old male with clinically as well as radiologically multislice computed tomography (CT) and panoramic studies of pyknodysostosis. The purpose of multislice CT of the jaw was to understanding of the complete abnormal facial anatomy and is useful for planning of tooth extraction and/or implantation of prosthetics as well as to know earlier changes of dental abscess and/or carries development.
  4,945 264 -
Latest advancements in imaging of oral and maxillofacial neoplasm: A comprehensive review
Devvrat Singh, Sukant Sahoo, Vineet Gupta, Deepti Srivastava
May-August 2013, 1(2):37-42
Radiographic imaging is one of the greatest investigative tools that are used in medical sciences since ages. There is an important role of imaging in staging, during treatment planning, and post-treatment follow up of patients with head and neck cancer. To design an effective treatment strategy, two tasks are very important which are accurate staging and timely assessment of the cancer. There lies the importance of pre-treatment imaging in diagnosis. Awareness of the presence of cervical node metastasis is important in treatment planning and in prognostic prediction for patients with head and neck cancer. Currently, MRI and CT are commonly used to evaluate the primary tumor and the neck status. They characterize the cervical lymph nodes dependent on morphological criteria. Doppler ultrasound and Positron emission tomography are also used to overcome some of the limitations of MRI and CT.
  4,350 801 2
Aneurysmal bone cyst of the mandible: Report of a case with a review of the literature
Hasan Onur Simsek, Derya Yildirim, Ozlem Gormez, Esra Yuce, Fatma Nilgun Kapucuoglu
May-August 2014, 2(2):64-67
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.
  4,699 403 1
Dentigerous cysts of the jaws: Clinical and radiological findings of 18 cases
Erzurumlu Zerrin, Demirturk Kocasarac Husniye, Celenk Peruze
September-December 2014, 2(3):77-81
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.
  4,101 585 -
Tuberculous lymph node calcification detected on routine panoramic radiography: An unusual case
Kaan Gunduz, Gozde Canitezer, Hakan Avsever
May-August 2014, 2(2):61-63
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.
  4,343 229 -
Pericoronal radiolucency associated with an impacted premolar tooth
Ulkem Aydin, Ufuk Ates, Burcu Senguven
January-April 2014, 2(1):30-34
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.
  4,188 353 -
Investigation and differential diagnosis of Stafne bone cavities with cone beam computed tomography and magnetic resonance imaging: Report of two cases
Elif Tarim Ertas, Meral Yircali Atici, Fahrettin Kalabalik, Ozlem Ince
September-December 2015, 3(3):92-96
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.
  4,162 333 1
Bilateral radicular dens in dente in mandibular premolars
Kanika Gupta Verma, Suman Basavaraju, Sahil Jindal, Suresh Sachdeva
September-December 2013, 1(3):115-117
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.
  3,896 264 -
Peripheral osteoma of the mandible with radiologic and histopathologic findings
Asli Tanrivermis Sayit, Gokhan Kutlar, Ilkay Sedakat Idilman, Pinar Hediye Gunbey, Asuman Celik
January-April 2014, 2(1):35-37
Osteomas are benign, slow growing osteogenic tumors. They are often occurring in the craniofacial bones but rarely originates from the mandible. Osteomas have three varieties as central, peripheral and extraskeletal. Central and peripheral osteomas are often seen in the facial bones. Peripheral osteoma often located in the frontal, ethmoid and maxillary sinus, but rarely occurs in the jaws. Usually they are asymptomatic and discovered incidentally during radiological and clinical examinations. Osteomas are characterized with well-defined, rounded or oval radiopaque mass in the computed tomography. Herein, we report a rare case of peripheral osteoma of the lower part of the mandible in a 19-year-old female with radiologic and pathologic findings.
  3,816 291 1
Concomitant occurrence of infected cemento-osseous dysplasia and radicular cyst in young Indian female: An unusual case report
Pasha Zameer, AN Sulabha, Sameer Choudhari
May-August 2013, 1(2):75-79
Cemento-osseous dysplasia is a non-neoplastic process usually confined to the tooth bearing areas of jaws or edentulous alveolar process. Cemento-osseous dysplasias are categorized into three types on basis of the clinical and radiographic features: Periapical, focal and florid. Focal cemento-osseous dysplasia is benign fibrous osseous condition that can be seen in dentulous and edentulous patient. The lesion is detected only on radiographic examination with variation comprising a combination of radiolucent and radiopaque pattern. It is asymptomatic and needs no treatment. We report an unusual case of concomitant occurrence of infected focal cemento-osseous dysplasia in mandible with atypical clinical presentation of two sinus openings and a radicular cyst in maxilla.
  3,916 181 -
Ultrasonographic evaluation of fascial space infections of odontogenic origin
Mohit Sharma, Kathikeya Patil, Mahima V Guledgud
January-April 2014, 2(1):8-14
Introduction: Dental infection has plagued the human kind for as long as our species has existed. It is often difficult to diagnose the stage of infection. The relative blind surgical incision and drainage performed in such situations usually results in excessive harm through unnecessary extensive incisions, and failure to locate and evacuate the abscess cavity completely. The potential use of ultrasonography (USG) in fascial space infections of odontogenic origin has not been explored completely and deserves much more intensive, high quality research. Objectives: (1) To elucidate the role of USG as an adjunctive diagnostic aid for fascial space infections of odontogenic origin. (2) To aid in appropriate treatment planning and management of fascial space infections of odontogenic origin. Materials and Methods: The study group comprised of 30 patients of either genders, irrespective of age and presented with unilateral fascial space infection of odontogenic origin. After the clinical and radiographic examinations, patients underwent USG evaluation. USG-guided intraoperative aspiration was done to confirm the diagnosis. All the findings were tabulated and subjected to statistical analysis. Results: USG was as accurate as USG-guided intraoral aspiration (Gold standard) in diagnosing fascial space infections of odontogenic origin with sensitivity and specificity of 100%. In cases of abscess USG showed a well-defined homogenous anechoic pattern, cellulitis cases showed an ill-defined heterogeneous hyperechoic pattern while edema showed an ill-defined isoechoic pattern. Conclusion: The different stages of fascial space infections of odontogenic origin can be clearly depicted on the USG. USG can be used as a reliable adjunctive imaging technique in the diagnosis of fascial space infection of odontogenic origin and thus aids in appropriate treatment planning and management of such cases.
  3,574 486 -
Trifid mandibular nerve canal
Mehmet Z Adisen, Melda Misirlioglu, Selmi Yilmaz
May-August 2013, 1(2):67-69
The location and configuration of the mandibular canal are important in surgical procedures involving the mandible. Bifid mandibular canal (BMC) and trifid mandibular canal (TMC) are variations of the normal anatomy. In the literature, occurrence of TMC is much rarer than BMC that only a few cases have been reported. These variations can be detected on a panoramic radiograph however more precise information about the course of the mandibular canal can be revealed on cross-sectional tomographic images. This paper presents a rare case of TMC evaluated by panoramic radiograph and CBCT. The main purpose of this case report is to pay attention to an apparently harmful anomaly, which can induce complications while surgical procedures.
  3,674 314 -
Compliance of Indian dentists with oral radiology safety measures
Swarna Yerebairapura Math, Devarasa Giriyapura Murugeshappa, Rajeshwari Annigeri, Dheeraj Kalra
September-December 2013, 1(3):104-110
Objectives: The aim of this study was to determine the dentist's knowledge and practice about dose reduction techniques, radiographic equipment and quality of dental radiographic service among private dental practitioners in Davangere City, India. Materials and Methods: The survey was performed on 80 dental practitioners from Davangere City, India. Information on the demographic characteristics of the dentists, radiographic equipment, techniques and processing they used and radiation protection was obtained with a 40 point questionnaire. Results: The study yielded a response rate of 90%. The respondents' knowledge concerning the technical details of their equipment was limited, with 27.7% not knowing kVp settings of their equipment. Only 11% and 5% respondents reported having long and rectangular collimators respectively. Regarding the film speed 16.6% dental practitioners were unaware about it. The most preferred technique (81%) for periapical radiography was the bisecting angle technique. Lead aprons were worn more often by female dentists. None of the dental practitioners had thyroid collars. The distance of the dentist to the radiation tube during exposure was on average 2.2 m, although 13% of the dentists assisted in holding the image receptor inside the patient's mouth. Only 4% of the dental practitioners reported that they used automatic processor. About 40% of the dental practitioners used film badges. Conclusions: In the present study, the results indicate that for minimizing any unnecessary radiation, attempts should be made to improve dentists' knowledge about radiation dose reduction techniques. Some dose-reducing strategies are commonly used in Davangere Dental clinics, whereas others have not gained wide acceptance.
  3,458 512 1
Evaluation of diagnostically difficult impacted maxillary canines in orthodontic patients and its effect on the root of adjacent teeth using cone beam computed tomography
Zahra Dalili Kajan, Ali Khalighi Sigaroudi, Navid Karimi Nasab, Zhaleh Shafiee, Somayeh Nemati
January-April 2014, 2(1):2-7
Purpose: To evaluate the morphology of apical portion of impacted maxillary canines and their effects on root resorption of adjacent teeth as well as their locations and inclinations with cone beam computed tomography (CBCT) in an individual group of orthodontic patients. Materials and Methods: In this descriptive cross-sectional study, 71 diagnostically difficult impacted canines of 55 orthodontic patients were studied with CBCT images. In this group, the orthodontic treatment approaches for eruption of their impacted teeth were not successful. A radiologist opined about the angulation, the position of apical and coronal portion of maxillary canine tooth, resorption of adjacent teeth as well as existence of apical hook and root curvature in reconstructed images. The simultaneous existence of hook and root resorption with other data was subjected to statistical analysis by Chi-square and Fisher's Exact tests. Results: In this cross-sectional study, the position of crown in buccopalatal dimension were respectively 16.9, 73.2 and 9.9% in buccal, palatal and middle portion of the alveolar bone. Apical hook was seen in 28.2% of cases. Root resorption of the adjacent teeth was induced in 32.3% of the cases, 69.6% of which were slight. Overall, there were no significant statistical differences between the presence of hook, and the positions and angulations of impacted teeth. Conclusions: Apical and palatal positions of crowns of the impacted maxillary canines were the most common locations in the selected groups. The possibility of root resorption of adjacent teeth could be related to angulation of impacted tooth.
  3,334 489 1