scholarly journals Overview of Radiological Studies on Visualization of Gubernaculum Tracts of Permanent Teeth

2021 ◽  
Vol 10 (14) ◽  
pp. 3051
Author(s):  
Masafumi Oda ◽  
Ikuko Nishida ◽  
Manabu Habu ◽  
Osamu Takahashi ◽  
Hiroki Tsurushima ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Tooth Eruption ◽  
Present Review ◽  
Cone Beam ◽  
Permanent Teeth ◽  
Dental Follicle ◽  
Imaging Characteristics ◽  
Radiological Studies ◽  
Multi Detector Computed Tomography

The eruption pathway from the dental follicle to the gingiva for permanent teeth is known as the gubernaculum tract (GT), a physiologic structure thought to play a role in tooth eruption. Cone beam computed tomography and multi-detector computed tomography have recently been used to visualize the GT, with the results indicating that this structure might be related to the normal eruption of teeth. By contrast, curved and/or constricted GTs may lead to abnormal tooth eruption. In addition, complex odontomas have been reported from within the GT or dental sac of unerupted permanent teeth. If an odontoma occurs within the GT, the tooth will not erupt normally. Moreover, the imaging characteristics of the GT from the top of the odontogenic mass to the alveolar crest are extremely useful for making a differential pathological diagnosis and for differentiating between odontogenic and non-odontogenic masses. Therefore, radiological studies on the GT have been attracting increasing attention. Given this background, the present review aims to clarify the imaging characteristics and review recent studies on the GT considering the importance of the research.

Imaging Characteristics of Odontogenic Cysts and Tumours: a Retrospective Cone Beam Computed Tomography Study

2022 ◽  
Vol 4 (1) ◽  
Author(s):  
Mailon Cury Carneiro ◽  
Elen de Souza Tolentino ◽  
Lorena Borgognoni Aquaroni ◽  
Milenka Gabriela Quenta Huayhua ◽  
Bernardo da Fonseca Orcina ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Cone Beam ◽  
Odontogenic Cysts ◽  
Imaging Characteristics

Ionizing radiation and its considerations in imaging diagnosis: comparison of absorbed dose between cone beam computed tomography and multi-detector computed tomography in the head and neck

2021 ◽  
Author(s):  
P.L.E. Oliveira ◽  
C.R. Starling ◽  
C.L.P. Maurício ◽  
F.R. Guedes ◽  
M.A. Visconti ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Head And Neck ◽  
Cone Beam Computed Tomography ◽  
Absorbed Dose ◽  
Cone Beam ◽  
Thermoluminescent Dosimeters ◽  
Organ Tissue ◽  
The Mean ◽  
Average Adult ◽  
Multi Detector Computed Tomography

Introduction: The objective of this study was to compare the mean absorbed dose in patients undergoing head and neck examinations using two cone beam computed tomography (CBCT, Kodak and i-CAT) and one multi-detector computed tomography (MDCT). Methods: Three thermoluminescent dosimeters (TLDs), calibrated in air kerma, were positioned in 24 regions of the head and neck of a phantom simulating an average adult. The mean absorbed dose (mGy) values in these positions, for different organs and tissues, were obtained using correction factors, considering the ratio between the mass energy absorption coefficients of organ/tissue and air. Comparison between radiation doses in the most radiosensitive regions was done by calculating the ratio of these dose values, with propagated uncertainty. Results: The dose in all regions was significantly higher for MDCT when compared to CBCT. Concerning CBCT equipment, the Kodak device had a higher absorbed dose than the i-CAT for most of the regions tested. The uncertainty of the i-CAT was greater than that of the Kodak. Conclusion: Due to the considerable difference between absorbed doses, emphasizing the higher dose values obtained in MDCT, the dissemination of CBCT application in medicine is recommended, as well as further studies to broaden the criteria for use.

scholarly journals Assessment of dehiscence and fenestration in children and adolescents using cone beam computed tomography

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Aslıhan Akbulut ◽  
Beyza Ballı Akgöl ◽  
Kaan Orhan ◽  
Merve Bayram
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Primary Teeth ◽  
Three Dimensions ◽  
Cone Beam ◽  
Permanent Teeth ◽  
Type I ◽  
Chi Square ◽  
Children And Adolescent ◽  
Adolescent Patients

Objectives: To define the prevalence of dehiscence and fenestration and classify them in terms of the localization of fenestrations in a random sampled group of children and adolescent patients using cone-beam computed tomography (CBCT).Methods:  CBCT performed at the Department of Oral and Maxillofacial Radiology of patients referred by the paediatric dentistry clinic were included in this retrospective study. Image evaluations were performed by dentomaxillofacial radiologist (AA, asst. prof.), and these images were examined in three dimensions of the axial, coronal, and sagittal planes. Intraexaminer agreement for the evaluations were found acceptable. The presence/absence of dehiscence and/or fenestration, fenestration’s classification type, and localization of defects were recorded. Moreover, the presence/absence of periapical lesion in related root with dehiscence and fenestration was noted. For statistical analysis, The Chi-Square test, Fisher Freeman Halton Test, and Yates' Continuity of Correction were used.Results: 3061 roots in 1801 teeth of 120 cases were analyzed. The mean age was 9.97±2.22 years. Dehiscence was detected in 261(8.5%) roots of 161(8.9%) teeth, and fenestration was detected 63(2%) roots of 36(2%) teeth. The most common fenestration type was Type I, followed by Type II and IV. Dehiscence was observed more frequently in primary teeth than permanent teeth, and the difference was statistically significant (p:0.000). Dehiscence and fenestration incidence in maxillary teeth was significantly higher than in the mandibular teeth (pdehiscence:0.000, pfenestration:0.004). Apical lesions were observed more in primary teeth than permanent teeth for both defects.Conclusions: This study concludes that alveolar dehiscence and fenestrations are more common in primary teeth than permanent teeth. Moreover, these defects were detected more for the teeth in the maxilla. Concerning endodontic and orthodontic therapies in maxilla, use of CBCT is useful in determining the region's anatomical structure accurately in suspected cases of child and adolescent patients.

scholarly journals Root surface areas of maxillary permanent teeth in anterior normal overbite and anterior open bite assessed using cone-beam computed tomography

2017 ◽  
Vol 47 (4) ◽  
pp. 241 ◽  
Author(s):  
Piyadanai Suteerapongpun ◽  
Supassara Sirabanchongkran ◽  
Tanapan Wattanachai ◽  
Patiyut Sriwilas ◽  
Dhirawat Jotikasthira
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Root Surface ◽  
Open Bite ◽  
Cone Beam ◽  
Permanent Teeth ◽  
Anterior Open Bite ◽  
Surface Areas

scholarly journals The Relationship between Dental Follicle Width and Maxillary Impacted Canines’ Descriptive and Resorptive Features Using Cone-Beam Computed Tomography

2017 ◽  
Vol 2017 ◽  
pp. 1-5 ◽  
Author(s):  
İlhan Metin Dağsuyu ◽  
Rıdvan Okşayan ◽  
Fatih Kahraman ◽  
Mehmet Aydın ◽  
İbrahim Şevki Bayrakdar ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Root Resorption ◽  
Three Dimensional ◽  
Cone Beam ◽  
Dental Follicle ◽  
Impacted Canines ◽  
Impacted Canine ◽  
The Relationship ◽  
Maxillary Impacted Canine

Objectives. To assess the relationship between dental follicle width and maxillary impacted canines’ descriptive and resorptive features with three-dimensional (3D) cone-beam computed tomography (CBCT). Methods. The study comprised 102 patients with cone-beam computed tomography 3D images and a total of 140 impacted canines. The association between maxillary impacted canine dental follicle width and the variables of gender, impaction side (right and left), localization of impacted canine (buccal, central, and palatal), and resorption of the adjacent laterals was compared. Measurements were analyzed with Student’s t-test, Kruskal-Wallis test, and Mann–Whitney U statistical test. Results. According to gender, no statistically significant differences were found in the follicle size of the maxillary impacted canine between males and females (p>0.05). Widths of the follicles were determined for the right and left impaction sides, and no statistically significant relation was found (p>0.05). There were statistically significant differences between root resorption degrees of lateral incisors and maxillary impacted canine follicle width (p<0.05). Statistically significant higher follicle width values were present in degree 2 (mild) resorption than in degree 1 (no) and degree 3 (moderate) resorption samples (p<0.05). Conclusions. No significant correlation was found between follicle width and the variables of gender, impaction side, and localization of maxillary impacted canines. Our study could not confirm that increased dental follicle width of the maxillary impacted canines exhibited more resorption risk for the adjacent lateral incisors.

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