scholarly journals Tridimensional assessment of the dental follicle dimensions of impacted mandibular third molars using cone-beam CT

2018 ◽  
pp. 0-0
Author(s):  
M Barroso ◽  
LE Arriola-Guillen ◽  
YA Rodriguez-Cardenas ◽  
GA Ruiz-Mora ◽  
ME Guerrero ◽  
...  
Keyword(s):  
Cone Beam Ct ◽  
Cone Beam ◽  
Dental Follicle ◽  
Third Molars ◽  
Impacted Mandibular Third Molars ◽  
Mandibular Third Molars

scholarly journals Cone Beam Computer Tomography and Histological Evaluation of Dental Follicle of Impacted Lower Third Molar Germs in Teens: A Histo-Radiographic Correlation Study in a Case Series

2021 ◽  
Vol 11 (12) ◽  
pp. 5682
Author(s):  
Giacomo D’Angeli ◽  
Francesca Zara ◽  
Alessio Belloni ◽  
Francesco Maria D’Angeli ◽  
Michele Dello Spedale Venti ◽  
...  
Keyword(s):  
Computer Tomography ◽  
Third Molar ◽  
Case Series ◽  
Cone Beam ◽  
Dental Follicle ◽  
Third Molars ◽  
Maximum Width ◽  
Impacted Mandibular Third Molars ◽  
Mandibular Third Molars ◽  
Cone Beam Computer Tomography

The dental follicle (DF) is the tissue that surrounds the crown of the developing tooth. In X-ray, images it appears as a radiolucent area. The removal of an impacted mandibular third molar is a common procedure in oral surgery. The radiographic evidence of pathology, commonly defined as a pericoronal radiolucency measuring at least mm 2.5 mm in any dimension, is accepted for the extraction of impacted mandibular third molars. Mesioangular impactions are usually more closely placed to the inferior alveolar canal, and the use of cone beam computer tomography (CBCT) before the removal of impacted mandibular third molars has been reported to be appropriate in these cases. The aim of this study was to evaluate the microscopic features of radiographically normal DFs associated with mesioangular impacted mandibular third molars examined through CBCT. Thirteen mesioangular impacted third molars from ten patients (5 males and 5 females, mean age ± SD: 15.1 ± 1.66) with a maximum width of the DF <2.5 mm, as digitally established by CBCT, were included in this study. All the DFs associated with the removed third molars were examined histologically through the analysis of different variables. The mean (±SD) and range of the maximum width of the DFs were 1.35 (±0.47) mm and 0.71–2.21 mm, respectively. Nine (69.23%) DFs showed odontogenic remnants, five (38.46%) showed focal squamous metaplasia and eight (61.53%) mild mesenchymal myxoid degeneration. The maximum width of the DF failed to show any significant correlation with all the histological variables considered in this study. Aware of the limited number of patients included in this study, the histo-radiographic correlation in our case series confirm data in the literature, according to which normal pericoronal imaging may be associated with DF tissue changes/variations that in turn are potentially associated with the development of pathologies including odontogenic cysts and tumors. Whether these changes/variations are enough to make prophylactic germectomy of impacted third molars the standard by themselves remains to be established. However, they require accurate correlations with the radiographic data for the appropriate histologic assessment of a DF.

Diagnostic accuracy of panoramic radiography, stereo-scanography and cone beam CT for assessment of mandibular third molars before surgery

2013 ◽  
Vol 71 (6) ◽  
pp. 1391-1398 ◽  
Author(s):  
Louise Hauge Matzen ◽  
Jennifer Christensen ◽  
Hanne Hintze ◽  
Søren Schou ◽  
Ann Wenzel
Keyword(s):  
Diagnostic Accuracy ◽  
Panoramic Radiography ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Third Molars ◽  
Mandibular Third Molars

scholarly journals Thickness of Buccal and Lingual Alveolar Bone Plates According to the Position of Impacted Mandibular Third Molars on Cone-Beam Computed Tomography Scans

2019 ◽  
Author(s):  
Seyed Alireza Parhiz ◽  
Pegah Bakhtiary ◽  
Farzaneh Mosavat ◽  
Mohammad Javad Kharazifard
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Alveolar Bone ◽  
Plate Thickness ◽  
Bone Plates ◽  
Cone Beam ◽  
Surgical Removal ◽  
Third Molars ◽  
Impacted Mandibular Third Molars ◽  
Mandibular Third Molars

Objectives: This study sought to assess the thickness of buccal and lingual alveolar bone plates according to the position of impacted mandibular third molars on cone-beam computed tomography (CBCT) scans. Materials and Methods: Eighty-four CBCT scans of impacted mandibular third molars were evaluated in this retrospective study. All images had been obtained by ProMax 3D CBCT system with the exposure settings of 78 kVp, 12 mA, 16 s time, 0.2 mm voxel size and 10 × 9 cm field of view. The impaction angle of teeth and the thickness of buccal and lingual cortical plates were determined on images by drawing lines in the anterior, middle, posterior, superior, central and inferior regions. Thickness of bone plates was analyzed according to the position of impacted molars relative to the buccal and lingual plates using the Student t-test and relative to the second molars using one-way ANOVA and Tukey’s test. Results: In the buccolingual direction, the buccal plate thickness was maximum in lingual position followed by central position, and minimum in buccal position of the teeth. The lingual plate thickness was minimum in horizontal and distoangular positions and maximum in the mesioangular position of impacted teeth. Conclusion: Risk of lingual plate preformation is higher in surgical removal of impacted third molars with distoangular and horizontal positions. Thus, further attention must be paid by the surgeons to such cases.

scholarly journals Comparison of panoramic radiography and cone beam CT in the assessment of juxta-apical radiolucency

2018 ◽  
Vol 47 (1) ◽  
pp. 20170198 ◽  
Author(s):  
Eduarda Helena Leandro Nascimento ◽  
Anne Caroline Costa Oenning ◽  
Bernardo Barbosa Freire ◽  
Hugo Gaêta-Araujo ◽  
Francisco Haiter-Neto ◽  
...  
Keyword(s):  
Panoramic Radiography ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Cortical Plate ◽  
Multiple Logistic Regression ◽  
Third Molars ◽  
Factors Associated ◽  
The Mean ◽  
Mandibular Third Molars ◽  
Cortical Involvement

Objectives: To compare the performance of panoramic radiography (PAN) and cone beam CT (CBCT) in the detection of juxta-apical radiolucency (JAR), as well as to investigate, in CBCT images, if there are factors associated with the detection of JAR on PAN. Methods: Two oral radiologists assessed the presence of JAR in PAN and CBCT images of 175 individuals (308 mandibular third molars). The cortical plates involvement and the JAR size and location were assessed on CBCT to evaluate if these factors were related to JAR detection on PAN. McNemar’s test and multiple logistic regression were performed. Results: PAN and CBCT differed significantly in the detection of JAR (p = 0.001). On PAN, JAR was identified on 24% of the patients while on CBCT its detection increased to 32.6%. JAR was detected only on CBCT and only on PAN in 26 and 7 cases, respectively. Distal/mesial surfaces of dental roots were where JAR was mostly located (84.5%), cortical thinning was found in 59.2% of cases and the mean (SD) of JAR size was 5.03 (±1.8) mm. However, these factors were not associated with JAR detection on PAN (p > 0.05). On the other hand, the location of the cortical involvement (if buccal or lingual) was associated with JAR detection on PAN, which was more detectable when the thinning was on buccal cortical. Conclusions: Juxta-apical radiolucency is more often detected on CBCT than on PAN. JAR detection on PAN was improved when it was related to the buccal cortical plate of the mandible.

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