A Randomized Clinical Trial to Evaluate Labial Alveolar Bone Thickness and Apical Root Resorption between Two Types of Brackets Using Cone - Beam Computed Tomography

Introduction: The maxillary anterior region is becoming a major concern due to its aesthetic relevance. The buccal bone thickness is important for implant placement, orthodontic treatment and restorative treatment. Objective: To assess the thickness of alveolar bone in the maxillary central incisor using cone beam computed tomography (CBCT). Methods: A cross-sectional observational study was conducted at Department of Dental Surgery, Bir Hospital where CBCT of 53 samples from July 2019 till December 2019, the archived CBCT images was assessed retrospectively. The thickness of the labial bone in a direction perpendicular to the outer surface of the tooth root was measured at a distance of 2 mm from the cementoenamel junction (CEJ). The measurement was taken thrice and the mean measurement was considered. Results: The labial alveolar bone thickness in maxillary central incisor was found to be 0.55±0.27 mm at a distance of 2 mm from the CEJ. Only 2 (3.8%) of the samples had an alveolar thickness of >1 mm. No statistically significant difference was found with respect to gender and age. Conclusion: The average thickness of the labial alveolar bone in maxillary central incisor using cone beam computed tomography was found to be thin.

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In vivo detection of external apical root resorption induced by apical periodontitis using periapical radiography and cone-beam computed tomography

10.21203/rs.3.rs-173059/v1 ◽

2021 ◽

Author(s):

Stephanie Diaz Huamán ◽

Maya Fernanda Manfrin Arnez ◽

Fernanda Maria Machado Pereira Cabral de Oliveira ◽

Andiara De Rossi ◽

Léa Assed Bezerra Silva ◽

...

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Predictive Value ◽

Root Resorption ◽

Calculated Data ◽

Cone Beam ◽

Predictive Values ◽

Apical Root Resorption ◽

External Apical Root Resorption ◽

Sensitivity Specificity

Abstract Objectives: To investigate sensitivity, specificity, predictive values and accuracy of periapical radiography (PR) and Cone beam computed tomography (CBCT) for detection of external apical root resorption (EARR).Materials and Methods: Dog’s teeth with experimentally induced root resorption underwent or not root canal treatment (n = 62 roots). True positives (TP), false positives (FP), true negatives (TN) and false negatives (FN) in PR and CBCT diagnoses were determined using histopathologic findings as gold standard. Sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV) and diagnostic accuracy (TP + TN) in the diagnosis of EARR were calculated. Data was compared using chi-squared test (⍺= 0.05).Results: We found that PR detected EARR in 35% of roots and CBCT, in 47%. EARR was microscopically diagnosed in 50% (p = 0.03 comparison between PR and microscopy; p = 0.67 comparison between CBCT and microscopy). Overall, CBCT produced more accurate diagnoses than PR (0.93 for CBCT versus 0.70 for PR; p = 0.008). Interestingly, when data was stratified into small and large resorptions, PR and CBCT allowed identification of large resorption in 100% of the cases and showed the same accuracy. However, for small resorptions, PR showed an accuracy of 0.83, whereas CBCT showed an accuracy of 0.96 (p = 0.003).Conclusions: We demonstrated that CBCT showed higher accuracy to detect EARR. These findings shed light on the use of CBCT for detection of initial root resorption.Clinical relevance: Early identification of resorption allows a prompt treatment and reduces the risk of dental structure loss.

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Evaluation of alveolar bone support around incisors in patients with unilateral cleft lip, alveolus, and palate in late mixed dentition using cone beam computed tomography

The Angle Orthodontist ◽

10.2319/071517-472.1 ◽

2018 ◽

Vol 88 (3) ◽

pp. 299-305 ◽

Cited By ~ 3

Author(s):

Yingdan Pan ◽

Yunting Zeng ◽

Zeyu Zhang ◽

Yiqin Liu ◽

Yi Jing ◽

...

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Cleft Lip ◽

Alveolar Bone ◽

Mixed Dentition ◽

Cone Beam ◽

Bone Thickness ◽

Computed Tomography Scans ◽

Tooth Inclination ◽

Bone Height

ABSTRACT Objectives: To evaluate alveolar bone support around cleft-adjacent maxillary central incisors (U1) in patients with unilateral cleft lip, alveolus and palate (UCLAP) in the late mixed dentition and to investigate the correlation between the alveolar bone thickness (ABT) and tooth inclination. Materials and Methods: Cone beam computed tomography scans of 45 subjects with UCLAP (29 boys, 16 girls; mean age = 10.74 ± 1.08 years) were assessed. The distance between the cementoenamel junction (CEJ) and alveolar bone crest (AC), and the ABTs at 3 mm, 6 mm, and the apex were measured on the labial, lingual and distal surfaces of U1. The cleft and normal sides were compared using a paired t-test and Pearson's χ2 test. Pearson's correlation was used to explore the association between the ABT and tooth inclination of cleft-adjacent U1 in the labiolingual and mesiodistal dimensions. Results: The CEJ-AC distances were significantly greater in cleft-adjacent U1 (P < .01), with more bone height reduction observed labially and distally (P < .001). The labial, lingual, and apico-distal ABTs were decreased on the cleft side (P < .01). A positive correlation was found between the apico-labial ABT and the labiolingual inclination (r = 0.568, P < .01). Conclusions: Patients with UCLAP have reduced alveolar bone support around the cleft-adjacent U1, and the apico-labial ABT tends to decrease with increasing lingual tooth inclination; however, the correlation was weak.

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