Cone beam computed tomographic comparison of infrazygomatic crest bone thickness in patients with different facial types

Introduction: The use of mini-implants has become common in orthodontic practice as it has increased the possibility of skeletal anchorage. The palate constitutes a site of choice for the insertion of miniscrews purposes because it is a site with relatively safety with appropriate bone thickness and less suitability for inflammation. Aim: To quantitatively evaluate the thickness of the palatal bone for miniscrews insertion. Material and Methods: Forty-seven sets of cone beam computed tomographic (CBCT) images were selected. The sample consisted of cone beam computed tomography from 47 patients (20 male, 27 female; mean age 22.4 years old/± 3.01 years). Palatal bone thickness (PBT) was measured in millimeters (mm) with 5 regions of interest (ROIs) which were determined used the coronal reconstructions of the patatal area: 4, 6, 8 and 10 mm posterior to the incisive foramen were evaluated. A total of 940 ROIs were evaluated. RESULTS: Significant differences were observed for PBT between various palatal sections (p<.01). The thickest area (6.31-7.03 mm) was found in the anterior part of the palate. The mean bone thicknesses in the 6, 8 and 10 mm sections were significantly less than those observed at 4 mm from the incisive foramen. Conclusions: The thickness of the palatal bone is progressively thinner from the palatine foramen to the posterior region. Transversally, the bone was thicker in the palatine suture than in paramedian areas, mainly in the coronal reconstructions located more laterally.

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Upper Incisor Position and Bony Support in Untreated Patients as Seen on CBCT

The Angle Orthodontist ◽

10.2319/081908-437.1 ◽

2009 ◽

Vol 79 (4) ◽

pp. 692-702 ◽

Cited By ~ 28

Author(s):

Antonio Gracco ◽

Luca Lombardo ◽

Giulia Mancuso ◽

Vincenzo Gravina ◽

Giuseppe Siciliani

Keyword(s):

Computed Tomography ◽

Null Hypothesis ◽

Alveolar Bone ◽

Root Apex ◽

Cone Beam ◽

Bone Thickness ◽

Face Type ◽

Upper Jaw ◽

Facial Types ◽

Facial Type

Abstract Objective: To test the null hypothesis that there are no correlations between the morphology of the upper jaw, the position of the upper incisors, and facial type. Materials and Methods: From a sample of 191 patients, the FMA angle was used to select 20 short face type, 20 norm face type, and 20 long face type patients, aged 12 to 40 years. Using cone-beam computed tomography (CBCT), tomography was carried out on sagittal sections corresponding to the four upper incisors. Some parameters defining the dentoskeletal relationships, the alveolar thickness, the alveolar height, and the dental movement were measured. The measurements were processed using analysis of variance and Tukey's test. Results: At the upper central incisors, short face type patients presented a greater alveolar bone thickness than long face type patients. In short face type and norm face type subjects the root apex of the upper incisors was farther away from the lingual cortex than in the long face type patients. At the central incisors the alveolar thickness was greater and the lingual cortex was higher with respect to the lateral incisors in all three facial types. Conclusion: At the upper incisors, facial type is statistically significantly correlated with both alveolar bone thickness and distance between the root apex and lingual cortex.

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A Cone-Beam Computed Tomographic Study of Alveolar Bone Morphology in Patients With Unilateral Cleft Lip and Palate

The Cleft Palate-Craniofacial Journal ◽

10.1177/1055665619874613 ◽

2019 ◽

Vol 57 (3) ◽

pp. 273-281

Author(s):

Najmeh Movahhedian ◽

Mehrdad Vossoughi ◽

Mahtab Hajati-Sisakht

Keyword(s):

Computed Tomography ◽

Cleft Lip ◽

Cleft Lip And Palate ◽

Alveolar Bone ◽

Cone Beam ◽

Bone Thickness ◽

Bone Morphology ◽

Computed Tomographic ◽

Control Side ◽

Bone Height

Objective: To evaluate the bony support around the teeth adjacent to the unilateral cleft lip and palate (ULCLP) using cone-beam computed tomography. Methods and Materials: Cone-beam computed tomographies of 48 cleft-adjacent teeth (28 anterior and 20 posterior to the cleft) and 48 noncleft control teeth were evaluated. The alveolar bone thickness at 3 and 6 mm apical to the cement–enamel junction (CEJ), the distance between the alveolar crest and CEJ (Alv-CEJ), and the presence of fenestration were assessed in buccal, palatal, and proximal surfaces. Results: The alveolar bone on the buccal and palatal sides of the teeth anterior to the cleft was significantly thinner than the noncleft teeth (all P < .05). The Alv-CEJ was significantly greater on the buccal and distal surfaces of the teeth anterior to the cleft ( P < .001 and P = .010, respectively) and on the palatal and mesial surfaces of the teeth posterior to the cleft ( P = .024 and P = .003, respectively) when compared to the noncleft teeth. The frequency of reduced alveolar bone height (>2 mm) was higher than noncleft side for buccal and distal sides of the teeth anterior to the cleft ( P = .016 and .006, respectively) and the buccal and mesial sides of the teeth posterior to the cleft ( P = .008 and <.001, respectively). The teeth anterior to the cleft had a higher prevalence of fenestration ( P = .004). Conclusion: Reduced alveolar bone height is more common in the cleft side compared to the control side. The teeth anterior to the ULCLP have thinner alveolar bone support and higher frequency of fenestration.

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Cortical bone thickness of the alveolar process measured with cone-beam computed tomography in patients with different facial types

American Journal of Orthodontics and Dentofacial Orthopedics ◽

10.1016/j.ajodo.2012.09.013 ◽

2013 ◽

Vol 143 (2) ◽

pp. 190-196 ◽

Cited By ~ 57

Author(s):

Fulya Ozdemir ◽

Murat Tozlu ◽

Derya Germec-Cakan

Keyword(s):

Computed Tomography ◽

Cortical Bone ◽

Cone Beam Computed Tomography ◽

Cone Beam ◽

Alveolar Process ◽

Bone Thickness ◽

Cortical Bone Thickness ◽

Facial Types

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Palatal Bone Thickness of MSE Implantation area in Adult Patients with Skeletal Class Ⅲ Malocclusion: A Cone-beam Computed Tomographic Study

10.21203/rs.3.rs-137676/v1 ◽

2021 ◽

Author(s):

Weiting Chen ◽

Kaili Zhang ◽

Dongxu Liu

Keyword(s):

Inferior Turbinate ◽

Adult Patients ◽

Cone Beam ◽

Bone Thickness ◽

Female Ratio ◽

Skeletal Class ◽

Computed Tomographic ◽

Significant Difference ◽

The Difference ◽

Palatal Bone

Abstract Background: Analyze the palatal bone thickness of maxillary skeletal expander (MSE) implantation area in adult patients with skeletal class Ⅲ malocclusion based on Cone-beam computed tomography (CBCT) data, and to provide a reference for the implantation of the miniscrew.Methods: A total of 80 adult patients (40 M, 40 F) with an normal angle before treatment were divided into two groups; skeletal class Ⅲ malocclusion group and skeletal Ⅰ malocclusion group according to sagittal facial type, with 40 patients in each group, with a male to female ratio of 1: 1. CBCT scanner was used to obtain DICOM data from all patients.The palatal bone thickness was measured at 45 sites with MIMICS 21.0 and SPSS 22.0 was employed for statistical analysis. The bone thickness of different regions of the palate in the same group was analyzed by one-way analysis of variance (ANOVA) method; Fisher’s least significant difference (LSD)-t method was used for comparison in pairs, and an independent sample t-test was employed to test the difference of bone thickness in the same area between the two groups.Results: (1) There was no significant difference among the anterior, middle, and posterior regions of the midline area in patients with skeletal class Ⅲ malocclusion (P > 0.05). Palatal bone thickness decreased gradually from front to back in the middle and lateral areas in both groups (P < 0.001). (2) The bone thickness of the anterior, middle, and posterior regions of the two groups gradually decreased from the middle area to the parapalatine region. (3) The palatal bone were significant thinner in the area 9.0 mm before the transverse palatine suture in midline area, 9.0 mm before and after the transverse palatine suture in the middle area, and 9.0 mm after the transverse palatine suture in the lateral area.Conclusion: (1) The palatal bone of patients with class Ⅲ malocclusion was thinner in some areas, so the MSE implant anchorage position could be moved forward appropriately. (2) The thin palatal bone increased the risk of MSE anchorage screw penetrating nasal mucosa and even inferior turbinate. Patients should be given a more precise and personalized implantation scheme based on factors such as palatine bone thickness and palatal morphology.

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PREDICTABILITY OF PRIMARY IMPLANT STABILITY FROM CORTICAL BONE THICKNESS AND BONE DENSITY VALUES OF CONE BEAM COMPUTED TOMOGRAPHIC SCANS: A CROSS SECTIONAL STUDY

Egyptian Dental Journal ◽

10.21608/edj.2017.75022 ◽

2017 ◽

Vol 63 (1) ◽

pp. 739-746

Author(s):

Iman Radi ◽

Nouran Abdel-Nabi

Keyword(s):

Bone Density ◽

Cortical Bone ◽

Cross Sectional Study ◽

Cone Beam ◽

Sectional Study ◽

Implant Stability ◽

Bone Thickness ◽

Cross Sectional ◽

Computed Tomographic ◽

Density Values

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Evaluation of maxillary buccal alveolar bone before and after orthodontic alignment without extractions: A cone beam computed tomographic study

The Angle Orthodontist ◽

10.2319/101117-686.1 ◽

2018 ◽

Vol 88 (6) ◽

pp. 748-756 ◽

Cited By ~ 8

Author(s):

Juliana F. Morais ◽

Birte Melsen ◽

Karina M. S. de Freitas ◽

Nuria Castello Branco ◽

Daniela G. Garib ◽

...

Keyword(s):

Risk Factors ◽

Bone Loss ◽

Alveolar Bone ◽

Cone Beam ◽

Bone Thickness ◽

Computed Tomographic ◽

Alveolar Crest ◽

Before And After ◽

Bone Changes

ABSTRACT Objectives: To assess the changes in the maxillary buccal alveolar bone during alignment without extractions. Secondarily, to evaluate the changes in arch dimensions and buccolingual inclinations of teeth and to identify risk factors for bone loss. Materials and Methods: Twenty-two adolescents with crowded permanent dentitions were treated without extractions with Damon 3MX brackets. Cone beam computed tomographic scans were taken before treatment (T0) and after alignment (T1). Bone thickness (BT) and height from the cementoenamel junction to the alveolar crest (BH) were evaluated at the maxillary central incisors, second premolars, and buccal roots of first molars. Changes in all variables from T0 to T1 were assessed. Correlations between bone changes and initial bone thickness, initial arch widths, initial crowding, amount of expansion, amount of tipping, and amount of molar rotation were calculated. Results: BT decreased and BH increased significantly for the incisors and mesiobuccal root of the first molars. Arch dimensions generally increased together with tipping. Bone loss was correlated with crowding and amount of expansion in the premolar region. Initially thinner BT was correlated with greater apical migration of bone for the incisors. Conclusions: Nonextraction alignment with self-ligating brackets led to arch expansion associated with tipping of teeth. Expansion related to alignment resulted in horizontal and vertical bone loss at the incisors and mesiobuccal root of the first molars. Thinner BTs and more severe crowding before treatment increased the risk for buccal bone loss.

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