Zygomatic-maxillary cortical bone thickness in hyper, normo and hypodivergent patients

ABSTRACT Objective: The aim of this study was to evaluate the thickness of the zygomatic-maxillary cortical bone using computed tomography in different skeletal patterns. Methods: A total of 54 patients of both sexes, divided into three groups according to the vertical skeletal pattern, were evaluated for cortical bone thickness of the anterior slope of the zygomatic process of the maxilla, using cone beam computed tomography. Measurements were made at 2mm, 4mm, 6mm, 8mm and 10mm above from first molar mesial root apex. Vertical skeletal pattern was determined by Frankfurt mandibular angle (FMA). Results: The hyperdivergent pattern had the lowest cortical thickness value, nevertheless, no patient in the hyperdivergent group presented cortical thickness exceeding 2mm, and no patient in the hypodivergent group presented cortical thickness less than 1mm. However, the correlation between cortical thickness and mandibular plane angle was weak and not significant. Conclusion: Although higher prevalence of thick cortical was observed in the hypodivergent patients, and thin cortical groups in the hyperdivergent group, the vertical skeletal pattern could not be used as determinant of the zygomatic-maxillary cortical thickness.

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Detection and measurements of apical lesions in the upper jaw by cone beam computed tomography and panoramic radiography as a function of cortical bone thickness

Clinical Oral Investigations ◽

10.1007/s00784-019-02843-x ◽

2019 ◽

Vol 23 (11) ◽

pp. 4067-4073

Author(s):

Ali-Reza Ketabi ◽

Sandra Ketabi ◽

Mohamed Badis Nabli ◽

Hans-Christoph Lauer ◽

Martin Brenner

Keyword(s):

Computed Tomography ◽

Cortical Bone ◽

Cone Beam Computed Tomography ◽

Panoramic Radiography ◽

Cone Beam ◽

Bone Thickness ◽

Cortical Bone Thickness ◽

Upper Jaw ◽

Apical Lesions

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Determination of Buccal Cortical Bone Thickness for Mini-Screws Placement in Horizontal Growth Type Patients by Cone Beam Computed Tomography

Journal of Dental Health Oral Disorders and Therapy ◽

10.15406/jdhodt.2015.02.00073 ◽

2015 ◽

Vol 2 (6) ◽

Cited By ~ 1

Author(s):

Salma Khairy

Keyword(s):

Computed Tomography ◽

Cortical Bone ◽

Cone Beam Computed Tomography ◽

Cone Beam ◽

Bone Thickness ◽

Growth Type ◽

Cortical Bone Thickness ◽

Horizontal Growth

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Comparison of interradicular distances and cortical bone thickness in Thai patients with Class I and Class II skeletal patterns using cone-beam computed tomography

Imaging Science in Dentistry ◽

10.5624/isd.2016.46.2.117 ◽

2016 ◽

Vol 46 (2) ◽

pp. 117 ◽

Cited By ~ 3

Author(s):

Nattida Khumsarn ◽

Virush Patanaporn ◽

Apirum Janhom ◽

Dhirawat Jotikasthira

Keyword(s):

Computed Tomography ◽

Cortical Bone ◽

Cone Beam Computed Tomography ◽

Class Ii ◽

Class I ◽

Cone Beam ◽

Bone Thickness ◽

Cortical Bone Thickness

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Comparative Evaluation of Cortical Bone Anatomy of Mandibular Buccal Shelf for Mini Implant Placement in Different Facial Divergence: A Cone Beam Computed Tomography Study

The Journal of Indian Orthodontic Society ◽

10.1177/0301574220932265 ◽

2020 ◽

Vol 54 (4) ◽

pp. 325-331

Author(s):

Kalyani Trivedi ◽

Bharvi K Jani ◽

Sagar Hirani ◽

Mansi V Radia

Keyword(s):

Computed Tomography ◽

Cortical Bone ◽

Cone Beam Computed Tomography ◽

Cone Beam ◽

Bone Surface ◽

Bone Thickness ◽

Second Molar ◽

Cortical Bone Thickness ◽

Implant Placement ◽

Alveolar Crest

Aim: The purpose of this study was to use measurements from cone beam computed tomography scans to quantify the cortical bone thickness of mandibular buccal shelf region and preferable site for buccal shelf implant placement in 10 hyperdivergent and 10 hypodivergent patients. Method: 20 cone beam computed tomographies were equally divided based on divergence. 6 sites were examined: mesial of first molar (6M), middle of first molar (6Mi), interdental between the first and second molar (Id), mesial of second molar (7M), middle of second molar (7Mi), and distal of second molar (7D). The study quantified the mandibular buccal shelf relative to its angle of slope, the cortical bone thickness measured perpendicular to the bone surface, the amount of cortical bone 30° angle to the bone surface. The cortical bone thickness was measured perpendicular and at a 30° angle at 3, 5, and 7 mm from the alveolar crest. Result: Significant change is seen at the buccal shelf slope at 6M ( P = .001) and further increase in this angle till 7D ( P = .003). Mean amount of cortical bone for hyperdivergent group at 7D is 4.77 ± 0.68 mm and for hypodivergent group is 3.86 ± 0.70 mm. Statistically significant differences were noted at insertion site at 90° and 30° for both groups at 3, 5, and 7 mm from the alveolar crest. Conclusion: Preferable site for buccal shelf implant placement is distal to the mandibular second molar. The maximum amount of cortical bone is found distal to the second molar 7 mm vertically from alveolar crest when the buccal shelf implant is placed at 30° angulation for hyperdivergent group.

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