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

2021 ◽  
Vol 26 (1) ◽  
Author(s):  
Julyano Vieira da COSTA ◽  
Adilson L. RAMOS ◽  
Liogi IWAKI FILHO

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.

2020 ◽  
Vol 54 (4) ◽  
pp. 325-331
Author(s):  
Kalyani Trivedi ◽  
Bharvi K Jani ◽  
Sagar Hirani ◽  
Mansi V Radia

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.


2017 ◽  
Vol 123 (6) ◽  
pp. 707-713 ◽  
Author(s):  
Monikelly do Carmo Chagas Nascimento ◽  
Solange Maria de Almeida Boscolo ◽  
Francisco Haiter-Neto ◽  
Emanuela Carla dos Santos ◽  
Ivo Lambrichts ◽  
...  

Odontology ◽  
2020 ◽  
Vol 108 (4) ◽  
pp. 669-675 ◽  
Author(s):  
Antonino Lo Giudice ◽  
Lorenzo Rustico ◽  
Alberto Caprioglio ◽  
Marco Migliorati ◽  
Riccardo Nucera

2017 ◽  
Vol 23 ◽  
pp. 5812-5817 ◽  
Author(s):  
Ozkan Adiguzel ◽  
Ceren Aktuna Belgin ◽  
Seda Falakaloglu ◽  
Suzan Cangul ◽  
Zeki Akkus

2014 ◽  
Vol 2 (2) ◽  
pp. 64-72
Author(s):  
Seyed Hossein Moslemzade ◽  
Yusef Kananizadeh ◽  
Amin Nourizadeh ◽  
Aydin Sohrabi ◽  
Mehrdad Panjnoosh ◽  
...  

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