Three-dimensional reconstruction of individual cervical vertebrae from cone-beam computed-tomography images

ABSTRACT Objective: To determine if the shape of the oropharyngeal airway is related to the vertical morphology of the skeletofacial complex, including the hyoid bone. Materials and Methods: Cone beam computed tomography scans from 50 pretreatment adult orthodontic records were used to obtain skeletal and airway measurements. Linear regression statistics were used to compare soft tissue variables to hard tissue predictor variables. Results: Transverse airway widening was significantly increased when the distance between the hyoid and vertebrae was reduced; when the three-dimensional (3D) facial axis angle decreased (became more vertical); when the 3D mandibular plane angle increased; when the width of the hyoid increased, or when the calculated length of the geniohyoid decreased. Conclusions: A laterally elliptical airway—found when the face is more vertical and when the hyoid is closer to the cervical vertebrae—is hypothetically more resistant to collapse. Patients with a retrognathic, skeletal deep bite and a rounded oropharynx should be identified and corrected early to prevent potential airway problems.

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Three-Dimensional Reconstruction of Computed Tomography Images with Classic Surface and Volume Rendering

Lecture Notes in Electrical Engineering - Proceedings of the 9th International Symposium on Linear Drives for Industry Applications, Volume 2 ◽

10.1007/978-3-642-40630-0_95 ◽

2013 ◽

pp. 747-752

Author(s):

Wang Wei ◽

Jian-gang Wang ◽

Hong-chun Peng

Keyword(s):

Computed Tomography ◽

Volume Rendering ◽

Three Dimensional ◽

Three Dimensional Reconstruction ◽

Computed Tomography Images ◽

Dimensional Reconstruction

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Application of Cone-Beam Computed Tomography (CBCT) in diagnosis and evaluation of Supernumerary Teeth

Janaki Medical College Journal of Medical Science ◽

10.3126/jmcjms.v5i1.17982 ◽

2017 ◽

Vol 5 (1) ◽

pp. 5-15

Author(s):

Rishikesh Pratap Sah ◽

Fusheng Dong ◽

Rahul Gupta

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Imaging System ◽

Three Dimensional ◽

Cone Beam ◽

Medical Sciences ◽

Supernumerary Teeth ◽

3 Dimensional ◽

Medical College ◽

Computed Tomography Images

Background and Objectives: The aim of this paper is to describe the application of a newly developed three-dimensional imaging system, Cone-Beam Computed Tomography in the diagnosis and evaluation of supernumerary teeth.Material and Methods: One hundred and eighty-five patients with supernumerary teeth (134 males and 51 females) were included in this study. Patients ranged in age from 6 to 38 years. Supernumerary teeth were detected by clinical examination and conventional radiographs. Moreover, careful investigation for more details was made with the cone beam computed tomography. Supernumerary teeth which were detected with the examinations of the cone beam computed tomography images were analyzed according to the number, location, shape and position.Results: Males were affected more than females in a ratio of 2.6:1. 95 % supernumerary teeth were located in maxilla and 5 % in the mandible. 71.6% of supernumerary teeth were conical in shape. 93.6% supernumerary teeth were impacted and 6.4% were erupted. A total of 198 supernumerary teeth were found to be present in palatal/lingual side and 24 were found on the buccal side. 80.5 % of the patients had one, 18.9 % had two, and 0.5 % had three supernumeraries.Conclusion: Detailed examinations and evaluations of these teeth with Cone-Beam Computed tomography (CBCT) yields accurate 3-dimensional pictures of supernumerary teeth, local dental and bony structures which are very beneficial in terms of proper diagnosis and treatment planning and preventing complications which may occur. Janaki Medical College Journal of Medical Sciences (2017) Vol. 5(1): 5-15

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