scholarly journals Sagittal and Vertical Growth of the Maxillo–Mandibular Complex in Untreated Children: A Longitudinal Study on Lateral Cephalograms Derived from Cone Beam Computed Tomography

Sensors ◽  
2021 ◽  
Vol 21 (24) ◽  
pp. 8484
Author(s):  
Leah Yi ◽  
Hyeran Helen Jeon ◽  
Chenshuang Li ◽  
Normand Boucher ◽  
Chun-Hsi Chung
Keyword(s):  
Computed Tomography ◽  
Longitudinal Study ◽  
Cone Beam Computed Tomography ◽  
3D Imaging ◽  
Cranial Base ◽  
Cone Beam ◽  
Plane Angle ◽  
Vertical Growth ◽  
Mandibular Plane ◽  
Lateral Cephalograms

The aim of this longitudinal study was to evaluate the sagittal and vertical growth of the maxillo–mandibular complex in untreated children using orthogonal lateral cephalograms compressed from cone beam computed tomography (CBCT). Two sets of scans, on 12 males (mean 8.75 years at T1, and 11.52 years at T2) and 18 females (mean 9.09 years at T1, and 10.80 years at T2), were analyzed using Dolphin 3D imaging. The displacements of the landmarks and rotations of both jaws relative to the cranial base were measured using the cranial base, and the maxillary and mandibular core lines. From T1 to T2, relative to the cranial base, the nasion, orbitale, A-point, and B-point moved anteriorly and inferiorly. The porion moved posteriorly and inferiorly. The ANB and mandibular plane angle decreased. All but one subject had forward rotation in reference to the cranial base. The maxillary and mandibular superimpositions showed no sagittal change on the A-point and B-point. The U6 and U1 erupted at 0.94 and 1.01 mm/year (males) and 0.82 and 0.95 mm/year (females), respectively. The L6 and L1 erupted at 0.66 and 0.88 mm/year (males), and at 0.41 mm/year for both the L6 and the L1 (females), respectively.

Comparison of Three-Dimensional and Conventional Orthodontic Imaging Modalities for Localization of Impacted Maxillary Canines in Patients With Alveolar Cleft

2020 ◽  
pp. 105566562094698
Author(s):  
Parviz Padisar ◽  
Maryam Tofangchiha ◽  
Behzad Salari ◽  
Sonia Oveisi
Keyword(s):  
Computed Tomography ◽  
Diagnostic Accuracy ◽  
Cone Beam Computed Tomography ◽  
Root Resorption ◽  
Imaging Modalities ◽  
Cone Beam ◽  
Impacted Tooth ◽  
Alveolar Cleft ◽  
Adjacent Tooth ◽  
Lateral Cephalograms

Objective: The purpose of this study was to identify which diagnostic parameters related to impacted maxillary canines can be reliably detected by the conventional orthodontic radiographic modalities and which factors need to be assessed by cone-beam computed tomography (CBCT). Design: In this cross-sectional study, 8 orthodontists evaluated 7 parameters related to the position and anatomy of the impacted canines by means of 2-dimensional (2D) records. After 1 month, the same process was repeated by means of CBCT by the same clinicians. Setting: Qazvin University of Medical Sciences. Patients and Participants: Thirty-two patients with alveolar cleft and impacted maxillary canines who had CBCT scans, lateral cephalograms, and orthopantomographs as pretreatment records. Main Outcome Measure: The diagnostic accuracy of 2D and 3-dimensional (3D) radiographic modalities was compared with each other and also with the gold standard by 3 radiologists. Results: The diagnostic accuracy of 2D and 3D imaging modalities was not significantly different regarding the mesiodistal inclination of the impacted tooth ( P = .09), apex anatomy ( P = .10), and mesiodistal position of the apex ( P = .19). Cone-beam computed tomography had significantly higher diagnostic accuracy than conventional radiographic modalities regarding overlapping the adjacent tooth ( P = .001), labio–palatal and apico–coronal position of the crown tip, and root resorption of the adjacent tooth ( P = .01). Conclusion: The conventional orthodontic radiographic modalities were as accurate as CBCT for determination of impacted canine inclination, apex anatomy, and mesiodistal position of the apex. Cone-beam computed tomography showed higher diagnostic accuracy for other parameters.

3D imaging: the role of cone-beam computed tomography in dentistry: special reference to current guidelines

2012 ◽  
Vol 3 (3) ◽  
pp. 152-157 ◽  
Author(s):  
Jimmy Makdissi
Keyword(s):  
Computed Tomography ◽  
Special Reference ◽  
Cone Beam Computed Tomography ◽  
3D Imaging ◽  
Cone Beam ◽  
Dental Practice ◽  
New Challenges ◽  
Current Guidelines

Cone-beam computed tomography (CBCT) is a relatively new modality providing 3D imaging that has become more accessible than ever to dental practice. This brings in new challenges that need to be addressed. This article discusses the role of CBCT in dentistry and highlights the availability of current guidelines.

scholarly journals Three-dimensional Imaging in Implant Assessment for the Prosthodontist: Utilization of the Cone Beam Computed Tomography

2014 ◽  
Vol 4 (1) ◽  
pp. 23-33
Author(s):  
Minu Raju ◽  
Shobha J Rodrigues ◽  
Mahesh Mundathaje ◽  
Sabaa Qureshi
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
3D Imaging ◽  
Randomized Clinical Trials ◽  
Three Dimensional ◽  
Absorbed Dose ◽  
Cone Beam ◽  
Three Dimensional Imaging ◽  
Manual Search ◽  
Clinical Literature

ABSTRACT Background The evolution of cone beam computed tomo- graphy three-dimensional (CBCT 3D) imaging has dramatically changed the potential for presurgical and pretreatment planning, such that outcomes are more predictable and complications more avoidable. Purpose The purpose of this article was to systematically review scientific and clinical literature pertaining to the uses and benefits of 3D imaging CBCT for diagnosis and treatment planning in Implantology including prosthodontics. Materials and methods Various databases, like PubMed, EBSCOhost and ScienceDirect, were searched from 1998 to 2010 to retrieve articles regarding the clinical applications of CBCT in dentistry. Cone beam computed tomography in dentistry was used as a key phrase to extract relevant articles in dentistry. A manual search for the references from the retrieved articles was also completed. The articles published only in English, randomized clinical trials, prospective and retrospective clinical studies, laboratory and computer-generated research were included.   The search revealed 540 articles of which 447 were irrele- vant to the study and therefore excluded. Results Cone beam computed tomography has created an opportunity for clinicians to acquire the highest quality diagno- stic images with an absorbed dose that is comparable to other dental radiological examinations and less than a conventional CT. Therefore, if placement of an implant might approach a nerve, invade the sinus, or penetrate out of the confines of the jawbone, the patient should be offered a discussion of CBCT 3D imaging. In addition, CBCT 3D patients should be advised of the risks, benefits and alternatives to such treatment, based upon any additional data provided by the imaging. How to cite this article Rodrigues SJ, Mundathaje M, Raju M, Qureshi S. Three-dimensional Imaging in Implant Assessment for the Prosthodontist: Utilization of the Cone Beam Computed Tomography. Int J Prosthodont Restor Dent 2014;4(1):23-33.

Reliability of cephalograms derived of cone beam computed tomography versus lateral cephalograms to estimate cervical vertebrae maturity in a Peruvian population: A retrospective study

2020 ◽  
Vol 18 (2) ◽  
pp. 258-265
Author(s):  
Gustavo Echevarría-Sánchez ◽  
Luis Ernesto Arriola-Guillén ◽  
Violeta Malpartida-Carrillo ◽  
Pedro Luis Tinedo-López ◽  
Ricardo Palti-Menendez ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Retrospective Study ◽  
Cone Beam Computed Tomography ◽  
Cervical Vertebrae ◽  
Cone Beam ◽  
Lateral Cephalograms

Craniomaxillofacial Changes Using High-Pull J-Hook Headgear and Mini-Implant Anchorage in Adolescents: A Structural Superimposition Method

2021 ◽  
Vol 45 (6) ◽  
pp. 433-440
Author(s):  
Sunock Yun ◽  
Jae Hyun Park ◽  
Na-Young Chang ◽  
Hye Young Seo ◽  
Jae-Hyun Sung ◽  
...  
Keyword(s):  
Study Design ◽  
Cranial Base ◽  
Female Adolescents ◽  
Plane Angle ◽  
Mini Implants ◽  
Facial Height ◽  
Mandibular Plane ◽  
Lateral Cephalograms ◽  
Implant Anchorage ◽  
Stable Structures

Objective: The aim of this study was to compare the craniomaxillofacial changes when using high-pull J-hook headgear (HPJH) and mini-implants (MIs) as maxillary anchorage in adolescents. Study Design: 40 female adolescents with dentoalvolar protrusion were divided into 2 groups; the HPJH group (n=20) and the MI group (n=20). Lateral cephalograms taken before treatment (T0) and after anterior tooth retraction (T1) were superimposed on the stable structures and then craniomaxillofacial changes were evaluated. Results: The cranial base angle, SNB, and facial angle decreased in the HPJH group but increased in the MI group. ANB decreased more in the MI group than in the HPJH group. Mandibular plane angle increased in the HPJH group but decreased in the MI group. Facial height index increased in the MI group while it showed no change in the HPJH group. Mandibular true rotation occurred clockwise in the HPJH group and counterclockwise in the MI group. Maxillary central incisors were intruded and retracted more in the MI group than in the HPJH group. Maxillary first molars were extruded in the HPJH group and were intruded in the MI group. Maxillary first molars were protracted more in the HPJH group than in the MI group. Mandibular central incisors were retracted more in the HPJH group than the MI group. Mandibular first molars were extruded more in the MI group than in the HPJH group. Conclusion: More favorable craniomaxillofacial changes occurred in the MI group than in the HPJH group.

scholarly journals The relationship of vertical skeletofacial morphology to oropharyngeal airway shape using cone beam computed tomography: Possible implications for airway restriction

2013 ◽  
Vol 84 (3) ◽  
pp. 548-554 ◽  
Author(s):  
Jennifer A. Haskell ◽  
Bruce S. Haskell ◽  
Michael E. Spoon ◽  
Changyong Feng
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Cervical Vertebrae ◽  
Three Dimensional ◽  
Cone Beam ◽  
Deep Bite ◽  
Oropharyngeal Airway ◽  
Mandibular Plane ◽  
The Face ◽  
Relationship Of

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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