scholarly journals The Oropharyngeal Airway in Young Adults with Skeletal Class II and Class III Deformities: A 3-D Morphometric Analysis

PLoS ONE ◽  
2016 ◽  
Vol 11 (2) ◽  
pp. e0148086 ◽  
Author(s):  
Yasas Shri Nalaka Jayaratne ◽  
Roger Arthur Zwahlen
Keyword(s):  
Young Adults ◽  
Morphometric Analysis ◽  
Class Ii ◽  
Class Iii ◽  
Skeletal Class ◽  
Oropharyngeal Airway ◽  
Skeletal Class Ii

scholarly journals Craniofacial And Dentoalveolar Morphology In Individuals With Prader-Willi Syndrome: A Case-Control Study.

2021 ◽  
Author(s):  
Gisela Vasconcelos ◽  
Jo Stenehjem ◽  
Stefan Axelsson ◽  
Ronnaug Saeves
Keyword(s):  
Young Adults ◽  
Class Ii ◽  
Growth Direction ◽  
Control Group ◽  
Craniofacial Growth ◽  
Prader Willi Syndrome ◽  
Class Iii ◽  
Skeletal Class ◽  
Skeletal Class Ii ◽  
Lateral Cephalograms

Abstract Background: Prader-Willi syndrome (PWS) is a complex multisystem genetic disorder with distinct genetic and clinical features. Among other clinical symptoms, PWS is characterized by severe infantile hypotonia with feeding problems, childhood onset hyperphagia, obesity, scoliosis, short stature combined with growth hormone deficiency and developmental delay. PWS is associated with facial dysmorphology, orofacial dysfunction, oral abnormalities, low salivary flow and subsequent severe tooth wear. Little is known about the craniofacial growth direction or dental and skeletal relationships in individuals with PWS in different ages. The purpose of this study was to assess the craniofacial and dentoalveolar characteristics and to investigate the craniofacial growth direction separately in children, young adults and adults with PWS, using a cephalometric analysis of lateral cephalograms. Results: Lateral cephalograms of 42 individuals with a confirmed genetic diagnosis of PWS were analysed and divided into three groups according to their age: Children (< 12 years), young adults (12 – 20 years) and adults (> 20 years). Cephalometric variables were compared between PWS patients and healthy age- and sex-matched controls.Significant deviations and distinct craniofacial patterns were found in children, young adults and adults with PWS compared with the control group. Children showed retrognatic mandible with a skeletal class II relationship, posterior growth direction and longer anterior face height. The young adults had smaller cranial base angle, a skeletal class II pattern and a higher anterior lower face than the control group. Adults with PWS had a prognathic mandible, skeletal class III relationship with anterior growth direction, more retroclined lower incisors and proclined upper incisors than the controls. Similar results were found when comparing the three groups with PWS; the adults had a prognathic mandible, skeletal class III pattern and anterior growth direction. Children had a retropositioned mandibula, skeletal class II relationship and posterior growth direction. Conclusion: This study may contribute to a better understanding of the craniofacial growth pattern in children, young adults and adults with PWS and may have a clinical importance when planning dental treatment, such as prosthodontics and/or orthodontics.

scholarly journals Anatomical characteristics of mandibular bone in skeletal Class I, II and III patients by using cone beam computed tomography images in an iranian population

2021 ◽  
Vol 24 (2) ◽  
Author(s):  
Mohammad Zandi ◽  
Abbas Shokri ◽  
Vahid Mollabashi ◽  
Zahed Eghdami ◽  
Payam Amini
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Class Ii ◽  
Class I ◽  
Cone Beam ◽  
Class Iii ◽  
Anatomical Characteristics ◽  
Skeletal Class ◽  
Skeletal Class Ii ◽  
Ramus Height

Objetive: This study aimed to compare the anatomical characteristics of the mandible in patients with skeletal class I, II and class III disorders using cone beam computed tomography (CBCT). Material and Methods: CBCT scans of patients between 17 to 40 years taken with NewTom 3G CBCT system with 12-inch field of view (FOV) were selected from the archive. Lateral cephalograms were obtained from CBCT scans of patients, and type of skeletal malocclusion was determined (Class I, II or III). All CBCT scans were evaluated in the sagittal, coronal and axial planes using the N.N.T viewer software. Results: The ramus height and distance from the mandibular foramen to the sigmoid notch in class II patients were significantly different from those in skeletal class I (P < 0.005). Distance from the mandibular canal to the anterior border of ramus in class III individuals was significantly different from that in skeletal class I individuals (P < .005). Conclusion: Length of the body of mandible in skeletal class I was significantly different from that in skeletal class II and III patients. Also, ramus height in skeletal class I was significantly different from that in skeletal class II patients. CBCT had high efficacy for accurate identification of anatomical landmarks.   Keywords Prognathism; Retrognathism; Mandible; Anatomy; Cone beam computed tomography.

scholarly journals Relationship between skeletal Class II and Class III malocclusions with vertical skeletal pattern

2019 ◽  
Vol 24 (4) ◽  
pp. 63-72
Author(s):  
Sonia Patricia Plaza ◽  
Andreina Reimpell ◽  
Jaime Silva ◽  
Diana Montoya
Keyword(s):  
Class Ii ◽  
Class Ii Malocclusion ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Multinomial Regression ◽  
Lateral Cephalogram ◽  
Cross Sectional ◽  
Skeletal Class ◽  
Skeletal Class Ii ◽  
Skeletal Pattern

ABSTRACT Objective: The purpose of this study was to establish the association between sagittal and vertical skeletal patterns and assess which cephalometric variables contribute to the possibility of developing skeletal Class II or Class III malocclusion. Methods: Cross-sectional study. The sample included pre-treatment lateral cephalogram radiographs from 548 subjects (325 female, 223 male) aged 18 to 66 years. Sagittal skeletal pattern was established by three different classification parameters (ANB angle, Wits and App-Bpp) and vertical skeletal pattern by SN-Mandibular plane angle. Cephalometric variables were measured using Dolphin software (Imaging and Management Solutions, Chatsworth, Calif, USA) by a previously calibrated operator. The statistical analysis was carried out with Chi-square test, ANOVA/Kruskal-Wallis test, and an ordinal multinomial regression model. Results: Evidence of association (p< 0.05) between sagittal and vertical skeletal patterns was found with a greater proportion of hyperdivergent skeletal pattern in Class II malocclusion using three parameters to assess the vertical pattern, and there was more prevalent hypodivergence in Class III malocclusion, considering ANB and App-Bpp measurements. Subjects with hyperdivergent skeletal pattern (odds ratio [OR]=1.85-3.65), maxillary prognathism (OR=2.67-24.88) and mandibular retrognathism (OR=2.57-22.65) had a significantly (p< 0.05) greater chance of developing skeletal Class II malocclusion. Meanwhile, subjects with maxillary retrognathism (OR=2.76-100.59) and mandibular prognathism (OR=5.92-21.50) had a significantly (p< 0.05) greater chance of developing skeletal Class III malocclusion. Conclusions: A relationship was found between Class II and Class III malocclusion with the vertical skeletal pattern. There is a tendency toward skeletal compensation with both vertical and sagittal malocclusions.

Orthodontic-surgical treatment: neuromuscular evaluation in skeletal Class II and Class III patients

2012 ◽  
Vol 13 (3) ◽  
pp. 226-236 ◽  
Author(s):  
Giampietro Farronato ◽  
Lucia Giannini ◽  
Guido Galbiati ◽  
Giulia Sesso ◽  
Cinzia Maspero
Keyword(s):  
Surgical Treatment ◽  
Class Ii ◽  
Class Iii ◽  
Skeletal Class ◽  
Skeletal Class Ii

scholarly journals Dental anomalies in orthodontic patients with and without skeletal discrepancies

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Clarissa Christina Avelar Fernandez ◽  
Mônica Gentil Mattos ◽  
Christiane Vasconcellos Cruz Alves Pereira ◽  
Marcelo De Castro Costa
Keyword(s):  
Observational Studies ◽  
Class Ii ◽  
Systematic Search ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Dental Anomalies ◽  
Skeletal Class ◽  
Skeletal Malocclusion ◽  
Skeletal Class Ii ◽  
Orthodontic Patients

Objective:To determine whether individuals withskeletal discrepancies of Class II or IIIdisplay a higher frequency of dental anomalies in comparison with individuals with Class I malocclusion. Design:A systematic search of the main electronic medical scientific literaturedatabases was conducted. Observational studies were selected if mentioning dental anomalies in the different skeletal malocclusion patterns.Results:A total of 4,768 studies were found and the duplicated studies (1,279) were removed, resulting in 3,489 papers to be analyzed. After screening by title, 138 were fit for screening by abstract. After that, a total of 13 papers were carefully read in full. Five studies included dental anomaly frequencies in orthodontic patients and included 7,679 participants. The frequency of dental anomalies ranged from 11.2% to 40.3%.It was observed that individuals with skeletal discrepancies of Class II and III had more dental anomalies when compared to individuals with Class I.Conclusion:Individuals with skeletal malocclusion patternshave more dental anomalies and there is an association between dental anomalies and skeletal Class II or Class III malocclusion patterns.

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