scholarly journals COLLUM’S ANGLE AND CROWN ROOT ANGLE OF MAXILLARY INCISORS IN DIFFERENT MALOCCLUSIONS

2021 ◽  
Vol 71 (1) ◽  
pp. 238-42
Author(s):  
Saadia Panezai ◽  
Nasrullah Mengal ◽  
Sadia Nisar Ahmed
Keyword(s):  
Class Ii ◽  
T Test ◽  
Process Data ◽  
Cross Sectional ◽  
Root Angle ◽  
Lateral Cephalograms ◽  
Division 1 ◽  
Collum Angle ◽  
Division 2 ◽  
Class Ii Division 1

Objective: To determine Collum angle and crown to root angle of maxillary central incisor in different skeletalmalocclusion. Study Design: Comparative cross sectional study. Place and Duration of Study: Orthondontics department, Bolan Medical College, Civil Sandman Hospital,Quetta, from Jun to Dec 2018. Methodology: Data sample consisted of 140 lateral cephalograms. Sample consisted of 74 female cephalograms and 66 male cephalograms. The mean age of sampled subjects ranged between 21.62 ± 5.96 years. The Colum angle of the maxillary central incisors in each group was measured. SPSS version 21 was used to enter and process data. Comparison between Class II division 1 and division 2 collum angles was made by applying student t-test. Results: The average value for Collum angle in class II division 1 sample was 4.38 ± 3.08 with minimum being 0and maximum 15 degree. The average values for Class II division 2 was 10.52 ± 4.37 with minimum 30 and amaximum 23 degree. Conclusion: Maxillary central incisors in all malocclusions had significantly different mean Collum angles fromzero. Paired sample t-test comparison showed that the Collum angle for maxillary central was much higher inClass II division 2.

scholarly journals Upper Airway Dimensions in Class II Malocclusion

2007 ◽  
Vol 77 (6) ◽  
pp. 1046-1053 ◽  
Author(s):  
Mirja Kirjavainen ◽  
Turkka Kirjavainen
Keyword(s):  
Treatment Time ◽  
Upper Airway ◽  
Class Ii ◽  
Class I ◽  
Class Ii Malocclusion ◽  
Cross Sectional ◽  
Lateral Cephalograms ◽  
Division 1 ◽  
Upper Airway Structure ◽  
Class Ii Division 1

Abstract Objective: To study the effects of cervical headgear treatment of Class II division 1 malocclusion on upper airway structures in children. Materials and Methods: Forty children aged 9.1 (7.2–11.5) years with Class II division 1 malocclusion were treated using a cervical headgear as the only treatment appliance. The headgear consisted of a long outer bow bent 15° upward and a large inner bow expanded 10 mm larger than the intermolar distance. Lateral cephalograms were taken before and after the treatment. Upper airway structures were estimated from the cephalograms. The results were compared to cross-sectional data of 80 age-matched controls with a Class I molar relationship. Results: A Class I molar relationship was achieved in all treated children. The mean treatment time was 1.6 (0.3–3.1) years. The Class II malocclusion was accompanied by a similar or wider nasopharyngeal space than in the controls but narrower oro- and hypopharyngeal spaces. The retropalatal area was widened by the treatment (P < .05), whereas the rest of the oropharynx and hypopharynx remained narrower than in the controls. Before the treatment, the mandibular plane was in a more horizontal position than in the controls, but during the treatment, it rotated to a position similar to that of the controls. Conclusion: Class II division 1 malocclusion is associated with a narrower upper airway structure even without retrognathia. Headgear treatment is associated with an increase in the retropalatal airway space.

The Crown to Root Angle of Maxillary Central Incisors in Different Incisal Classes

1983 ◽  
Vol 10 (3) ◽  
pp. 159-161 ◽  
Author(s):  
A. Williams ◽  
C. Woodhouse
Keyword(s):  
Class Ii ◽  
Central Incisor ◽  
Maxillary Central Incisor ◽  
Root Angle ◽  
Division 1 ◽  
Division 2 ◽  
Class Ii Division 1

The angulation of the maxillary central incisor crown to its root has been measured in 191 patients representing the four classes of incisor malocclusion. Significant differences were only found between Class II Division 1 and Class II Division 2 groups.

scholarly journals Prevalence of dental malocclusions in 12-year-old schoolchildren from Cuenca, Ecuador.

2018 ◽  
Vol 5 (1) ◽  
pp. 7-10
Author(s):  
Santiago Coello-Vásquez ◽  
Alberto Alvarado-Cordero ◽  
María Delgado-López ◽  
Luisa Salinas-Abarca
Keyword(s):  
Class Ii ◽  
Cross Sectional Study ◽  
High Rate ◽  
Class Iii ◽  
Cross Sectional ◽  
Public And Private ◽  
Significant Difference ◽  
Division 1 ◽  
Division 2 ◽  
Class Ii Division 1

The aim of this paper was to determine the prevalence of malocclusions in 12-year-old schoolchildren from Cuenca, Ecuador. A cross-sectional study was carried out, including a clinical examination of 181 schoolchildren aged 12 years, who were randomly selected from the schoolchildren population. We assessed the presence of malocclusions using the Angles classification. The analysis was performed in the program EpiInfo 7.2. The majority of the patients presented malocclusions (91.7%). There is no significant difference between public and private schools and the male sex was slightly more affected. There was a predominance of the Class II division 1 (30.4%), followed by Class III (25.4%), and Class I (24.9%), with the lowest prevalence reported for Class II division 2 (11%). A high rate of malocclusion was found in in 12-year-old schoolchildren from Cuenca, Ecuador, in both males and females. The dominant malocclusion in this study was Class II division 1.

Study Regarding the Applications of Imaging Technology in Cranial Base Morphology in Angle Class II Division 1 and 2 Malocclusions

2017 ◽  
Vol 68 (8) ◽  
pp. 1935-1939
Author(s):  
Ronen Boiangiu ◽  
Angelica Bencze ◽  
Elina Teodorescu ◽  
Stefan Milicescu Jr. ◽  
Viorica Tarmure ◽  
...  
Keyword(s):  
Normal Population ◽  
Class Ii ◽  
Cranial Base ◽  
Feminine Gender ◽  
Gonial Angle ◽  
Base Parameters ◽  
Lateral Cephalograms ◽  
Division 1 ◽  
Division 2 ◽  
Class Ii Division 1

The aim of the research is to investigate the characteristics of cranial base morphology in class II division 1 and class II division 2 malocclusions. The study group consisted of 40 patients aged 11 years treated at the Orthodontic Department of �Carol Davila� University. Both gender and both malocclusion types were equally represented. Lateral cephalograms were traced and 22 linear and angular cephalometric parameters were calculated: four parameters for the cranial base (N-S-Ba, N-Op-Ba angles, N-S, S-Ba lengths) and 18 parameters for the maxillofacial complex Nsa-Nsp, Go-Gn, Kdl-Go, S-Nsp, N-Nsa, Nsa-Gn, N-Gn, Nsp-Go, SNA angle, ANB angle, SN � NsaNsp angle, SN-GoGn angle, N-Nsa-Gn angle, S-Nsp-Go angle, N-Nsa-Pg angle, gonial angle, FMA angle, NsaNsp � GoGn. Statistical significant differences between cranial base parameters in the two malocclusions groups were depicted, in particular for feminine gender. Regardless of gender, the sphenoidal angle values were mainly increased in both malocclusion groups, when compared to normal population values. The S-Ba lengths were decreased in both malocclusion groups, regardless of gender. More significant alterations of cranial base morphology were depicted in patients with Class II Division 2 malocclusions then in patients with Class II Division 1 malocclusion. The study�s results sustain the existence of some cranial base alterations in Class II malocclusions.

scholarly journals Comparative Evaluation of Hyoid Bone Position and Tongue Area with Twin Block and Forsus: A Randomized Clinical Trial

2020 ◽  
Vol 10 (1) ◽  
pp. 55-64
Author(s):  
Raksha Rajput ◽  
Suchita Daokar
Keyword(s):  
Hyoid Bone ◽  
Class Ii ◽  
T Test ◽  
Twin Block ◽  
Equality Of Means ◽  
Lateral Cephalograms ◽  
Intergroup Comparison ◽  
Division 1 ◽  
Functional Appliances ◽  
Class Ii Division 1

Introduction: Class II div 1 malocclusion is most commonly presented with retruded mandible. This backward placement of mandible pushes the tongue posteriorly and inturn impairs the position of hyoid bone and total tongue area. Correction of retruded mandible with functional appliances is also considered to have positive effect on hyoid bone position and tongue area. Aim and Objectives: The objective of this study was to evaluate and compare the effects of Twin Block and Forsus on the hyoid bone position and tongue area in the treatment of Class II division 1 malocclusion. Materials & Method: A 2-arm parallel, randomized controlled trial was designed consisting of 24 Class II division 1 malocclusion patients indicated for treatment with functional appliances. 24 patients were randomized and equally divided among Twin Block (Group A) and Forsus (Group B) group. Pre- and post functional lateral cephalograms of both groups were traced and statistically analysed using paired t-test and T test of Equality of Means. ‘p’ value of less than 0.05 was considered as statistically significant. Result: A significantly upward and forward movement of hyoid bone was found with both the appliances. Tongue area also improved with Twin Block and Forsus group. On intergroup comparison insignificant results were observed between both the appliances indicating similar effect on tongue area and hyoid bone position. Conclusion: Twin Block has more skeletal effect than Forsus, still both Twin Block and Forsus are effective in improving tongue area and forward and upward displacement of hyoid bone position while correcting Class II malocclusion.

scholarly journals Anteroposterior and Vertical Components of Class II division 1 and division 2 Malocclusion

2009 ◽  
Vol 79 (5) ◽  
pp. 859-866 ◽  
Author(s):  
Emad A. A. Al-Khateeb ◽  
Susan N. Al-Khateeb
Keyword(s):  
Class Ii ◽  
Deep Bite ◽  
Common Features ◽  
Lateral Cephalograms ◽  
Division 1 ◽  
Skeletal Pattern ◽  
Almost All ◽  
Division 2 ◽  
Lower Incisors ◽  
Class Ii Division 1

Abstract Objective: To describe and analyze the skeletal and dental characteristics associated with Class II division 1 (Class II/1) and Class II division 2 (Class II/2) malocclusions in the anteroposterior and vertical dimensions. Materials and Methods: A total of 551 lateral cephalograms were used; 293 films of Class II/1 and 258 films of Class II/2 malocclusions. Lateral cephalographs were traced and analyzed. Parameters for both malocclusions were compared with each other and with the norms calculated for the Jordanian population in another study. Results: The maxilla was prognathic in both malocclusions. The mandible was retrognathic in Class II/1 and orthognathic in Class II/2. Vertically, LAFH was significantly reduced in patients with Class II/2 compared with subjects with Class II/1 who exhibited a significantly increased LAFH. In Class II/1, the lower incisors were proclined and the interincisal angle was reduced, while in Class II/2 the lower incisors were at a normal inclination and the interincisal angle was significantly increased. Conclusions: Class II/2 may be considered as a separate entity which differs in almost all skeletal and dental features from Class I and Class II/1. A Class II skeletal pattern and reduced interincisal angle were common features of Class II/1 malocclusion, while a Class II skeletal pattern, increased interincisal angle, and skeletal deep bite were common features of Class II/2 malocclusion.

Perbedaan Analisis Sefalometri Skeletal Sebelum dan Sesudah Perawatan Alat Myofunctional pada Pasien Maloklusi Dentoskeletal Kelas II Divisi I dalam Masa Pertumbuhan dengan Metode Steiner

2019 ◽  
Vol 4 (2) ◽  
Author(s):  
Nugroho Ahmad Riyadi
Keyword(s):  
Orthodontic Treatment ◽  
Class Ii ◽  
T Test ◽  
Analytic Study ◽  
Statistic Analysis ◽  
Twin Block ◽  
Normal Occlusion ◽  
Division 1 ◽  
Before And After ◽  
Class Ii Division 1

The aim of orthodontics treatment is normalization of teeth position in three planes, using various orthodontics appliance to reach the chepalometric standar and normal occlusion. Orthodontic treatment for dentoskeletal class II division 1 malocclusion in growing patients using myofunctional appliance may correct anteroposterior planes of mandibula. This study was a descriptive retrospective analytic study to look at the success of Orthodontic treatment for dentoskeletal class II division 1 in growing patients with myofunctional appliance using chepalometrics analysis Steiner value. The sample used in this study is chepalogram radiographic from patient with dentoskeletal class II division 1 malocclusion in growing patients before and after using myofunctional appliance in PPDGS orthodontics Clinic of Padjadjaran University. Statistic analysis were performed with pair t-test and Wilcoxon. Based on this study, it is concluded that orthodontic treatment with myofunctional appliance such as activator and twin block in growing patient with dentoskeletal class II division 1 malocclusion shows significant changes and compatibility with the normal criteria.

Comparative Dentoskeletal Study of Class II Division 1 and Class II Division 2 Malocclusion Subjects

2011 ◽  
Vol 1 (1) ◽  
pp. 36-41
Author(s):  
Jyoti Dhakal
Keyword(s):  
Class Ii ◽  
Class Ii Malocclusion ◽  
Basic Difference ◽  
Cephalometric Radiograph ◽  
Significant Difference ◽  
Division 1 ◽  
Dentoskeletal Morphology ◽  
Division 2 ◽  
Dental Cast ◽  
Class Ii Division 1

The dentoskeletal characteristics of Class II malocclusion subjects were evaluated using cephalometric radiograph and dental cast of 60 untreated patients. The sample included 30 Class II Division 1 and 30 Class II Division 2 malocclusion patients. The inter-canine, inter-premolar, inter-molar, inter-canine alveolar, inter-premolar alveolar, inter-molar alveolar widths are measured on study models. The result showed statistically significant difference between the groups for mandibular inter-canine width only. The cephalometric analysis revealed that SNB angle was responsible for the skeletal sagittal difference between the two groups except for the position of maxillary incisors. No basic difference in dentoskeletal morphology existed between Class II Division 1 and Class II Division 2 malocclusions.

scholarly journals Comparative Evaluation of Adenoids, Upper Airway, and Tongue Using “Predictors of Difficult Airways” in Class II Division 1 and Division 2 Cases with Class I Cases: Prospective In Vivo Observational Study

2021 ◽  
pp. 030157422096341
Author(s):  
Smita Mangesh Choudhari ◽  
Sunita Shrivastav
Keyword(s):  
Significant Positive Correlation ◽  
Upper Airway ◽  
Class Ii ◽  
Class I ◽  
Positive Correlation ◽  
Division 1 ◽  
Difficult Airways ◽  
Mandibular Protrusion ◽  
Division 2 ◽  
Class Ii Division 1

Introduction: Altered nasorespiratory function leads to altered craniofacial growth. Thus, airway evaluation is important for preventive, interceptive, and corrective orthodontic treatment. The aim of this study was to evaluate and compare adenoids, the upper airway, the tongue, and mandibular dimensions using “predictors of difficult airways” in class II division 1 and class II division 2 cases with class I cases. Method: Sixty subjects of age 15 to 18 years were divided into 3 groups (group 1: class I cases; group 2: class II division 1 cases; and group 3: class II division 2 cases) based on cephalometric parameters, with 20 cases in each group. Cephalometric evaluation of adenoids and the nasopharyngeal airway was done using the Handelman–Osborne area method. Upper and lower airway evaluation was done using McNamara’s linear method. “Predictors of difficult airways” were used for evaluation of the airway, which included nasal competency, the Mallampati scale, mandibular length, mandibular protrusion, and the thyromental distance. Results: The present study found a significant positive correlation between the grades of nasal competency and percentage adenoid wall area, and a significant negative correlation between the grades of nasal competency and the upper airway. There was a significant positive correlation between the grades of nasal competency and mandibular length, and a significant positive correlation between the grades of mandibular protrusion and mandibular length. There was a significant positive correlation between the grades of the thyromental distance and mandibular length. Conclusion: It was concluded that the “predictors of difficult airways” would be helpful in early diagnosis and identification of potential risk factors that may cause “breathing disorders”–related malocclusions and later on increase the risk of developing OSA.

scholarly journals Alveolar and symphysis regions of patients with skeletal class II division 1 anomalies with different vertical growth patterns

2012 ◽  
Vol 06 (02) ◽  
pp. 123-132 ◽  
Author(s):  
Elcin Esenlik ◽  
Fidan Alakus Sabuncuoglu
Keyword(s):  
Normal Subjects ◽  
Class Ii ◽  
Growth Patterns ◽  
Control Group ◽  
Skeletal Class ◽  
Skeletal Class Ii ◽  
Lateral Cephalograms ◽  
Division 1 ◽  
Main Factor ◽  
Class Ii Division 1

ABSTRACTObjectives: The aim of this study was to investigate the alveolar and symphysis region properties in hyper-, hypo-, and normodivergent Class II division 1 anomaliesMethods: Pretreatment lateral cephalograms of 111 young adult female patients with skeletal Class II division 1 anomalies were compared to those of 54 Class I normal subjects (control group). Class II cases were divided into hyperdivergent (n = 58), hypodivergent (n = 19), and normodivergent groups (n = 34). The heights and widths of the symphysis and alveolus and the depth of maxillary palate were measured on the lateral cephalogramsResults: Mean symphysis width was wider in the hypodivergent Class II group than in the other groups, while mean symphysis height was similar among all groups. Maxillary palatal depth, upper incisor angle, upper and lower molar alveolar heights, and Id–Id′ width were also similar among groupsConclusion: Symphysis width is the main factor in the differential diagnosis of Class II division 1 anomaly rather than symphysis height and hypodivergent Class II Division 1 anomaly is more suitable for mandibular incisors movements. (Eur J Dent 2012;6:123-132)

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