Overjet Stability after Treatment of Class II Division 1 Malocclusions

1975 ◽  
Vol 2 (4) ◽  
pp. 239-246 ◽  
Author(s):  
T. G. Bennett ◽  
J. F. Camilla Tulloch ◽  
Katherine W. L. Vig ◽  
W. G. Webb
Keyword(s):  
Class Ii ◽  
Lower Lip ◽  
Mean Values ◽  
Division 1 ◽  
Skeletal Pattern ◽  
Treatment Changes ◽  
The Mean ◽  
Relationship Of ◽  
The Relationship ◽  
Class Ii Division 1

The results of an analysis of treatment and post-treatment changes in 48 unselected Class II Division 1 malocclusions are presented. All the cases were at least 1 year out of retention (mean 34·7 months). Mean values have been given for several features. In particular, the mean overjet reduction during treatment was 7·0 mm, the mean relapse 1·1 mm and the mean net overjet reduction 5·9 mm. The relationship of “final” overjet to overbite, overjet, skeletal pattern and lower lip height at different stages of treatment is described. There is wide variation in “final” overjet in relation to any of the single factors investigated but five significant correlations were found.

Dentofacial Changes in Untreated Class II Division 1 Subjects

1987 ◽  
Vol 14 (4) ◽  
pp. 225-234 ◽  
Author(s):  
Nigel E. Carter
Keyword(s):  
Orthodontic Treatment ◽  
Class Ii ◽  
Linear Measurements ◽  
Male And Female ◽  
Mean Values ◽  
Mandibular Growth ◽  
Division 1 ◽  
The Mean ◽  
Mandibular Retrognathism ◽  
Class Ii Division 1

Basic descriptive cephalometric data are presented for 30 individuals with untreated Class II Division 1 malocclusions, 15 males and 15 females. Two radiographs of each subject were examined, the mean age for the first being 12 years one month, and for the second 17 years five months, thus spanning the period during which orthodontic treatment is usually carried out. Mean values for 38 bony and dentoalveolar parameters were calculated, and the male and female groups were compared. There was a tendency on average to a mild skeletal II pattern, with mild mandibular retrognathism. The mean increase in many of the linear measurements in the males was up to three times that seen in the females, and the females had a more downwards and backwards pattern of mandibular growth rotation than the males.

scholarly journals Evaluation of tongue posture & dimensions in relation to skeletal Class I and Class II patterns- A cephalometric study

2021 ◽  
Vol 7 (4) ◽  
pp. 276-281
Author(s):  
Puja Khanna ◽  
Sumit Chhabra ◽  
Preeti Munjal ◽  
Sunny Mittal ◽  
Nishtha Arora
Keyword(s):  
Statistical Tests ◽  
Class Ii ◽  
Class I ◽  
Control Group ◽  
Skeletal Class ◽  
Normal Occlusion ◽  
Division 1 ◽  
Skeletal Pattern ◽  
Bonferroni Test ◽  
Class Ii Division 1

Association of tongue posture with dental and facial skeletal pattern have been suggested in past. This study was undertaken to assess tongue posture and dimensions in Class I and Class II Dentoskeletal patterns to determine whether any correlation exists between tongue posture and skeletal pattern of an individual. Cephalograms of 150 individuals (aged 18-23 years), taken in Natural Head Position (NHP) and tongue at rest were divided into three groups i.e. Group 1 – Class I Normal occlusion, Group 2 – Class II Division 1 Normodivergent and Group 3 – Class II Division 1 Hypodivergent, consisting of 50 samples each. To ensure the rest position of tongue, patient was asked to relax for 30 seconds after coating the tongue with barium sulphate in midline and then to swallow, and the X-ray was taken at the end of swallowing. Each group was divided into two subgroups according to sex. Groups were constituted according to the Frankfort mandibular plane angle (FMA) angle. The subjects who had skeletal Class II pattern due to mandibular retrusion and not due to maxillary prognathism were only included in the study group. Statistical analysis was done using the software SPSS version 21.0. The statistical tests used were unpaired t-test and One-way ANOVA test with post-hoc bonferroni test. The p-value was considered significant if less than 0.05.The dorsum of the tongue was higher at back and lower in front in Class II Division 1 Hypodivergent group as compared to Class I Normal occlusion group (P<.05). Tongue height and tongue length were significantly reduced in Class II Division 1 Normodivergent and Class II Division 1 Hypodivergent malocclusion groups when compared to Class I control group (P<.05).The study supports the existence of a relationship between posture & dimensions of the tongue with Class I and Class II skeletal patterns.

scholarly journals Assessment of first molars sagittal and rotational position in Class II, division 1 malocclusion

2013 ◽  
Vol 18 (6) ◽  
pp. 106-111 ◽  
Author(s):  
Paulo Estevão Scanavini ◽  
Renata Pilli Jóias ◽  
Maria Helena Ferreira Vasconcelos ◽  
Marco Antonio Scanavini ◽  
Luiz Renato Paranhos
Keyword(s):  
Class Ii ◽  
Chi Square ◽  
Mean Values ◽  
Significance Level ◽  
Significant Difference ◽  
Division 1 ◽  
Chi Square Test ◽  
Student’S T ◽  
The Right ◽  
Class Ii Division 1

OBJECTIVE: This study assessed the anterior-posterior positioning of the upper and lower first molars, and the degree of rotation of the upper first molars in individuals with Class II, division 1, malocclusion. METHODS: Asymmetry I, an accurate device, was used to assess sixty sets of dental casts from 27 females and 33 males, aged between 12 and 21 years old, with bilateral Class II, division 1. The sagittal position of the molars was determined by positioning the casts onto the device, considering the midpalatal suture as a symmetry reference, and then measuring the distance between the mesial marginal ridge of the most distal molar and the mesial marginal ridge of its counterpart. With regard to the degree of rotation of the upper molar, the distance between landmarks on the mesial marginal ridge was measured. Chi-square test with a 5% significance level was used to verify the variation in molars position. Student's t test at 5% significance was used for statistical analysis. RESULTS: A great number of lower molars mesially positioned was registered, and the comparison between the right and left sides also demonstrated a higher number of mesially positioned molars on the right side of both arches. The average rotation of the molars was found to be 0.76 mm and 0.93 mm for the right and left sides, respectively. CONCLUSION: No statistically significant difference was detected between the mean values of molars mesialization regardless of the side and arch. Molars rotation, measured in millimeters, represented ¼ of Class II.

scholarly journals Craniofacial Morphology of Class II Division 1 Nepalese Population

2013 ◽  
Vol 11 (2) ◽  
pp. 10-13
Author(s):  
Manish Bajracharya ◽  
Umesh Parajuli ◽  
Praveen Mishra ◽  
Prakash Bhattarai ◽  
Reetu Shrestha
Keyword(s):  
Medical Journal ◽  
Class Ii ◽  
Craniofacial Morphology ◽  
Age Group ◽  
Normal Value ◽  
Normal Occlusion ◽  
Division 1 ◽  
The Mean ◽  
Cephalometric Measurements ◽  
Class Ii Division 1

Introduction: Class II Div 1 is a deviation from normal occlusion and may arise from combination of di" erentcraniofacial components.The objective of this study was to findnd out the different possible dental and skeletalcomponents that lead to Class II Div 1 malocclusion in Nepalese population.Methods: The lateral cephalogramradiographs consisted of 30 males and 30 females between the age group of 18 to 32 years. All the radiographswere traced with hand on acetate paper sheets. All the landmarks were identified, located and marked. Steiner’s analyses and McNamara analysis were done for the cephalometric measurements. The mean valueswere obtained and were compared with the established available values of the Nepalese and Caucasian normsusing independent t-test.Results: Size of the mandible was found to be lesser than the established normalvalues. Prognathic maxilla with retrognathic upper incisors and retrognathic mandible with proclined lowerincisors and was found to be the most common combinations of Class II Div 1 component.Conclusion: Size of the mandible is less than the normal value which is the main cause of the Class II Div 1 pattern in Nepalese population. Medical Journal of Shree Birendra Hospital; July-December 2012/vol.11/Issue2/10-13 DOI: http://dx.doi.org/10.3126/mjsbh.v11i2.7901 

A Study of Class II Division 1 Malocclusions Treated by the Andresen Appliance

1981 ◽  
Vol 8 (3) ◽  
pp. 159-163 ◽  
Author(s):  
A. M. Cohen
Keyword(s):  
Class Ii ◽  
Rate Of Growth ◽  
Facial Height ◽  
Division 1 ◽  
Treatment Changes ◽  
Class Ii Division 1

A study was carried out of Class II, Division 1 cases treated by the Andresen appliance. Results were determined in terms of overjet reduction and the reasons for failure were recorded for those cases who did not complete their treatment. Growth and treatment changes were assessed cephalometrically. It was found that those cases showing the more complete overjet reduction also tended to show more growth in facial height and a faster rate of growth in facial height when compared with the less successfully treated cases.

Impact of functional orthodontic treatment on facial attractiveness of children with Class II division 1 malocclusion

2019 ◽  
Vol 42 (2) ◽  
pp. 144-150 ◽  
Author(s):  
Sergio Paduano ◽  
Roberto Rongo ◽  
Rosaria Bucci ◽  
Giuseppe Carvelli ◽  
Iacopo Cioffi
Keyword(s):  
Orthodontic Treatment ◽  
Facial Attractiveness ◽  
Class Ii ◽  
Upper Lip ◽  
Chi Square ◽  
Lower Lip ◽  
Division 1 ◽  
Chi Square Test ◽  
Functional Appliances ◽  
Class Ii Division 1

Summary Background/objectives Whether orthodontic treatment with functional appliances improves facial aesthetics is still under debate. This study aimed to determine whether functional orthodontic treatment improves the facial attractiveness of patients with Class II division 1 malocclusion. Materials/method Extraoral lateral photographs of 20 children with Class I (CLI, 11.7 ± 0.8 years), and before (T1) and after treatment (T2) photographs of patients with Class II division 1 (CLII T1 and CLII T2; mean age ± SD = 11.1 ± 0.6 years) treated with functional appliances, were transformed into black silhouettes. Three panels of examiners including 30 orthodontists (39.0 ± 10.1 years), 30 dentists (40.0 ± 9.7) and 30 laypersons (39.0 ± 9.2) evaluated the attractiveness of patients’ silhouettes using a 100-mm visual analogue scale, and the sagittal position of patients’ upper lip, lower lip, and chin using a 3-point Likert scale. Two-way ANOVA and a chi-square test were used to test differences among groups. Statistically significance was set as P  <  0.05. Results The silhouettes of CLII T2 individuals were more attractive than those of the other groups (all Ps < 0.001). The upper lip, lower lip, and the chin of these individuals were judged to be normally positioned in 69.5 per cent, 74.9 per cent, and 72.3 per cent of the assessments, respectively (all Ps < 0.05). Limitations This study did not account for the psychological profile of the examiners, which may have affected the ratings. Conclusions/implications Orthodontic treatment with functional appliances is associated with a superior facial profile attractiveness. Functional treatment should be considered as a treatment option to improve the facial appearance of children with Class II division 1 malocclusion.

scholarly journals Soft tissue treatment changes with fixed functional appliances and with maxillary premolar extraction in Class II division 1 malocclusion patients

2017 ◽  
Vol 40 (2) ◽  
pp. 214-222 ◽  
Author(s):  
Guilherme Janson ◽  
Nuria Castello Branco ◽  
Aron Aliaga-Del Castillo ◽  
José Fernando Castanha Henriques ◽  
Juliana Fernandes de Morais
Keyword(s):  
Soft Tissue ◽  
Class Ii ◽  
Premolar Extraction ◽  
Division 1 ◽  
Functional Appliances ◽  
Treatment Changes ◽  
Class Ii Division 1
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