scholarly journals Facial Profile Changes in Early Class II Correction with Cervical Headgear

2007 ◽  
Vol 77 (6) ◽  
pp. 960-967 ◽  
Author(s):  
Mirja Kirjavainen ◽  
Kirsti Hurmerinta ◽  
Turkka Kirjavainen
Keyword(s):  
Treatment Time ◽  
Class Ii ◽  
Upper Lip ◽  
Facial Profile ◽  
Nasolabial Angle ◽  
Lateral Cephalograms ◽  
Division 1 ◽  
Before And After ◽  
Profile Changes ◽  
Class Ii Division 1

Abstract Objective: To characterize the effects of early cervical headgear treatment on the facial profile of children in Class II division 1 malocclusion. 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 appliance. The headgear consisted of a long outer bow bent upward 15° and a large expanded inner bow. Lateral cephalograms were taken before and after treatment, and the facial profile was estimated from the cephalograms. The results were compared to an age- and sex-matched normal cohort of 644 Finnish children. Results: Class I molar relationship was achieved in all treated children. The treatment time was 1.6 (0.3–3.1) years on average. Compared to the controls, the treatment restricted the forward growth of maxillary A-point, and the SNA angle decreased 1.4° ± 1.2° per year (P < .00001). Decreased maxillary prognathism was associated with decreased facial convexity, g-sn-pg (P = .02), and the ANB (P < .00001) angles decreased compared to the controls. Upper lip protrusion (distance ls to sn-pg; P < .00001) was decreased, and the nasolabial angle (cm-sn-ls) widened despite the increased facial inclination of the upper incisors (P = .0005). The treatment significantly decreased the gap between the lips (P = .0009) in their relaxed position. Conclusion: Cervical headgear treatment in Class II correction is associated with a decreased facial convexity caused by the restriction of forward growth of the maxillary A-point, while the rest of the facial profile, including the mandible, continue to grow forward at a normal rate.

scholarly journals Assessment of facial profile changes in patients treated with maxillary premolar extractions

2012 ◽  
Vol 17 (5) ◽  
pp. 131-137 ◽  
Author(s):  
Renata Rodrigues de Almeida-Pedrin ◽  
Luciane Brigueli Marrone Guimarães ◽  
Marcio Rodrigues de Almeida ◽  
Renato Rodrigues de Almeida ◽  
Fernando Pedrin Carvalho Ferreira
Keyword(s):  
Class Ii ◽  
Post Treatment ◽  
Facial Profile ◽  
Lay People ◽  
Division 1 ◽  
Before And After ◽  
Profile Changes ◽  
Pre Treatment ◽  
Positive Effect ◽  
Class Ii Division 1

OBJECTIVE: Evaluate the facial profile changes of orthodontic treatment with extraction of two upper first premolars, from the perspective of orthodontists, dentists and lay people. METHODS: Facial profiles of radiographs taken before and after treatment of 70 patients with Class II, division 1 malocclusion were traced. The silhouettes of the 70 patients were randomly assembled in an album with, being two profiles on each sheet of the same patient. Then, 30 orthodontists, 30 dentists and 30 lay people chose the more esthetic facial profile (A or B), and the amount of change they perceived between the two profiles before and after treatment, according to a visual analog scale (VAS). RESULTS: The results revealed that 83 examiners preferred the post-treatment profiles, and only three dentists and four lay people chose the profiles pre-treatment more frequently. Thus, the orthodontists often chose the profiles after treatment, followed by dentists, with no statistically significant differences found between dentists and lay people. There were significant differences within groups in the preference of pre- and post-treatment profile. Furthermore, the three groups of evaluators indicated that pre and post-treatment profiles did not differ substantially. CONCLUSIONS: The treatment of Class II, division 1 malocclusion with extraction of two first premolars has a positive effect on facial profile esthetics.

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.

scholarly journals Changes on facial profile in the mixed dentition, from natural growth and induced by Balters' bionator appliance

2013 ◽  
Vol 18 (2) ◽  
pp. 108-115 ◽  
Author(s):  
Denise Rocha Goes Landázuri ◽  
Dirceu Barnabé Raveli ◽  
Ary dos Santos-Pinto ◽  
Luana Paz Sampaio Dib ◽  
Savana Maia
Keyword(s):  
Class Ii ◽  
Mixed Dentition ◽  
Skeletal Maturation ◽  
Control Group ◽  
Facial Profile ◽  
Significance Level ◽  
Nasolabial Angle ◽  
Division 1 ◽  
Profile Changes ◽  
Student’S T

OBJECTIVE: The purpose of this study was to evaluate the facial profile changes induced by Balters' bionator appliance in Class II division 1 patients, at mixed dentition stage. METHODS: The sample consisted of 28 prepubertal individuals at stages 1 and 2 of skeletal maturation (CVM), which were divided in two groups. The experimental group consisted of 14 individuals (7 boys and 7 girls, initial mean age of 8y12m) which were treated with Balters' bionator appliance for 14.7 months. The effects of treatment were compared to a control group of 14 subjects (7 boys and 7 girls, initial mean age of 8y5m) with Class II malocclusion, division 1, not orthodontically treated, which were followed up for 15.4 months. The statistical analysis was performed using Student's t test, at a significance level of 5%. RESULTS: The results showed that the Balters' bionator appliance promoted a significant increase on the mentolabial angle, in addition to demonstrating a tendency to reduce the facial skeletal convexity, to restrict the maxillary growth and to increase the nasolabial angle and the lower anterior facial height. CONCLUSION: It can be concluded that the Balters' bionator appliance improved the facial profile of children treated at mixed dentition stage.

scholarly journals Soft Tissue Profile Changes in Patients With Class II malocclusion

2021 ◽  
Author(s):  
Jovana Milutinovic ◽  
Zorana Stamenkovic ◽  
Ksenija Zelic ◽  
Nemanja Marinkovic ◽  
Nenad Nedeljkovic
Keyword(s):  
Soft Tissue ◽  
Orthodontic Treatment ◽  
Class Ii ◽  
T Test ◽  
Upper Lip ◽  
Positive Effects ◽  
Nasolabial Angle ◽  
Soft Tissue Profile ◽  
Division 1 ◽  
Class Ii Division 1

Abstract BackgroundThe objective of this study was to identify the soft tissue profile outcomes of orthodontic treatment of Class II, division 1 malocclusion patients and to determine if these changes are related with different treatment protocol.MethodsThe sample of this study consisted of 50 Caucasian patients [22 males; 28 females], with a mean age of 15.8 years. The sample was divided in two groups (both groups treated with multibracket therapy): first group was non-extraction group [25 patients] treated first with the Herbst appliance, and second group was four premolars extraction group [25 patients] treated with a multibracket appliance. The patients’ pre- and post-treatment profile photographs were used, and the soft tissue landmarks were identified. Afterwards, the angular parameters were determined on each photo. Paired-sample t-test was used for intragroup comparisons. For testing the differences in all parameter values between groups, two-sample t test was used.ResultsThe improvement in the non-extraction group was evident in the decrease of the nasomental angle [P=0.02], the angle representing the projection of the upper lip to the chin [P=0.01], as well as the upper lip angle [P=0.01]. On the other hand, the nasolabial angle increased significantly [P=0.01], as well as the mentolabial angle [P=0.02]. In the extraction group, the nasolabial angle showed a significant increase [P=0.03]. Two soft tissue variables showed significant differences between the groups: the total facial angle or facial convexity including the nose [P=0.04] and the angle presenting the projection of the upper lip to chin [P=0.01].ConclusionsThe patients treated without extractions showed a significant improvement of the convex profile and favorable soft tissue changes in the lower third of the face. The orthodontic treatment of Class II, division 1 malocclusions induce positive effects on the soft tissue facial profile, which depends on different treatment protocols.

scholarly journals Cephalometric changes in Class II division 1 patients treated with two maxillary premolars extraction

2013 ◽  
Vol 18 (4) ◽  
pp. 61-69 ◽  
Author(s):  
Marisana Piano Seben ◽  
Fabricio Pinelli Valarelli ◽  
Karina Maria Salvatore de Freitas ◽  
Rodrigo Hermont Cançado ◽  
Aristeu Correa Bittencourt Neto
Keyword(s):  
Class Ii ◽  
Upper Lip ◽  
Soft Tissue Profile ◽  
Lateral Cephalograms ◽  
Division 1 ◽  
Maxillary Premolars ◽  
Fixed Appliances ◽  
Cephalometric Changes ◽  
Tissue Alterations ◽  
Class Ii Division 1

OBJECTIVE: The purpose of this study was to evaluate the cephalometric alterations in patients with Angle Class II division 1 malocclusion, orthodontically treated with extraction of two maxillary premolars. METHODS: The sample comprised 68 initial and final lateral cephalograms of 34 patients of both gender (mean initial age of 14.03 years and mean final age of 17.25 years), treated with full fixed appliances and extraction of the first maxillary premolars. In order to evaluate the alterations due the treatment between initial and final phases, the dependent t test was applied to the studied cephalometric variables. RESULTS: The dentoskeletal alterations due to extraction of two maxillary premolars in the Class II division 1 malocclusion were: maxillary retrusion, improvement of the maxillomandibular relation, increase of lower anterior face height, retrusion of the maxillary incisors, buccal inclination, protrusion and extrusion of the mandibular incisors, besides the reduction of overjet and overbite. The tissue alterations showed decrease of the facial convexity and retrusion of the upper lip. CONCLUSIONS: The extraction of two maxillary premolars in Class II division 1 malocclusion promotes dentoskeletal and tissue alterations that contribute to an improvement of the relation between the bone bases and the soft tissue profile.

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.

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)

Electromyographic Muscular Activity Improvement in Class II Patients Treated with the Pre-Orthodontic Trainer

2014 ◽  
Vol 38 (4) ◽  
pp. 380-384 ◽  
Author(s):  
E A Satygo ◽  
A V Silin ◽  
G O Ramirez-Yañez
Keyword(s):  
Muscular Activity ◽  
Class Ii ◽  
Treated Group ◽  
Functional Appliance ◽  
Treatment Results ◽  
Division 1 ◽  
Before And After ◽  
Masseter Muscles ◽  
Normal Controls ◽  
Class Ii Division 1

Objective: A study was designed to determine changes in the amplitude of the EMG muscular activity of the Masseter and Temporalis muscles at clench in children with a Class II, division 1 malocclusion treated with the pre-orthodontic Trainer functional appliance, for 12 months. Study Design: 36 Class II, division 1 malocclusion patients (mean age 7.6 ± 1.3 years) composed the treated group and wore the functional appliance; 22 children with a similar age and malocclusion composed the untreated controls; and, 20 children with no dental malocclusion participated as normal controls. Electromyographic (EMG) muscular activity of the Temporalis and Masseter muscles were recorded before and after treatment. Results: Subjects in the treated group reported a bilateral significant increase in the muscular electrical activity in the both tested muscles (p < 0.001). After treatment, they recorded values similar to those measured in normal controls, whereas the untreated controls remained on lower values. Conclusion: These results confirm that treatment with the pre-orthodontic Trainer functional appliance significantly increases the EMG muscular activity in the Temporalis and Masseter muscles at clench in patients with Class II, division 1 malocclusion.

scholarly journals Two Different Applications of Class II Elastics with Nonextraction Segmental Techniques

2007 ◽  
Vol 77 (4) ◽  
pp. 694-700 ◽  
Author(s):  
Aslihan Uzel ◽  
Ilter Uzel ◽  
M. Serdar Toroglu
Keyword(s):  
Treatment Time ◽  
Control Period ◽  
Class Ii ◽  
Control Group ◽  
Treatment Groups ◽  
Facial Height ◽  
Lateral Cephalograms ◽  
Division 1 ◽  
The Mean ◽  
Class Ii Elastics

Abstract Objective: To evaluate the relative effects of Class II elastics applied directly with utility arches (UAs) or with the Reciprocal Mini–Chin Cup (RMCC) appliance. Materials and Methods: Thirty patients with Class II division 1 malocclusion were included. Fifteen of them were treated with the RMCC appliance and the other 15 treated with Class II elastics on UAs. Lateral cephalograms of an additional 15 untreated persons having the same characteristics as the treatment groups were used as a control group. Results: The mean control period was 10 months. Class I molar and canine relationships were achieved in a mean treatment time of 4.6 months with the RMCC appliance and in 8.5 months with the elastics on UAs. The amount of overjet reduction was 4.7 mm in the RMCC group (87.87% dental) and 5.2 mm in the UA group (80.76% dental). The molar correction was 4.5 mm in the RMCC group (87.36% dental) and 2.0 mm in the UA group (51.47% dental). The anterior lower facial height increased in both of the treatment groups. Conclusions: The RMCC appliance is a valuable alternative for Class II elastic use in Class II cases in which the upper molars need to be moved to the distal more than the upper incisors.

Sign in / Sign up

Export Citation Format

Share Document