An Electromyographic Investigation of the Perioral Musculature in Class II Division 1 Malocclusion

1977 ◽  
Vol 4 (1) ◽  
pp. 17-22 ◽  
Author(s):  
Mary McF. Simpson
Keyword(s):  
Muscle Activity ◽  
Class Ii ◽  
Muscle Group ◽  
Lip Seal ◽  
Division 1 ◽  
Incisor Retraction ◽  
Suprahyoid Muscle ◽  
Incisor Inclination ◽  
Electromyographic Investigation ◽  
Class Ii Division 1

The changes in lip activity associated with retraction of the upper labial segment during treatment of Class II division 1 malocclusion were investigated electromyographically. In the lip seal position muscle activity of the circumoral muscles was much reduced after treatment, but the amount of reduction appeared to be unrelated to the amount of incisor retraction. In some cases lips which were judged to be incompetent before treatment were competent after treatment. Activity in the suprahyoid muscle group associated with upper incisor inclination and overjet when the lips were sealed was eliminated during swallowing.

scholarly journals Class II Division 1 malocclusion treatment using TADs: Case report

2020 ◽  
Vol 67 (3) ◽  
pp. 159-164
Author(s):  
Tina Pajevic ◽  
Jovana Juloski ◽  
Marija Zivkovic
Keyword(s):  
Case Report ◽  
Orthodontic Treatment ◽  
Class Ii ◽  
Dental Arch ◽  
Class Ii Malocclusion ◽  
Posterior Teeth ◽  
Temporary Anchorage Devices ◽  
Division 1 ◽  
Incisor Retraction ◽  
Class Ii Division 1

Introduction. Orthodontic treatment of Class II Division 1 (II/1) malocclusions in adults can be challenging since skeletal effects are limited. Possible treatment options are orthodontic camouflage or orthognatic surgery, in severe cases. The aim of this paper was to present a successful management of Class II malocclusion in an adult patient using temporary anchorage devices (TADs). Case report. After detailed clinical examination, study models and cephalometric analysis, a 26 years old patient was diagnosed with Class II malocclusion, an overjet of 12 mm, congenitally missing tooth 41 and midline shifted to the right in upper dental arch. In prior orthodontic treatment, patient had upper premolars extracted. Posterior teeth in upper left quadrant were shifted mesially. The camouflage treatment was considered, using temporary anchorage devices (TADs) to distalize posterior teeth on the left side, and gain space for incisor retraction and midline correction in upper dental arch. Results. Using TADs as additional anchorage in anterior region and coil spring for molar distalization, the space was made for tooth 23, midline correction and incisor retraction. After 40 months, a satisfactory result was achieved, overjet and midline correction, class I canines occlusion and class II molar occlusion. Conclusion. Class II/1 malocclusion in adults can be successfully treated using TADs. The success depends on the severity of malocclusion and patient cooperation.

scholarly journals Prediction of Lip Changes after Incisor Retraction in Class II Division 1

2018 ◽  
Vol 7 (2) ◽  
pp. 48-53
Author(s):  
Jutharat Jongphairotkhosit ◽  
Supanee Suntornlohanakul ◽  
Nattaporn Youravong
Keyword(s):  
Class Ii ◽  
Division 1 ◽  
Incisor Retraction ◽  
Class Ii Division 1

scholarly journals Comparison of Maxillary and Mandibular Incisor Inclination in Class II Division 1 Malocclusion among Chinese Children

2013 ◽  
Vol 3 (2) ◽  
pp. 27-31
Author(s):  
Manju Bajracharya
Keyword(s):  
Class Ii ◽  
Chinese Children ◽  
Division I ◽  
Mandibular Incisor ◽  
Lateral Cephalograms ◽  
Division 1 ◽  
Set Up ◽  
Incisor Inclination ◽  
Average Angle ◽  
Class Ii Division 1

Objective: To determine maxillary and mandibular incisor inclination in Class II Division 1 malocclusion among different vertical skeletal type Chinese children. Materials & Method: Lateral cephalograms of Class II Division I malocclusion cases of 120 Chinese children (male-55, female-65) of the age range 12-14 years were divided into three vertical skeletal types (low angle, average angle, high angle) based on Sella-Nasion to Mandibular plane angle. To determine incisor inclination, lateral cephalometric radiographs were measured and analyzed using factorial analysis. All angular parameters were processed using ANOVA and t-test. Maxillary and mandibular incisor inclinations were discussed in detail among three vertical facial skeletal types. Result: The maxillary and mandibular incisors of low angle individuals were found to be proclined more than those with high and average angle individuals. Conclusion: Different vertical facial types of Class II Division I malocclusion in early permanent dentition accord to establish discriminate values to set up the cephalometric standards for diagnosis and treatment planning for the clinicians.  

scholarly journals Skeleto-Dental Changes After Camouflage Treatment in Class II division 1 Adult Patients with Average Mandibular Plane Angle

2011 ◽  
Vol 1 (1) ◽  
pp. 31-35
Author(s):  
Dashrath Kafle ◽  
Saruba Ulrich
Keyword(s):  
Statistical Significance ◽  
Class Ii ◽  
Plane Angle ◽  
Mandibular Plane ◽  
Division 1 ◽  
Molar Teeth ◽  
Incisor Retraction ◽  
Pre Treatment ◽  
Mandibular Plane Angle ◽  
Class Ii Division 1

Objective: To assess the skeleto-dental changes in adult Class II Division 1 patients with average mandibular plane angle after camouflage orthodontic treatment by premolars extraction. Materials and Method: Total 30 adult female patients, aged between 20-40 years with Class II Division 1 malocclusion with average mandibular plane angle (Mp-SN: 30-38) were selected for the study. Pre-treatment and post-treatment cephalographs were traced and different measurements are derived from skeletal and dental landmarks. Statistical analysis was done by paired t-test using SPSS software version 16.00. Results: SNA, SNB and ANB angles were reduced significantly. The maxillary length was also decreased significantly. However mandibular dimension was not changed significantly after camouflage treatment. The upper and lower incisors were significantly intruded whereas upper molar was slightly intruded and lower molar was significantly extruded. Antero-posteriorly, incisors were retracted significantly. Upper molars had negligible mesial movement however lower molars had moved mesially with statistical significance. Conclusion: During camouflage treatment care should be taken on incisor retraction. The vertical control of the molar teeth is important during the treatment period to avoid worsening of the facial proportion.

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.

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