Unknown impact of an orthodontic functional appliance (Twin-block) on growth in Class II Division I malocclusions suggests caution

2002 ◽  
Vol 2 (1) ◽  
pp. 30-31
Keyword(s):  
Class Ii ◽  
Division I ◽  
Functional Appliance ◽  
Twin Block

scholarly journals Evaluation of changes seen in TMJ after mandibular advancement in treatment of Class II malocclusions, with functional appliances, a CBCT study

Biomedicine ◽  
2021 ◽  
Vol 41 (2) ◽  
pp. 236-242
Author(s):  
Ram Mohan Parvathy ◽  
Sandeep Shetty ◽  
Parveen Katheesa
Keyword(s):  
Three Dimensional ◽  
Class Ii ◽  
Mandibular Advancement ◽  
Class Ii Malocclusion ◽  
Functional Appliance ◽  
Functional Therapy ◽  
Twin Block ◽  
Functional Appliances ◽  
Level Of Significance ◽  
Forsus Fatigue Resistant Device

Introduction and Aim: Various functional appliances are developed to remodel the glenoid fossa and, thereby change the position of the mandible and correct Class II malocclusion. Many diagnostic aids have already been used to evaluate the changes ,but Cone Beam computed tomography (CBCT), three -dimensional diagnostic tool is rarely used .So this study was conducted with an aim is to evaluate the changes seen in the temporomandibular joint (TMJ) after mandibular advancement in class II malocclusions with functional appliance therapy, using CBCT, and also to assess and compare the efficacy of Twin Block, Power Scope and Forsus Fatigue Device used for the correction of class II malocclusion.Materials and Methods: The retrospective study was performed using the 52 CBCT scans of 26 patients with class II malocclusion due to retrognathic mandible. The subjects were divided into three groups based on appliance (Twin Block, Power Scope and Forsus Fatigue Resistant Device) used for the treatment. The changes seen in TMJ after mandibular advancement and condylar response to functional therapy was evaluated using the six. Data obtained were subjected to one-way Anova analysis with Posthoc Tukey test. Software SPSS version 20 was used to analyse the data. The level of significance was set at p < 0.05.Results: In subjects treated with Twin Block, the condyle was displaced slightly downwards and anteriorly; and condylar height was reduced. The decrease in the anterior and superior joint spaces were also found. In subjects treated with PowerScope and Forsus Fatigue Resistant Device, there was an increase in condylar height and width with a decrease in anterior and superior joint space.Conclusion: All three appliances were found to bring about changes in TMJ structures, but amongst them the Twin block has proved to be more efficient.

scholarly journals Myofunctional Trainer versus Twin Block in Developing Class II Division I Malocclusion: A Randomized Comparative Clinical Trial

2020 ◽  
Vol 8 (2) ◽  
pp. 44
Author(s):  
Yasmine Elhamouly ◽  
Azza A. El-Housseiny ◽  
Hanan A. Ismail ◽  
Laila M. El Habashy
Keyword(s):  
Clinical Trial ◽  
Class Ii ◽  
Division I ◽  
Healthy Children ◽  
Mean Values ◽  
Comparative Clinical Trial ◽  
Twin Block ◽  
The Mean ◽  
Mandibular Retrusion

This study aimed to evaluate and compare the dentoalveolar effects of the myofunctional trainer T4KTM versus twin block in children with class II division I malocclusion. Two parallel arm randomized comparative clinical trial was conducted, including twenty healthy children, 9–12 years old, showing Angle’s class II division I malocclusion due to mandibular retrusion. Children were randomly assigned into two groups according to the appliance used; Group 1: T4k, and Group II: twin block. Follow-up was done every 4 weeks for 9 months. Postoperative cephalometric X ray, study casts and photographs were taken for measurements and comparison. T4K showed a statistically significant reduction in the overjet (−2.50 ± 1.00 mm) (p < 0.0001), and a significant increase in the lower arch perimeter (LAP) (1.19 ± 0.96 mm) (p = 0.01). The twin block showed a statistically significant reduction in the overjet (−3.75 ± 1.10 mm) (p < 0.0001), a significant reduction in the overbite (−16.22 ± 17.02 %) (p = 0.03), and a significant increase in the LAP (1.69 ± 0.70 mm) (p < 0.0001). The overjet showed a higher significant decrease in the twin block group than in T4K (p = 0.03). The mean values of the overbite were significantly decreased in twin block than in T4k (p < 0.0001). Both groups showed significant dentoalveolar improvements toward class I occlusion; however, the twin block showed significantly better results than T4K appliance.

scholarly journals TWO PHASE FOR A BETTER FACE!! TWIN BLOCK AND HEADGEAR FOLLOWED BY FIXED THERAPY FOR CLASS II CORRECTION

2015 ◽  
Vol 05 (02) ◽  
pp. 074-079
Author(s):  
U S Krishna Nayak ◽  
Ashutosh Shetty ◽  
Crystal Runa Soans ◽  
Vivek Bhaskar
Keyword(s):  
Single Phase ◽  
Class Ii ◽  
Functional Appliance ◽  
Two Phase ◽  
Facial Profile ◽  
Fixed Appliance ◽  
Twin Block ◽  
Early Correction ◽  
The Social ◽  
Two Phases

AbstractCorrection of a skeletal sagittal Class II in a growing child can be done either in one single phase of treatment, or in two phases, i.e a first phase of functional appliance to reduce the severity of the skeletal discrepancy, followed by fixed appliance therapy to refine the occlusion. This 2 phase treatment has quite a few advantages such as early correction of the facial profile is seen by the child and parent, which motivates them, as well as, reduces the social handicap produced as a result of the malocclusion. Hence, this case report describes the treatment of a Class II child, with a Twin block appliance followed by fixed orthodontic treatment.

scholarly journals Study of Functional Appliance for Treatments of Children and Adolescents with Class II Malocclusion

2020 ◽  
Vol 47 (3) ◽  
pp. 235-247
Author(s):  
Himchan Kang ◽  
Koeun Lee ◽  
Misun Kim ◽  
Okhyung Nam ◽  
Hyo-seol Lee ◽  
...  
Keyword(s):  
Class Ii ◽  
Optimal Timing ◽  
Class Ii Malocclusion ◽  
Functional Appliance ◽  
Twin Block ◽  
Pubertal Growth ◽  
Functional Appliances ◽  
Maxilla And Mandible ◽  
Relationship Of ◽  
The Relationship

The purpose of this study was to evaluate the skeletal and dentoalveolar effects and optimal timing for treatment of class II malocclusion with functional appliances in children and adolescents.A group of 30 patients with class II malocclusion were divided into 3 groups according to their use of functional appliance: Twin block, Activator, Fränkel appliance. The group was also divided into 2 groups according to the cervical vertebrae maturation method. Lateral cephalometric radiographs were analyzed pretreatment (T0) and posttreatment (T1). Among the functional appliances, treatment with Twin block and Activator showed significant increase in the length of the mandible (Co-Gn) and the lower anterior facial height (ANS to Me), whereas the overjet and overbite were significantly reduced. Treatment with Fränkel appliance showed significant improvement in the relationship of maxilla and mandible. In addition, if the functional appliance was used during the period of pubertal growth peak, there was a significant increase in mandibular length, improvement in the relationship of maxilla and mandible, labial inclination of lower incisors and decrease in overjet compared to the treatment before pubertal growth peak. Therefore, this study indicates that using functional appliances for patients with class II malocclusion is effective and the optimal timing for using functional appliances is during pubertal growth peak.

scholarly journals Correction of Skeletal Sagittal Dysplasia using Twin Block Traction Technique

2016 ◽  
Vol 6 (1) ◽  
pp. 75-79
Author(s):  
VK Ravindranath ◽  
Sachin Doshi ◽  
Prateek Navratan Daga
Keyword(s):  
Class Ii ◽  
Mixed Dentition ◽  
Primary Concern ◽  
Functional Appliance ◽  
Twin Block ◽  
Skeletal Class ◽  
Skeletal Class Ii ◽  
Patient Reported ◽  
Vertical Growth Pattern ◽  
Relationship Of

ABSTRACT The primary concern of the patient as well as their parent seeking orthodontic treatment is the sagittal relationship of the dentition and jaws. Twin block is the most common functional appliance used successfully in correction of growing patient with skeletal class II malocclusion. However, the method of using extraoral traction in combination with twin block appliance (twin block traction technique) is to reinforce the functional component for correction of a class II sagittal relationship. A 12-year-old male patient reported to the Department of Orthodontics with a chief complaint of forwardly placed upper front teeth. With the help of clinical examination, cephalometrics, and diagnostic records, the diagnosis of the patient was confirmed as skeletal class II maxillomandibular relationship with prognathic maxilla and retrognathic mandible with a vertical growth pattern. The patient was treated with twin block appliance along with headgear. The appliance design and postfunctional results are demonstrated in the following case report. Although twin block with high-pull headgear is known to produce favorable results in mixed dentition, the same was observed in permanent dentition during growth phase. Combination of twin block appliance with high pull headgear gave the desired results. How to cite this article Daga PN, Karandikar GR, Ravindranath VK, Doshi S. Correction of Skeletal Sagittal Dysplasia using Twin Block Traction Technique. J Contemp Dent 2016;6(1): 75-79.

The twin-block appliance for correction of class II division 1 malocclusion

Dental Update ◽  
2021 ◽  
Vol 48 (7) ◽  
pp. 579-583
Author(s):  
Erfan Salloum ◽  
Declan T Millett ◽  
Grant T McIntyre
Keyword(s):  
Treatment Outcome ◽  
Children And Adolescents ◽  
Clinical Management ◽  
Class Ii ◽  
Functional Appliance ◽  
Twin Block ◽  
Division 1 ◽  
Case Assessment ◽  
The Uk ◽  
Class Ii Division 1

The twin-block appliance is a widely used functional appliance for the correction of Class II division 1 malocclusion in growing children and adolescents. This article outlines the indications and case assessment, the steps in clinical management and appliance design. Evidence regarding the mode of action, effects and prediction of treatment outcome of the twin-block appliance for Class II division 1 malocclusion are also presented. CPD/Clinical Relevance: The twin-block appliance is a widely used functional appliance in the UK for the correction of Class II division 1 malocclusion in growing children and adolescents.

A Functional Appliance System for the Correction of Class II Relationships

1989 ◽  
Vol 16 (3) ◽  
pp. 169-176 ◽  
Author(s):  
M. J. Trenouth
Keyword(s):  
Case Report ◽  
Class Ii ◽  
Rapid Maxillary Expansion ◽  
Posterior Arch ◽  
Class Ii Malocclusion ◽  
Maxillary Expansion ◽  
Functional Appliance ◽  
Twin Block ◽  
Arch Width ◽  
Removable Appliance

A technique is described for the correction of Class II malocclusion involving a functional appliance and consisting of three phases. 1. Adjustment of posterior arch width and dental alignment, using semi-rapid maxillary expansion by means of an upper removable appliance, to co-ordinate the anticipated positions for the arches. 2. Correction of the Class II dental relationships using a modification of the twin-block functional appliance. 3. Retention, using an upper removable appliance with a very steep anterior bite plane. The technique is illustrated by a case report.

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