scholarly journals Comparison of Activator-Headgear and Twin Block Treatment Approaches in Class II Division 1 Malocclusion

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Stjepan Spalj ◽  
Kate Mroz Tranesen ◽  
Kari Birkeland ◽  
Visnja Katic ◽  
Andrej Pavlic ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Skeletal Maturity ◽  
Normal Growth ◽  
Class Ii ◽  
Twin Block ◽  
Lateral Cephalograms ◽  
Division 1 ◽  
Functional Appliances ◽  
Growth Changes ◽  
Class Ii Division 1

The purpose was to compare the treatment effects of functional appliances activator-headgear (AH) and Twin Block (TB) on skeletal, dental, and soft-tissue structures in class II division 1 malocclusion with normal growth changes in untreated subjects. The sample included 50 subjects (56% females) aged 8–13 years with class II division 1 malocclusion treated with either AH (n=25) or TB (n=25) appliances. Pre- and posttreatment lateral cephalograms were evaluated and compared to 50 untreated class II division 1 cases matched by age, gender, ANB angle, and skeletal maturity. A paired sample, independent samples tests and discriminant analysis were performed for intra- and intergroup analysis. Treatment with both appliances resulted in significant reduction of skeletal and soft-tissue facial convexity, the overjet, and the prominence of the upper lip in comparison to untreated individuals (p<0.001). Retroclination of maxillary incisors and proclination of mandibular incisors were seen, the latter being significantly more evident in the TB group (p<0.05). Increase of effective mandibular length was more pronounced in the TB group. In conclusion, both AH and TB appliances contributed successfully to the correction of class II division 1 malocclusion when compared to the untreated subjects with predominantly dentoalveolar changes.

scholarly journals Immediate Skeletal and Dentoalveolar Effects of the Crown- or Banded Type Herbst Appliance on Class II division 1 Malocclusion

2008 ◽  
Vol 78 (2) ◽  
pp. 361-369 ◽  
Author(s):  
Gregory A. Barnett ◽  
Duncan W. Higgins ◽  
Paul W. Major ◽  
Carlos Flores-Mir
Keyword(s):  
Clinical Trials ◽  
Selection Criteria ◽  
Normal Growth ◽  
Class Ii ◽  
Control Group ◽  
Herbst Appliance ◽  
Lateral Cephalograms ◽  
Division 1 ◽  
Growth Changes ◽  
Class Ii Division 1

Abstract Objective: To evaluate the relative skeletal and dental changes produced by the crown- or banded-type Herbst appliance in growing Class II division 1 malocclusion cases. Materials and Methods: Several electronic databases were searched with the help of a health sciences librarian, without language limitation. Abstracts that appeared to fulfill the initial selection criteria (Herbst use and clinical trial) were selected by consensus, and their original articles were then retrieved. Clinical trials were selected that used lateral cephalograms to assess immediate skeletal and dental changes from the use of either crown or banded Herbst appliances. Clinical trials that employed other simultaneous potentially growth-modifying appliances or surgery were excluded. A comparable untreated Class II division 1 malocclusion control group was required to factor out normal growth changes. References from the selected articles were also hand searched. Results: Only three articles meet the selection criteria. Proclination and anterior movement of the lower incisors, overjet reduction, and improvement of first molar relationship thorough mesial movement of the first molars, reduction of ANB angle, and an increase in the mandibular plane angle were reported. There were mixed findings as to mandibular sagittal length and position and increases in lower face height, both anteriorly and posteriorly. No statistically significant changes were noted in the sagittal length or position of the skeletal maxilla. Conclusions: Dental changes have more impact than skeletal changes in the correction of Class II division 1 malocclusions with the crown or banded Herbst appliance.

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 Cephalometric evaluation of the effects of the Twin Block appliance in subjects with Class II, Division 1 malocclusion amongst different cervical vertebral maturation stages

2016 ◽  
Vol 21 (3) ◽  
pp. 73-84 ◽  
Author(s):  
Aisha Khoja ◽  
Mubassar Fida ◽  
Attiya Shaikh
Keyword(s):  
Soft Tissue ◽  
Class Ii ◽  
Post Treatment ◽  
Twin Block ◽  
Lateral Cephalograms ◽  
Division 1 ◽  
Maturation Stages ◽  
Cervical Vertebral Maturation ◽  
Treatment Observation ◽  
Class Ii Division 1

ABSTRACT Objectives: To evaluate the cephalometric changes in skeletal, dentoalveolar and soft tissue variables induced by Clark's Twin Block (CTB) in Class II, Division 1 malocclusion patients and to compare these changes in different cervical vertebral maturation stages. Methods: Pre- and post-treatment/observation lateral cephalograms of 53 Class II, Division 1 malocclusion patients and 60 controls were compared to evaluate skeletal, dentoalveolar and soft tissue changes. Skeletal maturity was assessed according to cervical vertebral maturation stages. Pre- and post-treatment/observation mean changes and differences (T2-T1) were compared by means of Wilcoxon sign rank and Mann-Whitney U-tests, respectively. Intergroup comparisons between different cervical stages were performed by means of Kruskal-Wallis test and Mann-Whitney U-test (p ≤ 0.05) . Results: When compared with controls, there was a significant reduction in ANB angle (p < 0.001), which was due to a change in SNB angle in CS-2 and CS-3 (p < 0.001), and in SNA (p < 0.001) and SNB (p = 0.016) angles in the CS-4 group. There was significant increase in the GoGn-SN angle in CS-2 (p = 0.007) and CS-4 (p = 0.024), and increase in Co-Gn and Go-Gn amongst all cervical stages (p < 0.05). There was significant decrease in U1-SN and increase in IMPA amongst all cervical stages (p < 0.05). There was significant retraction of the upper lip in CS-3 (p = 0.001), protrusion of the lower lip in CS-2 (p = 0.005), increase in nasolabial angle in CS-4 (p = 0.006) and Z-angle in CS-3 (p = 0.016), reduction in H-angle in CS-2 (p = 0.013) and CS-3 (p = 0.002) groups. When pre- and post-treatment mean differences were compared between different cervical stages, significant differences were found for SNA, SNB and UI-SN angles and overjet. . Conclusions: The Twin-Block along with the normal craniofacial growth improves facial esthetics in Class II, Division 1 malocclusion by changes in underlying skeletal and dentoalveolar structures. The favorable mandibular growth occurs during any of the cervical vertebral maturation stages, with more pronounced effect during CS-3 stage.

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

scholarly journals THE INFLUENCE OF THE SAGITTAL DENTOSKELETAL PATTERN ON THE VALUE OF THE SOFT TISSUE PROFILE ANGLES - A CEPHALOMETRIC STUDY

2019 ◽  
pp. 048
Author(s):  
Tatjana Perović ◽  
Milena Blažej ◽  
Ivan Jovanović
Keyword(s):  
Soft Tissue ◽  
Class Ii ◽  
Class I ◽  
Class Iii ◽  
Lower Face ◽  
Soft Tissue Profile ◽  
Lateral Cephalograms ◽  
Division 1 ◽  
Cephalometric Study ◽  
Class Ii Division 1

The aim of this study has been to establish the values of soft tissue profile angles in subjects with dentoskeletal Class I, Class II Division 1, Class II Division 2, and Class III pattern, in order to examine the influence of sagittal dentoskeletal relation on the value of angular profile parameters. This comparative cephalometric study included the examination and the analysis by lateral cephalograms to evaluate soft tissue profile angles for 120 adult Caucasian subjects (60 women and 60 men) from the mid Balkan region divided into four groups towards ANB angle and incisors inclination. The following angles were examined: angle of facial convexity, facial convexity angle for the lower face and the angle of total facial convexity. By investigating the influence of the sagittal dentoskeletal pattern on the value of facial convexity angles, significant differences have been established between subjects with Class I and Class II Division 1 and 2 for all examined angles (p<0.001; p=0.011), while the differences between Class I and Class III are only significant for the facial convexity angle and facial convexity angle for the lower face, while the differences in the overall facial convexity angle are not significant (p=0.067). There are significant differences between subjects for all examined angles except the total facial convexity angle between Class I and Class III.

scholarly journals Dentoskeletal and Soft Tissue Effects of Mini-Implants in Class II division 1 Patients

2009 ◽  
Vol 79 (2) ◽  
pp. 240-247 ◽  
Author(s):  
Madhur Upadhyay ◽  
Sumit Yadav ◽  
K. Nagaraj ◽  
Ravindra Nanda
Keyword(s):  
Soft Tissue ◽  
Treatment Effects ◽  
Class Ii ◽  
Complete Space ◽  
Mini Implants ◽  
Anterior Teeth ◽  
Lateral Cephalograms ◽  
Division 1 ◽  
Soft Tissue Changes ◽  
Class Ii Division 1

Abstract Objective: To examine the skeletal, dental, and soft tissue treatment effects of retraction of maxillary anterior teeth with mini-implant anchorage in nongrowing Class II division 1 female patients. Materials and Methods: Twenty-three patients (overjet ≥7 mm) were selected on the basis of predefined selection criteria. Treatment mechanics consisted of retraction of anterior teeth by placing mini-implants in the interdental bone between the roots of the maxillary first molar and second premolar. A force of 150 g was applied, bilaterally. Treatment effects were analyzed by taking lateral cephalograms and study casts at T1 (before initiation of retraction) and at T2 (after complete space closure). Results: The upper anterior teeth showed significant retraction (5.18 ± 2.74 mm) and intrusion (1.32 ± 1.08 mm). The upper first molar also showed some distal movement and intrusion, but this was not significant (P &gt; .05). The upper and lower lips were retracted by 2.41 mm and 2.73 mm, respectively, and the convexity angle reduced by over 2° (P &lt; .001). Conclusion: Mini-implants provided absolute anchorage to bring about significant dental and soft tissue changes in moderate to severe Class II division 1 patients and can be considered as possible alternatives to orthognathic surgery in select cases. (Angle Orthod. 2009:79; )

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