scholarly journals A New Approach to Prevent Crown Loosening and Caries in the AdvanSync2 Class II Corrector

2020 ◽  
Vol 54 (1) ◽  
pp. 77-79
Author(s):  
Prasad Chitra
Keyword(s):  
Reliable Method ◽  
Class Ii ◽  
Vertical Force ◽  
Force Component ◽  
Herbst Appliance ◽  
New Approach ◽  
Immediate Placement ◽  
Fixed Appliances

The AdvanSync2 Class II corrector is a modification of the original Herbst appliance with advantages of immediate placement in conjunction with fixed appliances. Though easy to place and activate, the molar bands have a possibility of dislodgement due to the vertical force component from the telescopic arms requiring immediate intervention from the orthodontist. An easy and reliable method to prevent molar band dislodgement is highlighted.

Effect of the vertical force component of Class II elastics on the anterior intrusive force of maxillary archwire

1992 ◽  
Vol 14 (4) ◽  
pp. 280-284 ◽  
Author(s):  
T.-M. Xu ◽  
J.-X. Lin ◽  
J.-F. Huang ◽  
P. Cai ◽  
Q.-F. Tan
Keyword(s):  
Class Ii ◽  
Vertical Force ◽  
Force Component ◽  
Class Ii Elastics

scholarly journals The British Orthodontic Society MOrth Cases Prize 2019

2021 ◽  
pp. 146531252098287
Author(s):  
Adam C Jowett
Keyword(s):  
Class Ii ◽  
Functional Appliance ◽  
First Case ◽  
Permanent Molars ◽  
Fixed Appliances ◽  
Unerupted Teeth ◽  
Removable Appliance ◽  
Division 2 ◽  
Lower Arch ◽  
First Permanent Molars

This paper describes the orthodontic treatment of two cases that were successful in winning the British Orthodontic Society (BOS) Membership in Orthodontics (MOrth) Cases Prize in 2019. The first case describes the management of a 12-year-old girl with a Class II division 2 malocclusion complicated by moderate upper and lower arch crowding, multiple unerupted teeth, restored lower first permanent molars, pseudo-transposition of the lower left lateral incisor and canine, and diminutive upper lateral incisors. Treatment involved a combination of an upper removable appliance followed by upper and lower preadjusted edgewise fixed appliances. Anteroposterior correction and overbite reduction was achieved with triangular Class II elastics with posterior occlusal disengagement. Both upper permanent canines were exposed and aligned, and the diminutive upper incisors built up with resin-based composite. Treatment was completed over a period of 23 months. The second case describes the management of a 13-year-old boy with a Class II division 2 malocclusion complicated by severe upper and lower arch crowding with unerupted UR5, UL4, LR3, rotated LR5, an increased overbite complete to tooth, buccally displaced upper canines and hypoplastic upper first premolars. Treatment involved a first phase of functional appliance therapy, followed by the extraction of UR4, UL4, LL5, LR4 and upper and lower preadjusted edgewise fixed appliances over a 28-month period.

Teeth angulations after class II treatment with the Jones Jig followed by fixed appliances: A retrospective panoramic analysis

2020 ◽  
Vol 18 (3) ◽  
pp. 436-442
Author(s):  
Silvio Augusto Bellini-Pereira ◽  
Gabriel Querobim Sant’Anna ◽  
Maria Claudia Wagner ◽  
Aron Aliaga-DelCastillo ◽  
Mayara Paim Patel ◽  
...  
Keyword(s):  
Class Ii ◽  
Class Ii Treatment ◽  
Panoramic Analysis ◽  
Fixed Appliances

Application of QR Method for Analysis of Spatial-Mega Frame Structure

2011 ◽  
Vol 243-249 ◽  
pp. 6049-6052
Author(s):  
Wen Jun Pan ◽  
Xian Guo Ye ◽  
Lei Chang
Keyword(s):  
Finite Element ◽  
Variational Principle ◽  
Reliable Method ◽  
Frame Structure ◽  
New Approach ◽  
Nodal Displacement ◽  
Simplified Calculation ◽  
Node Displacement

With the generalized displacement parameters of spline knots chosen as basic unknowns, the node displacement functions of spatial mega frames were built up, then element node displacements could be expressed by these parameters. New stiffness equation of spatial mega frame was deduced according to energy variational principle. The nodal displacement and nodal forces were worked out by the displacement parameters of spline knots. Process of block assembling for spline-discretization matrix was introduced briefly. One spatial mega frame was calculated by QR method and different finite element softwares. Comparation among the results and those of references proves that QR method is exactly an economical, effective and reliable method for computation of spatial mega frames. It provides a new approach for simplified calculation to spatial mega structures, so has good theoretical and practical value.

scholarly journals Influence of Vertical Facial Growth Pattern on Herbst Appliance Effects in Prepubertal Patients: A Retrospective Controlled Study

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Maria Rita Giuca ◽  
Marco Pasini ◽  
Sara Drago ◽  
Leonardo Del Corso ◽  
Arianna Vanni ◽  
...  
Keyword(s):  
Growth Pattern ◽  
Class Ii ◽  
Growth Patterns ◽  
Response To Treatment ◽  
Controlled Study ◽  
Class Ii Malocclusion ◽  
Facial Growth ◽  
Herbst Appliance ◽  
Lateral Cephalograms ◽  
Vertical Growth Pattern

Introduction. The Herbst device is widely used for correction of class II malocclusions; however, most of the researches carried out on the Herbst appliance in literature do not take into account patients with a different mandibular divergence. The aim of this study was to investigate the effects of Herbst on dental and skeletal structures and to evaluate possible influence of vertical facial growth patterns. Methods. A retrospective study was conducted on lateral cephalograms of 75 growing patients (mean age: 9.9 ± 1.9 years) with class II malocclusion treated with Herbst. Subjects were divided into 3 groups using the mandibular divergence index (SN and GoMe angle). Cephalometric parameters were evaluated using the modified SO (sagittal occlusion) Pancherz’s analysis. A statistical analysis was conducted to evaluate differences among groups using ANOVA. Results. Our study showed differences in response to treatment depending on patient’s facial vertical growth pattern. Cranial base angle and mandibular rotation were significantly different (p<0.05) between hypodivergent patients and normodivergent patients and between hypodivergent and hyperdivergent subjects. Conclusion. Hypodivergent patients increased their mandibular divergence during treatment to a greater extent than normodivergents; moreover, hyperdivergent patients exhibited a decreased mandibular divergence at the end of the treatment.

scholarly journals Orthodontic Management of A Girl With Class Ii Div-2 Malocclusion With Deep Bite & Crowding: A Case Report

2016 ◽  
pp. 29-34
Author(s):  
Shamima Nargish ◽  
Md Zakir Hossain
Keyword(s):  
Case Report ◽  
Anterior Segment ◽  
Class Ii ◽  
Class I ◽  
Deep Bite ◽  
Canine Retraction ◽  
Fixed Appliances ◽  
Leveling And Alignment

We describe the treatment of a girl, age 18 years with Class II div-2 malocclusion with deep bite and crowding. Treatment consisted mainly of bite opening, 1st premolars extractions, canine retraction, arch co-ordination, leveling and alignment with Edgewise fixed appliances by multiloop technique. However the treatment resulted in Class I incisor relation with proper alignment of upper and lower anterior segment, an ideal overjet, overbite and incisor angulations. Ban J Orthod & Dentofac Orthop, April 2016; Vol-6 (1-2), P.29-34

scholarly journals Long-term skeletal effects of high-pull headgear followed by fixed appliances for the treatment of Class II malocclusions

2018 ◽  
Vol 88 (5) ◽  
pp. 530-537
Author(s):  
E. Erin Bilbo ◽  
Steven D. Marshall ◽  
Karin A. Southard ◽  
Verrasathpurush Allareddy ◽  
Nathan Holton ◽  
...  
Keyword(s):  
Class Ii ◽  
Class I ◽  
Control Group ◽  
Orthodontic Appliances ◽  
Skeletal Changes ◽  
Fixed Orthodontic Appliances ◽  
Horizontal Growth ◽  
Skeletal Effects ◽  
Fixed Appliances

ABSTRACT Objectives: The long-term skeletal effects of Class II treatment in growing individuals using high-pull facebow headgear and fixed edgewise appliances have not been reported. The purpose of this study was to evaluate the long-term skeletal effects of treatment using high-pull headgear followed by fixed orthodontic appliances compared to an untreated control group. Materials and Methods: Changes in anteroposterior and vertical cephalometric measurements of 42 Class II subjects (n = 21, mean age = 10.7 years) before treatment, after headgear correction to Class I molar relationship, after treatment with fixed appliances, and after long-term retention (mean 4.1 years), were compared to similar changes in a matched control group (n = 21, mean age = 10.9 years) by multivariable linear regression models. Results: Compared to control, the study group displayed significant long-term horizontal restriction of A-point (SNA = −1.925°, P &lt; .0001; FH-NA = −3.042°, P &lt; .0001; linear measurement A-point to Vertical Reference = −3.859 mm, P &lt; .0001) and reduction of the ANB angle (−1.767°, P &lt; .0001), with no effect on mandibular horizontal growth or maxillary and mandibular vertical skeletal changes. A-point horizontal restriction and forward mandibular horizontal growth accompanied the study group correction to Class I molar, and these changes were stable long term. Conclusions: One phase treatment for Class II malocclusion with high-pull headgear followed by fixed orthodontic appliances resulted in correction to Class I molar through restriction of horizontal maxillary growth with continued horizontal mandibular growth and vertical skeletal changes unaffected. The anteroposterior molar correction and skeletal effects of this treatment were stable long term.

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