scholarly journals Herbst Treatment of Class II division 1 Malocclusions in Retrognathic and Prognathic Facial Types

2006 ◽  
Vol 76 (6) ◽  
pp. 930-941 ◽  
Author(s):  
Niko Bock ◽  
Hans Pancherz
Keyword(s):  
Class Ii ◽  
Mandibular Growth ◽  
Division 1 ◽  
Term Basis ◽  
Growth Changes ◽  
Subject Material ◽  
Facial Types ◽  
Facial Type ◽  
Class Ii Division 1

Abstract Objective: The aim of this retrospective pilot study was to analyze and compare the short-term and long-term changes of Herbst treatment in Class II division 1 subjects of the retrognathic and prognathic facial type. Materials and Methods: The subject material comprised 10 retrognathic (mean SNA = 74.5°, SNB = 70.4°, ML/NSL = 41.1°) and 16 prognathic (mean SNA = 86.7°, SNB = 81.5°, ML/NSL = 25.1°) Class II division 1 subjects treated with the Herbst appliance for an average period of 7 months. Lateral head films from before (T1), immediately after (T2), 12 months after (T3), and 39 months after (T4) Herbst treatment were analyzed with the SO-analysis (analysis of changes in sagittal occlusion) and standard cephalometrics. Results: During the treatment period (T2–T1) the two facial type groups showed similar favorable changes for all variables. During the posttreatment periods of 12 months (T3–T2) and 39 months (T4–T2) recovering changes occurred. In the long-term, a tendency of more unfavorable growth changes was stronger (not significant) for retrognathic subjects than for prognathic subjects. Conclusion: On a long-term basis, retrognathic subjects are prone to exhibit more unfavorable mandibular growth changes than prognathic subjects and, thus, might exhibit a greater risk for an occlusal relapse when a stable Class I occlusion is not attained after treatment.

scholarly journals Transverse maxillary and mandibular growth during and after Bionator therapy: study with metallic implants

2013 ◽  
Vol 18 (3) ◽  
pp. 72-79
Author(s):  
André da Costa Monini ◽  
Luiz Gonzaga Gandini Júnior ◽  
Luiz Guilherme Martins Maia ◽  
Ary dos Santos-Pinto
Keyword(s):  
Class Ii ◽  
Mandibular Growth ◽  
Metallic Implants ◽  
Division 1 ◽  
Before And After ◽  
Long Term Follow Up ◽  
Maxilla And Mandible ◽  
Class Ii Division 1

INTRODUCTION: This study evaluated posteroanterior cephalograms before and after treatment and long term follow-up of Class II division 1 patients treated with bionator. OBJECTIVE: The objective was to demonstrate the transverse growth of maxilla and mandible during and after bionator therapy. METHODS: Measurement of transverse dimensions between posterior maxillary and mandibular implants, as well as the distances between the buccal, gonial and antegonial points were recorded. Measurements were analyzed at three periods: T1 = before bionator therapy, T2 = after bionator therapy and T3 = 5.74 years after T2. RESULTS: There was statistically significant transverse increase due to growth and/or treatment for all variables, except for the distance between the anterior maxillary implants. CONCLUSIONS: During the study period only the anterior maxillary area did not show transverse growth.

Effectiveness of prefabricated myofunctional appliances in the treatment of Class II division 1 malocclusion: a systematic review

2019 ◽  
Vol 42 (2) ◽  
pp. 125-134 ◽  
Author(s):  
Hisham Mohammed ◽  
Emina Čirgić ◽  
Mumen Z Rizk ◽  
Vaska Vandevska-Radunovic
Keyword(s):  
Class Ii ◽  
Risk Of Bias ◽  
Qualitative Synthesis ◽  
Short Term ◽  
Eligibility Criteria ◽  
Division 1 ◽  
Term Basis ◽  
Reduced Costs ◽  
Class Ii Division 1

Summary Background Prefabricated myofunctional appliances (PMAs) are widely advocated for correcting Class II division I malocclusion. However, their effectiveness is associated with a high amount of uncertainty within contemporary literature. Objectives The aim of this review was to systematically examine the available literature regarding the effectiveness of PMAs in treating Class II division 1 malocclusion in children and adolescents. Search methods Comprehensive unrestricted electronic searches in multiple databases as well as manual searches were conducted up to August 2018. Selection criteria Randomized controlled trials (RCTs) and non-randomized studies (NRS) matching the eligibility criteria. Data collection and analysis Two independent review authors were directly involved in study selection, data extraction, and bias assessment. The Cochrane risk of bias tool and the ROBINS-I tool were used for assessing the risk of bias. Quantitative pooling of the data was undertaken with a random-effects model with its 95% confidence interval (CI). Results Three RCTs comparing PMAs to activators and three NRS comparing PMAs to untreated controls met the inclusion criteria. On a short-term basis, exploratory quantitative synthesis indicated that the activators were more effective than the PMAs in correcting overjet with a mean difference of (1.1 mm; 95% CI: 0.44 to 1.77). On a long-term basis, there were no significant differences between the two appliances. Qualitative synthesis indicated less favorable soft tissue changes as well as patient experiences and compliance with the PMAs when compared to the activators. However, PMAs were associated with reduced costs compared to customized activators and modest changes when compared to untreated controls. Conclusions On a short-term basis, low quality of evidence suggests that PMAs were generally less effective than the activators in treating Class II division 1 malocclusion. The main advantage of PMAs seems to be their reduced costs. These results should be viewed with caution, as a definitive need for high-quality long-term research into this area is required. Registration PROSPERO (CRD42018108564).

scholarly journals Fixed Lingual Mandibular Growth Modificator: a new appliance for Class II correction

2013 ◽  
Vol 18 (4) ◽  
pp. 70-81
Author(s):  
Osama Hasan Alali
Keyword(s):  
Case Report ◽  
Class Ii ◽  
Deep Bite ◽  
Mandibular Growth ◽  
Skeletal Class ◽  
Skeletal Class Ii ◽  
Division 1 ◽  
Class Ii Division 1

INTRODUCTION: This article demonstrates the description and use of a new appliance for Class II correction. MATERIAL AND METHODS: A case report of a 10-year 5 month-old girl who presented with a skeletally-based Class II division 1 malocclusion (ANB = 6.5º) on a slightly low-angle pattern, with ML-NSL angle of 30º and ML-NL angle of 22.5º. Overjet was increased (7 mm) and associated with a deep bite. RESULTS: Overjet and overbite reduction was undertaken with the new appliance, Fixed Lingual Mandibular Growth Modificator (FLMGM). CONCLUSION: FLMGM may be effective in stimulating the growth of the mandible and correcting skeletal Class II malocclusions. Clinicians can benefit from the unique clinical advantages that FLMGM provides, such as easy handling and full integration with bracketed appliance at any phase.

scholarly journals Analysis of Maxillary Bone Thickness at Incisor Area in Class II Division 1 Malocclusion

2011 ◽  
Vol 1 (1) ◽  
pp. 42-46
Author(s):  
Manju Bajracharya
Keyword(s):  
Treatment Plan ◽  
Class Ii ◽  
High Angle ◽  
Bone Thickness ◽  
Linear Measurements ◽  
Jaw Bone ◽  
Division 1 ◽  
Facial Types ◽  
Average Angle ◽  
Class Ii Division 1

Objectives: To determine and analyze the maxillary incisal jaw bone thickness among different vertical skeletal facial types of Class II Division 1 malocclusion. Materials and method: The samples (n=121) between 12-14 yrs of age were divided into three groups (low angle, average angle, high angle) based on their SN-MP angle. Linear measurements were processed and analyzed statistically. The characteristics of abnormal incisor jaw bone thickness at upper and lower incisors among three vertical facial skeletal types were studied in detail. Results: At the upper and lower central incisors low angle individuals presented greater dentoalveolar, basal bone thickness than high and average angle individuals. The distance from the root apex of upper and lower central incisors were far away from the lingual cortex in low angle than high angle individuals. Conclusion: Among different vertical facial types with Class II Division 1 malocclusion in early permanent dentition may accord to establish discriminate values as a sample to set up the cephalometric standard for the appropriate diagnosis to provide better treatment plan for the clinicians.

A long-term statistical study of treated Class II, Division 1 malocclusions

1975 ◽  
Vol 67 (6) ◽  
pp. 697-698
Author(s):  
Peter E. Paulos ◽  
Robert S. Portenga ◽  
Richard D. Seabold
Keyword(s):  
Statistical Study ◽  
Class Ii ◽  
Division 1 ◽  
Class Ii Division 1

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.

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