Two Different Applications of Class II Elastics with Nonextraction Segmental Techniques

Abstract Objective: To evaluate the relative effects of Class II elastics applied directly with utility arches (UAs) or with the Reciprocal Mini–Chin Cup (RMCC) appliance. Materials and Methods: Thirty patients with Class II division 1 malocclusion were included. Fifteen of them were treated with the RMCC appliance and the other 15 treated with Class II elastics on UAs. Lateral cephalograms of an additional 15 untreated persons having the same characteristics as the treatment groups were used as a control group. Results: The mean control period was 10 months. Class I molar and canine relationships were achieved in a mean treatment time of 4.6 months with the RMCC appliance and in 8.5 months with the elastics on UAs. The amount of overjet reduction was 4.7 mm in the RMCC group (87.87% dental) and 5.2 mm in the UA group (80.76% dental). The molar correction was 4.5 mm in the RMCC group (87.36% dental) and 2.0 mm in the UA group (51.47% dental). The anterior lower facial height increased in both of the treatment groups. Conclusions: The RMCC appliance is a valuable alternative for Class II elastic use in Class II cases in which the upper molars need to be moved to the distal more than the upper incisors.

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Alveolar and symphysis regions of patients with skeletal class II division 1 anomalies with different vertical growth patterns

European Journal of Dentistry ◽

10.1055/s-0039-1698941 ◽

2012 ◽

Vol 06 (02) ◽

pp. 123-132 ◽

Cited By ~ 6

Author(s):

Elcin Esenlik ◽

Fidan Alakus Sabuncuoglu

Keyword(s):

Normal Subjects ◽

Class Ii ◽

Growth Patterns ◽

Control Group ◽

Skeletal Class ◽

Skeletal Class Ii ◽

Lateral Cephalograms ◽

Division 1 ◽

Main Factor ◽

Class Ii Division 1

ABSTRACTObjectives: The aim of this study was to investigate the alveolar and symphysis region properties in hyper-, hypo-, and normodivergent Class II division 1 anomaliesMethods: Pretreatment lateral cephalograms of 111 young adult female patients with skeletal Class II division 1 anomalies were compared to those of 54 Class I normal subjects (control group). Class II cases were divided into hyperdivergent (n = 58), hypodivergent (n = 19), and normodivergent groups (n = 34). The heights and widths of the symphysis and alveolus and the depth of maxillary palate were measured on the lateral cephalogramsResults: Mean symphysis width was wider in the hypodivergent Class II group than in the other groups, while mean symphysis height was similar among all groups. Maxillary palatal depth, upper incisor angle, upper and lower molar alveolar heights, and Id–Id′ width were also similar among groupsConclusion: Symphysis width is the main factor in the differential diagnosis of Class II division 1 anomaly rather than symphysis height and hypodivergent Class II Division 1 anomaly is more suitable for mandibular incisors movements. (Eur J Dent 2012;6:123-132)

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Upper Airway Dimensions in Class II Malocclusion

The Angle Orthodontist ◽

10.2319/081406-332 ◽

2007 ◽

Vol 77 (6) ◽

pp. 1046-1053 ◽

Cited By ~ 40

Author(s):

Mirja Kirjavainen ◽

Turkka Kirjavainen

Keyword(s):

Treatment Time ◽

Upper Airway ◽

Class Ii ◽

Class I ◽

Class Ii Malocclusion ◽

Cross Sectional ◽

Lateral Cephalograms ◽

Division 1 ◽

Upper Airway Structure ◽

Class Ii Division 1

Abstract Objective: To study the effects of cervical headgear treatment of Class II division 1 malocclusion on upper airway structures in children. Materials and Methods: Forty children aged 9.1 (7.2–11.5) years with Class II division 1 malocclusion were treated using a cervical headgear as the only treatment appliance. The headgear consisted of a long outer bow bent 15° upward and a large inner bow expanded 10 mm larger than the intermolar distance. Lateral cephalograms were taken before and after the treatment. Upper airway structures were estimated from the cephalograms. The results were compared to cross-sectional data of 80 age-matched controls with a Class I molar relationship. Results: A Class I molar relationship was achieved in all treated children. The mean treatment time was 1.6 (0.3–3.1) years. The Class II malocclusion was accompanied by a similar or wider nasopharyngeal space than in the controls but narrower oro- and hypopharyngeal spaces. The retropalatal area was widened by the treatment (P < .05), whereas the rest of the oropharynx and hypopharynx remained narrower than in the controls. Before the treatment, the mandibular plane was in a more horizontal position than in the controls, but during the treatment, it rotated to a position similar to that of the controls. Conclusion: Class II division 1 malocclusion is associated with a narrower upper airway structure even without retrognathia. Headgear treatment is associated with an increase in the retropalatal airway space.

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Treatment outcomes of Class II malocclusion cases treated with miniscrew-anchored Forsus Fatigue Resistant Device: A randomized controlled trial

The Angle Orthodontist ◽

10.2319/032717-214.1 ◽

2017 ◽

Vol 87 (6) ◽

pp. 824-833 ◽

Cited By ~ 8

Author(s):

Osama Eissa ◽

Mahmoud El-Shennawy ◽

Safaa Gaballah ◽

Ghada El-Meehy ◽

Tarek El Bialy

Keyword(s):

Controlled Trial ◽

Class Ii ◽

Maxillary Incisor ◽

Control Group ◽

Mandibular Incisor ◽

Treatment Groups ◽

Lateral Cephalograms ◽

Treatment Data ◽

Group 2 ◽

Forsus Fatigue Resistant Device

ABSTRACT Objective: To evaluate the skeletal, dental, and soft tissue effects of the Forsus Fatigue Resistant Device (FRD) used with miniscrew anchorage and compare them with those of the conventional Forsus FRD. Materials and Methods: This study was carried out on 38 patients. These patients were randomly allocated into three groups. The 14 patients in group 1 (aged 12.76 ± 1.0 years) were treated with the FRD appliance. In group 2, the 15 patients (aged 12.52 ± 1.12 years) received treatment with FRD using miniscrew anchorage, and the 9 patients in group 3 (aged 12.82 ± 0.9 years) received no treatment as a control group. Linear and angular measurements were made on lateral cephalograms before and immediately after Forsus treatment. Data were analyzed statistically using paired t-, ANOVA, and Tukey tests. Results: Class I molar relationship and overjet correction were achieved in both treatment groups. Although mandibular growth was statistically nonsignificant, there was a significant headgear effect on the maxilla. Mandibular incisor proclination, maxillary incisor retroclination, and distalization of maxillary molars were significant in both treatment groups. However, no significant differences were found between the treatment groups. Conclusions: Class II correction was mainly dentoalveolar in both treatment groups. Use of miniscrews with Forsus did not enhance mandibular forward growth nor prevent labial tipping of the mandibular incisors.

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Comparison of dentoskeletal and soft tissue effects of Class II malocclusion treatment with Jones Jig appliance and with maxillary first premolar extractions

Dental Press Journal of Orthodontics ◽

10.1590/2177-6709.24.2.056-065.oar ◽

2019 ◽

Vol 24 (2) ◽

pp. 56-65

Author(s):

Daniela Cubas Pupulim ◽

José Fernando Castanha Henriques ◽

Guilherme Janson ◽

Fernanda Pinelli Henriques ◽

Karina Maria Salvatore Freitas ◽

...

Keyword(s):

Soft Tissue ◽

Treatment Time ◽

Class Ii ◽

Treatment Protocols ◽

Soft Tissue Profile ◽

Lateral Cephalograms ◽

Division 1 ◽

Treatment Changes ◽

Group 2 ◽

Cephalometric Changes

Abstract Objective: The aim of this study was to compare the cephalometric changes in Class II division 1 malocclusion patients treated with Jones Jig appliance or with maxillary first premolar extractions. Methods: The sample consisted of 88 lateral cephalograms of 44 patients, divided into two groups. Group 1 consisted of 21 patients treated with Jones Jig appliance, with a mean initial age of 12.88 ± 1.23 years and final mean age of 17.18 ± 1.37 years, and a mean treatment time of 4.29 years. Group 2 comprised 23 patients treated with maxillary first premolar extractions, with a mean initial age of 13.59 ± 1.91 years and mean final age of 16.39 ± 1.97 years, and a mean treatment time of 2.8 years. Intergroup treatment changes were compared with t and Mann-Whitney tests. Results: Class II correction in G2 (maxillary first premolar extractions) presented significantly greater maxillary retrusion, reduction of anteroposterior apical base discrepancy, smaller increase in the lower anterior face height and significantly greater overjet reduction than G1 (Jones Jig). Conclusions: Treatment with maxillary first premolar extractions produced greater overjet reduction, but the two treatment protocols produced similar changes in the soft tissue profile.

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

The Angle Orthodontist ◽

10.2319/031107-123.1 ◽

2008 ◽

Vol 78 (2) ◽

pp. 361-369 ◽

Cited By ~ 40

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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Attractiveness of the facial profile: comparison of Class II patients treated with Twin Force® or intermaxillary elastics

Dental Press Journal of Orthodontics ◽

10.1590/2177-6709.26.5.e212014.oar ◽

2021 ◽

Vol 26 (5) ◽

Author(s):

Otávio Augusto POZZA ◽

Rodrigo Hermont CANÇADO ◽

Fabricio Pinelli VALARELLI ◽

Karina Maria Salvatore FREITAS ◽

Renata Cristina OLIVEIRA ◽

...

Keyword(s):

Group Treatment ◽

Treatment Time ◽

Class Ii ◽

Functional Appliance ◽

Facial Profile ◽

Fixed Functional Appliance ◽

Lateral Cephalograms ◽

Fixed Appliances ◽

Class Ii Elastics

ABSTRACT Objective: To compare the facial profile attractiveness of Class II patients treated with Twin Force® or intermaxillary elastics. Methods: Sample comprised 47 Class II patients divided into two groups: G1) TWIN FORCE - 25 patients treated with fixed appliances and Twin Force® fixed functional appliance (mean initial age was 17.91 ± 7.13 years, mean final age was 20.45 ± 7.18 years, and mean treatment time was 2.53 ± 0.83 years); G2) ELASTICS - 22 patients treated with fixed appliances and Class II intermaxillary elastics (mean initial age was 15.87 ± 5.64 years, mean final age was 18.63 ± 5.79 years and mean treatment time was 2.75 ± 0.60 years). Lateral cephalograms from pretreatment and posttreatment were used. Cephalometric variables were measured and silhouettes of facial profile were constructed and evaluated by 48 laypeople and 63 orthodontists, rating the attractiveness from 0 (most unattractive profile) to 10 (most attractive profile). Intergroup comparisons were performed with Mann-Whitney and independent t-tests. Results: At pretreatment, facial profile of the Twin Force® group was less attractive than the Elastics group. Treatment with Twin Force® or Class II elastics resulted in similar facial profile attractiveness, but the facial convexity was more reduced in the Twin Force® group. Orthodontists were more critical than laypeople. Conclusions: Treatment with Twin Force® or Class II elastics produced similar facial profile attractiveness at posttreatment. Profile attractiveness was reduced with treatment in the elastic group, and improved in the Twin Force® group. Facial convexity was more reduced with treatment in the Twin Force® group.

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A prospective controlled evaluation of Class II division 1 malocclusions treated with fixed lingual mandibular growth modificator

The Angle Orthodontist ◽

10.2319/070913-500.1 ◽

2013 ◽

Vol 84 (3) ◽

pp. 527-533 ◽

Cited By ~ 2

Author(s):

Osama H. Alali

Keyword(s):

Class Ii ◽

Growth Spurt ◽

Control Group ◽

Lower Incisor ◽

Mandibular Growth ◽

Lateral Cephalograms ◽

Division 1 ◽

Controlled Evaluation ◽

Treatment Observation ◽

Observation Period

ABSTRACT Objective: To assess the net dentofacial effects of the fixed lingual mandibular growth modificator (FLMGM). Materials and Methods: The study sample comprised 38 patients with Class II/1 malocclusion and retrognathic mandible. All were in the pubertal growth spurt. Whereas FLMGM was applied to the treatment group (n = 21, mean age = 13.2 years), no treatment was performed on the control group (n = 17, mean age = 12.5 years). Skeletal and dentoalveolar changes were assessed on digital lateral cephalograms obtained at the beginning and end of the treatment/observation period of 8 months. Paired and independent t-tests were used to assess the differences within and between groups. Results: Maxillary growth was not affected by FLMGM treatment, which resulted in a significant overjet reduction of 4.1 mm, an increase in total mandibular length (Co-Gn) of 2.3 mm, chin advancement of 1.6°, and upper incisor retroclination of 4.0°. A reduction of 2.4° in ANB was largely due to an increase of 1.8° in SNB. Favorably, the lower incisors were obviously retroclined by 4.5°. The changes in the vertical skeletal relationships were negligible. Conclusion: FLMGM was effective in treating growing Class II/1 patients and produced favorable dentofacial effects, with the matched untreated sample showing minimal changes. Lower incisor retroclination was a benefit of FLMGM treatment.

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Determination of the structural characteristics in youngsters from Ceará with Class II, division 1 malocclusion

Dental Press Journal of Orthodontics ◽

10.1590/s2176-94512012000400026 ◽

2012 ◽

Vol 17 (4) ◽

pp. 140-147

Author(s):

Keila Maria de Sousa Castelo ◽

Fausto Silva Bramante

Keyword(s):

Structural Characteristics ◽

Class Ii ◽

Northeastern Brazil ◽

Control Group ◽

Gender Dimorphism ◽

Dimensional Changes ◽

Lateral Cephalograms ◽

Division 1 ◽

Class Ii Division 1

OBJECTIVE: To determine the structural characteristics of Caucasian youths from Ceará State, Northeastern Brazil, presenting with Class II, Division 1 malocclusion and to investigate whether there is gender dimorphism based on the cephalometric variables assessed. METHODS: By means of lateral cephalograms, it was possible to determine the cephalometric characteristics of Class II, Division 1 malocclusion in a sample of 50 Caucasian youths from Ceará State, Brazil, of both genders (25 male and 25 female), aged between 9 and 14 years, who had not received previous orthodontic treatment. Sixteen cephalometric measures were evaluated and a comparison was made between the experimental group (Class II) and the control group (Class I), a sample comprising 50 Caucasian children from the Brazilian State of Ceará, of both genders (22 male and 28 female), aged 9 to 13 years, obtained from research conducted at the Study Center of the Federal University of Ceará (UCCB), Department of Orthodontics. CONCLUSIONS: Overall, the maxilla exhibited adequate positioning. The mandible showed a clear predominance of retrusion and dimensional changes in the sagittal direction. The facial vertical dimensions were increased. The maxillary incisors were well-positioned in their apical bases and with slight lingual inclination. The mandibular incisors were labially inclined and protruded. The study identified the presence of gender dimorphism in the following measures: P-Nperp, Co-A, Wits and ALFH.

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Treatment effects of the Forsus Fatigue Resistant Device used with miniscrew anchorage

The Angle Orthodontist ◽

10.2319/032613-240.1 ◽

2013 ◽

Vol 84 (1) ◽

pp. 76-87 ◽

Cited By ~ 30

Author(s):

Belma I. Aslan ◽

Ebru Kucukkaraca ◽

Cagri Turkoz ◽

Mufide Dincer

Keyword(s):

Control Sample ◽

Class Ii ◽

Control Group ◽

Average Period ◽

Linear Measurements ◽

Treatment Groups ◽

Maxillary Molars ◽

Lateral Cephalograms ◽

Mandibular Incisors ◽

Forsus Fatigue Resistant Device

ABSTRACT Objective: To evaluate the dentofacial effects of the Forsus Fatigue Resistant Device (FRD) used with miniscrew anchorage (FRDMS) and compare them with those of conventional FRD and an untreated Class II control group. Materials and Methods: The sample consisted of 48 Class II subjects. Sixteen patients (13.68 ± 1.09 years of age) were treated with FRDMS, whereas 17 subjects (14.64 ± 1.56 years of age) were treated with only FRD. Also, a control sample of 15 untreated Class II subjects (14.13 ± 1.50 years of age) was constructed. Angular and linear measurements were made on 96 lateral cephalograms. Paired t, one-way analysis of variance, and Tukey tests were used for statistical analysis. Results: Class I molar relationship and overjet correction were achieved in an average period of 6.5 ± 1.97 and 5.5 ± 1.80 months in the FRDMS and FRD groups, respectively. No skeletal effect was determined in both treatment groups. Greater overbite correction was found in the FRD group. Retrusion and extrusion of maxillary incisors, distalization of maxillary molars, and extrusion of mandibular molars were significant in both treatment groups. Labial tipping of mandibular incisors was significantly greater in the FRD group than in the FRDMS group. Conclusion: Overjet and molar correction was totally dentoalveolar. Unfavorable labial tipping of mandibular incisors was effectively minimized with the usage of miniscrews.

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Angle Class II correction with MARA appliance

Dental Press Journal of Orthodontics ◽

10.1590/s2176-94512013000100011 ◽

2013 ◽

Vol 18 (1) ◽

pp. 35-44 ◽

Cited By ~ 6

Author(s):

Kelly Chiqueto ◽

José Fernando Castanha Henriques ◽

Sérgio Estelita Cavalcante Barros ◽

Guilherme Janson

Keyword(s):

Young Patients ◽

Class Ii ◽

Occlusal Plane ◽

Control Group ◽

Skeletal Changes ◽

Lateral Cephalograms ◽

Division 1 ◽

Student’S T ◽

Student’S T Test ◽

Class Ii Division 1

OBJECTIVE: To assess the effects produced by the MARA appliance in the treatment of Angle's Class II, division 1 malocclusion. METHODS: The sample consisted of 44 young patients divided into two groups: The MARA Group, with initial mean age of 11.99 years, treated with the MARA appliance for an average period of 1.11 years, and the Control Group, with initial mean age of 11.63 years, monitored for a mean period of 1.18 years with no treatment. Lateral cephalograms were used to compare the groups using cephalometric variables in the initial and final phases. For these comparisons, Student's t test was employed. RESULTS: MARA appliance produced the following effects: Maxillary growth restriction, no change in mandibular development, improvement in maxillomandibular relationship, increased lower anterior facial height and counterclockwise rotation of the functional occlusal plane. In the upper arch, the incisors moved lingually and retruded, while the molars moved distally and tipped distally. In the lower arch, the incisors proclined and protruded, whereas the molars mesialized and tipped mesially. Finally, there was a significant reduction in overbite and overjet, with an obvious improvement in molar relationship. CONCLUSIONS: It was concluded that the MARA appliance proved effective in correcting Angle's Class II, division 1 malocclusion while inducing skeletal changes and particularly dental changes.

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