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

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.

scholarly journals Two Different Applications of Class II Elastics with Nonextraction Segmental Techniques

2007 ◽  
Vol 77 (4) ◽  
pp. 694-700 ◽  
Author(s):  
Aslihan Uzel ◽  
Ilter Uzel ◽  
M. Serdar Toroglu
Keyword(s):  
Treatment Time ◽  
Control Period ◽  
Class Ii ◽  
Control Group ◽  
Treatment Groups ◽  
Facial Height ◽  
Lateral Cephalograms ◽  
Division 1 ◽  
The Mean ◽  
Class Ii Elastics

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.

scholarly journals Treatment of a skeletal Class II malocclusion using fixed functional appliance with miniplate anchorage

2014 ◽  
Vol 08 (02) ◽  
pp. 276-280 ◽  
Author(s):  
Mevlut Celikoglu ◽  
Tuba Unal ◽  
Mehmet Bayram ◽  
Celal Candirli
Keyword(s):  
Class Ii ◽  
Class Ii Malocclusion ◽  
Functional Appliance ◽  
Present Case Report ◽  
Skeletal Class ◽  
Fixed Functional Appliance ◽  
Skeletal Class Ii ◽  
Fixed Appliances ◽  
Mandibular Retrusion ◽  
Leveling And Alignment

ABSTRACTBased on our literature search, we found that the use of miniplate anchorage with Forsus fatigue-resistance device (FRD) has not yet been reported. Therefore, the aim of the present case report was to present the treatment of a patient with skeletal Class II malocclusion with mandibular retrusion using Forsus FRD with miniplate anchorage. Fixed appliances with 0.022-inch slots were attached to the maxillary teeth and after 8 months of the leveling and alignment of the upper arch, 0.019 × 0.025-inch stainless steel archwire was inserted and cinched back. Two weeks after the placement of the miniplates bilaterally at the symphysis of the mandible, Forsus FRD was adjusted to the miniplates with a 35-mm length of rod chosen. Nine months after the skeletal anchored Forsus worn, Class I canine and molar relations were achieved and overjet was eliminated.

scholarly journals “Effective” TMJ and Chin Position Changes in Class II Treatment

2008 ◽  
Vol 78 (5) ◽  
pp. 813-818 ◽  
Author(s):  
Christos Serbesis-Tsarudis ◽  
Hans Pancherz
Keyword(s):  
Class Ii ◽  
Control Group ◽  
Functional Appliance ◽  
Skeletal Class ◽  
Class Ii Treatment ◽  
Fixed Functional Appliance ◽  
Skeletal Class Ii ◽  
Edge Group ◽  
Multibracket Appliance ◽  
Class Ii Elastics

Abstract Objective: To evaluate the “effective” temporomandibular joint (TMJ) changes (the sum of condylar modeling, glenoid fossa modeling, and condylar position changes within the fossa), and their influence on chin position in patients with a Class II division 1 malocclusion treated orthodontically with a multibracket appliance and Class II elastics (Tip-Edge) and orthopedically with a fixed functional appliance (Herbst). Materials and Methods: Two groups of successfully treated subjects were evaluated: Tip-Edge (n = 24) and Herbst (n = 40). The Bolton Standards served as a control group. Lateral head films obtained before treatment and after an observation period of 2.6 years (Herbst also after 0.6-year period) were analyzed. Results: In comparison with the Herbst and control groups, the Tip-Edge group exhibited less favorable sagittal “effective” TMJ growth and chin position changes necessary for skeletal Class II correction. Conclusions: Orthodontic therapy with a multibracket appliance and Class II elastics seems not to have any favorable sagittal orthopedic effect on the mandible, while bite jumping with the Herbst appliance has a favorable sagittal orthopedic effect on a short-time basis.

scholarly journals Facial Profile Changes in Early Class II Correction with Cervical Headgear

2007 ◽  
Vol 77 (6) ◽  
pp. 960-967 ◽  
Author(s):  
Mirja Kirjavainen ◽  
Kirsti Hurmerinta ◽  
Turkka Kirjavainen
Keyword(s):  
Treatment Time ◽  
Class Ii ◽  
Upper Lip ◽  
Facial Profile ◽  
Nasolabial Angle ◽  
Lateral Cephalograms ◽  
Division 1 ◽  
Before And After ◽  
Profile Changes ◽  
Class Ii Division 1

Abstract Objective: To characterize the effects of early cervical headgear treatment on the facial profile of children in Class II division 1 malocclusion. 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 appliance. The headgear consisted of a long outer bow bent upward 15° and a large expanded inner bow. Lateral cephalograms were taken before and after treatment, and the facial profile was estimated from the cephalograms. The results were compared to an age- and sex-matched normal cohort of 644 Finnish children. Results: Class I molar relationship was achieved in all treated children. The treatment time was 1.6 (0.3–3.1) years on average. Compared to the controls, the treatment restricted the forward growth of maxillary A-point, and the SNA angle decreased 1.4° ± 1.2° per year (P < .00001). Decreased maxillary prognathism was associated with decreased facial convexity, g-sn-pg (P = .02), and the ANB (P < .00001) angles decreased compared to the controls. Upper lip protrusion (distance ls to sn-pg; P < .00001) was decreased, and the nasolabial angle (cm-sn-ls) widened despite the increased facial inclination of the upper incisors (P = .0005). The treatment significantly decreased the gap between the lips (P = .0009) in their relaxed position. Conclusion: Cervical headgear treatment in Class II correction is associated with a decreased facial convexity caused by the restriction of forward growth of the maxillary A-point, while the rest of the facial profile, including the mandible, continue to grow forward at a normal rate.

scholarly journals Fixed Functional Appliances

2021 ◽  
Vol 10 (31) ◽  
pp. 2499-2504
Author(s):  
Nandalal Girijalal Toshniwal ◽  
Pooja Changdev Katkade ◽  
Shubhangi Amit Mani ◽  
Nilesh Mote
Keyword(s):  
Class Ii ◽  
Masticatory Muscles ◽  
Mandibular Advancement ◽  
Emg Activity ◽  
Functional Appliance ◽  
Fixed Functional Appliance ◽  
Functional Appliances ◽  
Mandibular Protrusion ◽  
Emg Electrodes ◽  
Class Ii Elastics

Considering the large number of fixed functional appliances, choosing the best device for your patient is not an easy task. To describe the development of fixed functional appliances as well as our 20-year experience working with them. Fixed functional appliances are grouped into flexible, rigid and hybrid. They are different appliances, whose action is described here. Four clinical cases will be reported with a view in illustrating the different appliances. Rigid fixed functional appliances provide better skeletal results than flexible and hybrid ones. Flexible and hybrid appliances have similar effects to those produced by class II elastics. They ultimately correct class II with dentoalveolar changes. From a biomechanical standpoint, fixed functional appliances are more recommended to treat class II in dolichofacial patients, in comparison to class II elastics. The electromyographic (EMG) activity of masticatory muscles was monitored longitudinally with chronically implanted EMG electrodes to determine whether functional appliances produce a change in postural EMG activity of the muscles. Pre-appliance and post-appliance EMG levels in four experiments that had been fitted with functional appliances were compared against the background of EMG levels in controls without appliances. The insertion of two types of functional appliance to induce mandibular protrusion was associated with a decrease in postural EMG activity of the superior and inferior heads of the lateral pterygoid, superficial masseter, and anterior digastric muscles; the decrease in the first three muscles was statistically significant. This decreased postural EMG activity persisted for approximately 6 weeks, with a gradual return towards pre-appliance levels during a subsequent 6-week period of observation. Progressive mandibular advancement of 1.5 to 2 mm every 10 to 15 days did not prevent the decrease in postural EMG activity. KEY WORDS Orthodontics, Class II Malocclusion, Fixed Functional Appliance.

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.

scholarly journals Upper Airway Dimensions in Class II Malocclusion

2007 ◽  
Vol 77 (6) ◽  
pp. 1046-1053 ◽  
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.

scholarly journals Influence of Lateral Cephalometric Radiographs on Orthodontic Treatment Planning of Class II Patients

2018 ◽  
Vol 12 (1) ◽  
pp. 296-302
Author(s):  
Irina Stupar ◽  
Enver Yetkiner ◽  
Daniel Wiedemeier ◽  
Thomas Attin ◽  
Rengin Attin
Keyword(s):  
Treatment Planning ◽  
Orthodontic Treatment ◽  
Class Ii ◽  
Functional Appliance ◽  
Fixed Functional Appliance ◽  
Routine Manner ◽  
Knowing That ◽  
Signed Rank ◽  
Minor Influence ◽  
University Of Zurich

Background:Lateral Cephalometric Radiographs (LCR) are a common decision-making aid in orthodontic treatment planning and are routinely used in clinical practice. The aim of this present study was to test the null hypothesis that LCR evaluation does not alter specific components of orthodontic treatment planning in Class II patients.Materials and Methods:Records of 75 patients, who had been treated at the Department of Orthodontics, Centre of Dental Medicine, University of Zurich comprised the study material. Inclusion criteria were: (1) adolescents between the age of 12-15, (2) permanent dentition with Class II buccal segment relationship (3) absence of craniofacial and dento-alveolar malformations. Fifteen orthodontists from the dental faculties of Istanbul University, Istanbul and Ege University, Izmir filled out Likert-type linear scale questionnaires without knowing that they would repeat the same procedure with and without LCRs at two different time points. Equivalence and clinical relevance were assessed using (%95 CI) Wilcoxon signed rank tests.Results:Extraction decision did not differ between groups (p=0.68). Preference of functional appliance use (p=0.006) and inter-maxillary fixed functional appliance (p=0.043) was different among groups.Conclusion:LCR evaluation has minor influence on treatment planning procedure of Class II patients. It might be beneficial to consider its prescription not in a routine manner but as a supplementary tool considering possible reduction of radiation exposure.

scholarly journals Prediction of Individual Mandibular Changes Induced by Functional Jaw Orthopedics Followed by Fixed Appliances in Class II Patients

2006 ◽  
Vol 76 (6) ◽  
pp. 950-954 ◽  
Author(s):  
Lorenzo Franchi ◽  
Tiziano Baccetti
Keyword(s):  
Class Ii ◽  
Skeletal Maturation ◽  
Fixed Appliance ◽  
Mandibular Growth ◽  
Class Ii Treatment ◽  
Lateral Cephalograms ◽  
Sagittal Parameters ◽  
Fixed Appliances ◽  
Functional Jaw Orthopedics ◽  
Individual Responsiveness

Abstract Objective: To identify pretreatment cephalometric variables for the prediction of individual mandibular outcomes of functional jaw orthopedics (FJO) followed by fixed appliances in Class II patients treated at the peak in mandibular growth. Materials and Methods: The study was performed on 51 subjects (24 females, 27 males) with Class II malocclusion. First-phase therapy was accomplished with a twin block in 16 subjects, a stainless steel crown Herbst in 15 subjects, and an acrylic splint Herbst in 20 subjects. Lateral cephalograms were available at the start of treatment with FJO and at the completion of fixed appliance therapy. All subjects received FJO at the peak in mandibular growth (CS 3 at T1). Individual responsiveness to Class II treatment including FJO was defined on the basis of the T2-T1 increment in total mandibular length (Co-Gn) when compared with untreated Class II subjects. Results: Discriminant analysis identified a single predictive parameter (Co-Go-Me°) with a classification power of 80%. Pretreatment vertical and sagittal parameters were not able to improve the prediction based upon the mandibular angle. Conclusions: A Class II patient at the peak in skeletal maturation (CS 3) with a pretreatment Co-Go-Me° smaller than 125.5° is expected to respond favorably to treatment including FJO. A Class II patient at CS 3 with a pretreatment value for Co-Go-Me° greater than 125.5° is expected to respond poorly to treatment including FJO.

Sign in / Sign up

Export Citation Format

Share Document