scholarly journals Changes on facial profile in the mixed dentition, from natural growth and induced by Balters' bionator appliance

2013 ◽  
Vol 18 (2) ◽  
pp. 108-115 ◽  
Author(s):  
Denise Rocha Goes Landázuri ◽  
Dirceu Barnabé Raveli ◽  
Ary dos Santos-Pinto ◽  
Luana Paz Sampaio Dib ◽  
Savana Maia
Keyword(s):  
Class Ii ◽  
Mixed Dentition ◽  
Skeletal Maturation ◽  
Control Group ◽  
Facial Profile ◽  
Significance Level ◽  
Nasolabial Angle ◽  
Division 1 ◽  
Profile Changes ◽  
Student’S T

OBJECTIVE: The purpose of this study was to evaluate the facial profile changes induced by Balters' bionator appliance in Class II division 1 patients, at mixed dentition stage. METHODS: The sample consisted of 28 prepubertal individuals at stages 1 and 2 of skeletal maturation (CVM), which were divided in two groups. The experimental group consisted of 14 individuals (7 boys and 7 girls, initial mean age of 8y12m) which were treated with Balters' bionator appliance for 14.7 months. The effects of treatment were compared to a control group of 14 subjects (7 boys and 7 girls, initial mean age of 8y5m) with Class II malocclusion, division 1, not orthodontically treated, which were followed up for 15.4 months. The statistical analysis was performed using Student's t test, at a significance level of 5%. RESULTS: The results showed that the Balters' bionator appliance promoted a significant increase on the mentolabial angle, in addition to demonstrating a tendency to reduce the facial skeletal convexity, to restrict the maxillary growth and to increase the nasolabial angle and the lower anterior facial height. CONCLUSION: It can be concluded that the Balters' bionator appliance improved the facial profile of children treated at mixed dentition stage.

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 Assessment of first molars sagittal and rotational position in Class II, division 1 malocclusion

2013 ◽  
Vol 18 (6) ◽  
pp. 106-111 ◽  
Author(s):  
Paulo Estevão Scanavini ◽  
Renata Pilli Jóias ◽  
Maria Helena Ferreira Vasconcelos ◽  
Marco Antonio Scanavini ◽  
Luiz Renato Paranhos
Keyword(s):  
Class Ii ◽  
Chi Square ◽  
Mean Values ◽  
Significance Level ◽  
Significant Difference ◽  
Division 1 ◽  
Chi Square Test ◽  
Student’S T ◽  
The Right ◽  
Class Ii Division 1

OBJECTIVE: This study assessed the anterior-posterior positioning of the upper and lower first molars, and the degree of rotation of the upper first molars in individuals with Class II, division 1, malocclusion. METHODS: Asymmetry I, an accurate device, was used to assess sixty sets of dental casts from 27 females and 33 males, aged between 12 and 21 years old, with bilateral Class II, division 1. The sagittal position of the molars was determined by positioning the casts onto the device, considering the midpalatal suture as a symmetry reference, and then measuring the distance between the mesial marginal ridge of the most distal molar and the mesial marginal ridge of its counterpart. With regard to the degree of rotation of the upper molar, the distance between landmarks on the mesial marginal ridge was measured. Chi-square test with a 5% significance level was used to verify the variation in molars position. Student's t test at 5% significance was used for statistical analysis. RESULTS: A great number of lower molars mesially positioned was registered, and the comparison between the right and left sides also demonstrated a higher number of mesially positioned molars on the right side of both arches. The average rotation of the molars was found to be 0.76 mm and 0.93 mm for the right and left sides, respectively. CONCLUSION: No statistically significant difference was detected between the mean values of molars mesialization regardless of the side and arch. Molars rotation, measured in millimeters, represented ¼ of Class II.

scholarly journals Facial profile changes due to bone cement graft to manage the hyperactive muscles of the gingival smile

2020 ◽  
Vol 25 (2) ◽  
pp. 44-51
Author(s):  
Érica Miranda de Torres ◽  
José Valladares-Neto ◽  
Karina de Oliveira Bernades ◽  
Luis Fernando Naldi ◽  
Hianne Miranda de Torres ◽  
...  
Keyword(s):  
Bone Cement ◽  
Wilcoxon Test ◽  
Upper Lip ◽  
Facial Profile ◽  
Significance Level ◽  
Nasolabial Angle ◽  
Pmma Bone Cement ◽  
Graft Thickness ◽  
Profile Changes ◽  
Pmma Cement

ABSTRACT Objective: To evaluate facial profile changes promoted by polymethyl methacrylate (PMMA) cement graft to reduce excessive gingival display due to hyperactivity of the elevator muscles of the upper lip during smiling. Methods: Eleven patients (all females, age range: 20 to 43 years) presenting gingival smile that were treated with PMMA cement grafts in a private clinic were selected for this retrospective study. Three angular and ten linear cephalometric facial profile measurements were performed preoperatively (baseline, T1) and at least 6 months postoperatively (T2). Differences between T1 and T2 were verified by Wilcoxon test, and the correlation between the thickness of the graft and facial profile changes was statistically evaluated by Spearman’s Coefficient test. The significance level was set at p< 0.05. Results: The nasolabial angle (p= 0.03) and the labial component of the nasolabial angle showed statistically significant differences (p= 0.04), with higher values in T2. No correlations were found between the graft thickness and the statistically significant facial profile changes (p> 0.05). Conclusions: The PMMA bone cement graft projected the upper lip forward, thereby increasing the nasolabial angle without affecting the nasal component. No correlations between the graft thickness and the facial profile changes were detected.

scholarly journals SKELETAL AND DENTAL CHANGES INDUCED BY BIONATOR IN EARLY TREATMENT OF CLASS II

2016 ◽  
Vol 38 (2) ◽  
pp. 205
Author(s):  
Dirceu Barnabé Raveli ◽  
João Paulo Schwartz ◽  
Taísa Boamorte Raveli ◽  
Ary Dos Santos Pinto ◽  
Bryan Tompson
Keyword(s):  
Early Treatment ◽  
Treatment Time ◽  
Class Ii ◽  
Treated Group ◽  
Control Group ◽  
Differential Growth ◽  
Chi Square ◽  
Significance Level ◽  
Chi Square Test ◽  
Student’S T

The purpose was to investigate the amount of skeletal and dentoalveolar changes after early treatment of Class II, Division 1 malocclusion with bionator appliance in prepubertal growing patients. Forty Class II patients were divided in two groups. Treated group consisted of 20 subjects treated consecutively with bionator. Mean age at the start of treatment (T0) was 9.1 years, while it was 10.6 years at the end of treatment (T1). Mean treatment time was 17.7 months. Pretreatment and post-treatment cephalometric records of treated group were evaluated and compared with a control group consisted of 20 patients with untreated Class II malocclusion. Intergroup comparisons were performed using Student’s t-tests and chi-square test with Yates’ correction at a significance level of 5 per cent. Bionator appliance was effective in generating differential growth between the jaws. Cephalometric skeletal measurements ANB, WITS, Lafh, Co-A and dental L6-Mp, U1.Pp, IsIi, OB, OJ showed statistically significantly different from the control. Bionator induced more dentoalveolar changes than skeletal during treatment in prepubertal stage. 

scholarly journals Assessment of facial profile changes in patients treated with maxillary premolar extractions

2012 ◽  
Vol 17 (5) ◽  
pp. 131-137 ◽  
Author(s):  
Renata Rodrigues de Almeida-Pedrin ◽  
Luciane Brigueli Marrone Guimarães ◽  
Marcio Rodrigues de Almeida ◽  
Renato Rodrigues de Almeida ◽  
Fernando Pedrin Carvalho Ferreira
Keyword(s):  
Class Ii ◽  
Post Treatment ◽  
Facial Profile ◽  
Lay People ◽  
Division 1 ◽  
Before And After ◽  
Profile Changes ◽  
Pre Treatment ◽  
Positive Effect ◽  
Class Ii Division 1

OBJECTIVE: Evaluate the facial profile changes of orthodontic treatment with extraction of two upper first premolars, from the perspective of orthodontists, dentists and lay people. METHODS: Facial profiles of radiographs taken before and after treatment of 70 patients with Class II, division 1 malocclusion were traced. The silhouettes of the 70 patients were randomly assembled in an album with, being two profiles on each sheet of the same patient. Then, 30 orthodontists, 30 dentists and 30 lay people chose the more esthetic facial profile (A or B), and the amount of change they perceived between the two profiles before and after treatment, according to a visual analog scale (VAS). RESULTS: The results revealed that 83 examiners preferred the post-treatment profiles, and only three dentists and four lay people chose the profiles pre-treatment more frequently. Thus, the orthodontists often chose the profiles after treatment, followed by dentists, with no statistically significant differences found between dentists and lay people. There were significant differences within groups in the preference of pre- and post-treatment profile. Furthermore, the three groups of evaluators indicated that pre and post-treatment profiles did not differ substantially. CONCLUSIONS: The treatment of Class II, division 1 malocclusion with extraction of two first premolars has a positive effect on facial profile esthetics.

scholarly journals Angle Class II correction with MARA appliance

2013 ◽  
Vol 18 (1) ◽  
pp. 35-44 ◽  
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.

scholarly journals Dentoskeletal effects produced by a Jasper Jumper with an anterior bite plane

2016 ◽  
Vol 86 (5) ◽  
pp. 775-781 ◽  
Author(s):  
Turi Bassarelli ◽  
Lorenzo Franchi ◽  
Efisio Defraia ◽  
Birte Melsen
Keyword(s):  
Matched Control ◽  
Class Ii ◽  
Control Group ◽  
Comprehensive Treatment ◽  
Class Ii Malocclusion ◽  
Significant Movement ◽  
Lateral Cephalograms ◽  
Division 1 ◽  
Student’S T ◽  
Class Ii Division 1

ABSTRACT Objective:  The aim of this retrospective study was to evaluate the dentoskeletal effects produced by a modified Jasper Jumper with an anterior bite plane for the correction of Class II division 1 malocclusion. Materials and Methods:  A sample of 32 growing patients (mean age  =  11.9 ± 1.4 years) with Class II division 1 malocclusion and increased overbite were treated with a modified Jasper Jumper (JJ) and anterior bite plane protocol and compared with a matched control group of 30 subjects with untreated Class II malocclusion (mean age 12.2 ± 0.8 years). Lateral cephalograms were taken before treatment (T1) and at the end of comprehensive treatment (T2). Mean treatment duration was 2.1 ± 0.4 years. The T1–T2 changes in the two groups were compared with Student’s t-tests for independent samples. Results:  The JJ group was successfully treated to a Class I occlusal relationship with a significant reduction in overjet (–3.9 mm, P &lt; .001) and overbite (–3.1 mm, P &lt; .001). The JJ group exhibited a significant increase in mandibular length and a significant improvement in maxillomandibular sagittal skeletal relationships. The lower incisors were significantly proclined, while the lower first molars demonstrated significant movement in a mesial direction. Conclusions:  Use of a modified JJ appliance and anterior bite plane is an effective protocol for the treatment of Class II malocclusion with increased overbite and greater skeletal (75%) than dentoalveolar (25%) effects mainly at the mandibular level.

scholarly journals Mandibular growth and dentoalveolar development in the treatment of Class II, division 1, malocclusion using Balters Bionator according to the skeletal maturation

2013 ◽  
Vol 18 (4) ◽  
pp. 43-52 ◽  
Author(s):  
Paulo Roberto dos Santos-Pinto ◽  
Lídia Parsekian Martins ◽  
Ary dos Santos-Pinto ◽  
Luiz Gonzaga Gandini Júnior ◽  
Dirceu Barnabé Raveli ◽  
...  
Keyword(s):  
Class Ii ◽  
Skeletal Maturation ◽  
Control Group ◽  
Mandibular Growth ◽  
Permanent Molar ◽  
Intergroup Comparison ◽  
Division 1 ◽  
Group 2 ◽  
Mandibular Base ◽  
Class Ii Division 1

OBJECTIVE: The purpose of the study was to evaluate the influence of the skeletal maturation in the mandibular and dentoalveolar growth and development during the Class II, division 1, malocclusion correction with Balters bionator. METHODS: Three groups of children with Class II, division 1, malocclusion were evaluated. Two of them were treated for one year with the bionator of Balters appliance in different skeletal ages (Group 1: 6 children, 7 to 8 years old and Group 2: 10 children, 9 to 10 years old) and the other one was followed without treatment (Control Group: 7 children, 8 to 9 years old). Lateral 45 degree cephalometric radiographs were used for the evaluation of the mandibular growth and dentoalveolar development. Tantalum metallic implants were used as fixed and stable references for radiograph superimposition and data acquisition. Student's t test was used in the statistical analysis of the displacement of the points in the condyle, ramus, mandibular base and dental points. Analysis of variance one-fixed criteria was used to evaluate group differences (95% of level of significance). RESULTS: The intragroup evaluation showed that all groups present significant skeletal growth for all points analyzed (1.2 to 3.7 mm), but in an intergroup comparison, the increment of the mandibular growth in the condyle, ramus and mandibular base were not statically different. For the dentoalveolar modifications, the less mature children showed greater labial inclination of the lower incisors (1.86 mm) and the most mature children showed greater first permanent molar extrusion (4.8 mm).

scholarly journals Mandibular Asymmetry in Different Occlusion Patterns

2007 ◽  
Vol 77 (5) ◽  
pp. 803-807 ◽  
Author(s):  
Omer Said Sezgin ◽  
Peruze Celenk ◽  
Selim Arici
Keyword(s):  
Class Ii ◽  
Asymmetry Index ◽  
Control Group ◽  
Class Iii ◽  
Mandibular Asymmetry ◽  
Normal Occlusion ◽  
Division 1 ◽  
Index Value ◽  
Age Range ◽  
Division 2

Abstract Objective: To investigate the effects of different occlusion types on the mandibular asymmetry in young individuals. Materials and Methods: Mandibular asymmetry measurements were performed on the panoramic radiographs of 189 subjects (104 females and 85 males; age range, 11–15 years), with different occlusion patterns. The subjects were divided into five groups according to the occlusion types, namely, Angle Class I (Cl I), Class II division 1 (Cl II/1), Class II division 2 (Cl II/2), Class III (Cl III), and normal occlusions. The Kruskal-Wallis test was used to determine the possible statistically significant differences between the groups for condyle, ramus, and condyle-plus-ramus asymmetry index measurements. Identified differences between groups were further analyzed using the Mann-Whitney U-test at the 95% confidence interval (P &lt; .05). Results: There were no statistically significant differences between male and female subjects. The Kruskal-Wallis test showed that the occlusion type had a significant effect on the condylar asymmetry. In Cl II/1 cases, condylar asymmetry values were significantly different from the values of Cl II/2 and Cl III malocclusion and normal occlusion types. The normal occlusion control group was significantly different from those of Cl II/1 and the Cl I malocclusion groups. Conclusion: Cl II/1 malocclusion has a significant effect on the condylar asymmetry index when compared to Cl II/2 and Cl III malocclusion and normal occlusion types. However, the mean condylar asymmetry index value in Cl II/1 malocclusion was not different from Cl I malocclusion.

scholarly journals Evaluation of tongue posture & dimensions in relation to skeletal Class I and Class II patterns- A cephalometric study

2021 ◽  
Vol 7 (4) ◽  
pp. 276-281
Author(s):  
Puja Khanna ◽  
Sumit Chhabra ◽  
Preeti Munjal ◽  
Sunny Mittal ◽  
Nishtha Arora
Keyword(s):  
Statistical Tests ◽  
Class Ii ◽  
Class I ◽  
Control Group ◽  
Skeletal Class ◽  
Normal Occlusion ◽  
Division 1 ◽  
Skeletal Pattern ◽  
Bonferroni Test ◽  
Class Ii Division 1

Association of tongue posture with dental and facial skeletal pattern have been suggested in past. This study was undertaken to assess tongue posture and dimensions in Class I and Class II Dentoskeletal patterns to determine whether any correlation exists between tongue posture and skeletal pattern of an individual. Cephalograms of 150 individuals (aged 18-23 years), taken in Natural Head Position (NHP) and tongue at rest were divided into three groups i.e. Group 1 – Class I Normal occlusion, Group 2 – Class II Division 1 Normodivergent and Group 3 – Class II Division 1 Hypodivergent, consisting of 50 samples each. To ensure the rest position of tongue, patient was asked to relax for 30 seconds after coating the tongue with barium sulphate in midline and then to swallow, and the X-ray was taken at the end of swallowing. Each group was divided into two subgroups according to sex. Groups were constituted according to the Frankfort mandibular plane angle (FMA) angle. The subjects who had skeletal Class II pattern due to mandibular retrusion and not due to maxillary prognathism were only included in the study group. Statistical analysis was done using the software SPSS version 21.0. The statistical tests used were unpaired t-test and One-way ANOVA test with post-hoc bonferroni test. The p-value was considered significant if less than 0.05.The dorsum of the tongue was higher at back and lower in front in Class II Division 1 Hypodivergent group as compared to Class I Normal occlusion group (P&#60;.05). Tongue height and tongue length were significantly reduced in Class II Division 1 Normodivergent and Class II Division 1 Hypodivergent malocclusion groups when compared to Class I control group (P&#60;.05).The study supports the existence of a relationship between posture & dimensions of the tongue with Class I and Class II skeletal patterns.

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