scholarly journals Stability evaluation of occlusal changes obtained with Fränkel's Function Regulator-2

2012 ◽  
Vol 17 (6) ◽  
pp. 103-110
Author(s):  
Tânia Gnecchi Tanaka ◽  
Fernanda Angelieri ◽  
Lylian Kazumi Kanashiro ◽  
Silvana Bommarito
Keyword(s):  
Class Ii ◽  
Post Treatment ◽  
Class Ii Malocclusion ◽  
Final Phase ◽  
Division 1 ◽  
Treatment Priority ◽  
Function Regulator ◽  
Student’S T ◽  
The Stability ◽  
Student’S T Test

OBJECTIVE: To analyze the stability of occlusal changes promoted by the Frankel's Functional Regulator 2 (FR-2), in a mean period of 7.16 years post treatment. METHODS: Fifty-four pairs of models were evaluated, from 18 patients treated with FR-2. All patients had Class II, division 1 malocclusion, with initial mean age of 10.77 years and were treated with FR-2 for 18 months. The models were evaluated at the beginning of treatment (T1), at the end (T2) and after 7.16 years post treatment (T3). For occlusal evaluation, the treatment priority index (TPI) was applied on the three analyzed phases. The alterations that occurred between phases were verified with one another through paired Student's t test, with critical value of 0.05. RESULTS: A statistically significant reduction of TPI was verified, from the initial to the final phase of the treatment, reflecting the efficiency of treatment performed with FR-2, specially due to improvement in molar relation, overjet and overbite. Apart from this, the Class II correction remained stable over time. CONCLUSIONS: In this way, it is concluded that the FR-2 appliance showed to be efficient for the dental correction of Class II malocclusion, with stable occlusal results after 7.16 years post treatment.

scholarly journals Patients with Class II Malocclusion: Cephalometric analysis in the Tegumentary Profile

2009 ◽  
Vol 8 (3) ◽  
pp. 497-502
Author(s):  
Sandra Kalil Bussadori ◽  
Carlos Eduardo Bugano de Oliveira ◽  
Carolina Cardoso Guedes ◽  
Kristianne Porta Fernandes ◽  
Analúcia Ferreira Marangoni ◽  
...  
Keyword(s):  
Class Ii ◽  
T Test ◽  
Cephalometric Analysis ◽  
Class Ii Malocclusion ◽  
Upper Lip ◽  
Lower Lip ◽  
Group I ◽  
Student’S T ◽  
Level Of Significance ◽  
Student’S T Test

The aim of the study was to assess cephalometric abnormalities in the tegumentary profile of patients with Class II malocclusion. Twenty patients with average age of seven years and eight months were divided into: Group I - control, Class I, no malocclusions (n=10); Group II – Class II malocclusion (n=10). Standardized radiography was performed for the obtainment of the cephalometric points. Langlade’s classification was employed and the features were used: GN.Sn.Pog, ANL,A´-Gv, Pog´- Gv, Ls-GV, Li-GV, Sls-Gv, Sli-Gv. The Student’s t-test and Pearson’s correlation were used, with the level of significance set at 5%. The results show that the patients with Class II had more convex tegumentary profile, less protruded mid face and upper lip, less depth of the upper lip groove and more retracted lower lip and tegumentary chin, with statistically significant differences between groups (p0.005). The conclusion is that the patients with Class II malocclusion exhibited cephalometric abnormalities in the tegumentary profile.

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 < .001) and overbite (–3.1 mm, P < .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 Comparison between direct vs indirect anchorage in two miniscrew-supported distalizing devices

2016 ◽  
Vol 86 (3) ◽  
pp. 399-406 ◽  
Author(s):  
Mauro Cozzani ◽  
Mattia Fontana ◽  
Giuliano Maino ◽  
Giovanna Maino ◽  
Lucia Palpacelli ◽  
...  
Keyword(s):  
Treatment Time ◽  
Class Ii ◽  
T Test ◽  
Class Ii Malocclusion ◽  
Lateral Cephalograms ◽  
Treatment Changes ◽  
The Mean ◽  
T1 And T2 ◽  
Student’S T ◽  
Student’S T Test

ABSTRACT Objective:  To compare two distalizing devices supported by palatal miniscrews, the MGBM System (MGBM) and the Distal Screw appliance (DS), in dental Class II patients. Materials and Methods:  Pretreatment (T1) and postdistalization (T2) lateral cephalograms of 53 Class II malocclusion subjects were examined. MGBM consisted of 29 patients (16 males, 13 females) with a mean pretreatment age of 12.3 ± 1.5 years; DS consisted of 24 patients (11 males, 13 females) with a mean pretreatment age of 11.3 ± 1.2 years. The mean distalization time was 6 ± 2 months for MGBM and 9 ± 2 months for DS. Initial and final measurements and treatment changes were compared by means of a Student’s t-test. Results:  Maxillary superimpositions showed that the maxillary first molar distalized an average of 5.5 mm in the MGBM and 3.2 mm in the DS between T1 and T2; distal molar tipping was greater in the MGBM (10.3°) than in the DS (3.0°). First premolar showed a mean mesial movement of 1.4 mm, with a mesial tipping of 4.4° in the MGBM; on the contrary, first premolar showed a distal movement of 2.2 mm, with a distal tipping of 6.2°, in the DS. Conclusions:  The MGBM system resulted in greater distal molar movement and less treatment time, resulting in more efficient movement than was associated with the DS; DS showed less molar tipping during distalization.

scholarly journals Dentoskeletal effects of Twin Block appliance in patients with Class II malocclusion

2021 ◽  
Author(s):  
Mahamad Irfanulla Khan ◽  
Praveen Kumar Neela ◽  
Nayeem Unnisa ◽  
Ajit Kumar Jaiswal ◽  
Nadeem Ahmed ◽  
...  
Keyword(s):  
Class Ii ◽  
Post Treatment ◽  
Control Group ◽  
Class Ii Malocclusion ◽  
Mandibular Growth ◽  
Twin Block ◽  
Lateral Cephalograms ◽  
Division 1 ◽  
Pre Treatment ◽  
Class Ii Division 1

Background and aim. Class II malocclusions are most commonly seen in orthodontic practice and in the recent times Twin Block appliance has been the most popular and widely used among removable functional appliances for the correction of Class II malocclusion in growing patients. The aim of this retrospective study was to evaluate the dentoskeletal effects produced by the Twin Block appliance for the correction of Class II division 1 malocclusion with retrognathic mandible. Methods. Pre-treatment (T1) and post-treatment (T2) lateral cephalograms of 30 patients treated with Twin Block appliance (mean age  =  10.8 ± 1.2 years) for the correction of class II division 1 malocclusion were compared with the 30 untreated class II control patients (mean age 11.2 ± 0.8 years) who did not undergo any treatment during this period. Both the groups were evaluated for the dentoskeletal changes using 24 angular and linear cephalometric measurements. The differences between the pre and post-treatment were calculated using a paired t-test. Results. The cephalometric analysis revealed that the Twin Block appliance stimulated mandibular growth and statistically significant differences were found between the two groups. Twin Block patients showed a statistically very high significant (p<0.001) increase in mandibular length (6.02 mm) compared with the control group (0.3 mm). ‘Headgear effect’ on the maxilla, increase in lower anterior facial height, significant reduction of overjet, overbite and Class I molar relationship was achieved in the Twin Block group. However, no significant changes appeared in the control group. Conclusion: The results of the present study conclude that the Twin Block appliance is effective in the treatment of Class II malocclusion and this is due to a combination of skeletal and dentoalveolar changes in both the arches.

Comparative Dentoskeletal Study of Class II Division 1 and Class II Division 2 Malocclusion Subjects

2011 ◽  
Vol 1 (1) ◽  
pp. 36-41
Author(s):  
Jyoti Dhakal
Keyword(s):  
Class Ii ◽  
Class Ii Malocclusion ◽  
Basic Difference ◽  
Cephalometric Radiograph ◽  
Significant Difference ◽  
Division 1 ◽  
Dentoskeletal Morphology ◽  
Division 2 ◽  
Dental Cast ◽  
Class Ii Division 1

The dentoskeletal characteristics of Class II malocclusion subjects were evaluated using cephalometric radiograph and dental cast of 60 untreated patients. The sample included 30 Class II Division 1 and 30 Class II Division 2 malocclusion patients. The inter-canine, inter-premolar, inter-molar, inter-canine alveolar, inter-premolar alveolar, inter-molar alveolar widths are measured on study models. The result showed statistically significant difference between the groups for mandibular inter-canine width only. The cephalometric analysis revealed that SNB angle was responsible for the skeletal sagittal difference between the two groups except for the position of maxillary incisors. No basic difference in dentoskeletal morphology existed between Class II Division 1 and Class II Division 2 malocclusions.

scholarly journals Class II Division 1 malocclusion treatment using TADs: Case report

2020 ◽  
Vol 67 (3) ◽  
pp. 159-164
Author(s):  
Tina Pajevic ◽  
Jovana Juloski ◽  
Marija Zivkovic
Keyword(s):  
Case Report ◽  
Orthodontic Treatment ◽  
Class Ii ◽  
Dental Arch ◽  
Class Ii Malocclusion ◽  
Posterior Teeth ◽  
Temporary Anchorage Devices ◽  
Division 1 ◽  
Incisor Retraction ◽  
Class Ii Division 1

Introduction. Orthodontic treatment of Class II Division 1 (II/1) malocclusions in adults can be challenging since skeletal effects are limited. Possible treatment options are orthodontic camouflage or orthognatic surgery, in severe cases. The aim of this paper was to present a successful management of Class II malocclusion in an adult patient using temporary anchorage devices (TADs). Case report. After detailed clinical examination, study models and cephalometric analysis, a 26 years old patient was diagnosed with Class II malocclusion, an overjet of 12 mm, congenitally missing tooth 41 and midline shifted to the right in upper dental arch. In prior orthodontic treatment, patient had upper premolars extracted. Posterior teeth in upper left quadrant were shifted mesially. The camouflage treatment was considered, using temporary anchorage devices (TADs) to distalize posterior teeth on the left side, and gain space for incisor retraction and midline correction in upper dental arch. Results. Using TADs as additional anchorage in anterior region and coil spring for molar distalization, the space was made for tooth 23, midline correction and incisor retraction. After 40 months, a satisfactory result was achieved, overjet and midline correction, class I canines occlusion and class II molar occlusion. Conclusion. Class II/1 malocclusion in adults can be successfully treated using TADs. The success depends on the severity of malocclusion and patient cooperation.

scholarly journals Effects of the cervical headgear in growing Angle Class II malocclusion patients: a prospective study

2020 ◽  
Vol 25 (2) ◽  
pp. 25-31
Author(s):  
Anderson Jaña Rosa ◽  
Rizomar Ramos do Nascimento ◽  
José Nelson Mucha ◽  
Oswaldo de Vasconcellos Vilella
Keyword(s):  
Significant Variation ◽  
Class Ii ◽  
Control Group ◽  
Class Ii Malocclusion ◽  
Angle Class Ii ◽  
Skeletal Changes ◽  
Division 1 ◽  
A Prospective Study ◽  
Untreated Individuals ◽  
Experimental Group

ABSTRACT Objective: Evaluate dental and skeletal changes resulting from the exclusive use of the cervical headgear for 15 ± 4 months in the treatment of patients with Class II division 1 malocclusion. Methods: Differences between the beginning (T1) and immediately after the end of the therapy (T2) with the cervical headgear in growing patients (Experimental Group, EG, n = 23) were examined and compared, during compatible periods, with those presented by a group of untreated individuals (Control Group, CG, n =22) with similar malocclusions and chronological age. The cephalometric variables evaluated were: ANB, GoGn.SN, AO-BO, S'-ANS, S'-A, S'-B, S'-Pog and S'-U6 (maxillary first molar). The Shapiro-Wilk and Levene tests were used to evaluate the results. Results: Significant differences were found relative to the ANB, S'-U6, AO-BO, S'-ANS, S'-A, S'-B and S'-Pog variables between T1 and T2 when comparing both groups. No statistically significant variation was found regarding the GoGn.SN angle. Conclusions: The use of cervical headgear promoted distal movement of the maxillary first molars and restricted the anterior displacement of the maxilla, without significantly affecting the GoGn.SN angle.

scholarly journals Correlation between the Rotation of the First Molars and the Severity of Class II Division 1 Malocclusion

2015 ◽  
Vol 2015 ◽  
pp. 1-5
Author(s):  
Betânia Pessoa Lima ◽  
Célia Regina Maio Pinzan-Vercelino ◽  
Laércio Santos Dias ◽  
Fausto Silva Bramante ◽  
Rudys Rodolfo De Jesus Tavarez
Keyword(s):  
Class Ii ◽  
Class Ii Malocclusion ◽  
Complete Class ◽  
Positive Correlation ◽  
Group 4 ◽  
Division 1 ◽  
Group 3 ◽  
Scanned Images ◽  
Group 2 ◽  
Class Ii Division 1

This study aimed to evaluate the potential correlation between the severity of Class II division 1 malocclusion and the magnitude of mesiopalatal rotation of the maxillary first molars. Scanned images of 104 cast models were grouped according to the severity of Class II malocclusion as follows: Group 1, 1/4 Class II malocclusion; Group 2, 1/2 Class II malocclusion; Group 3, 3/4 Class II malocclusion; and Group 4, complete Class II malocclusion. The rotation was measured using parameters described by Henry, Friel, and Ricketts, referred to as indicators 1, 2, and 3, respectively. The correlation was evaluated using the Spearman’s correlation coefficient. The rotational indicators were compared using one-way analysis of variance. For all statistical analyses usedp<0.05, a positive correlation was observed between the severity of Class II malocclusion and the mesiopalatal rotation of the maxillary first molar. This correlation was statistically significant for indicator 1 between Groups 1 and 3 and for indicator 2 between Groups 1 and 4, which include cases of extreme malocclusion. In conclusion, there is a positive correlation between the severity of Class II division 1 malocclusion and the magnitude of mesiopalatal rotation in the maxillary first molars.

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