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.

scholarly journals Class II subdivision treatment with the Forsus Fatigue Resistant Device vs intermaxillary elastics

2016 ◽  
Vol 87 (3) ◽  
pp. 371-376 ◽  
Author(s):  
Isil Aras ◽  
Aylin Pasaoglu
Keyword(s):  
Treatment Phase ◽  
Class Ii ◽  
Occlusal Plane ◽  
Comprehensive Treatment ◽  
Fixed Appliance ◽  
Lateral Cephalograms ◽  
Significant Difference ◽  
Fixed Appliances ◽  
The Difference ◽  
Mandibular Incisors

ABSTRACT Objective: To compare the effectiveness of comprehensive fixed appliance treatments implemented in combination with Forsus or intermaxillary elastics in Class II subdivision subjects. Materials and Methods: Twenty-eight Class II subdivision patients were allocated to two groups using matched randomization: Forsus group (mean age, 14.19 ± 1.02 years) and elastics group (mean age, 13.75 ± 1.16 years). Patients received fixed appliance therapy in combination with either Forsus or intermaxillary elastics. The study was conducted on lateral cephalograms and digital models acquired before orthodontic treatment and 10–12 weeks after the fixed appliances were removed. Results: The treatment phase comprising the use of Forsus (4.53 ± 0.91 months) was significantly shorter compared with elastics application (6.85 ± 1.08 months). This was also true for comparing duration of overall comprehensive treatment in both groups. Extrusion and palatal tipping of maxillary incisors and clockwise rotation of the occlusal plane were greater in the elastics group (P < .05). The mandibular incisors were proclined in both groups (P < .001), but no significant difference was observed between groups (P > .05). The mandibular incisors showed intrusion in the Forsus group and extrusion in the elastics group; the difference between groups was significant (P < .05). Overbite was decreased in both groups (P < .001) in similar amounts. Improvement in overjet, mandibular midline deviation, and correction of molar relationship on the Class II side were greater in the Forsus group (P < .05). Conclusion: Forsus is more effective for correcting Class II subdivision malocclusion in a shorter treatment period with minimal patient compliance required.

scholarly journals Incisal and Soft Tissue Effects of Maxillary Premolar Extraction in Class II Treatment

2007 ◽  
Vol 77 (5) ◽  
pp. 808-816 ◽  
Author(s):  
Nevenka Tadic ◽  
Michael G. Woods
Keyword(s):  
Soft Tissue ◽  
Class Ii ◽  
Individual Response ◽  
Lower Lip ◽  
Fixed Appliance ◽  
Premolar Extraction ◽  
Class Ii Treatment ◽  
Nasolabial Angle ◽  
Lateral Cephalograms ◽  
Wide Range

Abstract Objective: This retrospective study was designed to show likely upper incisal and soft tissue lip changes accompanying Class II fixed appliance treatment with only two upper premolar extractions and to assess whether the lips, especially, are predictably and directly affected with such treatment. Materials and Methods: Pretreatment and posttreatment lateral cephalograms and study casts from 61 growing Class II patients (aged 11 to 18 years; 39 division 1 and 22 division 2) were assessed. Upper and lower lip curve depths, nasolabial angle, and upper incisal position and angulation were all assessed and compared with changes in other cephalometric variables. Results: A wide range of individual response in both lip and upper incisor behavior were noted. The observed soft tissue lip changes were most likely to be related to the preexisting morphology of the lips themselves, while upper incisal changes were mainly related to their own pretreatment positions and changes occurring with treatment in the underlying bony structures. Conclusion: Orthodontic treatment involving the extractions of only two upper premolars is likely to result in a wide range of variation in lip and upper incisor behavior. The preexisting soft tissue morphology is likely to be the greatest determinant of lip behavior.

scholarly journals Stability of Class II Malocclusion Treatment with the Austro Repositioner Followed by Fixed Appliances in Brachyfacial Patients

2021 ◽  
Vol 18 (18) ◽  
pp. 9793
Author(s):  
Maria Dolores Austro-Martinez ◽  
Ana I. Nicolas-Silvente ◽  
Eugenio Velasco-Ortega ◽  
Alvaro Jimenez-Guerra ◽  
Jose A. Alarcon
Keyword(s):  
Test Group ◽  
Class Ii ◽  
Control Group ◽  
Class Ii Malocclusion ◽  
Fixed Appliance ◽  
Skeletal Class ◽  
Skeletal Class Ii ◽  
Lateral Cephalograms ◽  
Fixed Appliances ◽  
One Year

One of the goals of functional-appliance devices is to modify the vertical growth pattern, solving several kinds of malocclusion. This study aimed to evaluate Class II malocclusion treatment’s stability with Austro Repositioner, followed by fixed appliances, and assess its capacity to modify vertical dimensions in brachyfacial patients. A test group of 30 patients (16 boys and 14 girls, mean 11.9 years old) with Class II malocclusion due to mandibular retrognathism and brachyfacial pattern treated with Austro Repositioner and fixed appliance were compared to a matched untreated Class II control group of 30 patients (17 boys and 13 girls, mean age 11.7 years old). Lateral cephalograms were taken at T1 (initial records), T2 (end of treatment), and T3 (one year after treatment). Statistical comparisons were performed with a paired-sample t-test and two-sample t-tests. Significant improvements in the skeletal Class II relationship were observed in the treated group. The ANB angle decreased (4.75°), the SNB angle increased (3.92°), and the total mandibular length (Co-Pg) increased (8.18 mm) (p < 0.001). Vertical dimensions were also significantly modified, the FMA angle increased (3.94°), LAFH-distance increased (3.15 mm), and overbite decreased (3.35 mm). These changes remained stable one year after treatment. The Austro Repositioner was adequate for treating the skeletal Class II malocclusion resulting from the mandible retrusion in brachyfacial patients.

scholarly journals Long-term skeletal and dental effects and treatment timing for functional appliances in Class II malocclusion

2012 ◽  
Vol 83 (2) ◽  
pp. 334-340 ◽  
Author(s):  
Lorenzo Franchi ◽  
Chiara Pavoni ◽  
Kurt Faltin ◽  
James A. McNamara ◽  
Paola Cozza
Keyword(s):  
Treatment Group ◽  
Class Ii ◽  
Control Group ◽  
Class Ii Malocclusion ◽  
Treatment Timing ◽  
Class Ii Treatment ◽  
Lateral Cephalograms ◽  
Functional Appliances ◽  
Fixed Appliances

ABSTRACT Objective: To analyze the long-term skeletal and dentoalveolar effects and to evaluate treatment timing of Class II treatment with functional appliances followed by fixed appliances. Materials and Methods: A group of 40 patients (22 females and 18 males) with Class II malocclusion consecutively treated either with a Bionator or an Activator followed by fixed appliances was compared with a control group of 20 subjects (9 females and 11 males) with untreated Class II malocclusion. Lateral cephalograms were available at the start of treatment (mean age 10 years), end of treatment with functional appliances (mean age 12 years), and long-term observation (mean age 18.6 years). The treated sample also was divided into two groups according to skeletal maturity. The early-treatment group was composed of 20 subjects (12 females and 8 males) treated before puberty, while the late-treatment group included 20 subjects (10 females and 10 males) treated at puberty. Statistical comparisons were performed with analysis of variance followed by Tukey's post hoc tests. Results: Significant long-term mandibular changes (Co-Gn) in the treated group (3.6 mm over the controls) were associated with improvements in the skeletal sagittal intermaxillary relationship, overjet, and molar relationship (∼3.0–3.5 mm). Treatment during the pubertal peak was able to produce significantly greater increases in total mandibular length (4.3 mm) and mandibular ramus height (3.1 mm) associated with a significant advancement of the bony chin (3.9 mm) when compared with treatment before puberty. Conclusion: Treatment of Class II malocclusion with functional appliances appears to be more effective at puberty.

Teeth angulations after class II treatment with the Jones Jig followed by fixed appliances: A retrospective panoramic analysis

2020 ◽  
Vol 18 (3) ◽  
pp. 436-442
Author(s):  
Silvio Augusto Bellini-Pereira ◽  
Gabriel Querobim Sant’Anna ◽  
Maria Claudia Wagner ◽  
Aron Aliaga-DelCastillo ◽  
Mayara Paim Patel ◽  
...  
Keyword(s):  
Class Ii ◽  
Class Ii Treatment ◽  
Panoramic Analysis ◽  
Fixed Appliances

scholarly journals Dental and skeletal changes in patients with mandibular retrognathism following treatment with Herbst and pre-adjusted fixed appliance

2014 ◽  
Vol 19 (1) ◽  
pp. 46-54 ◽  
Author(s):  
Fabio de Abreu Vigorito ◽  
Gladys Cristina Dominguez ◽  
Luís Antônio de Arruda Aidar
Keyword(s):  
Phase I ◽  
Phase Ii ◽  
Class Ii ◽  
Initial Position ◽  
Occlusal Plane ◽  
Mandibular Movement ◽  
Fixed Appliance ◽  
Lateral Cephalograms ◽  
T1 And T2 ◽  
Mandibular Retrognathism

OBJECTIVE: To assess the dentoskeletal changes observed in treatment of Class II, division 1 malocclusion patients with mandibular retrognathism. Treatment was performed with the Herbst orthopedic appliance during 13 months (phase I) and pre-adjusted orthodontic fixed appliance (phase II). METHODS: Lateral cephalograms of 17 adolescents were taken in phase I onset (T1) and completion (T2); in the first thirteen months of phase II (T3) and in phase II completion (T4). Differences among the cephalometric variables were statistically analyzed (Bonferroni variance and multiple comparisons). RESULTS: From T1 to T4, 42% of overall maxillary growth was observed between T1 and T2 (P < 0.01), 40.3% between T2 and T3 (P < 0.05) and 17.7% between T3 and T4 (n.s.). As for overall mandibular movement, 48.2% was observed between T1 and T2 (P < 0.001) and 51.8% between T2 and T4 (P < 0.01) of which 15.1% was observed between T2 and T3 (n.s.) and 36.7% between T3 and T4 (P < 0.01). Class II molar relationship and overjet were properly corrected. The occlusal plane which rotated clockwise between T1 and T2, returned to its initial position between T2 and T3 remaining stable until T4. The mandibular plane inclination did not change at any time during treatment. CONCLUSION: Mandibular growth was significantly greater in comparison to maxillary, allowing sagittal maxillomandibular adjustment. The dentoalveolar changes (upper molar) that overcorrected the malocclusion in phase I, partially recurred in phase II, but did not hinder correction of the malocclusion. Facial type was preserved.

scholarly journals Stability of Class II treatment with the Bionator followed by fixed appliances

2013 ◽  
Vol 21 (6) ◽  
pp. 547-553 ◽  
Author(s):  
Manoela Favaro FRANCISCONI ◽  
Jose Fernando Castanha HENRIQUES ◽  
Guilherme JANSON ◽  
Karina Maria Salvatore de FREITAS ◽  
Patricia Bittencourt Dutra dos SANTOS
Keyword(s):  
Class Ii ◽  
Class Ii Treatment ◽  
Fixed Appliances

scholarly journals Cephalometric appraisal of Class II treatment effects after functional and fixed appliances: a retrospective study

2016 ◽  
pp. cjw064 ◽  
Author(s):  
Aurelia Zelderloo ◽  
Maria Cadenas de Llano-Pérula ◽  
Anna Verdonck ◽  
Steffen Fieuws ◽  
Guy Willems
Keyword(s):  
Retrospective Study ◽  
Treatment Effects ◽  
Class Ii ◽  
Class Ii Treatment ◽  
Fixed Appliances

scholarly journals Comparison of the effects of rapid maxillary expansion versus Twin Block appliance on mandibular growth in skeletal Class II patients

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Jia-Nan Zhang ◽  
Si Chen ◽  
Cheng-Yi Huang ◽  
Chong Zhong ◽  
Jing Jin ◽  
...  
Keyword(s):  
Class Ii ◽  
Rapid Maxillary Expansion ◽  
Maxillary Expansion ◽  
Fixed Appliance ◽  
Mandibular Growth ◽  
Twin Block ◽  
Skeletal Class ◽  
Skeletal Changes ◽  
Skeletal Class Ii ◽  
Growth Changes

Abstract Background This is a retrospective study that compares mandibular growth changes in skeletal Class II patients treated by rapid maxillary expansion (RME) and following fixed appliance with those patients treated by Twin-Block (TB) and following fixed appliance. Methods Fourteen patients treated by RME and following fixed appliance were included into the RME group. Fifteen patients treated by Twin-Block and following fixed appliance were included into the TB group. Lateral cephalometric radiographs taken before treatment and immediately after fixed appliance treatment were used to evaluate mandibular growth effects. Results The starting forms of the patients in the two groups were examined to be of good comparability. The mandibular length increased significantly in both groups as measured by Co-Gn, Go-Gn and Ar-Gn, but the TB group didn’t show more mandibular growth than the RME group (P > 0.05). Skeletal changes of the mandible in vertical dimension were different in the two groups. The change in FMA was 0.35° in the RME group, while the change was 2.65° in the TB group (P < 0.001). The change in LAFH was 5.14 mm in the RME group, significantly smaller than the change of 10.19 mm in the TB group (P < 0.001). Conclusion The investigated Phase I treatment with RME followed by Phase II treatment of fixed appliance achieved the same increases in sagittal mandibular growth and facial profile improvements as the Twin-Block therapy. The treatment with RME followed by fixed appliance was better for vertical control, while the treatment with Twin-Block followed by fixed appliance significantly increased the mandibular plane angle.

scholarly journals Long-term evaluation of the molar movements following Pendulum and fixed appliances

2012 ◽  
Vol 83 (3) ◽  
pp. 447-454 ◽  
Author(s):  
Alberto Caprioglio ◽  
Mattia Fontana ◽  
Elena Longoni ◽  
Mauro Cozzani
Keyword(s):  
Class Ii ◽  
Individual Growth ◽  
Fixed Appliance ◽  
Skeletal Changes ◽  
Growth Increase ◽  
Lateral Cephalograms ◽  
Significant Difference ◽  
Term Evaluation ◽  
Long Term Observation

ABSTRACT Objective: To describe the molar movements and skeletal changes associated with Pendulum-fixed appliance treatment and the long-term postretention period. Subjects and Methods: The treatment sample consisted of 76 Class II patients, 35 males and 41 females. Lateral cephalograms were obtained at the start of treatment (T1); the end of distalization (T2); the end of orthodontic fixed appliance therapy (T3); and long-term observation (7 years 2 months later; T4). Mean age was 12 years 11 months at T1, 13 years 8 months at T2, 15 years 4 months at T3, and 22 years 5 months at T4. The average amount of Class II molar relationship was 3.1 mm, with a mean overjet of 5.9 mm at the beginning of treatment. A paired t-test was used to identify significant between-group differences between T2–T4 and T3–T4. Results: Distal molar movement was obtained during the distalization phase (T2), and more than half of the distalizing effect was maintained at the end of maxillary growth (T4). Most of the relapse occurred during fixed appliance therapy (T3), whereas no significant change was detected in the postretention period (T4). The molar relationship did not show any significant difference between T2 and T4. The vertical facial dimension increased during the distalization phase (T2) and fixed appliance therapy (T3) but returned to the initial values during the postretention period (T4). Conclusions: The Pendulum appliance induces significant dentoalveolar effects, which can be partially maintained during the long-term period. The Class I molar relationship does not change during completion of individual growth. Increase in vertical facial dimension represents a temporary effect.

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