scholarly journals Long-term stability of miniscrew anchored maxillary molar distalization in Class II treatment

2020 ◽  
Vol 90 (3) ◽  
pp. 362-368 ◽  
Author(s):  
Till Edward Bechtold ◽  
Young-Chel Park ◽  
Kyung-Ho Kim ◽  
Heekyu Jung ◽  
Ju-Young Kang ◽  
...  
Keyword(s):  
Class Ii ◽  
Vertical Movement ◽  
Occlusal Plane ◽  
Control Group ◽  
Long Term Stability ◽  
Class Ii Treatment ◽  
Lateral Cephalograms ◽  
Maxillary Molar ◽  
Group A

ABSTRACT Objective To investigate treatment stability of miniscrew-anchored maxillary distalization in Class II malocclusion. Materials and Methods This retrospective study included a distalization (n = 19) and a control (n = 19) group; a patient group with minor corrections served the control. Lateral cephalograms of 38 adult patients were taken before (T0), immediately after (T1), and 3–4 years after (T2) treatment. Horizontal and vertical movement and tipping of the maxillary first molars (U6) and central incisors (U1) were measured along with skeletal craniofacial parameters at three time points to compare the two groups regarding the achieved treatment effects and their stability. Results Total arch distalization therapy led to 4.2 mm of distal movement of U6 without distal crown tipping (0.6° of axis change) and 3.3° of occlusal plane steepening. Over an average retention period of 42 months, maxillary total arch distalization provided high stability of treatment results, showing the same amount of mesial movement (0.7 mm) as the control group. Conclusions In Class II treatment, miniscrew-anchored maxillary total arch distalization can provide stable distal movement of the maxillary first molars and central incisors.

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.

Class II treatment in early mixed dentition with the eruption guidance appliance: effects and long-term stability

2019 ◽  
Vol 42 (2) ◽  
pp. 151-156 ◽  
Author(s):  
Katri Keski-Nisula ◽  
Leo Keski-Nisula ◽  
Juha Varrela
Keyword(s):  
Treatment Group ◽  
Class Ii ◽  
Post Treatment ◽  
Mixed Dentition ◽  
Term Stability ◽  
Long Term Stability ◽  
Class Ii Treatment ◽  
Significant Correction ◽  
The Mean

Summary Objectives Our aim was to analyse dentoskeletal effects and long-term stability of Class II treatment carried out with an eruption guidance appliance (EGA) in early mixed dentition. Materials and methods Sixty-five Class II patients (38 females and 27 males), treated with an EGA in early mixed dentition, were compared with 58 children (26 females and 32 males) with untreated Class II malocclusion. The mean age in the treatment group at the start (T1) and end of treatment (T2) was 5.4 years (±0.4) and 8.5 years (±0.9), respectively, and at the final examination in the early permanent dentition (T3) 16.7 years (±0.4). In the control group, the mean age at T1 and T2 were 5.1 years (±0.5) and 8.4 years (±0.5), respectively. The independent and dependent sample t-tests, Chi-square test, and Fisher’s test were used in the statistical evaluation. Results In the treatment group, the frequency of Class II decreased from 100 to 14% during the treatment (T1–T2) and a significant correction took place in all occlusal variables. At T2, the treatment and control groups showed statistically significant differences (P < 0.05) in all occlusal variables. In the treated children, mandibular length increased 5 mm more (P < 0.001) from T1 to T2 compared to the control children, and the ANB angle became significantly smaller (P = 0.006). During the post-treatment period (T2–T3), the frequency of Class II in the treatment group decreased from 14 to 2% (P < 0.05), overbite increased from 2.2 to 3.1 mm (P < 0.05), and lower crowding increased from 2to 14% (P < 0.05). Post-treatment changes in overjet and upper crowding were not statistically significant. At T3, the mean values of the SNA, SNB, and ANB angles were 83.0° (SD 3.9°), 81.3° (SD 3.8°), and 2.4° (SD 1.5°), respectively. Conclusions A clinically significant correction of the molar relationship, overjet, overbite, incisor alignment, and growth enhancement of the mandible were observed after treatment in early mixed dentition. The treatment results remained largely stable in the early permanent dentition. However, an increase was observed in overbite and lower crowding. None of the children treated in early mixed dentition needed a second treatment phase.

scholarly journals Evaluation of long-term stability of mesiodistal axial inclinations of maxillary molars through panoramic radiographs in subjects treated with Pendulum appliance

2016 ◽  
Vol 21 (1) ◽  
pp. 67-74 ◽  
Author(s):  
Caroline Andrade Rocha ◽  
Renato Rodrigues de Almeida ◽  
José Fernando Castanha Henriques ◽  
Carlos Flores-Mir ◽  
Marcio Rodrigues de Almeida
Keyword(s):  
Panoramic Radiograph ◽  
Post Treatment ◽  
Control Group ◽  
Long Term Stability ◽  
Maxillary Molars ◽  
Group Data ◽  
Maxillary Molar ◽  
Pendulum Appliance ◽  
The Stability

Objective: To evaluate the stability of mesiodistal inclination of maxillary molars produced by a pendulum appliance, five years after completion of orthodontic treatment. Angulation changes were compared to an untreated sample. Methods: The sample consisted of 20 patients (14 females and 6 males) with Class II, Division 1 malocclusion that was treated through molar distalization with a pendulum appliance followed by cervical headgear and full fixed appliances. Maxillary molar inclination was evaluated through panoramic radiograph. The mean age at pretreatment was 14.3 ± 1.6 years, whereas at immediate post-treatment it was 18.6 ± 1.8 years, and at long-term post-treatment it was 23.8 ± 2.0 years. A control group of 16 untreated individuals with untreated normocclusion ranging in age from 12 to 17 years old were used as comparison group. Data were statistically analyzed with independent t-tests and ANOVA test followed by Tukey post-hoc tests. Results: Statistically significant differences were found between T1 (94.50) and T2 (98.80) as well as between T2 and T3 (94.70) for maxillary first molars. Maxillary second molars did not show any statistically significant positional changes during the evaluated time periods T1 (107.50), T2 (109.30) and T3 (106.90). Conclusion: Although maxillary first molars underwent distal crown inclination immediately after treatment, approximately five years thereafter their roots tended to upright close to the pretreatment positions.

Long-term stability of Class II treatment with the Jasper jumper appliance

2017 ◽  
Vol 152 (5) ◽  
pp. 663-671 ◽  
Author(s):  
Camilla Fiedler Foncatti ◽  
José Fernando Castanha Henriques ◽  
Guilherme Janson ◽  
Waleska Caldas ◽  
Daniela Gamba Garib
Keyword(s):  
Class Ii ◽  
Term Stability ◽  
Long Term Stability ◽  
Class Ii Treatment

scholarly journals Morphometric analysis of long-term dentoskeletal effects induced by treatment with Balters bionator

2014 ◽  
Vol 85 (5) ◽  
pp. 790-798 ◽  
Author(s):  
Renato Bigliazzi ◽  
Lorenzo Franchi ◽  
André Pinheiro de Magalhães Bertoz ◽  
James A. McNamara ◽  
Kurt Faltin ◽  
...  
Keyword(s):  
Class Ii ◽  
Control Group ◽  
Class Ii Malocclusion ◽  
Long Term Effects ◽  
Lateral Cephalograms ◽  
Long Term Follow Up ◽  
Long Term Observation ◽  
Mandibular Retrusion ◽  
Shape Changes

ABSTRACT Objective:  To evaluate the long-term effects of the standard (Class II) Balters bionator in growing patients with Class II malocclusion with mandibular retrusion by using morphometrics (thin-plate spline [TPS] analysis). Materials and Methods:  Twenty-three Class II patients (8 male, 15 female) were treated consecutively with the Balters bionator (bionator group). The sample was evaluated at T0, start of treatment; T1, end of bionator therapy; and T2, long-term observation (including fixed appliances). Mean age at the start of treatment was 10 years 2 months (T0); at posttreatment, 12 years 3 months (T1); and at long-term follow-up, 18 years 2 months (T2). The control group consisted of 22 subjects (11 male, 11 female) with untreated Class II malocclusion. Lateral cephalograms were analyzed at the three time points for all groups. TPS analysis evaluated statistical differences (permutation tests) in the craniofacial shape and size between the bionator and control groups. Results:  TPS analysis showed that treatment with the bionator is able to produce favorable mandibular shape changes (forward and downward displacement) that contribute significantly to the correction of the Class II dentoskeletal imbalance. These results are maintained at a long-term observation after completion of growth. The control group showed no statistically significant differences in the correction of Class II malocclusion. Conclusions:  This study suggests that bionator treatment of Class II malocclusion produces favorable results over the long term with a combination of skeletal and dentoalveolar shape changes.

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.

Efficacy of corticosteroid therapy in the treatment of long- lasting olfactory disorders in COVID-19 patients

2020 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
L.A. Vaira ◽  
C. Hopkins ◽  
M. Petrocelli ◽  
J.R. Lechien ◽  
S. Cutrupi ◽  
...  
Keyword(s):  
Treatment Group ◽  
Case Control Study ◽  
Spontaneous Recovery ◽  
Olfactory Function ◽  
Control Group ◽  
Initial Control ◽  
Group A ◽  
Control Study

BACKGROUND: The growing number of COVID-19 patients with long-lasting olfactory disorders makes it necessary to identify effective treatments that enhance the spontaneous recovery of olfactory function. METHODS: Multicentre randomised case-control study that involved 18 patients with COVID-19 related anosmia or severe hyposmia for more than 30 days. Nine patients were prescribed systemic prednisone and nasal irrigation with betamethasone, ambroxol and rinazine for 15 days. The other 9, untreated, patients were used as controls. The olfactory function was evaluated with CCCRC test at 20 and 40 days from the first evaluation. RESULTS: In the control group, a median olfactory score of 20 (IQR 30) was detected at baseline. At the 20-day control there was no significant improvement in olfactory function. The improvement in olfactory performance became significant at the 40-day follow-up compared to baseline scores [60 (IQR 60) versus 20 (IQR 30)]. In the treatment group, patients had a mean olfactory score of 10 (IQR 15) at initial control. At the 20-day control, a significant im-provement in the olfactory scores, compared to the baseline, was detected [70 (IQR 40) versus 10 (IQR 15)]. Olfactory function further improved at 40 days [median score 90 (IQR 50)]. Patients in the treatment group reported significantly higher improvements of the olfactory scores than the controls at both the 20-day [40 (IQR 45) versus 10 (IQR 15)] and 40-day [60 (IQR 40) versus 30 (IQR 25)] evaluations. CONCLUSIONS: Based on the results of this study, the mix of drugs including steroids could represent a useful specific therapy to reduce the prevalence of this long-term morbidity.

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 Long-term skeletal effects of high-pull headgear followed by fixed appliances for the treatment of Class II malocclusions

2018 ◽  
Vol 88 (5) ◽  
pp. 530-537
Author(s):  
E. Erin Bilbo ◽  
Steven D. Marshall ◽  
Karin A. Southard ◽  
Verrasathpurush Allareddy ◽  
Nathan Holton ◽  
...  
Keyword(s):  
Class Ii ◽  
Class I ◽  
Control Group ◽  
Orthodontic Appliances ◽  
Skeletal Changes ◽  
Fixed Orthodontic Appliances ◽  
Horizontal Growth ◽  
Skeletal Effects ◽  
Fixed Appliances

ABSTRACT Objectives: The long-term skeletal effects of Class II treatment in growing individuals using high-pull facebow headgear and fixed edgewise appliances have not been reported. The purpose of this study was to evaluate the long-term skeletal effects of treatment using high-pull headgear followed by fixed orthodontic appliances compared to an untreated control group. Materials and Methods: Changes in anteroposterior and vertical cephalometric measurements of 42 Class II subjects (n = 21, mean age = 10.7 years) before treatment, after headgear correction to Class I molar relationship, after treatment with fixed appliances, and after long-term retention (mean 4.1 years), were compared to similar changes in a matched control group (n = 21, mean age = 10.9 years) by multivariable linear regression models. Results: Compared to control, the study group displayed significant long-term horizontal restriction of A-point (SNA = −1.925°, P &lt; .0001; FH-NA = −3.042°, P &lt; .0001; linear measurement A-point to Vertical Reference = −3.859 mm, P &lt; .0001) and reduction of the ANB angle (−1.767°, P &lt; .0001), with no effect on mandibular horizontal growth or maxillary and mandibular vertical skeletal changes. A-point horizontal restriction and forward mandibular horizontal growth accompanied the study group correction to Class I molar, and these changes were stable long term. Conclusions: One phase treatment for Class II malocclusion with high-pull headgear followed by fixed orthodontic appliances resulted in correction to Class I molar through restriction of horizontal maxillary growth with continued horizontal mandibular growth and vertical skeletal changes unaffected. The anteroposterior molar correction and skeletal effects of this treatment were stable long term.

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

2012 ◽  
Vol 06 (02) ◽  
pp. 123-132 ◽  
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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