scholarly journals A comparison of two different techniques for early correction of Class III malocclusion

2011 ◽  
Vol 82 (1) ◽  
pp. 96-101 ◽  
Author(s):  
J. Seehra ◽  
P. S. Fleming ◽  
N. Mandall ◽  
A. T. DiBiase
Keyword(s):  
Linear Regression Analysis ◽  
Face Mask ◽  
Maxillary Incisor ◽  
Control Group ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Mandibular Incisor ◽  
Lateral Cephalograms ◽  
And Gender ◽  
Retrospective Comparative Study

Abstract Objective: To compare the effectiveness of Reverse Twin-Block therapy (RTB) and protraction face mask treatment (PFM) with respect to an untreated control in the correction of developing Class III malocclusion. Materials and Methods: A retrospective comparative study of subjects treated cases with either PFM (n  =  9) or RTB (n  =  13) and untreated matched controls (n  =  10) was performed. Both the PFM and control group samples were derived from a previously conducted clinical trial, and the RTB group was formed of consecutively treated cases. The main outcome variables assessed were skeletal and dental changes. Lateral cephalograms were taken at the start and end of treatment or during the observation period. Analysis of variance was used to compare changes in cephalometric variables arising during the study period in the lateral group. Linear regression analysis and an unpaired t-test were used to determine the impacts of treatment duration and gender, respectively. Results: Significantly greater skeletal changes arose with PFM therapy than with RTB therapy or in the control group (SNA, SNB, and ANB; P < .001). The dentoalveolar effects of RTB therapy exceeded those of PFM treatment, with significantly more maxillary incisor proclination (P < .001) and mandibular incisor retroclination (P < .006) arising with treatment. Conclusions: Both appliances are capable of correction of Class III dental relationships; however, the relative skeletal and dental contributions differ. Skeletal effects, chiefly anterior maxillary translation, predominated with PFM therapy. The RTB appliance induced Class III correction, primarily as a result of dentoalveolar effects.

scholarly journals Influence of intentional ankylosis of deciduous canines to reinforce the anchorage for maxillary protraction

2013 ◽  
Vol 18 (1) ◽  
pp. 94-102 ◽  
Author(s):  
Luís Fernando Castaldi Tocci ◽  
Omar Gabriel da Silva Filho ◽  
Acácio Fuziy ◽  
José Roberto Pereira Lauris
Keyword(s):  
Mixed Dentition ◽  
Control Group ◽  
Class Iii ◽  
Maxillary Expansion ◽  
Significant Treatment ◽  
Maxillary Protraction ◽  
Lateral Cephalograms ◽  
Treatment Changes ◽  
And Gender ◽  
Cephalometric Study

INTRODUCTION: This retrospective cephalometric study analyzed the influence of intentional ankylosis of deciduous canines in patients with Class III malocclusion and anterior crossbite, in the deciduous and early mixed dentition stages, treated by orthopedic maxillary expansion followed by maxillary protraction. METHODS: Lateral cephalograms of 40 patients were used, divided in 2 groups paired for age and gender. The Ankylosis Group was composed of 20 patients (10 boys and 10 girls) treated with induced ankylosis and presenting initial and final mean ages of 7 years 4 months and 8 years 3 months, respectively, with a mean period of maxillary protraction of 11 months. The Control Group comprised 20 patients (10 boys and 10 girls) treated without induced ankylosis, with initial and final mean ages of 7 years 8 months and 8 years 7 months, respectively, with a mean period of maxillary protraction of 11 months. Two-way analysis of variance and covariance analysis were applied to compare the initial and final cephalometric variables and the treatment changes between groups. RESULTS: According to the results, the variables evidencing the significant treatment changes between groups confirmed that the intentional ankylosis enhanced the sagittal response of the apical bases (Pg-NPerp) and increased the facial convexity angles (NAP and ANB). CONCLUSIONS: The protocol involving intentional ankylosis of deciduous canines enhanced the sagittal response of the apical bases.

scholarly journals Treatment outcomes of Class II malocclusion cases treated with miniscrew-anchored Forsus Fatigue Resistant Device: A randomized controlled trial

2017 ◽  
Vol 87 (6) ◽  
pp. 824-833 ◽  
Author(s):  
Osama Eissa ◽  
Mahmoud El-Shennawy ◽  
Safaa Gaballah ◽  
Ghada El-Meehy ◽  
Tarek El Bialy
Keyword(s):  
Controlled Trial ◽  
Class Ii ◽  
Maxillary Incisor ◽  
Control Group ◽  
Mandibular Incisor ◽  
Treatment Groups ◽  
Lateral Cephalograms ◽  
Treatment Data ◽  
Group 2 ◽  
Forsus Fatigue Resistant Device

ABSTRACT Objective: To evaluate the skeletal, dental, and soft tissue effects of the Forsus Fatigue Resistant Device (FRD) used with miniscrew anchorage and compare them with those of the conventional Forsus FRD. Materials and Methods: This study was carried out on 38 patients. These patients were randomly allocated into three groups. The 14 patients in group 1 (aged 12.76 ± 1.0 years) were treated with the FRD appliance. In group 2, the 15 patients (aged 12.52 ± 1.12 years) received treatment with FRD using miniscrew anchorage, and the 9 patients in group 3 (aged 12.82 ± 0.9 years) received no treatment as a control group. Linear and angular measurements were made on lateral cephalograms before and immediately after Forsus treatment. Data were analyzed statistically using paired t-, ANOVA, and Tukey tests. Results: Class I molar relationship and overjet correction were achieved in both treatment groups. Although mandibular growth was statistically nonsignificant, there was a significant headgear effect on the maxilla. Mandibular incisor proclination, maxillary incisor retroclination, and distalization of maxillary molars were significant in both treatment groups. However, no significant differences were found between the treatment groups. Conclusions: Class II correction was mainly dentoalveolar in both treatment groups. Use of miniscrews with Forsus did not enhance mandibular forward growth nor prevent labial tipping of the mandibular incisors.

scholarly journals INFLUENCE OF GROWTH IN TREATED CLASS III GROWING PATIENTS WITH FACE MASK THERAPY AND UNTREATED PATIENTS

2019 ◽  
Vol 31 (4) ◽  
pp. 883-888
Author(s):  
Sofija Carceva Shalja ◽  
Sandra Atanasova
Keyword(s):  
Negative Impact ◽  
Face Mask ◽  
Treated Group ◽  
Control Group ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Maxillary Protraction ◽  
Before And After ◽  
Maxillary Deficiency ◽  
Observation Period

Developing Class III Malocclusion in most of the cases affects dentofacial appearance. The goal of this study is to investigate the changes in the facial appearances in treated patients withFace mask orthopedic treatment and untreated Class III patients. The sample consisted 49 patients (boys and girls),with average age of 9 years, who had a Class III Malocclusion with an anterior crossbite and a component of maxillary deficiency. 28 of them were treated with protraction Face mask- Delair mask (petit tipe), and the other 21 were presenting the control group consisted of untreated Class III Patients.In treated group pretreatment and posttreatment cephalometric radiographs from 28 patients(15 males and 13 females) were analyzed and compared with the results of cephalometric analyzes in untreated group(observation period of 1 year). Results from these study showed forward displacement of maxilla(SNA p<0.05),increasing of maxillary length(Co-A p<0.05)correction of maxillary-mandibular relationship(ANB p<0.05) in treated group while in untreated groupvalues for the parameters in the upper jaw and inter jaw relationship before and after the observation period of 1 yearshowed no statistically significant changes pointing to the negative impact of incorrect skeletal terms in Class III growing patients.Based on our findings we can concluded that in Class III patients there is a big motivation for orthodontic treatment because their dentofacial appearance deviates from sociocultural norms.Therefore, an important objective of accepting maxillary protraction treatment in Class III malocclusion is providing nonsurgical alternative in the treatment and improving the physico-social wellbeing and appearance of the patients, especially during their teenage years.

scholarly journals Effects of Presurgical Mandibular Incisor Decompensation on Long-Term Outcomes of Class III Surgical Orthodontic Treatment

2021 ◽  
Vol 10 (13) ◽  
pp. 2870
Author(s):  
Jung-Sub An ◽  
Wonchae Jeong ◽  
Liselotte Sonnesen ◽  
Seung-Hak Baek ◽  
Sug-Joon Ahn
Keyword(s):  
Orthodontic Treatment ◽  
Group Differences ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Long Term Outcomes ◽  
Mandibular Incisor ◽  
Skeletal Class ◽  
Lateral Cephalograms ◽  
Mandibular Incisors

This research aimed to evaluate the effects of presurgical mandibular incisor decompensation on long-term outcomes of Class III surgical orthodontic treatment. Thirty-five patients with skeletal Class III malocclusion who received conventional surgical orthodontic treatment were included. Mandibular incisor brackets with −6° of inclination were placed normally in 18 patients (NB group) and inversely in 17 patients (RB group). Between-group differences and relationships between incisal and skeletal variables were analyzed based on lateral cephalograms at pretreatment, presurgery, postsurgery, posttreatment, and retention. Mandibular incisors were more labially inclined in the RB group than in the NB group from presurgery to retention. No significant between-group differences were observed in presurgical and postsurgical skeletal relationships. The NB group exhibited a larger overjet with deficient interincisal contact at postsurgery than the RB group. Skeletal Class III relationship was also more severe in the NB group at retention. More lingually inclined mandibular incisors at presurgery and larger overjet at postsurgery were correlated with a more severe skeletal Class III relationship at retention. Thus, establishing appropriate postsurgical overjet by sufficient presurgical mandibular incisor decompensation may play a significant role in postsurgical stability of Class III surgical orthodontic treatment.

scholarly journals Long-Term Outcomes of Class III Treatment with Mandibular Cervical Headgear Followed by Fixed Appliances

2009 ◽  
Vol 79 (5) ◽  
pp. 828-834 ◽  
Author(s):  
Tiziano Baccetti ◽  
Diego Rey ◽  
Giovanni Oberti ◽  
Franka Stahl ◽  
James A. McNamara
Keyword(s):  
Skeletal Maturity ◽  
Control Group ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Two Phase ◽  
Fixed Appliance ◽  
Lateral Cephalograms ◽  
Significant Difference ◽  
Fixed Appliances

Abstract Objective: To evaluate the stability of the outcomes of mandibular cervical headgear (MCH) and fixed appliance–treated Class III patients at a long-term posttreatment (5 years) observation, compared with well-matched untreated Class III controls, following a previous report on the short-term outcomes of this protocol. Materials and Methods: The treated group consisted of 20 patients with dentoskeletal Class III malocclusions treated with a two-phase protocol consisting of MCH and fixed appliances, while the control group comprised 18 untreated subjects with similar dentoskeletal Class III malocclusion. Lateral cephalograms of both patients and controls were analyzed at two time points: posttreatment (PT), after two-phase treatment; and long term (LT). All patients were at a postpubertal stage of skeletal maturity at PT, and they showed CS6 at LT, thus revealing completion of pubertal craniofacial growth. Results: In the long term, the treatment group showed significantly smaller values for mandibular length (Co-Gn), SNB angle, maxillomandibular differential, and molar relation. When compared with the controls, the treated patients exhibited also greater values for ANB angle, Wits appraisal, and overjet at LT. No significant difference between the two groups was found for the changes occurring from PT to LT. Conclusions: Favorable dentoskeletal outcomes induced by MCH and fixed appliances remained stable in the long term; untreated Class III malocclusion did not show any tendency toward self-improvement during the postpubertal interval.

scholarly journals Treatment of Class III malocclusion using miniscrew-anchored inverted Forsus FRD: Controlled clinical trial

2018 ◽  
Vol 88 (6) ◽  
pp. 692-701 ◽  
Author(s):  
Osama Eissa ◽  
Mahmoud ElShennawy ◽  
Safaa Gaballah ◽  
Ghada ElMehy ◽  
Tarek El-Bialy
Keyword(s):  
Clinical Trial ◽  
Maxillary Incisor ◽  
Control Group ◽  
Controlled Clinical Trial ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Upper Lip ◽  
Maxillary Canine ◽  
Lower Incisor ◽  
Lower Lip

ABSTRACT Objectives: To evaluate the skeletal, dental, and soft tissue changes after the use of miniscrew-anchored inverted Forsus fatigue-resistant device (FRD) in treatment of Class III malocclusion. Materials and Methods: In this controlled clinical trial, 16 patients (9 girls and 7 boys; age 12.45 ± 0.87 years) were consecutively treated with miniscrew-anchored inverted Forsus FRD. This group was compared with a matched control group of 16 untreated patients (8 girls and 8 boys; age 11.95 ± 1.04 years). Miniscrews were inserted bilaterally between the maxillary canine and first premolar. Forsus FRD was selected and inserted in an inverted manner mesial to the mandibular headgear tube and distal to the maxillary canine bracket. Results: Class I molar and canine relationships with positive overjet were achieved in an average period of 6.4 ± 1.46 months. Maxillary forward growth showed a statistically significant increase (SNA°: 1.73 ± 0.53, P &lt; .5), maxillary incisor proclination was statistically significant (U1 to NA°: −0.39 ± 0.33, P &gt; .5), and the lower incisors exhibited significant retroclination (L1 to NB°: 1.65 ± 0.83, P &lt; .5). Significant lower lip retrusion and upper lip protrusion were obvious treatment outcomes (P &lt; .5). Conclusions: The use of miniscrew-anchored inverted FRD could effectively increase maxillary forward growth, but it did not prevent mesial movement of the maxillary dentition. Significant lower incisor retroclination was observed. Significant esthetic improvement of the facial profile was achieved primarily because of lower lip retrusion and upper lip protrusion.

scholarly journals Changes of anterior maxillary alveolar bone thickness following incisor proclination and extrusion

2014 ◽  
Vol 85 (4) ◽  
pp. 549-554 ◽  
Author(s):  
Udom Thongudomporn ◽  
Chairat Charoemratrote ◽  
Sarayut Jearapongpakorn
Keyword(s):  
Alveolar Bone ◽  
Tooth Movement ◽  
Rank Correlation ◽  
Maxillary Incisor ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Bone Thickness ◽  
Lateral Cephalograms ◽  
Maxillary Incisors ◽  
Palatal Bone

ABSTRACT Objective:  To investigate changes in maxillary alveolar bone thickness after maxillary incisor proclination and extrusion during anterior crossbite correction in a group of growing patients with Class III malocclusion. Materials and Methods:  Maxillary incisors of 15 growing patients with anterior crossbite were proclined and extruded with 0.016″ beta-titanium advancing loops and Class III elastics. Lateral cephalograms were recorded before advancement (T0) and 4 months after a normal overjet and overbite were achieved (T1). Changes in alveolar bone thickness surrounding the maxillary incisors at the crestal (S1), midroot (S2), and apical (S3) levels were measured using cone-beam computed tomography (CBCT). Paired t-tests were used to determine the significance of the changes. A Spearman rank correlation analysis was performed to explore the relationship between thickness changes and the rate and amount of incisor movements. Results:  Although statistically significant decreases were observed in palatal and total bone thickness at the S2 and S3 level (P &lt; .05), the amounts of these changes were clinically insignificant, ranging from 0.34 to 0.59 mm. Changes in labial bone thickness at all levels were not significant. Changes in palatal bone thickness at S3 were negatively correlated with changes in incisor inclination. (r  =  −0.71; P &lt; .05). Conclusion:  In a group of growing patients with Class III malocclusion undergoing anterior crossbite correction, controlled tipping mechanics accompanied by extrusive force may produce successful tooth movement with minimal iatrogenic detriment to the alveolar bone.

scholarly journals Analysis of MYO1H Gene Polymorphism in Skeletal Class-III Malocclusion Due to Mandibular Prognathism

2021 ◽  
Author(s):  
Anjana Atteeri ◽  
Praveen Kumar Neela ◽  
Pavan Kumar Mamillapalli ◽  
Vasu M. Sesham ◽  
Sreekanth Keesara ◽  
...  
Keyword(s):  
Local Population ◽  
Research Work ◽  
Control Group ◽  
Study Group ◽  
Genome Wide Association Studies ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Mandibular Prognathism ◽  
Skeletal Class ◽  
Increased Risk

Abstract Background Mandibular prognathism (MP) is a craniofacial deformity resulting from the combined effects of environmental and genetic factors. Although various linkage and genome-wide association studies for mandibular prognathism have identified multiple strongly associated regions and genes, the causal genes and variants responsible for the deformity remained ambiguous. Aim This research work was aimed to study the association between polymorphism rs10850110 of the MYO1H gene and skeletal class-III malocclusion in our local population. Materials and Methods Thirty patients with skeletal class III due to mandibular prognathism in the study group and 30 patients with skeletal class I in the control group were selected for this study. These patients were from both sexes and above age 10 years. Based on the cephalometric values, patients were categorized into study and control groups. SNB (angle between sella, nasion and point B at nasion) greater than 82 degrees with an ANB (angle between point A, nasion and point B at nasion) of less than 0 degrees in the study group and ANB (angle between point A, nasion and point B at nasion) of 2 to 4 degrees in the control group were categorized. The polymorphism (rs10850110) of the MYO1H gene was genotyped using polymerase chain reaction and restriction fragment length polymorphism. Associations were tested with SNP exact test using SNPstats software. Results The single-nucleotide polymorphism rs10850110 showed a statistically significant association with mandibular prognathism. The G allele of marker rs10850110 (5′ of myosin1H - MYO1H) was overrepresented when compared with the “A” allele in mandibular prognathism cases (p < 0.0001), and this was very significant. Conclusion These results suggest that the rs10850110 polymorphism of the MYO1H gene is associated with an increased risk for mandibular prognathism.

scholarly journals Analysis of Tongue Function from the Orthodontist’s Point of View: Not Only a Matter of Deglutition

2021 ◽  
Vol 11 (6) ◽  
pp. 2520
Author(s):  
Andrea Deregibus ◽  
Simone Parrini ◽  
Maria Chiara Domini ◽  
Jacopo Colombini ◽  
Tommaso Castroflorio
Keyword(s):  
Point Of View ◽  
Control Group ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Maxillary Hypoplasia ◽  
Skeletal Class ◽  
Posterior Crossbite ◽  
Rest Position ◽  
Functional Aspects ◽  
Angle Class Iii Malocclusion

Many studies report that maxillofacial growth is influenced by genetic and environmental elements and that incorrect breathing, chewing, sucking, and swallowing are promoting factors of malocclusion. This study aims to evaluate the function and the influence of the tongue positions in patients with Angle class III malocclusion, maxillary hypoplasia, and posterior crossbite. One hundred patients, aged between 6 and 12 years old, were enrolled for the study. In the first group, patients with a diagnosis of class III malocclusion, affected by maxillary hypoplasia, skeletal class III, and posterior dental crossbite were recruited. In the control group, not treated patients with no malocclusion, skeletal class I, and without posterior dental crossbite were selected. Regarding atypical deglutition, no statistical differences were reported between the two groups, and 14% of patients reported ankyloglossia. Statistical differences were found in tongue rest position and during the execution of “hold and pull” and “chuck” exercises. Results obtained in this observational study showed that the clinician (orthodontist or general dentist) should analyze the presence/absence of atypical swallowing, the anatomical and functional aspects, and the tongue behavior in the rest position.

Skeletal effects of early treatment of Class III malocclusion with maxillary expansion and face-mask therapy

1998 ◽  
Vol 113 (3) ◽  
pp. 333-343 ◽  
Author(s):  
Tiziano Baccetti ◽  
Jean S. McGill ◽  
Lorenzo Franchi ◽  
James A. McNamara ◽  
Isabella Tollaro
Keyword(s):  
Early Treatment ◽  
Face Mask ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Maxillary Expansion ◽  
Skeletal Effects
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