Dental and skeletal effects after total arch distalization using modified C-palatal plate on hypo- and hyperdivergent Class II malocclusions in adolescents

2020 ◽  
Author(s):  
Chang Yoon Jung ◽  
Jae Hyun Park ◽  
Ja Hyeong Ku ◽  
Nam-Ki Lee ◽  
Yoonji Kim ◽  
...  
Keyword(s):  
Orthodontic Treatment ◽  
Class Ii ◽  
Study Group ◽  
Class Ii Malocclusion ◽  
Plane Angle ◽  
Mandibular Plane ◽  
Lateral Cephalograms ◽  
Palatal Plate ◽  
Skeletal Effects ◽  
Facial Types

ABSTRACT Objectives To compare the dental and skeletal treatment effects after total arch distalization using modified C-palatal plates (MCPPs) on adolescent patients with hypo- and hyperdivergent Class II malocclusion. Materials and Methods The study group included 40 patients with Class II malocclusion (18 boys and 22 girls, mean age = 12.2 ± 1.4 years) treated with MCPPs. Fixed orthodontic treatment started with the distalizing process in both groups. Participants were divided into hypo- or hyperdivergent groups based on their pretreatment Frankfort mandibular plane angle (FMA) ≤22° or ≥28°, respectively. Pre- and posttreatment lateral cephalograms were digitized, and 23 variables were measured and compared for both groups using paired and independent t-tests. Results The hyper- and hypodivergent groups showed 2.7 mm and 4.3 mm of first molar crown distalizing movement, respectively (P < .001). The hypodivergent group had a slight 2.2° crown distal tipping of first molars compared with 0.3° in the hyperdivergent group. After distalization, the FMA increased 3.1° and 0.3°, in the hypodivergent and hyperdivergent groups, respectively (P < .001). SNA decreased in the hypodivergent group, while other skeletal variables presented no statistically significant differences in the changes between the groups. Conclusions The hypodivergent group showed more distal and tipping movement of the maxillary first molar and increased FMA than the hyperdivergent group. Therefore, clinicians must consider vertical facial types when distalizing molars using MCPPs in Class II nonextraction treatment.

scholarly journals Dental and skeletal effects after total arch distalization using modified C-palatal plate on hypo- and hyperdivergent Class II malocclusions in adolescents

2020 ◽  
Vol 91 (1) ◽  
pp. 22-29
Author(s):  
Chang Yoon Jung ◽  
Jae Hyun Park ◽  
Ja Hyeong Ku ◽  
Nam-Ki Lee ◽  
Yoonji Kim ◽  
...  
Keyword(s):  
Orthodontic Treatment ◽  
Class Ii ◽  
Study Group ◽  
Class Ii Malocclusion ◽  
Plane Angle ◽  
Mandibular Plane ◽  
Lateral Cephalograms ◽  
Palatal Plate ◽  
Skeletal Effects ◽  
Facial Types

ABSTRACT Objectives To compare the dental and skeletal treatment effects after total arch distalization using modified C-palatal plates (MCPPs) on adolescent patients with hypo- and hyperdivergent Class II malocclusion. Materials and Methods The study group included 40 patients with Class II malocclusion (18 boys and 22 girls, mean age = 12.2 ± 1.4 years) treated with MCPPs. Fixed orthodontic treatment started with the distalizing process in both groups. Participants were divided into hypo- or hyperdivergent groups based on their pretreatment Frankfort mandibular plane angle (FMA) ≤22° or ≥28°, respectively. Pre- and posttreatment lateral cephalograms were digitized, and 23 variables were measured and compared for both groups using paired and independent t-tests. Results The hyper- and hypodivergent groups showed 2.7 mm and 4.3 mm of first molar crown distalizing movement, respectively (P < .001). The hypodivergent group had a slight 2.2° crown distal tipping of first molars compared with 0.3° in the hyperdivergent group. After distalization, the FMA increased 3.1° and 0.3°, in the hypodivergent and hyperdivergent groups, respectively (P < .001). SNA decreased in the hypodivergent group, while other skeletal variables presented no statistically significant differences in the changes between the groups. Conclusions The hypodivergent group showed more distal and tipping movement of the maxillary first molar and increased FMA than the hyperdivergent group. Therefore, clinicians must consider vertical facial types when distalizing molars using MCPPs in Class II nonextraction treatment.

scholarly journals Skeletal and dental effects of molar distalization using a modified palatal anchorage plate in adolescents

2014 ◽  
Vol 85 (4) ◽  
pp. 657-664 ◽  
Author(s):  
Noor Laith Sa'aed ◽  
Chong Ook Park ◽  
Mohamed Bayome ◽  
Jae Hyun Park ◽  
YoonJi Kim ◽  
...  
Keyword(s):  
Treatment Duration ◽  
Orthodontic Treatment ◽  
Class Ii ◽  
Class Ii Malocclusion ◽  
Treatment Results ◽  
Molar Distalization ◽  
Lateral Cephalograms ◽  
Significant Difference ◽  
Main Effect ◽  
Skeletal Effects

ABSTRACT Objective:  To evaluate and compare skeletal effects and the amount of molar distalization in maxilla using modified palatal anchorage plate (MPAP) vs headgear appliances in adolescent patients. Materials and Methods:  Pre- and posttreatment lateral cephalograms of 45 Class II malocclusion patients were analyzed; 24 were treated with MPAP appliances (age, 12.4 years) and 21 with headgear (age, 12.1 years). Fixed orthodontic treatment started with the distalization process in both groups. Thirty-two variables were measured and compared between both groups using multivariate analysis of covariates. Results:  There was no significant main effect of the appliance type on the treatment results (P  =  .063). Also, there was no significant main effect of the appliance type on both pre- and posttreatment comparisons (P  =  .0198 and .135, respectively). The MPAP and headgear groups showed significant distalization of maxillary first molars (3.06 ± 0.54 mm and 1.8 ± 0.58 mm, respectively; P < .001). Sagittal skeletal maxillomandibular differences were improved after treatment (P < .001), with no significant differences between the two groups. No significant difference in treatment duration was found between the groups. Conclusions:  The MPAP showed a significant skeletal effect on the maxilla. Both MPAP and headgear resulted in distalization of maxillary first molars. Therefore, it is recommended that clinicians consider the application of MPAP, especially in noncompliant Class II patients.

scholarly journals A Comparison of Craniofacial Characteristics between Two Different Adult Populations with Class II Malocclusion—A Cross-Sectional Retrospective Study

Biology ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 438
Author(s):  
Arvind Sivakumar ◽  
Prasad Nalabothu ◽  
Huyen Nguyen Thanh ◽  
Gregory S. Antonarakis
Keyword(s):  
Growth Pattern ◽  
Class Ii ◽  
Class Ii Malocclusion ◽  
South Indian Population ◽  
The South ◽  
Facial Height ◽  
South Indian ◽  
Mandibular Plane ◽  
Lateral Cephalograms ◽  
Craniofacial Characteristics

The dental, skeletal, and soft-tissue characteristics of a particular malocclusion can differ based on ethnicity, race, age, sex and geographical location with Class II malocclusion being one of the most prevalent malocclusions encountered in orthodontic clinical practice. The broad understanding of the characteristics of vertical skeletal and dental parameters in patients with Class II malocclusion can help clinicians to identify patterns and variations in the expression of this phenotype for better treatment outcomes. Hence, we compared the craniofacial characteristics of skeletal and dental Class II malocclusion traits from Indian and Vietnamese individuals to analyze the vertical skeletal and dental patterns in both population groups. The sample comprised of lateral cephalograms from 100 young adults with Class II malocclusion, of which fifty (25 males and 25 females) were from South India and the other 50 age- and sex-matched adults from Vietnam. The lateral cephalometric radiographs were digitized into anonymous image files and were traced and assessed for 16 vertical skeletal and dental parameters. The ANB angle was greater in males (+1.4 deg; p < 0.001) and females (+1.9 deg; p < 0.001) in the South Indian population. The Vietnamese males had a larger mandibular plane angle, articular angle, anterior facial height and lower anterior facial height compared to the Indian males. The Vietnamese females had larger mandibular plane and articular angles compared to the Indian females. The skeletal class II malocclusion was more severe in the South Indian compared to the Vietnamese adults. The Vietnamese sample showed a generalized tendency towards a more vertical skeletal growth pattern and in males this pattern seemed to be due to the dentoalveolar component. The Vietnamese females showed a tendency towards a vertical growth pattern, but without apparent contribution by the dentoalveolar component.

Prognostic Indicators for Anterior Mandibular Repositioning in Adolescents with Class II Malocclusion: A Cross-Sectional Cephalometric Study

2020 ◽  
Vol 44 (4) ◽  
pp. 274-282
Author(s):  
Jong-Moon Chae ◽  
Jae Hyun Park ◽  
Seon-Hye Kim ◽  
Utkarsh Mangal ◽  
Hye Young Seo
Keyword(s):  
Soft Tissues ◽  
Class Ii ◽  
Prognostic Indicators ◽  
Class Ii Malocclusion ◽  
Hard Tissue ◽  
Cross Sectional ◽  
Mandibular Plane ◽  
Lateral Cephalograms ◽  
Cephalometric Changes ◽  
Cephalometric Study

Objective: To investigate the cephalometric changes following anterior repositioning of the mandible for predicting the treatment effects in Class II adolescent patients. Study Design: Lateral cephalograms of 28 patients (ANB &gt; 4°) were taken in centric occlusion (CO) and edge-to-edge bite (EtoE) before orthodontic treatment. The patients were classified into two groups according to their mandibular plane angle [MPA; low MPA (LMPA) ≤ 28° and high MPA (HMPA) &gt; 28°]. Cephalometric changes of hard and soft tissues were measured and analyzed with an x-y cranial base coordinate system. Results: For CO to EtoE, there were no significant cephalometric changes between HMPA and LMPA, but the horizontal ratio of soft to hard tissue pogonion (H-Pog′/H-Pog) change was significantly greater with LMPA than with HMPA while the vertical ratio (V-Pog′/V-Pog) showed vice versa. For CO to EtoE, MPA showed significant correlations with H-Pog′/H-Pog and V-Pog′/V-Pog. Y-axis angle, V-Pog′/V-Pog and H-Pog′/H-Pog can be used as good tools to discriminate between HMPA and LMPA. Conclusion: Cephalometric findings for CO to EtoE may be useful in predicting the vertical and horizontal changes of hard and soft tissues with the treatment of growing adolescents having various vertical skeletal patterns of Class II malocclusion.

scholarly journals Comparative Study of the Bionator and Multi. P Appliances in the Treatment of Class II Malocclusion: a Cephalometric Study

2013 ◽  
Vol 2 (1) ◽  
pp. 1-11
Author(s):  
Morteza Oshagh ◽  
Mahtab Memarpour ◽  
Hooman Zarif Najafi ◽  
Somayeh Heidary
Keyword(s):  
Class Ii ◽  
Mandibular Advancement ◽  
Class Ii Malocclusion ◽  
Treatment Groups ◽  
Class Ii Treatment ◽  
Mandibular Plane ◽  
End Of Treatment ◽  
Lateral Cephalograms ◽  
Functional Appliances ◽  
Cephalometric Study

Background: Functional appliances such as Bionator have been used to treat Class II malocclusion. The purpose of this study was to compare the skeletal, dental and soft tissue effects of Bionator appliances with Multi-P (a newly developed appliance) in the treatment of Class II malocclusion. Subjects and methods: 45 class II children were chosen and randomly assigned to either the Bionator or Multi-P treatment group. After excluding 13 patients from the study, 21 patients in Bionator and 11 patients in Multi-P group have participated in the study. Lateral cephalograms were analyzed at the beginning (To) and at the end of treatment (T1) to evaluate the changes in both groups. The paired t.test and Leven’s test were enrolled for statistical analysis.Results: Reduction of ANB angle was detected in both treatment groups. The Bionator group underwent insignificant greater mandibular advancement as measured by the SNB angle. (p= 0.737) The mandibular plane angle increased insignificantly in both groups. (p> 0.05) The inclination of upper incisors decreased significantly in Multi-P group. (p= 0.042)Conclusion: Both appliances are effective therapeutic means for class II treatment associated with mandibular deficiency and may lead to normalization of the dentoskeletal parameters at the end of the treatment.

scholarly journals Dental, skeletal and soft tissue effects of the Distal Jet appliance: A prospective clinical study

2019 ◽  
Vol 24 (6) ◽  
pp. 56-64 ◽  
Author(s):  
Rachelle Simões Reis ◽  
José F. C. Henriques ◽  
Guilherme Janson ◽  
Karina Maria Salvatore Freitas ◽  
Wilana Moura
Keyword(s):  
Soft Tissue ◽  
Class Ii ◽  
Control Group ◽  
Class Ii Malocclusion ◽  
Plane Angle ◽  
Tissue Effects ◽  
Mandibular Plane ◽  
Maxillary Incisors ◽  
Distal Jet ◽  
Mandibular Plane Angle

ABSTRACT Objective: This study evaluated the dental, skeletal and soft tissue effects in Class II malocclusion patients treated with Distal Jet appliance, compared to an untreated control group. Methods: 44 patients with Class II malocclusion were divided into two groups: Group 1 (experimental) - 22 patients, mean age of 12.7 years, treated with the Distal Jet appliance for a mean period of 1.2 years; Group 2 (control) - 22 untreated patients, mean age of 12.2 years, followed by a mean period of 1.2 years. Lateral cephalograms were obtained before treatment (T0) and at the end of the distalization (T1).Independent t test was used to identify intergroup differences. Results: When compared to control group, the Distal Jet produced a significant increase in mandibular plane angle (0.7 ± 2.0o). The maxillary second molars presented distal inclination (6.6 ± 3.8o), distalization (1.1 ± 1.1 mm) and extrusion (1.3 ± 2.1 mm). The maxillary first molars distalized by 1.2 ± 1.4 mm. The maxillary first premolars mesialized by 3.4 ± 1.1 mm. The maxillary incisors showed slight labial tipping of 4.3 ± 4.7o and were protruded by 2.4 ± 1.7 mm. There were no significant changes in the facial profile. The overjet increased 1.5 ± 1.1 mm and overbite had no significant changes. Conclusion: The Distal Jet appliance is effective to distalize the maxillary first molars, but promotes increase in mandibular plane angle, distal inclination, extrusion and distalization of maxillary second molars, mesialization of maxillary first premolars, proclination and protrusion of maxillary incisors, and increase in overjet, when compared to a control group.

scholarly journals Noncompliance Open-Bite Treatment with Zygomatic Anchorage

2007 ◽  
Vol 77 (6) ◽  
pp. 986-990 ◽  
Author(s):  
Nejat Erverdi ◽  
Serdar Usumez ◽  
Alev Solak ◽  
Tamer Koldas
Keyword(s):  
Open Bite ◽  
Occlusal Plane ◽  
Study Group ◽  
Plane Angle ◽  
Facial Height ◽  
Lateral Cephalograms ◽  
Zygomatic Implants ◽  
Skeletal Effects ◽  
The Mean ◽  
New Generation

Abstract Objective: To evaluate the dentoalveolar and skeletal effects of the new-generation open-bite appliance. Subjects and Methods: The study group was composed of 11 subjects with a mean age of 19.5 years who underwent intrusion of the posterior dentoalveolar segment using an open-bite appliance supported by bilateral zygomatic implants. The study was carried out on lateral cephalograms of the subjects taken before treatment and after intrusion. The mean intrusion time was 9.6 months. Results: The mean intrusion measured as the distance of the U6 to the palatal plane was 3.6 ± 1.4 mm (P &lt; .001). This resulted in an average of 3.0° ± 1.5° of closure of the Go-Gn-SN angle (P &lt; .001). The gain in the overbite was 5.1 ± 2.0 mm (P &lt; .001), and the overjet was reduced by 1.4 ± 1.5 mm (P &lt; .01). The change in the occlusal plane angle was an average of 2.4° ± 1.4° counterclockwise rotation (P &lt; .001). The lower facial height was also decreased significantly by 2.9 ± 1.3 mm (P &lt; .001). No significant changes were observed in the SNA angle and incisor positions (P &gt; .05), except for the interincisal angle, which was increased by 3.5° (P &lt; .05). Conclusion: Zygomatic anchorage can be used effectively for open-bite correction through posterior dentoalveolar intrusion.

A Cephalometric Evaluation of Craniofacial Morphology in Familial Dysautonomia

1998 ◽  
Vol 35 (2) ◽  
pp. 120-126 ◽  
Author(s):  
Eliyahu Mass ◽  
Ilana Brin ◽  
Leon Belostoky ◽  
Channa Maayan ◽  
Natan Gadoth
Keyword(s):  
Normal Values ◽  
Familial Dysautonomia ◽  
Craniofacial Morphology ◽  
Study Group ◽  
Compensatory Mechanism ◽  
Plane Angle ◽  
Mandibular Growth ◽  
Characteristic Appearance ◽  
Mandibular Plane ◽  
Lateral Cephalograms

Objective The purpose of this study was to delineate the craniofacial and dentoalveolar morphology of patients with familial dysautonomia (FD) in order to contribute to the understanding of the association between progressive sensory and autonomic neuropathy and the characteristic appearance of the dys-autonomic face. Patients The study group comprised 32 patients with FD (15 females and 17 males; mean age 10.8 years, SD 3.5 years, range 5.8-19.8 years). Design Lateral cephalograms from each patient were traced twice. The means of the two measurements were compared with homologous cephalo-metric normal values of ethnic-specific and classical norms from the literature. Results In some parameters, the craniofacial morphology of the FD group was significantly different from the classical norms. There was a pronounced retrognathism in the mandible and a steep mandibular plane angle. The skeletal features of FD patients more closely resembled those of their ethnic group, although they were more retrognathic, and the mandibular growth axis was more horizontal. The incisors of these patients were more retropositioned and retroclined than were those of their healthy counterparts. Conclusions The results suggest an insufficiency of the expected dentoal-veolar compensatory mechanism that usually helps to bridge skeletal discrepancies. It is postulated that the neuropathy is probably the important factor in the lack of this compensatory mechanism.

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