scholarly journals The possibilities of computer simulation of the orthognatic surgical procedure in the treatment of class II malocclusion

2008 ◽  
Vol 55 (3) ◽  
pp. 147-153
Author(s):  
Jovana Milutinovic ◽  
Nenad Nedeljkovic ◽  
Predrag Nikolic
Keyword(s):  
Surgical Treatment ◽  
Computer Software ◽  
Class Ii ◽  
Second Step ◽  
Class Ii Malocclusion ◽  
Tissue Analysis ◽  
Computer Aided ◽  
Before And After ◽  
The Difference ◽  
School Of Dentistry

Aim: The aim of this study was to investigate the possibilities for computer-aided orthognathic surgery in the treatment of class II malocclusions. Materials and methods: Twelve patients treated at the Dept. of Orthodontics, School of Dentistry, Belgrade, were included in the study. Profile cephalometric analyses of all patients were conducted before and after the treatment. The first step was the profile cephalometric analysis before the treatment using the computer software Nemotec dental studio NX2005 and the second step was the computer-aided simulation using the same software. Results: The difference in the results was found in the soft-tissue analysis, which can be explained by the possibility of observing the instant changes in patients' profiles during the simulation of surgical treatment. Conclusion: Based on the results of the present study, it can be concluded that the computer-aided simulation provides a faster approach, a possibility to educate patients before the surgical treatment and a better clinician-patient communication.

scholarly journals En-face parameters change after orthodontic treatment of Class II malocclusion

2016 ◽  
Vol 63 (4) ◽  
pp. 167-175
Author(s):  
Jovana Milutinović ◽  
Nenad Nedeljković
Keyword(s):  
Orthodontic Treatment ◽  
Class Ii ◽  
Class Ii Malocclusion ◽  
Anthropometric Parameters ◽  
Significant Difference ◽  
En Face ◽  
Before And After ◽  
Facial Proportions ◽  
The Difference ◽  
Multibracket Appliance

Summary Introduction The aim was to evaluate the difference in en-face anthropometric facial parameters and proportions of patients with Class II malocclusion, before and after orthodontic treatment as well as changes in linear parameters and facial proportions and their deviation from ideal values. Material and method In this study, en-face photographs before and after the treatment of 50 Class II malocclusion patients were used. Patients were divided in two groups; first group comprised 25 patients treated with multibracket appliance with extractions, and second group included 25 patients treated without extractions, using fixed functional Herbst and multibracket appliance. On each and every photo before and after the treatment facial points and lines were drawn, and linear parameters were determined, based on those markers. Results showed change in anthropometric parameters in both groups of patients. Statistically significant difference was found for parameters in the middle and lower facial third. Facial proportions changed after the treatment in both groups and they approached ideal values and golden proportion 1:1.618 in the lower facial third. Conclusion Patients with Class II, division 1 malocclusion, deviate from an ideal set of proportions, particularly in the lower facial third. After the orthodontic treatment, anthropometric parameters in the lower facial third were approaching ideal values.

scholarly journals Infra-Zygomatic Mini Screws Compared to High Pull Headgear for Distalization And Intrusion of Maxillary Molars in Growing Patients with Class II Malocclusion: A Randomized Clinical Trial

2021 ◽  
Vol 2 (1) ◽  
pp. 14-19
Author(s):  
Ahmed K. Afify ◽  
Amr E. El-Dakroury ◽  
Sherif A. El-Kordy ◽  
Mostafa M. El-Dawlatly
Keyword(s):  
Clinical Trial ◽  
Clinical Study ◽  
Treatment Duration ◽  
Class Ii ◽  
Class Ii Malocclusion ◽  
Maxillary Molars ◽  
Randomized Clinical Study ◽  
Molar Intrusion ◽  
Before And After ◽  
Patient Cooperation

Objective: The aim of the present randomized clinical study was to evaluate the distalization and intrusion effect of an Infra-zygomatic mini-screws supported appliance and compare it with high pull headgear appliance in treatment of growing patients with class II malocclusion. Methodology: 22 growing boys aged between (10 to 12 years) with class II div 1 malocclusion randomly divided to 2 equal groups. The first group treated with high pull headgear with acrylic splint and the second one treated with an Infra-zygomatic mini-screws supported appliance. The treatment duration was 8 months for both groups. Lateral cephalometric radiographs were taken before and after the treatment for each patient to be analyzed. Results: The maxillary first molar distalization was 2.58±2.31 mm in head gear group and 1.53±2.83 mm in mini-screws group. There was no significant maxillary first molar intrusion in both groups. There were no significant differences between the two groups. Conclusions: the mini-screws supported appliance can be used as the fixed replacement of the removable high pull headgear appliance with no need for patient cooperation.

scholarly journals Orthodontic Camouflage Treatment of Class II Malocclusion in Non-growing Patient - A Case Report

2015 ◽  
Vol 5 (1) ◽  
pp. 46-49 ◽  
Author(s):  
Lubna Khan ◽  
Hemant Kumar Halwai ◽  
Rajiv Yadav ◽  
Ourvind Jeet Singh Birring
Keyword(s):  
Case Report ◽  
Surgical Treatment ◽  
Asian Population ◽  
Class Ii ◽  
Adult Patients ◽  
Treatment Modalities ◽  
Class Ii Malocclusion ◽  
Facial Profile ◽  
Skeletal Class ◽  
Skeletal Class Ii

The prevalence of skeletal Class II malocclusion is high amongst Asian population. Various treatment modalities have been presented for the treatment of Class II malocclusions in adult patients. We come across many adult patients who desire a costeffective and non-surgical correction and they accept dental camouflage as a treatment option to mask skeletal discrepancy. This case report presents a 26-year-old non-growing female who had a skeletal Class II malocclusion with prognathic maxilla and retrognathic mandible with an overjet of 7 mm, severe crowding, but did not want surgical treatment. We considered the camouflage treatment by extracting upper first premolars. Following the treatment, a satisfactory result was achieved with an acceptable static and functional occlusion, facial profile, smile and lip competence with patient satisfaction.

Mandibular propulsion appliance for adults with Class II malocclusion: a systematic review and meta-analysis

2019 ◽  
Vol 42 (2) ◽  
pp. 163-173 ◽  
Author(s):  
Daybelis González Espinosa ◽  
Milena Santos ◽  
Sissy Maria dos Anjos Mendes ◽  
David Normando
Keyword(s):  
Clinical Trials ◽  
Randomized Clinical Trials ◽  
Meta Analysis ◽  
Scientific Evidence ◽  
Class Ii ◽  
Class Ii Malocclusion ◽  
Herbst Appliance ◽  
Skeletal Changes ◽  
Before And After ◽  
Mandibular Retrusion

Summary Background The effects of mandibular propulsion appliances in adults have some controversial results. While some authors claim that its use in non-growing patients could produce some dentoskeletal effects, other studies indicate that Class II correction occurs only through significant dental effects. Objective To evaluate the effects in non-growing Class II patients with mandibular retrusion, promoted by the treatment with mandibular propulsion appliances and determine if they produce mandibular changes. Methods The research was carried out in nine electronic databases and additional manual searches up to July 2019. Selection criteria were no restriction was placed on date and publication language. Randomized or non-randomized clinical trials with/without control were included. They must evaluated non-growing patients with Class II malocclusion, treated with mandibular propulsion appliances; outcomes were assessed before and after treatment. Data collection and analysis Data were extracted by two independent examiners in duplicate. The ROBINS-I tool was used to assess the methodological quality of the included studies. Results Of the 2824 articles identified, 11 non-randomized clinical articles were selected for qualitative analysis and 8 for quantitative analysis. SNB (0.87°, CI 95% 0.08, 1.66), ANB (−0.82°, CI 95% −1.24 to 0.40) and Pg/OLp [2.3 to 1.2 mm (P < 0.001)] presented smallest but significant mandibular changes with some differences regarding the used appliance. The Herbst appliance showed the largest mandibular changes followed by the SUS appliance when evaluated through Ar-Pg. SNA showed non-significant changes. Overbite (−2.85. CI 95% −3.06, −2.64), Overjet (−5.00.CI 95% −5.45, −4.55) showed significant changes in all devices. Class II correction occurs through a significant labial movement of the mandibular incisors, some lingual inclination of the maxillary incisors and minor skeletal changes. Conclusions All mandibular propulsion appliances examined, showed efficiency in normalizing the Class II malocclusion in adult patients; however, changes were acquired mainly through dentoalveolar changes. Some minor mandibular forward changes was noted, mainly in patients treated with the Herbst appliance. Randomized clinical trials are needed to improve scientific evidence. Registration PROSPERO (code CRD42017067384).

scholarly journals Three-dimensional evaluation of maxillary dentoalveolar changes and airway space after distalization in adults

2018 ◽  
Vol 88 (2) ◽  
pp. 187-194 ◽  
Author(s):  
Jae Hyun Park ◽  
Sungkon Kim ◽  
Yoon-Jin Lee ◽  
Mohamed Bayome ◽  
Yoon-Ah Kook ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Transverse Dimension ◽  
Class Ii ◽  
Class Ii Malocclusion ◽  
Cross Sectional ◽  
Palatal Plate ◽  
Before And After ◽  
Maxillary Dentition ◽  
The Relationship ◽  
Viable Treatment

ABSTRACT Objectives: To evaluate the changes in position of the maxillary dentition and the airway space after distalization using a modified C-palatal plate (MCPP) in adult patients through CBCT images and to analyze the relationship between the amount of distalization and the changes in the airway space. Materials and Methods: CBCT images of 33 adult Class II patients (22.2 ± 4.0 years old; 27 women and 6 men) treated by total maxillary arch distalization using the MCPP were evaluated before and after distalization. The patients were divided into nonextraction and extraction groups. The changes in the airway space as well as the changes in the positions of the maxillary dentition were evaluated. The distalization effects were calculated and assessed using paired t-tests. Results: After distalization, the first molar showed significant distalization and intrusion (P < .001) with no significant rotation of the crown and no significant buccal displacement of its root in the transverse dimension. There were no significant changes in the airway volume or the minimum cross-sectional area of the oropharynx. Conclusions: The application of the MCPP resulted in significant total arch distalization without a significant effect on the transverse dimensions or changes in the oropharynx airway space. The MCPP can be considered a viable treatment option for patients with Class II malocclusion.

scholarly journals Anchorage control using miniscrews in comparison to Essix appliance in treatment of postpubertal patients with Class II malocclusion using Carrière Motion Appliance:

2021 ◽  
Author(s):  
Ahmed S. Fouda ◽  
Khaled H. Attia ◽  
Amr M. Abouelezz ◽  
Mohamed Abd El-Ghafour ◽  
Mai H. Aboulfotouh
Keyword(s):  
Class Ii ◽  
The Other ◽  
Cone Beam ◽  
Class Ii Malocclusion ◽  
Lower Incisor ◽  
Computed Tomographic ◽  
Division 1 ◽  
Maxillary Molar ◽  
The Difference ◽  
Anchorage Loss

ABSTRACT Objectives To evaluate anchorage control using miniscrews vs an Essix appliance in treatment of Class II malocclusion by distalization using the Carrière Motion Appliance (CMA). Materials and Methods Twenty-four postpubertal female patients with Class II, division 1 malocclusion were randomly distributed into two equal groups. CMA was bonded in both groups, and one group was treated with miniscrews as anchorage (12 patients, mean age = 18.0 years) while the other group was treated with an Essix appliance as anchorage (12 patients, mean age = 17.8 years). For each patient, two cone-beam computed tomographic scans were obtained: one preoperatively and another after completion of distalization. Results In the Essix appliance group, there was a statistically significant anterior movement (2.2 ± 1.43 mm) as well as proclination of the lower incisor (5.3° ± 4.0°), compared to a nonsignificant anterior movement (0.06 ± 1.45 mm) and proclination (0.86° ± 2.22°) in the miniscrew group. The amount of maxillary molar distalization was higher in the miniscrew group (2.57 ± 1.52 mm) than in the Essix appliance group (1.53 ± 1.11 mm); however, the difference was not statistically significant. Conclusions Miniscrews led to a decrease in the amount of anchorage loss in the mandibular incisors, both in terms of anterior movement and proclination.

scholarly journals Evaluation of Profile Changes in Class II Individuals Treated by Means of Herbst Miniscope Appliance

2020 ◽  
Vol 8 (1) ◽  
pp. 27 ◽  
Author(s):  
Stefano Martina ◽  
Maria Luisa Di Stefano ◽  
Francesco Paolo Paduano ◽  
Domenico Aiello ◽  
Rosa Valletta ◽  
...  
Keyword(s):  
Soft Tissues ◽  
Class Ii ◽  
Maturation Stage ◽  
Class Ii Malocclusion ◽  
Herbst Appliance ◽  
Lower Lip ◽  
Lower Jaw ◽  
Profile Changes ◽  
The Difference ◽  
Mandibular Retrusion

Background: To evaluate the profile changes following orthopedic/orthodontic treatment with the Herbst Miniscope® appliance in subjects affected with Class II malocclusion with mandibular retrusion. Methods: A total of 44 patients presenting a skeletal Angle Class II malocclusion (ANB > 4°) due to mandibular retrusion and a cervical maturation stage between CS2 and CS3 were included in the study. Of these 44 patients, 22 (mean age 11.9 ± 1.3, HBT group) were treated using the Herbst appliance, while 22 (mean age 10.6 ± 1.3, CTR group) were followed for a 12-month observational period. A cephalometric tracing was performed at the beginning of treatment (T0) and after 12 months (T1). Results: In both groups there was a significant advancement of soft tissue pogonion (HBT = 3.5 ± 3.0 mm, p < 0.001; CTR = 2.2 ± 2.9 mm, p < 0.001), but the difference between the two groups was not significant (p = 0.172). On the contrary, both groups had a significant advancement of the mandibular sulcus (HBT = 3.7 ± 2.8 mm, p < 0.001; CTR = 1.2 ± 2.2 mm, p < 0.001) and a lower lip protrusion (HBT = 3.45 ± 2.51 mm, p < 0.001; CTR = 1.7 ± 2.7 mm, p = 0.008), but in both cases the HBT group showed a statistically significant greater increase in sulcus protrusion (p = 0.002) and lower lip protrusion (p = 0.029) than controls. There were no statistically significant effects on the upper jaw. Conclusions: The Herbst appliance advanced the lower jaw soft tissues.

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