Comparative effects of the Mandibular Protraction Appliance in adolescents and adults

ABSTRACT Objective: The aim of this study was to compare the skeletal, dental, and soft tissue effects of the Mandibular Protraction Appliance (MPA) application in adolescent and adult Class II malocclusion patients. Methods: The sample comprised the pretreatment and posttreatment lateral cephalograms of 39 subjects presenting Class II malocclusion treated with the MPA and fixed appliances. Sample was divided into two groups: Group 1 comprised 23 subjects (10 male; 13 female), at a mean pretreatment age of 11.75 years, with a mean treatment time of 3.32 years; Group 2 included 16 subjects (7 male; 9 female), at a mean pretreatment age of 22.41 years, with a mean treatment time of 4.24 years. Intergroup comparison of the initial and final stages and treatment changes between the groups was performed with t tests, at p< 0.05. Results: The adults showed less significant amounts of skeletal, dentoalveolar and soft tissue changes than the adolescents. There was significantly greater palatal tipping of the maxillary incisors and retrusion of the upper lip in the adolescents. The adult group showed greater mandibular incisor proclination in the posttreatment stage. Conclusion: Adult patients treated with MPA showed less significant amounts of skeletal, dentoalveolar and soft tissue changes than adolescents.

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Comparison of Soft Tissue Changes Between Two Class II Malocclusion Treatment Protocols: with and without Extractions Associated to Intermaxillary Elastics

Journal of Health Sciences ◽

10.17921/2447-8938.2020v22n4p204-209 ◽

2020 ◽

Vol 22 (4) ◽

pp. 204-209

Author(s):

Honório Tóttoli Segundo ◽

Victor França Didier ◽

Renata Rodrigues de Almeida-Pedrin ◽

Ana Cláudia de Castro Ferreira Conti ◽

Marcio Rodrigues de Almeida ◽

...

Keyword(s):

Soft Tissue ◽

Treatment Time ◽

Class Ii ◽

Treatment Modalities ◽

Class Ii Malocclusion ◽

Lower Lip ◽

Tissue Changes ◽

Group 2 ◽

Soft Tissue Changes ◽

Group 1

AbstractThe literature is scarce on the intermaxillary elastics impacts on soft tissue during the treatment of Class II malocclusion The purpose of the present study was to compare the soft tissue changes after the treatment of Class II malocclusion using intermaxillary elastics with and without the premolars extraction. The sample consisted of 41 patients Class II Division 1 malocclusion with bilateral molar relationship of at least ½ cusp, divided into two groups. Group 1: 21 patients (mean age 18.97 years) treated for a mean period of 3.15 years with intermaxillary elastics without dental extractions. Group 2: 20 patients (mean age,17.40 years) treated for a mean period of 3.07 years with intermaxillary elastics and extraction of two maxillary premolars. Lateral cephalometric radiographs were used to measure the soft tissue and incisor variations before and after orthodontic treatment. Dolphin Imaging Premium software was used for radiographic analysis. Groups 1 and 2 were highly similar concerning age, initial overjet, molar relationship, treatment time, and initial cephalometric measurements. Statistically significant differences between both groups were observed (P<0.05) related to the anteroposterior position of the lower lip in Group 2 and facial convexity angle in Group 1. Conclusions: Both treatment modalities promoted similar effects on the facial profile, except for the greater retrusion of the lower lip in the protocol with extractions and decrease in the facial convexity in the protocol without extractions. Keywords: Malocclusion. Angle Class II. Orthodontics. Orthodontic Anchorage Procedures. Tooth Extractions ResumoA literatura é escassa quanto ao impacto dos elásticos intermaxilares nos tecidos moles durante o tratamento da má oclusão de classe II. O objetivo deste trabalho foi comparar as alterações tegumentares do tratamento da má oclusão de Classe II com elásticos intermaxilares sem extração e com extrações de pré-molares. A amostra retrospectiva foi de 41 indivíduos que apresentavam no início do tratamento relação molar de no mínimo 1/2 Classe II bilateral e foram divididos em dois grupos. Grupo 1: 21 pacientes (média de idade inicial de 18,97 anos), tratados por um período médio de 3,15 anos, sem extrações e com uso elásticos intermaxilares; Grupo 2: 20 pacientes (média de idade de 17,40 anos), tratados por um período médio de 3,07 anos, com extrações de dois pré-molares superiores e elásticos. As telerradiografias foram usadas para aferir as medidas tegumentares e a variação dos incisivos antes e depois do tratamento ortodôntico através do software Dolphin Imaging Premium 11.7. Ambos os grupos mostraram alto grau de compatibilidade nos quesitos idade, overjet inicial, relação molar, tempo de tratamento e medidas cefalométricas iniciais. Os resultados ao final do tratamento mostraram diferença estatisticamente significante entre os grupos (p<0,05) na posição anteroposterior do lábio inferior (Grupo 2) e no ângulo de convexidade facial (Grupo 1). Conclusões: As duas modalidades de tratamento promovem efeitos semelhantes no perfil facial, exceto pela maior retrusão do lábio inferior no protocolo com extrações e diminuição da convexidade facial no protocolo sem extrações. Palavras-chave: Má Oclusão de angle classe II. Ortodontia. Procedimentos de Ancoragem em Orthodontia. Extração Dentária.

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Maxillary premolars extraction or molar distalization with or without TADs: cephalometric evaluation of soft tissue changes in Class II treatment

South European Journal of Orthodontics and Dentofacial Research ◽

10.5937/sejodr7-23776 ◽

2020 ◽

Vol 7 (1) ◽

pp. 4-11

Author(s):

Lorenz Moser ◽

Enrica Di Lorenzo ◽

Marco Serafin ◽

Giuliano Maino ◽

Ute Schneider-Moser ◽

...

Keyword(s):

Soft Tissue ◽

Class Ii ◽

Growth Spurt ◽

Class Ii Malocclusion ◽

Premolar Extraction ◽

Class Ii Treatment ◽

Lateral Cephalograms ◽

Tissue Changes ◽

Pendulum Appliance ◽

Soft Tissue Changes

Introduction: Problem solving in Class II malocclusion treatment performed with premolars extractions or distalizing techniques in relation to the profile modification. Aim: To cephalometrically compare soft tissue changes produced either by maxillary premolar extraction, tooth-borne Pendulum appliance or bone-borne MGBM appliance. Materials and Methods: Both pre- (T1) and post-treatment (T2) lateral cephalograms of 89 skeletal Class II patients (36 M, 53 F), treated during pubertal growth spurt, were retrospectively selected. Three groups were formed based on the therapy performed: 30 patients had been treated with maxillary first premolars extraction (U4), 31 patients with a conventional tooth-borne distalizing with Pendulum appliance (PA), and 28 patients with a skeletally anchored distalizing appliance (MGBM). Soft tissue was analyzed comparing upper (UL) and lower (LL) lip’s points with regard to True Vertical Line (TVL) and Esthetic plane (E-plane). Skeletal and dental values have been recorded in order to cephalometrically compare ΔT2-T1 changes among groups and to correlate dental and skeletal changes to profile modifications. One-way ANOVA was employed to compare groups at T1. Paired sample t-tests were employed to assess significant intra- and intergroup differences between T2 and T1. Significance level was set at 0.05 Results: UL and LL showed a slight but not significant retrusion relative to TVL in all three groups. UL and LL distances to E-plane were not statistically significant among U4, PA, and MGBM groups. Independently of the treatment, UL was tangent to TVL in all groups. No statistically significant differences have been shown in skeletal records. Significant differences were recorded in Overjet among U4 than PA and MGBM groups. Conclusions: Class II malocclusion treatment with maxillary first premolar extraction, conventional or skeletal distalization did not significantly affect the profile producing similar changes in the soft tissue.

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Class II malocclusion treatment effects with Jones Jig and Distal Jet followed by fixed appliances

The Angle Orthodontist ◽

10.2319/022517-142.1 ◽

2017 ◽

Vol 88 (1) ◽

pp. 10-19 ◽

Cited By ~ 3

Author(s):

Lorena Vilanova ◽

José Fernando Castanha Henriques ◽

Guilherme Janson ◽

Mayara Paim Patel ◽

Rachelle Simões Reis ◽

...

Keyword(s):

Soft Tissue ◽

Class Ii ◽

Occlusal Plane ◽

Control Group ◽

Class Ii Malocclusion ◽

Mandibular Incisor ◽

Tissue Changes ◽

Fixed Appliances ◽

Soft Tissue Changes ◽

Distal Jet

ABSTRACT Objectives: To compare the skeletal, dentoalveolar, and soft tissue changes in Class II malocclusion patients treated with Jones Jig and Distal Jet distalizers followed by fixed appliances. Materials and Methods: The experimental groups comprised 45 Class II malocclusion subjects divided into two groups. Group 1 consisted of 25 patients treated with the Jones Jig, and group 2 consisted of 20 patients treated with the Distal Jet. Group 3 comprised 19 untreated Class II subjects. Cephalograms were analyzed before and after orthodontic treatment. For intergroup comparisons, one-way analysis of variance and post hoc Tukey tests were performed. Results: During treatment, the experimental groups exhibited significant increases in occlusal plane inclination and maxillary second molar mesial tipping. Additionally, the molar relationship improved and overjet decreased significantly in the experimental groups. The Jones Jig group showed greater mandibular incisor proclination and greater overbite reduction than the control group. No significant intergroup differences in nasolabial angle changes were found. Conclusions: Treatment protocols using the Jones Jig and Distal Jet followed by fixed appliances were effective in correcting Class II malocclusion by means of dentoalveolar changes without significant skeletal and soft tissue changes. The experimental groups showed occlusal plane clockwise rotation and greater mesial tipping of maxillary second molars when compared to the untreated group.

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Soft-tissue changes after Class II malocclusion treatment using the Sander bite-jumping appliance: a retrospective study

Minerva Stomatologica ◽

10.23736/s0026-4970.19.04197-9 ◽

2019 ◽

Vol 68 (3) ◽

Cited By ~ 1

Author(s):

Michele Tepedino ◽

Maria V. Della Noce ◽

Domenico Ciavarella ◽

Patrizia Gallenzi ◽

Massimo Cordaro ◽

...

Keyword(s):

Retrospective Study ◽

Soft Tissue ◽

Class Ii ◽

Class Ii Malocclusion ◽

Tissue Changes ◽

Soft Tissue Changes

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Maxillary incisors initial position and soft-tissue changes in Class II malocclusion extraction protocols

10.11606/t.25.2016.tde-09122021-110010 ◽

2016 ◽

Author(s):

Lucas Marzullo Mendes

Keyword(s):

Soft Tissue ◽

Class Ii ◽

Initial Position ◽

Class Ii Malocclusion ◽

Tissue Changes ◽

Maxillary Incisors ◽

Soft Tissue Changes

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Comparison of dentoskeletal and soft tissue effects of Class II malocclusion treatment with Jones Jig appliance and with maxillary first premolar extractions

Dental Press Journal of Orthodontics ◽

10.1590/2177-6709.24.2.056-065.oar ◽

2019 ◽

Vol 24 (2) ◽

pp. 56-65

Author(s):

Daniela Cubas Pupulim ◽

José Fernando Castanha Henriques ◽

Guilherme Janson ◽

Fernanda Pinelli Henriques ◽

Karina Maria Salvatore Freitas ◽

...

Keyword(s):

Soft Tissue ◽

Treatment Time ◽

Class Ii ◽

Treatment Protocols ◽

Soft Tissue Profile ◽

Lateral Cephalograms ◽

Division 1 ◽

Treatment Changes ◽

Group 2 ◽

Cephalometric Changes

Abstract Objective: The aim of this study was to compare the cephalometric changes in Class II division 1 malocclusion patients treated with Jones Jig appliance or with maxillary first premolar extractions. Methods: The sample consisted of 88 lateral cephalograms of 44 patients, divided into two groups. Group 1 consisted of 21 patients treated with Jones Jig appliance, with a mean initial age of 12.88 ± 1.23 years and final mean age of 17.18 ± 1.37 years, and a mean treatment time of 4.29 years. Group 2 comprised 23 patients treated with maxillary first premolar extractions, with a mean initial age of 13.59 ± 1.91 years and mean final age of 16.39 ± 1.97 years, and a mean treatment time of 2.8 years. Intergroup treatment changes were compared with t and Mann-Whitney tests. Results: Class II correction in G2 (maxillary first premolar extractions) presented significantly greater maxillary retrusion, reduction of anteroposterior apical base discrepancy, smaller increase in the lower anterior face height and significantly greater overjet reduction than G1 (Jones Jig). Conclusions: Treatment with maxillary first premolar extractions produced greater overjet reduction, but the two treatment protocols produced similar changes in the soft tissue profile.

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Comparison of AdvanSync2® and Twin Block Appliances in Treatment of Class II Malocclusion With Retrognathic Mandible—An Observational Retrospective Study

The Journal of Indian Orthodontic Society ◽

10.1177/03015742211057241 ◽

2021 ◽

pp. 030157422110572

Author(s):

Ankit Kumar Shahi ◽

Payal Sharma ◽

Achint Juneja ◽

Divya Shetty ◽

Rishibha Bhardwaj ◽

...

Keyword(s):

Soft Tissue ◽

Class Ii ◽

T Test ◽

Growth Spurt ◽

Class Ii Malocclusion ◽

Twin Block ◽

Group I ◽

Tissue Changes ◽

Group Ii ◽

Soft Tissue Changes

Objectives: To evaluate the treatment outcomes between Twin Block and AdvanSync2® appliances by comparing the skeletal, dentoalveolar, and soft tissue changes. Materials and Methods: Radiographic data of 20 patients were retrospectively analyzed. Data were selected from patients in their skeletal growth spurt as evaluated by the cervical vertebral maturation method (CVMI 2, 3, and 4), with class II malocclusion characterized with retrognathic mandible (ANB > 4°, SNB < 77°, FMA = 25 ± 5°, overjet > 5 mm). There were 10 patients in each group that underwent orthodontic correction for class II malocclusion: either using Twin Block or AdvanSync2®. Independent t test and Paired t test and chi-square tests were used for the data analysis. The level of statistical significance was set at P value ≤.05. Results: The chronological and skeletal age were similar in both the groups. Records were taken for the functional treatment with mean treatment span of 8 ± 1 month. Changes in SNB (group I = 1.59°, group II = 3.11°) ( P < .01), Co-Gn (group I = 2.89 mm, group II = 5.34 mm), and U1-L1° (group I = −1.51°, group II = 2.97°) showed statistically different outcome between the groups, when the pre-post data were studied. Rest of the variables—cranial base, maxillary skeletal, mandibular skeletal, intermaxillary, vertical skeletal, maxillary dentoalveolar, mandibular dentoalveolar, and soft tissue—showed similar outcome ( P > .05). Conclusion: Both appliances lead to desirable outcomes in the correction of class II malocclusion. AdvanSync2® resulted in inducing more of changes in SNB and effective mandibular length as compared to Twin Block. Overjet and molar relation improved significantly with both the appliances. Both the appliances resulted in similar skeletal, dentoalveolar, and soft tissue changes.

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Comparative evaluation of Skeletal, Dental, and Soft Tissue Changes in Class II Division 1 Malocclusion Cases Treated with Twin Block and innovative Clear Block Appliance - A Prospective Interventional Study

International Journal of Research in Pharmaceutical Sciences ◽

10.26452/ijrps.v12i2.4666 ◽

2021 ◽

Vol 12 (2) ◽

pp. 1238-1246

Author(s):

Ankita Agrawal ◽

Narendra Sharma ◽

Ranjit Kamble ◽

Sunita Shrivastav ◽

Shriya Prakash Murarka ◽

...

Keyword(s):

Soft Tissue ◽

Class Ii ◽

Lateral Cephalogram ◽

Twin Block ◽

Division 1 ◽

Tissue Changes ◽

Pre Treatment ◽

Group 2 ◽

Soft Tissue Changes ◽

Group 1

The present study was undertaken to evaluate and compare the skeletal, dental, and soft tissue changes in skeletal Class II division 1 cases treated with Twin Block and Clear Block appliances using a cephalogram. A total of 40 patients of age between 12-14 years were randomly divided into two equal groups. Group 1: treated with Twin Block appliance and Group 2: treated with Clear Block appliance. The pre-treatment lateral cephalogram was taken and skeletal, dental, and soft tissue parameters were evaluated and the appliance was delivered. After 8 months, another lateral cephalogram of all the cases was taken and analyzed. The pre and post-treatment values were compared between the two groups. The pre-treatment cases were almost comparable in skeletal, dental, and soft tissue features in both groups. There was a significant change in mandibular growth by SNB angle. The retrusion and extrusion of maxillary incisors as well as a proclination and extrusion of mandibular incisors were seen in group 1 while no change was observed in group 2. Treatment with Clear Block appliances has shown significant and favorable Skeletal, Dental and Soft tissue changes which are similar to already proven by the Twin Block appliance. Clear Block provides an esthetic and less bulky option for growth modification with similar results as compared to conventional Twin Block with the additional benefit of preventing lower incisor proclination.

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