Cephalometric Changes Produced by the Distal Jet and Pendulum Appliances in Class II Malocclusion Treatment

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 > 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) > 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.

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Class II malocclusion treatment changes with the Jones jig, Distal jet and First Class appliances

Journal of Applied Oral Science ◽

10.1590/1678-7757-2019-0364 ◽

2020 ◽

Vol 28 ◽

Author(s):

Lorena VILANOVA ◽

José Fernando Castanha HENRIQUES ◽

Mayara Paim PATEL ◽

Rachelle Simões REIS ◽

Roberto Henrique da Costa GREC ◽

...

Keyword(s):

Class Ii ◽

Class Ii Malocclusion ◽

Treatment Changes ◽

Distal Jet

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

Dental Press Journal of Orthodontics ◽

10.1590/2177-6709.24.6.056-064.oar ◽

2019 ◽

Vol 24 (6) ◽

pp. 56-64 ◽

Cited By ~ 1

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.

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Early treatment outcomes of class II malocclusion with twin-block facial profile and cephalometric changes

Journal of Oral Biology and Craniofacial Research ◽

10.1016/s2212-4268(12)60015-3 ◽

2012 ◽

Vol 2 (1) ◽

pp. 61-66 ◽

Cited By ~ 1

Author(s):

Mousumi Goswami Singh ◽

Pallavi Vashisth ◽

Seema Chaudhary ◽

Ashish Sinha

Keyword(s):

Treatment Outcomes ◽

Early Treatment ◽

Class Ii ◽

Class Ii Malocclusion ◽

Facial Profile ◽

Twin Block ◽

Cephalometric Changes

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Comparison of dentoalveolar, skeletal and soft tissue changes of the treatment of Class II malocclusion with three different intraoral distalization systems: Jones jig, Distal jet and First Class

10.11606/d.25.2017.tde-25102021-182309 ◽

2017 ◽

Author(s):

Lorena Vilanova Freitas de Souza

Keyword(s):

Soft Tissue ◽

Class Ii ◽

Class Ii Malocclusion ◽

Tissue Changes ◽

Soft Tissue Changes ◽

Distal Jet

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Class II malocclusion treatment with the Herbst appliance in patients after the growth peak

Dental Press Journal of Orthodontics ◽

10.1590/s2176-94512013000500008 ◽

2013 ◽

Vol 18 (5) ◽

pp. 38-45 ◽

Cited By ~ 5

Author(s):

José Carlos de Castro Alvares ◽

Rodrigo Hermont Cançado ◽

Fabrício Pinelli Valarelli ◽

Karina Maria Salvatore de Freitas ◽

Christian Zamberlan Angheben

Keyword(s):

Class Ii ◽

Wilcoxon Test ◽

Effective Length ◽

Class Ii Malocclusion ◽

Test Results ◽

Herbst Appliance ◽

Lateral Cephalograms ◽

Treatment Onset ◽

Cephalometric Changes ◽

Mean Time

OBJECTIVE: The objective of this study was to evaluate dentoskeletal effects in the treatment of Class II malocclusion performed with the Herbst appliance in patients at post-peak stage of growth. METHODS: The sample consisted of 16 patients with Class II malocclusion and average initial and final ages of 14.04 (ranging from 11.50 to 35.66) and 17.14 (ranging from 13.68 to 38.64) years, respectively, who were treated for an mean time of 2.52 years. Lateral cephalograms were obtained at treatment onset (T1) and completion (T2) to evaluate the effects of therapy. Initial dental casts were also used to evaluate the overjet and the anteroposterior severity of molar relationship at treatment onset. The cephalometric changes between initial and final stages were compared by means of the non-parametric Wilcoxon test. RESULTS: The results showed that the Herbst appliance did not promote significant changes in the maxillary component and the effective length of the mandible significantly increased without improving the maxillomandibular relationship. Changes in the maxillary and mandibular dentoalveolar components revealed that the maxillary incisors exhibited retrusion and lingual tipping, while the mandibular incisors presented increased protrusion and buccal tipping. The dental relationships exhibited significant improvements with the treatment. CONCLUSION: Based on the present results, it was concluded that the effects of treatment performed with the Herbst appliance in patients at post-peak stage of growth are predominantly of dentoalveolar nature.

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Stability of Class II malocclusion treatment with the Distal Jet followed by fixed appliances

10.11606/d.25.2017.tde-16122021-103133 ◽

2017 ◽

Author(s):

Sorilee Carlina Ramon Pujols

Keyword(s):

Class Ii ◽

Class Ii Malocclusion ◽

Fixed Appliances ◽

Distal Jet

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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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