Three-dimensional skeletal and dentoalveolar sagittal and vertical changes associated with cantilever Herbst appliance in prepubertal patients with Class II malocclusion

2022 ◽  
Author(s):  
Kamilla Leonardo Sangalli ◽  
Kamile Leonardi Dutra-Horstmann ◽  
Gisele Maria Correr ◽  
Francielle Topolski ◽  
Carlos Flores-Mir ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Class Ii ◽  
Class Ii Malocclusion ◽  
Herbst Appliance ◽  
Vertical Changes

Three-dimensional changes of the upper airway in patients with Class II malocclusion treated with the Herbst appliance: A cone-beam computed tomography study

2020 ◽  
Vol 157 (2) ◽  
pp. 205-211 ◽  
Author(s):  
Paula Moreira Oliveira ◽  
Paula Loureiro Cheib-Vilefort ◽  
Henrique de Pársia Gontijo ◽  
Camilo Aquino Melgaço ◽  
Lorenzo Franchi ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Three Dimensional ◽  
Upper Airway ◽  
Class Ii ◽  
Cone Beam ◽  
Class Ii Malocclusion ◽  
Herbst Appliance ◽  
Dimensional Changes

scholarly journals Three-dimensional dental arch changes of patients submitted to orthodontic-surgical treatment for correction of Class II malocclusion

2014 ◽  
Vol 19 (4) ◽  
pp. 71-79 ◽  
Author(s):  
Adriano Porto Peixoto ◽  
Ary dos Santos Pinto ◽  
Daniela Gamba Garib ◽  
João Roberto Gonçalves
Keyword(s):  
Surgical Treatment ◽  
Three Dimensional ◽  
Class Ii ◽  
Dental Arch ◽  
Class Ii Malocclusion ◽  
Dimensional Changes ◽  
Vertical Changes ◽  
Lower Arch ◽  
Maxillary Arch

INTRODUCTION: This study assessed the three-dimensional changes in the dental arch of patients submitted to orthodontic-surgical treatment for correction of Class II malocclusions at three different periods. METHODS: Landmarks previously identified on upper and lower dental casts were digitized on a three-dimensional digitizer MicroScribe-3DX and stored in Excel worksheets in order to assess the width, length and depth of patient's dental arches. RESULTS: During orthodontic preparation, the maxillary and mandibular transverse dimensions measured at the premolar regions were increased and maintained throughout the follow-up period. Intercanine width was increased only in the upper arch during orthodontic preparation. Maxillary arch length was reduced during orthodontic finalization, only. Upper and lower arch depths were stable in the study periods. Differences between centroid and gingival changes suggested that upper and lower arch premolars buccaly proclined during the pre-surgical period. CONCLUSIONS: Maxillary and mandibular dental arches presented transverse expansion at premolar regions during preoperative orthodontic preparation, with a tendency towards buccal tipping. The transverse dimensions were not altered after surgery. No sagittal or vertical changes were observed during the follow-up periods.

scholarly journals Influence of Vertical Facial Growth Pattern on Herbst Appliance Effects in Prepubertal Patients: A Retrospective Controlled Study

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Maria Rita Giuca ◽  
Marco Pasini ◽  
Sara Drago ◽  
Leonardo Del Corso ◽  
Arianna Vanni ◽  
...  
Keyword(s):  
Growth Pattern ◽  
Class Ii ◽  
Growth Patterns ◽  
Response To Treatment ◽  
Controlled Study ◽  
Class Ii Malocclusion ◽  
Facial Growth ◽  
Herbst Appliance ◽  
Lateral Cephalograms ◽  
Vertical Growth Pattern

Introduction. The Herbst device is widely used for correction of class II malocclusions; however, most of the researches carried out on the Herbst appliance in literature do not take into account patients with a different mandibular divergence. The aim of this study was to investigate the effects of Herbst on dental and skeletal structures and to evaluate possible influence of vertical facial growth patterns. Methods. A retrospective study was conducted on lateral cephalograms of 75 growing patients (mean age: 9.9 ± 1.9 years) with class II malocclusion treated with Herbst. Subjects were divided into 3 groups using the mandibular divergence index (SN and GoMe angle). Cephalometric parameters were evaluated using the modified SO (sagittal occlusion) Pancherz’s analysis. A statistical analysis was conducted to evaluate differences among groups using ANOVA. Results. Our study showed differences in response to treatment depending on patient’s facial vertical growth pattern. Cranial base angle and mandibular rotation were significantly different (p<0.05) between hypodivergent patients and normodivergent patients and between hypodivergent and hyperdivergent subjects. Conclusion. Hypodivergent patients increased their mandibular divergence during treatment to a greater extent than normodivergents; moreover, hyperdivergent patients exhibited a decreased mandibular divergence at the end of the treatment.

scholarly journals Three-dimensional positional assessment of glenoid fossae and mandibular condyles in patients with Class II subdivision malocclusion

2017 ◽  
Vol 87 (6) ◽  
pp. 847-854 ◽  
Author(s):  
Juliana Macêdo de Mattos ◽  
Juan Martin Palomo ◽  
Antonio Carlos de Oliveira Ruellas ◽  
Paula Loureiro Cheib ◽  
Manhal Eliliwi ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Sella Turcica ◽  
Class Ii ◽  
Cranial Base ◽  
Class Ii Malocclusion ◽  
Computed Tomographic ◽  
Anterior Cranial Base ◽  
Condylar Position ◽  
Male Patients ◽  
Anterior Posterior

ABSTRACT Objectives: To test the null hypotheses that the positions of the glenoid fossae and mandibular condyles are identical on the Class I and Class II sides of patients with Class II subdivision malocclusion. Materials and Methods: Retrospective three-dimensional (3D) assessments of the positions of the glenoid fossae and mandibular condyles were made in patients with Class II malocclusion. Relative to a fiducial reference at the anterior cranial base, distances from the glenoid fossae and condyles were calculated in pretreatment cone beam computed tomographic scans of 82 patients: 41 with Class II and 41 with Class II subdivision malocclusions. The 3D distances from glenoid fossae to sella turcica in the X (right-left), Y (anterior-posterior), Z (inferior-superior) projections were calculated. Results: Patients with Class II malocclusion displayed a symmetric position of the glenoid fossae and condyles with no statistically significant differences between sides (P &gt; .05), whereas patients with Class II subdivision showed asymmetry in the distance between the glenoid fossae and anterior cranial base or sella turcica (P &lt; .05), with distally and laterally positioned glenoid fossae on the Class II side. (P &lt; .05). Male patients had greater distances between glenoid fossae and anterior cranial fossae (P &lt; .05). The condylar position relative to the glenoid fossae did not differ between the two malocclusion groups nor between males and females (P &gt; .05). Conclusions: The null hypotheses were rejected. Patients with Class II subdivision malocclusion displayed asymmetrically positioned right- and left-side glenoid fossae, with a distally and laterally positioned Class II side, although the condyles were symmetrically positioned within the glenoid fossae.

scholarly journals Anteroposterior and Vertical Changes in Skeletal Class II Patients Treated With Modified Thurow Appliance

2014 ◽  
Vol 25 (2) ◽  
pp. 170-174 ◽  
Author(s):  
Matheus Melo Pithon ◽  
Rogério Lacerda dos Santos ◽  
Gêisa Aiane de Morais Sampaio ◽  
Izaura Helena Chaves de Meneses ◽  
Raildo Silva Coqueiro
Keyword(s):  
Class Ii ◽  
Post Treatment ◽  
Class Ii Malocclusion ◽  
Skeletal Class ◽  
Skeletal Class Ii ◽  
Angular Measurements ◽  
Cervical Traction ◽  
Vertical Changes ◽  
Pre Treatment ◽  
Post Hoc

The aim of this study was to evaluate the post-treatment anteroposterior and vertical alterations in skeletal Class II malocclusion with different maxillary patterns in patients treated with modified Thurow appliance. Forty-five patients (22 girls and 23 boys) with skeletal Class II and angle SN.GoGn ≤ 35 and different maxillary patterns (n=15), as follows: retrusive (SNA<80°), normal (SNA=80°- 84°) or protrusive (SNA>84°) maxilla; mean age 9 years at pre-treatment (T1) and 9 years and 10 months at post-treatment (T2), were treated with modified Thurow cervical traction appliance, with expander screw and extraoral face bow with 10° to 20° fold in relation to the intraoral arch. Force of 500 gf was applied and use for 12 to 14 h/day, with fortnightly adjustments. Analysis of variance ANOVA followed by post-hoc Tukey and Kruskal-Wallis test, followed by Mann-Whitney were used (α=5%). In changes obtained from stage T1 to T2, no statistically significant differences were found among the groups Protrusive, normal and retrusive maxilla for the variables SNB, SN.GoGn, 1.NA, overjet, overbite and Class II discrepancy (right and left) (p>0.05). Angular measurements SNA and ANB in the protrusive maxilla group were significantly greater than in the normal and retrusive maxilla groups (p<0.01). However, in the normal maxilla group these values did not differ significantly from those of the retrusive maxilla group (p>0.05). Within the limits of this study, it may be concluded that the modified Thurow cervical traction appliance was efficient for the correction of skeletal Class II irrespective of the maxillary pattern. The mandible had no significant rotation during treatment.

scholarly journals Herbst Appliance palatally anchored in the treatment of dental class II malocclusion

2021 ◽  
Vol 7 (2(S)) ◽  
pp. 21-24
Author(s):  
Bruno Di Leonardo ◽  
Luca Contardo ◽  
Riccardo Riatti
Keyword(s):  
Treatment Time ◽  
Class Ii ◽  
Class Ii Malocclusion ◽  
Maxillary Expansion ◽  
Herbst Appliance ◽  
Short Treatment ◽  
Facial Esthetics ◽  
Spontaneous Correction ◽  
Dentoalveolar Compensation

In this case report, Authors describe the correction of a class II malocclusion using only an Herbst appliance palatally anchored with miniscrews. Before sagittal correction in the same appliance we applied a palatal screw to obtain maxillary expansion. The device were removed after 12 months of treatment. The final result included the correction of Class II malocclusion by lower dentoalveolar compensation mainly. The lip function favorite the spontaneous correction of upper frontal torque with consequent improvement of facial esthetics. After a follow up of 12 months the clinical result is satisfactory in terms of occlusion and esthetics. This clinical case showed a simple orthopedic and dentoalveolar approach to correct transversal discrepancy, dental class II malocclusion and also frontal proclination only with one appliance in a very short treatment time.

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