Biomechanic Strategies for Nonextraction Class II Malocclusions

Nanda, Ram S.; Dandajena, Tarisai C.; Nanda, Ravindra

doi:10.1016/b978-0-7216-0196-0.50014-x

Cited by 22 publications

(31 citation statements)

References 27 publications

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“…Like other fixed intermaxillary appliances, it is used full time because it is not subject to patient compliance. 9 Before delivering the TFBC, the orthodontic mechanics included fixed Roth preadjusted braces with 0.022 3 0.028-inch slots and archwires that were progressively increased until 0.019 3 0.025-inch stainless-steel wires could be used in both arches. In order to counteract the buccal flaring of the maxillary molars with the use of the TFBC appliance, a transpalatal arch was placed, and both archwires ends were cinched back 90u against the distal side of the molar tubes.…”

Section: Clinical Materialsmentioning

confidence: 99%

Prospective study of dentoskeletal changes in Class II division malocclusion treatment with twin force bite corrector

Guimarães

Henriques

Janson

et al. 2012

The Angle Orthodontist

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Objective: To evaluate the dentoskeletal changes of Class II malocclusion treatment with the Twin Force Bite Corrector (TFBC). Materials and Methods: The sample comprised 86 lateral cephalograms obtained from 43 subjects with Class II division 1 malocclusion; the subjects were divided into two groups. The experimental group comprised 23 patients with a mean initial age of 12.11 years who were treated with the TFBC for a mean period of 2.19 years. The control group included 40 lateral cephalograms from 20 Class II nontreated patients, with an initial mean age of 12.55 years and a mean observation period of 2.19 years. The lateral cephalograms were evaluated before and after orthodontic treatment in group 1 and in the beginning and end of the observation period in group 2. t-Tests were used to compare the initial and final cephalometric characteristics of the groups as well as the amount of change. Results: The experimental group presented greater maxillary growth restriction and mandibular retrusion than the control group, as well as greater maxillomandibular relationship improvement and greater labial tipping of the mandibular incisors. The results also showed a greater decrease in overbite and overjet in the experimental group, and there were no statistically significant differences in the craniofacial growth pattern between groups. Conclusions: The TFBC promotes restriction of anterior maxillary displacement without significant changes in mandibular length and position and improvement of maxillomandibular relationship without changes in facial growth and significant buccal tipping of mandibular incisors. Class II correction with the TFBC occurred primarily as a result of dentoalveolar changes.

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Section: Clinical Materialsmentioning

confidence: 99%

Prospective study of dentoskeletal changes in Class II division malocclusion treatment with twin force bite corrector

Guimarães

Henriques

Janson

et al. 2012

The Angle Orthodontist

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“…11) Overbite (the vertical distance measured between two horizontal lines passing through incisal edges of U1 and L1 perpendicular to the y-axis; vertical plane perpendicular to the x-axis). (12) The perpendicular distance between the PP and the mesiobuccal cusp tip of U7. (13) The perpendicular distance between the MP and the mesiobuccal cusp tip of L7.…”

Section: Resultsmentioning

confidence: 99%

Effect of maxillary and mandibular extrusion arches on dentoskeletal changes in adults with anterior open bite: a quantitative analysis

Hammad¹,

Moussa²,

Marzouk³

et al. 2022

The Angle Orthodontist

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Objective To quantify dentoskeletal changes accompanying the use of extrusion arches during the treatment of anterior open bite (AOB) in adults. Materials and Methods A total of 23 adult patients with an AOB of −3.05 mm ± 1.27 mm were treated with upper and lower extrusion arches after the alignment phase. Lateral cephalograms were taken before placement of the extrusion arch, immediately after closure of the open bite (T2), and at the end of orthodontic treatment (T3). Data were statistically analyzed using repeated-measures analysis of variance and the Bonferroni post hoc test for pairwise comparisons (α = 0.05). Results Successful closure of AOB, with an overall change in overbite of 4.73 ± 1.93 mm, was achieved in an average of 3.8 months and remained stable at T3. Upper and lower incisors were significantly extruded by 2.05 mm ± 0.72 mm and 2.54 mm ± 1.63 mm, respectively, and significantly retroclined by 6.36° ± 1.63° and 8.45° ± 3.83°, respectively, with a resultant increase in the interincisal angle of 12.80° ± 2.09°. Statistically significant intrusion and mesial tipping (P < .001) of the maxillary and mandibular first molars were observed at T2. Dentoskeletal changes remained stable at T3, except for a significant reduction of the mesial tipping of the maxillary and mandibular first molars. Conclusions The combined use of maxillary and mandibular extrusion arches resulted in significant favorable dentoskeletal changes that led to the successful closure of AOB during a short duration of treatment.

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“…We studied CMA morphology in subjects with Angle's class I normal occlusion and subjects with Angle's class II malocclusion because class II malocclusion has been described as most frequent treatment problem in orthodontic practice [ 18 ], and till the date of the planning of the study we did not find any CT study of Craniomandibular articulation morphology reported in literature on subjects with Angle's class I normal occlusion. Hence this finding of present study could be a valuable reference for evaluation and comparison of TMJ morphology in different malocclusions in north Indian population.…”

Section: Discussionmentioning

confidence: 99%

Computed Tomography Evaluation of Craniomandibular Articulation in Class II Division 1 Malocclusion and Class I Normal Occlusion Subjects in North Indian Population

et al. 2012

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Objective. The purpose of this study is to investigate the Craniomandibular articulation morphology and position of condyle in mandibular fossae in Angle's class I normal occlusion and Angle's class II division 1 malocclusion. Materials and Methods. The present study was conducted on 40 subjects with 20 subjects in each group, and the computed tomography images were obtained using spiral computed tomography technique. Each measurement was compared by two-factor analysis of variance (ANOVA) while changes in anterior and posterior joint spaces were done by paired t-test. Results. Statistically significant anterior positioning of condyle (P > 0.05) was observed in class I normal malocclusion, and it was significant only on right side in class II division 1 malocclusion. Conclusions. There was no difference found in the condylar process and joint morphology between right and left sides of both Angle's Class I normal occlusion and Angle's class II division 1 malocclusion. Evaluation of the position of the condyles in their respective mandibular fossae showed concentric position with a tendency towards anterior positioning for both right and left sides of the subjects with Angle's Class I normal occlusion as well as subjects with Angle's class II division 1 malocclusion.

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Biomechanic Strategies for Nonextraction Class II Malocclusions

Cited by 22 publications

References 27 publications

Prospective study of dentoskeletal changes in Class II division malocclusion treatment with twin force bite corrector

Prospective study of dentoskeletal changes in Class II division malocclusion treatment with twin force bite corrector

Effect of maxillary and mandibular extrusion arches on dentoskeletal changes in adults with anterior open bite: a quantitative analysis

Computed Tomography Evaluation of Craniomandibular Articulation in Class II Division 1 Malocclusion and Class I Normal Occlusion Subjects in North Indian Population

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