Correction of Class II division 2 with crowding and bilateral fully transposed impacted mandibular canines

The dentoskeletal characteristics of Class II malocclusion subjects were evaluated using cephalometric radiograph and dental cast of 60 untreated patients. The sample included 30 Class II Division 1 and 30 Class II Division 2 malocclusion patients. The inter-canine, inter-premolar, inter-molar, inter-canine alveolar, inter-premolar alveolar, inter-molar alveolar widths are measured on study models. The result showed statistically significant difference between the groups for mandibular inter-canine width only. The cephalometric analysis revealed that SNB angle was responsible for the skeletal sagittal difference between the two groups except for the position of maxillary incisors. No basic difference in dentoskeletal morphology existed between Class II Division 1 and Class II Division 2 malocclusions.

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The British Orthodontic Society MOrth Cases Prize 2019

Journal of Orthodontics ◽

10.1177/1465312520982876 ◽

2021 ◽

pp. 146531252098287

Author(s):

Adam C Jowett

Keyword(s):

Class Ii ◽

Functional Appliance ◽

First Case ◽

Permanent Molars ◽

Fixed Appliances ◽

Unerupted Teeth ◽

Removable Appliance ◽

Division 2 ◽

Lower Arch ◽

First Permanent Molars

This paper describes the orthodontic treatment of two cases that were successful in winning the British Orthodontic Society (BOS) Membership in Orthodontics (MOrth) Cases Prize in 2019. The first case describes the management of a 12-year-old girl with a Class II division 2 malocclusion complicated by moderate upper and lower arch crowding, multiple unerupted teeth, restored lower first permanent molars, pseudo-transposition of the lower left lateral incisor and canine, and diminutive upper lateral incisors. Treatment involved a combination of an upper removable appliance followed by upper and lower preadjusted edgewise fixed appliances. Anteroposterior correction and overbite reduction was achieved with triangular Class II elastics with posterior occlusal disengagement. Both upper permanent canines were exposed and aligned, and the diminutive upper incisors built up with resin-based composite. Treatment was completed over a period of 23 months. The second case describes the management of a 13-year-old boy with a Class II division 2 malocclusion complicated by severe upper and lower arch crowding with unerupted UR5, UL4, LR3, rotated LR5, an increased overbite complete to tooth, buccally displaced upper canines and hypoplastic upper first premolars. Treatment involved a first phase of functional appliance therapy, followed by the extraction of UR4, UL4, LL5, LR4 and upper and lower preadjusted edgewise fixed appliances over a 28-month period.

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Comparative Evaluation of Adenoids, Upper Airway, and Tongue Using “Predictors of Difficult Airways” in Class II Division 1 and Division 2 Cases with Class I Cases: Prospective In Vivo Observational Study

The Journal of Indian Orthodontic Society ◽

10.1177/0301574220963411 ◽

2021 ◽

pp. 030157422096341

Author(s):

Smita Mangesh Choudhari ◽

Sunita Shrivastav

Keyword(s):

Significant Positive Correlation ◽

Upper Airway ◽

Class Ii ◽

Class I ◽

Positive Correlation ◽

Division 1 ◽

Difficult Airways ◽

Mandibular Protrusion ◽

Division 2 ◽

Class Ii Division 1

Introduction: Altered nasorespiratory function leads to altered craniofacial growth. Thus, airway evaluation is important for preventive, interceptive, and corrective orthodontic treatment. The aim of this study was to evaluate and compare adenoids, the upper airway, the tongue, and mandibular dimensions using “predictors of difficult airways” in class II division 1 and class II division 2 cases with class I cases. Method: Sixty subjects of age 15 to 18 years were divided into 3 groups (group 1: class I cases; group 2: class II division 1 cases; and group 3: class II division 2 cases) based on cephalometric parameters, with 20 cases in each group. Cephalometric evaluation of adenoids and the nasopharyngeal airway was done using the Handelman–Osborne area method. Upper and lower airway evaluation was done using McNamara’s linear method. “Predictors of difficult airways” were used for evaluation of the airway, which included nasal competency, the Mallampati scale, mandibular length, mandibular protrusion, and the thyromental distance. Results: The present study found a significant positive correlation between the grades of nasal competency and percentage adenoid wall area, and a significant negative correlation between the grades of nasal competency and the upper airway. There was a significant positive correlation between the grades of nasal competency and mandibular length, and a significant positive correlation between the grades of mandibular protrusion and mandibular length. There was a significant positive correlation between the grades of the thyromental distance and mandibular length. Conclusion: It was concluded that the “predictors of difficult airways” would be helpful in early diagnosis and identification of potential risk factors that may cause “breathing disorders”–related malocclusions and later on increase the risk of developing OSA.

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Mandibular Asymmetry in Different Occlusion Patterns

The Angle Orthodontist ◽

10.2319/092506-392 ◽

2007 ◽

Vol 77 (5) ◽

pp. 803-807 ◽

Cited By ~ 26

Author(s):

Omer Said Sezgin ◽

Peruze Celenk ◽

Selim Arici

Keyword(s):

Class Ii ◽

Asymmetry Index ◽

Control Group ◽

Class Iii ◽

Mandibular Asymmetry ◽

Normal Occlusion ◽

Division 1 ◽

Index Value ◽

Age Range ◽

Division 2

Abstract Objective: To investigate the effects of different occlusion types on the mandibular asymmetry in young individuals. Materials and Methods: Mandibular asymmetry measurements were performed on the panoramic radiographs of 189 subjects (104 females and 85 males; age range, 11–15 years), with different occlusion patterns. The subjects were divided into five groups according to the occlusion types, namely, Angle Class I (Cl I), Class II division 1 (Cl II/1), Class II division 2 (Cl II/2), Class III (Cl III), and normal occlusions. The Kruskal-Wallis test was used to determine the possible statistically significant differences between the groups for condyle, ramus, and condyle-plus-ramus asymmetry index measurements. Identified differences between groups were further analyzed using the Mann-Whitney U-test at the 95% confidence interval (P < .05). Results: There were no statistically significant differences between male and female subjects. The Kruskal-Wallis test showed that the occlusion type had a significant effect on the condylar asymmetry. In Cl II/1 cases, condylar asymmetry values were significantly different from the values of Cl II/2 and Cl III malocclusion and normal occlusion types. The normal occlusion control group was significantly different from those of Cl II/1 and the Cl I malocclusion groups. Conclusion: Cl II/1 malocclusion has a significant effect on the condylar asymmetry index when compared to Cl II/2 and Cl III malocclusion and normal occlusion types. However, the mean condylar asymmetry index value in Cl II/1 malocclusion was not different from Cl I malocclusion.

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Nonextraction treatment of severe class II, division 2 malocclusions

American Journal of Orthodontics and Dentofacial Orthopedics ◽

10.1016/s0889-5406(05)80032-0 ◽

1990 ◽

Vol 97 (6) ◽

pp. 510-521 ◽

Cited By ~ 8

Author(s):

Michael G. Arvystas

Keyword(s):

Class Ii ◽

Division 2

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Arch Widths in Class II-2 Adults Compared to Adults with Class II-1 and Normal Occlusion

The Angle Orthodontist ◽

10.2319/062305-209 ◽

2007 ◽

Vol 77 (5) ◽

pp. 837-844 ◽

Cited By ~ 14

Author(s):

Joel Huth ◽

Robert Newton Staley ◽

Richard Jacobs ◽

Harold Bigelow ◽

Jane Jakobsen

Keyword(s):

Class Ii ◽

White Americans ◽

Gender Dimorphism ◽

Arch Width ◽

Normal Occlusion ◽

Division 1 ◽

History Of ◽

Division 2 ◽

Male Subjects ◽

Female Subjects

Abstract Objective: To compare (1) arch widths in adults with Class II division 2 (II-2), Class II division 1 (II-1), and Class I normal occlusions, (2) genders, (3) gender dimorphism, (4) differences between maxillary and mandibular arch widths, and to (5) develop adult norms for arch widths. Materials and Methods: Subjects were white Americans with no history of orthodontic treatment. Arch width dimensions measured were: intercanine, intermolar, and molar alveolar in both arches. Analysis of variance (ANOVA) and Duncan's test were used to compare groups. Results: Comparison of pooled genders showed the II-2 group had maxillary arch widths significantly smaller than the normal occlusions and significantly larger than the II-1 group. All groups had similar mandibular intercanine and alveolar widths. The II-2 and II-1 groups had similar mandibular intermolar widths, both significantly smaller than normal occlusions. The II-2 group had a maxillary/mandibular intermolar difference significantly smaller than the normal occlusions, and significantly less negative than the II-1 group. Gender comparisons in two of six widths showed normal and II-2 male subjects were similar, and in six of six widths normal and II-2 female subjects were similar; in five of six widths II-2 and II-1 male and female subjects were similar. Gender dimorphism occurred in five of six widths in normal occlusions, four of six widths in II-2, and one of six widths in II-1. Conclusions: Arch width dimensions of II-2 subjects were intermediate between normal and II-1 occlusions. In both Class II malocclusions, the process that narrows arch widths was more pronounced in male than in female subjects.

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