Evaluation of the dental arch asymmetry in natural normal occlusion and Class II malocclusion individuals

Aim: To evaluate possible differences of the upper and lower dental arches width among youths with Class I,normal occlusion and Class II, division 1 malocclusion. Materials and Methods: The evaluation was conducted on 100 pairs of dental casts of Bangladeshi youths with permanent dentition, 50 with Class I, normal occlusion (22 males and 28 females) at the mean age of 19±3 years and 50 with Class II, division 1, malocclusion (18 males and 32 females ) at the mean age of 20±4 years. The group with Class II malocclusion was divided into two categories: Class II without dental crowding and Class II with dental crowding. A comparison was made between the intercanine inter first premolar and intermolar widths of both dental arches. Results: Subjects with Class II, division, 1 malocclusion when compared with Class I normal occlusion presented (a) in the upper dental arch , smaller intermolar, interpremolar and intercanine width. (b) in the lower dental arch , smaller intermolar width. DOI: http://dx.doi.org/10.3329/bjodfo.v2i2.16159 Ban J Orthod & Dentofac Orthop, April 2012; Vol-2, No.2, 18-23

Download Full-text

Class II Division 1 malocclusion treatment using TADs: Case report

Stomatoloski glasnik Srbije ◽

10.2298/sgs2003159p ◽

2020 ◽

Vol 67 (3) ◽

pp. 159-164

Author(s):

Tina Pajevic ◽

Jovana Juloski ◽

Marija Zivkovic

Keyword(s):

Case Report ◽

Orthodontic Treatment ◽

Class Ii ◽

Dental Arch ◽

Class Ii Malocclusion ◽

Posterior Teeth ◽

Temporary Anchorage Devices ◽

Division 1 ◽

Incisor Retraction ◽

Class Ii Division 1

Introduction. Orthodontic treatment of Class II Division 1 (II/1) malocclusions in adults can be challenging since skeletal effects are limited. Possible treatment options are orthodontic camouflage or orthognatic surgery, in severe cases. The aim of this paper was to present a successful management of Class II malocclusion in an adult patient using temporary anchorage devices (TADs). Case report. After detailed clinical examination, study models and cephalometric analysis, a 26 years old patient was diagnosed with Class II malocclusion, an overjet of 12 mm, congenitally missing tooth 41 and midline shifted to the right in upper dental arch. In prior orthodontic treatment, patient had upper premolars extracted. Posterior teeth in upper left quadrant were shifted mesially. The camouflage treatment was considered, using temporary anchorage devices (TADs) to distalize posterior teeth on the left side, and gain space for incisor retraction and midline correction in upper dental arch. Results. Using TADs as additional anchorage in anterior region and coil spring for molar distalization, the space was made for tooth 23, midline correction and incisor retraction. After 40 months, a satisfactory result was achieved, overjet and midline correction, class I canines occlusion and class II molar occlusion. Conclusion. Class II/1 malocclusion in adults can be successfully treated using TADs. The success depends on the severity of malocclusion and patient cooperation.

Download Full-text

A continuing study of orofacial activity in normal occlusion and severe Class II malocclusion subjects

American Journal of Orthodontics ◽

10.1016/0002-9416(63)90198-2 ◽

1963 ◽

Vol 49 (11) ◽

pp. 868-869

Keyword(s):

Class Ii ◽

Class Ii Malocclusion ◽

Normal Occlusion

Download Full-text

Dentoskeletal Class II Malocclusion: Maxillary Molar Distalization with No-Compliance Fixed Orthodontic Equipment

Dentistry Journal ◽

10.3390/dj8010026 ◽

2020 ◽

Vol 8 (1) ◽

pp. 26

Author(s):

Vincenzo Quinzi ◽

Enrico Marchetti ◽

Luigi Guerriero ◽

Floriana Bosco ◽

Giuseppe Marzo ◽

...

Keyword(s):

Orthodontic Treatment ◽

Final Analysis ◽

Class Ii ◽

Dental Arch ◽

Class Ii Malocclusion ◽

Exclusion Criteria ◽

Molar Distalization ◽

Maxillary Molars ◽

Maxillary Molar ◽

Orthodontic Devices

Dentoskeletal class II malocclusion due to a protruded upper dental arch is a major reason for an orthodontic treatment. In these cases, the correction of class II can be hindered by molar distalization, obtained with ‘no-compliance therapy’ that involves the use of appliances which minimize the need for such co-operation and attempt to maximize the predictability of results. The aim of this review was to outline the effectiveness of no-compliance fixed orthodontic devices in the molar distalization. After selection according to the inclusion/exclusion criteria, 16 articles from 2000 to 2019 were qualified for the final analysis. The literature shows various no-compliance fixed devices whose effect is to distalize the maxillary molars. The present revision allows to conclude that there is a need to increase the number of studies, especially with regard to the most recently introduced devices in the literature. The analysed studies allow to hypothesize that these appliances act with a minimal variability of molar distalization and disto-inclination among them, although different effects among the appliances can be observed as regards to the anchorage.

Download Full-text

Analysis of Interarch Tooth Size Relationship in Nepalese Subjects with Normal Occlusion and Malocclusions

International Journal of Dentistry ◽

10.1155/2019/2761427 ◽

2019 ◽

Vol 2019 ◽

pp. 1-6

Author(s):

Rajeev Kumar Mishra ◽

Dashrath Kafle ◽

Rahul Gupta

Keyword(s):

Study Groups ◽

Class Ii ◽

Class I ◽

Tooth Size ◽

Class Ii Malocclusion ◽

Normal Occlusion ◽

Size Discrepancy ◽

Clinically Significant ◽

Anterior Ratio ◽

Overall Ratio

Introduction. A proportional relationship between the maxillary and mandibular teeth size is required for achieving good finish with proper overjet and overbite postorthodontic treatment. The aims and objectives of this study were to determine the anterior and overall Bolton’s ratio in Nepalese population, to compare Bolton’s ratio between subjects with normal occlusion, Class I malocclusion, and Class II malocclusion, to compare these results with Bolton’s norm, and to determine the frequency of clinically significant (beyond 2 SD) tooth size discrepancy compared to Bolton’s norm. Materials and Methods. The study models of the subjects with normal occlusion and Angle’s Class I malocclusion and Class II malocclusion and fulfilling the inclusion criteria were retrieved from department archives. An electronic digital caliper was used to measure mesiodistal tooth size of the maxillary and mandibular teeth anterior to the second molars. The study sample of 120 study models consisted of the normal occlusion group (n = 31), Class I malocclusion group (n = 47), and Class II malocclusion group (n = 42). These measurements were then used to obtain Bolton’s ratio in three groups of subjects. Bolton’s ratio of study groups was compared with each other and with Bolton’s original ratio. Results. The differences in tooth size ratio of the study groups were not significant statistically, when the groups were compared on the basis of malocclusion or gender. Statistically significant differences were exclusively observed between the study groups and Bolton’s original sample for the anterior ratio. The frequency of the clinically significant tooth size ratio discrepancy was lower for the overall ratio (9.1%) compared to the anterior ratio (22.5%). Conclusions. Bolton’s analysis on the Nepalese population sample shows that there was no significant difference observed on the anterior and overall tooth size ratios when these were compared based on Angle’s malocclusion classes or gender. The clinically significant anterior tooth size discrepancy was more prevalent than that of the overall ratio.

Download Full-text