Morphofunctional Features in Angle Second Class Malocclusion on Dental Gypsum Models

Cristian Romanec,Sorana Rosu,Nicolae Daniel Olteanu,Bogdan Dragomir,Monica Mihaela Scutariu,Georgiana Macovei

doi:10.37358/mp.18.4.5101

Abstract

The large diversity of clinical forms in Angle second class malocclusion explains the interest of researchers and clinicians in identifying changes in the dental arch in subdivisions II/1 and II/2. The purpose of the study is to identify the characteristics of the dental alveolar arch in order to determine the differences between class II/l and II/2 malocclusions. The study was conducted on dental gypsum models of 62 orthodontic untreated patients diagnosed with class II/1 Angle malocclusion, respectively class II/2. The results obtained by us reveals a statistically significant differentiation in the dental arcade, a narrowed maxillary arch at the molar level and elongated at premolar and molar level, in subdivision II/l. Our data are consistent with the results of literature. The knowledge of dental arch features serves to develop a correct and complete diagnosis and also to reach the therapeutic goals and to evaluate post-treatment response in short, medium and long term.

Highlights

The large diversity of clinical forms in Angle second class malocclusion explains the interest of researchers and clinicians in identifying changes in the dental arch in subdivisions II/1 and II/2
The study was conducted on gypsum dento-alveolar models of 62 orthodontic untreated patients diagnosed with class II/1 Angle malocclusion, respectively class II/2 Angle, 40 girls (64.5%) and 22 boys (35.5%)
The maxillary arcade is narrowed at the premolar level more in II/l than in II/2, but insignificantly statistically

Summary

Experimental part Materials and methods

The study was conducted on gypsum dento-alveolar models of 62 orthodontic untreated patients diagnosed with class II/1 Angle malocclusion, respectively class II/2 Angle, 40 girls (64.5%) and 22 boys (35.5%). The dental-alveolar arcades were made by the same doctor, and the molding and processing of the dental model by the same dental technician. The measurements were made by two independent examiners, the differences being identified by a third examiner who determined the average error. The ideal values for the width and length parameters of the dental arch were calculated and the differences between measured and calculated values were made. In relation to the descriptive statistical analysis of the obtained results, we have previously verified the nature of the distribution of the values of the tested parameters. If the values of the tested parameters followed the normal law, we used the t test to analyze the differences between the two subdivisions, and when the measured parameter values did not follow the normal law, we used the nonparametric Mann-Whitney test

Characteristics dental alveolar arch

Results and discussions

Conclusions