This paper researches on potential relations of dependency space, closure system and rough set theory, and mainly focuses on solving some essential problems of rough set theory based on dependency space and closure system respectively. Firstly, we pretreat an information system into a relatively simple derivative system, in which dependency space and closure system are generated; Secondly, by m...

UNLABELLED Anterior spaces may interfere with smile attractiveness and compromise dentofacial harmony. They are among the most frequent reasons why patients seek orthodontic treatment. However, midline diastema is commonly cited as a malocclusion with high relapse incidence by orthodontists. OBJECTIVES This study aimed to evaluate the stability of maxillary interincisor diastemas closure and ...

AIM The aim of this study was to assess the dynamic activity of the mandible by means of a computerised kinesiograph in Class II patients treated with orthodontic therapy and to compare the results of this group with those of a sample of untreated Class II patients. METHODS Twenty young adolescents who had undergone orthodontic treatment for correction of Class II malocclusion and twenty age ...

This case report describes the combined surgical, orthodontic and prosthodontic rehabilitation of an adult female patient with a previous history of follicular ameloblastoma, which was treated through partial mandibulectomy and an immediate replacement of missing bone with an autologous calvarial bone graft. Orthodontic treatment was undertaken in order to restore occlusal disturbances and obta...

This study offers help for drawing up a community health orthodontic assistance protocol, especially for the public health system. A preventive and interceptive orthodontic program is suggested through the inclusion of approaches in existing healthcare programs that may help prevent malocclusions, extending the services offered by Basic Healthcare Units to include fitting space retainer applian...

The presence of a dental contact point is essential to maintain normal occlusion and to preserve the health of periodontal structures. Occasionally dental caries could compromise the interproximal contact point, leading to migration of the adjacent teeth with consequent retention of food, gingival inflammation, pocket formation, bone loss and dental mobility. In order to achieve an adequate res...

Interproximal reduction (IPR) is a treatment option for orthodontic space gain. The attainment of prescribed objectives in aligner may require IPR that accurately performed both qualitatively and quantitatively.

BACKGROUND AND AIM Orthodontic tooth movement (OTM) is a process whereby the application of a force induces bone resorption on the pressure side and bone apposition on the tension side of the lamina dura. However, only limited data are available on the in vivo behavior of the periodontal tissues. The aim of this study was to assess the changes of periodontal tissues, induced by the orthodontic ...