Study of occlusal-articulation relationships with the help of T-SCAN apparatus.

UNLABELLED: Normal occlusal-articulation relationship between the two jaws ensure the even distribution of the occlusal forces during mastication. Data from the literature and the absence of serious studies evaluating the T-Scan apparatus give reasons for the present study. AIM: To evaluate T-SCAN apparatus for registration and analysis of occlusal contacts in dynamic articulation. MATERIALS AND METHODS: The study was carried out with the medical diagnostic apparatus T-SCAN. Out of 180 students (19-24 years old) examined, we selected 15 with intact dentitions without or with some small obturations and Angle class I relationship between the two jaws. Using T-SCAN we made 7 to 10 records in each of the studied students. RESULTS: The occlusal contacts are presented as two-dimensional and three-dimensional images of the contour with different size and colour depending on the force of the pressure. A model of the dental arch is superimposed over the registered occlusal contacts. The place of the centre of the force in central occlusion is determined. The trajectory of the centre of the force during movements of the mandible is recorded which allows determination of the direction and amplitude of movement of the mandible. CONCLUSION: The results from the study reveal that the correct use and analysis of the data from the apparatus T-SCAN provide valuable and reliable information for the localization and distribution of occlusal contacts in dynamic articulation.

Broad indications for the application of simultaneous oral-nasal manometering method.

UNLABELLED: The purpose of the study is to enlarge and define the perimeter of application of manometrical method for investigation of nasal breathing. METHOD: We studied patients with congenital or acquired pathological communications of the maxilla as well as patients with perforation of the sinus after teeth extractions that have been treated by prostheses. An original electronic pneumatic device was constructed for our method. RESULTS: Because of the objectiveness of the method and the device we obtained good results in closing the pathological communications in all of the patients. When used in the diagnosis of sinus perforations the method and the device showed the same effectiveness, CONCLUSION: When realization is possible the method guarantees absolute effectiveness in defining leakage of breathed air through pathological communications of the maxilla. With this device, constructed for the study we optimized the application of the method.