1,720,965 research outputs found
Gli elastici nella pratica ortodontica: proprietà chimico-fisiche, indicazioni cliniche.
No full textPatient and clinical evaluation of traditional metal and polyamide removable partial dentures in an elderly cohort
No full textPurpose: To evaluate several clinical and functional parameters by administration of specific questionnaires to an elderly patient's cohort wearing three different types of removable partial denture (RPD): VALPLAST-RPD (Polyamide VALPLAST), CoCr-RPD (cobalt-chromium alloy), and PMMA-RPD (heat polymerized polymethyl methacrylate). Materials and Methods: One hundred twenty patients (mean age 73 years) were included in this study. All patients were treated with a removable partial denture for the maxillary arch. After 1 year of use, patients and clinicians were asked to compile specific questionnaire on patient satisfaction, including aesthetic, functional, and clinical outcomes. It was also evaluated whether the localization of the missing teeth according to Kennedy classification may affect these parameters. Categorical data obtained from the questionnaires were analyzed by chi-squared test. Results: VALPLAST-RPD was the most satisfactory aesthetically. Nevertheless, patients of VALPLAST-RPD group reported increased difficulty in cleaning the prosthesis, roughness perceived by the tongue, and increased retention loss (p < 0.001). Patients with PMMA-RPD claimed a higher level of encumbrance (p < 0.001) and increased speech difficulties (p = 0.002). Clinically, patients of VALPLAST-RPD and PMMA-RPD groups displayed redness of the mucosa area around abutment teeth (p < 0.001). Patients of VALPLAST-RPD group had four cases of artificial teeth loss and two cases of discoloration. The position of missing teeth did not significantly influence any parameter. Conclusions: Each RPD material utilized may present advantages and disadvantages in an elderly population. VALPLAST-RPD may be recommended to older patients with non-extensive edentulous areas supported by anterior and posterior teeth, and not subjected to strong chewing loads. The main advantages are aesthetic satisfaction and easiness to insert and remove it
Gli elastici nella pratica ortodontica: proprietà chimico-fisiche e indicazioni cliniche
No full textTwo and three-dimensional computed tomography in the diagnosis of impacted teeth.
No full textAbstract
The paper describes the advantages of two and three-dimensional computed tomography in the diagnosis of impacted teeth. Differential colouring of anatomical structures distinguishes between elements of identical or similar density
Dentinogenesis imperfecta: a study using scanning electron microscopy and microanalysis.
No full text3D CT in the demonstration of ossified stylohyoid complex: a pictorial essay.
No full textAbstract
Ossification of the stylohyoid complex may be discovered during radiological examination of the cervical spine or at dental panoramic examination. Sometimes it is correlated with atypical facial pain. We report a case in which computed tomography demonstrated the ossified styloid chain with articulations using 3D bony surface reconstruction.
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Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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