Objective: The objective of this in vitro study is to compare measured values of pre-treatment tooth sizes and the Bolton overall and anterior analyses for fast-set plaster dental casts versus computer-based dental models made from a dual pour alginate impression. Materials and Methods: Maxillary and mandibular alginate impressions were made for a sample of thirty-six patients with permanent dentitions from first molar to first molar. Impressions were poured in fast-set orthodontic plaster within one hour and allowed to set for 8-10 minutes. Casts were removed from the impressions, cleaned of any observable plaster and re-examined for quality. Impressions were packaged and sent to OrthoCAD for generation of digital models. Measurements of mesiodistal tooth width were made using digital calipers or OrthoCAD proprietary software. Overall and anterior Bolton analyses were performed for all models. Measurements were repeated no less than two weeks later. Results were statistically analyzed for correlation coefficients and 2 x 2 MANOVA. Results: Correlations showed very high intrarater reliability for measurements made on both plaster and digital casts. Statistical significance was found for differences between plaster and digital casts in mesiodistal measurements of maxillary and mandibular anterior segments and total arch circumference, Bolton overall ratio and Bolton anterior ratio. Values of mean difference between plaster and digital casts for the anterior segment were 0.33 mm in the maxillary arch and 0.70 mm in the mandibular arch. Mean differences over the total arch were 0.68 mm in the maxillary arch and 1.35 mm in the mandibular arch. Value of mean difference between plaster and digital casts was 0.89% for the anterior Bolton ratio and 0.80% for the overall Bolton ratio. Conclusions: The results of this study show statistical differences for tooth size measurements between plaster casts made from the initial pour of alginate impressions and digital casts generated from the second pour. Statistical differences were also demonstrated for both the anterior Bolton ratio and total arch Bolton ratio, indicating differences between measurements were not the result of a uniform distortion occurring between the first and second pour. The small absolute value of mean differences may or may not have clinical significance. Individual practitioners should decide whether the absolute value for these small differences have clinical significance to their practice.

Syfte: Studiens syfte var att undersöka bakomliggande orsaker till tandvårdsrädsla hos vuxna, samt att undersöka vilka konsekvenser som tandvårdsrädsla kan ge. Metod: En litteraturstudie utfördes med hjälp av databaserna MEDLINE, CINAHL och Dentistry & Oral Sciences Source. Artiklar publicerade mellan 2015–2021 och som kunde besvara syftet eftersöktes. Femton artiklar valdes ut för att presentera resultatet. Resultat: Tandvårdsrädsla kan bero på individens negativa erfarenhet av tandvården, upplevd smärta vid tidigare besök samt en omfattande kariesproblematik i barndomen. Rädslan kan resultera i undvikande av tandvården, bristande förtroende för tandläkaren och en försämrad oral hälsa. Gingivit och fler karierade tänder var vanligare bland tandvårdsrädda individer, i jämförelse med individer som inte var tandvårdsrädda. Slutsatser: Det finns ett samband mellan tandvårdsrädsla och upplevd bristande omhändertagande från tandvården, som kan leda till försämrad oral hälsa och försämrade orala hälsovanor. Vidare forskning krävs för att kunna öka förståelsen och stödet för tandvårdsrädda individer, samt för att kunna utarbeta preventiva metoder så att risken för framtida problem minskar. / Aim: The aim of the study was to examine the underlying causes of dental anxiety in adults, and to examine the consequences that dental anxiety may have. Method: A literature study was made using the databases MEDLINE, CINAHL and Dentistry & Oral Sciences Source. Articles published 2015-2021 and were able to answer the purpose were sought. Fifteen articles were selected to present the results. Results: Dental anxiety could be caused by the individual’s previous negative experiences of dental care services, extensive caries experience in childhood and experience of pain during previous visits. This anxiety could lead to avoidance of dental care services, lack of confidence in the dentists and poor oral health. Gingivitis and more carious teeth were more common among individuals with dental anxiety, compared to individuals without dental anxiety. Conclusions: There is a link between dental anxiety and experienced lack of care from dental care services, which can lead to deteriorated oral health and deteriorated oral health behaviour. Further research is required to better the understanding and support of patients with dental anxiety, and to be able to develop preventative measures so as to mitigate these potential risks.

digitalisering@umu

Thesis (M.S.)--University of Michigan, 2001. / Includes bibliographical references.

No description available.

Guía sobre Kopernio, herramienta que funciona a través de Web of Science y permite que los investigadores puedan descargar de forma legal los artículos a los que la universidad está suscrito. También recupera archivos en texto completo disponibles en Google Scholar, Pubmed y otras plataformas.

No description available.

Festival de Innovación Educativa de la UPC / El primer FIE de la UPC es un espacio de docentes para docentes, en donde se compartirán las estrategias innovadoras de aprendizaje que se han venido aplicando en los últimos meses de educación online. Es una oportunidad para intercambiar conocimiento, seguir aprendiendo y atrevernos a innovar como parte del proceso de enseñanza y aprendizaje.

El trabajo de investigación que se presenta a continuación constituye el análisis de la problemática planteada sobre la empresa Travico Perú S.A.C, la cual ha reportado un descenso en sus ventas de sus diferentes servicios que ofrece. Para este desarrollo de este trabajo se ha aplicado la metodología de la ciencia de datos, con la cual se logró identificar las variables que influyeron en las ventas de todos los servicios durante los años 2016 al 2018, el conjunto de datos se obtuvo a través de plataformas con las que la empresa trabaja y los reportes de control interno, con ello, se identificaron 12 variables con 6429 datos. Así mismo, se empleó la técnica de aprendizaje automático no supervisado, basado en particiones: K means, las cual permitió segmentar y agrupar las variables que fueron seleccionadas. Finalmente, para el análisis, se presentaron distintas gráficas con los resultados de las ventas de la empresa y se hicieron comparaciones con los resultados de los clústeres. / The research work presented below constitutes the analysis of the problem raised about the company Travico Perú S.A.C, which has reported a decrease in its sales of its different services offered. For this development of this work, the methodology of data science has been applied, with which it has been identified to identify the variables that influenced the sales of all services during the years 2016 to 2018, the data set was achieved through of platforms with which the company works and internal control reports, thereby identifying 12 variables with 6429 data. Furthermore, we use a technique machine learning without supervised, based on partitions: K means the qualified segment and group the variables that were selected. Finally, for the analysis, different graphs are shown with the results of the company's sales and comparisons were made with the results of the clusters. / Trabajo de investigación

Thesis (M.S.)--University of Michigan, 1996. / Includes bibliographical references.