Precision and practical usefulness of intraoral scanners in implant dentistry : a systematic literature review

This systematic review aimed to evaluate the efficiency and accuracy of digital impression techniques for implant-supported restorations, and to assess their economic feasibility. Two independent electronic database searches were conducted in the Pubmed/MedLine, Cochrane Library, and Lilacs databases complimented by a manual search, selecting relevant clinical and in vitro studies published between 1st January 2009 and 28st February 2019. All type of studies (in vivo and in vitro) were included in this systematic review. Twenty-seven studies (8 in vivo and 19 in vitro studies) fulfilled the inclusion criteria. No meta-analysis was performed due to a large heterogeneity of the study protocols. The passive fit of superstructures on dental implants presented similar results between digital and conventional impression techniques. The studies considered that several factors influence the accuracy of implant impression taking: distance and angulation between implants, depth of placement, type of scanner, scanning strategy, characteristics of scanbody, and operator experience. Regarding the economic viability of intraoral scanning systems, only one study reported any benefit in comparison with conventional techniques. Digital impressions of dental implants can be considered a viable alternative in cases of one or two contiguous dental implants. However, more studies are needed to evaluate the accuracy of digital techniques in full-arch implant-supported restorations

The thrill of a smart purchase: Does country matter?

This is the accepted version of the following article: Quinones, M, Gómez-Suárez, M, Yagüe, M J(2021), The thrill of a smart purchase: Does country matter?. Int J Consum Stud. 2022; 46: 295–308, which has been published in final form at http://dx.doi.org/10.1111/ijcs.1267. This article may be used for non-commercial purposes in accordance with the Wiley Self-Archiving Policy authorservices.wiley.com/author-resources/Journal-Authors/licensing/self-archiving.htmlThe purpose of this article is to investigate the relationship of Schwartz's theory of basic individual values to smart shoppers' predisposition to purchase store brands, considering the mediating role of the smart shopper self-concept and the moderating role of the country of origin. After an initial qualitative analysis, survey data were collected from a sample of 868 shoppers in four western countries (Spain, France, Germany and the United States). Then, a series of statistical estimations was developed through structural equation modelling. The results of these sequential models showed metric equivalence, providing a basis for generating valid comparisons among the four countries. The final findings corroborate the idea that the individual's value structure has a direct and positive effect on the smart shopper self-concept and that this effect in turn influences the shopper's attitude towards store brands. The results also show that although the dimensions of the buyers' value structures are cross-country invariant, the set of values that best define smart shoppers differs significantly by country. Mixed results are found when the relationship between the smart shopper self-concept and the attitude towards store brands is analysed for each individual country. These outcomes offer international retail managers guidance on how to best stimulate smart shoppers' positive responses towards store brands.This research benefited from the Professorship Excellence Program in accordance with the multi-year agreement signed by the Government of Madrid and the Universidad Autónoma de Madrid-UAM (Line #3

Store brand evaluative process in an international context

This author accepted manuscript is deposited under a Creative Commons Attribution Non-commercial 4.0 International (CC BY-NC) licence. This means that anyone may distribute, adapt, and build upon the work for non-commercial purposes, subject to full attribution. If you wish to use this manuscript for commercial purposes, please contact [email protected] study was supported by the Spanish Ministry of Education (ECO2012-31517) and by the Spanish Ministry of Economy and Competitiveness (ECO2015-69103-R)

How individual value structures shape smart shopping experience and brand choices: an international perspective

This study explores the extent to which smart shopping, and particularly its effect on consumer attitudes towards store brands and national brands, is influenced by consumers' cultural values. Our conceptual model, based on Schwartz's value framework, was tested with a survey that sampled 1272 shoppers from six different countries (USA, UK, France, Germany, Italy and Spain). According to the results, the values that individuals acquire in their cultural environment significantly influenced their smart-shopper self-concept. Additionally, there were cross-country differences in consumers' value frameworks. As expected, smart shoppers' self-concept influenced their attitude towards both store brands and national brands, but was less influential in the former's case. These results have important implications for international marketing scholars and practitioners, especially regarding strategic aspects such as segmentation, positioning, and major communication strategies

Comparative analysis of trueness between conventional and digital impression in dental-supported fixed dental prosthesis with vertical preparation

Biologically oriented preparation technique (BOPT) is a vertical preparation technique without a finish line to create a new anatomic crown with a prosthetic emergence profile. This case report describe the protocol realized digitally in a patient who required a new fixed partial denture (FPD) in the anterior esthetic zone. After time of temporary restoration, definitive conventional (CI) (double-cord retraction and vinyl polysiloxane material), and digital impression (DI) with three different intraoral scanner (IOS) (Trios®, True Definition® and iTero®) were taken. All digital impression were obtained through three different scans: temporary restoration in the mouth after healing period, prepared teeth, and temporary restoration out of the mouth. To establish which of the IOS was the most accurate, it was necessary to compare the STL files obtained from each of the IOS with the STL file of the conventional impression, which was digitized with a laboratory scanner (3Shape D800). All these STL were imported to a software (ExoCAD 2.4 Plovdiv®), and they were superimposed. To establish the difference in trueness with SC, 6 points were chosen, 3 points in teeth, and another 3 points in soft tissue. The mean measurement in terms of trueness in teeth were: STS (0,039 mm), SI (0,054 mm), STD (0,067 mm); and in soft tissue were: STS (0,051 mm), SI (0,09 mm), STD [0,236 mm]. The IOSs showed differences between them in terms of trueness, being the Trios the most accuracy IOS. Final restoration was fabricated and cemented. The patient was examined at 3, 6 and 12 months, without any type of biological or mechanical complications. Digital impression with an IOS seems to be a viable alternative to perform zirconia FPD in the BOPT tecbique

Learning strategies in excellent and average university students. Their evolution over the first year of the career

The aim of this paper was to analyze the evolution of learning strategies of two groups of students, excellent and average, from 11 degrees of the UPV (Valencia/Spain) in their freshman year. We used the CEVEAPEU questionnaire. The results confirmed the availability of better strategies of excellent students and also the existence of evolutionary patterns in which affective-emotional strategies decrease, such as value of the task or internal attributions, and that others increase, such as extrinsic motivation and external attributions. It seems that the student does not meet your expectations in the new context and professors have important responsibilities

¿Cuánta desigualdad en exposición a alta polución por PM10 es demasiada para considerarla ambientalmente injusta? Una evaluación para grupos vulnerables en dos grandes ciudades españolas

Inequality in the environmental conditions or burden (negative externalities, hazards, discomfort, etc.) between places and people is an issue of growing interest. Many of works, using a variety of approaches, conclude that there is often discrimination and injustice. However, from the public decision-making and governance perspective, one question needs a clear answer: how much inequality is there? Is this too much, and therefore unfair, and does it justify public action? This paper looks at this question in a case study on the threat posed by air pollution in Madrid and Barcelona (Spain), by examining the spatial distribution of several vulnerable population groups and their potential exposure to high concentrations of PM10 in the atmosphere, and using an affordable method involving GIS and statistical techniques. Adopting an explicitly impartial operating criterion makes it possible to measure the amount of inequality for each population group and determine more objectively if it significantly exceeds the baseline criterion. This would make it more accurate for citizens and decision-makers alike to better assess the possible inequitiesLas desigualdades en la afección o carga ambiental (externalidades negativas, peligros, malestar, etc.) entre lugares y personas son un tema de creciente interés. Se han publicado abundantes estudios, utilizando métodos diversos, en los que se concluye que, a menudo, existe discriminación e inequidad. Ahora bien, desde el punto el punto de vista de la formación de decisiones públicas y de la gobernanza una pregunta sigue siendo necesario responder con claridad: cuánta desigualdad existe y si ésta es demasiada para ser calificada de injusta y justificar, por tanto, la acción pública. En este artículo se aborda esa cuestión a partir de un estudio de caso relativo al peligro por polución del aire en Madrid y Barcelona (España). A tal fin se examina la distribución espacial de varios grupos de población vulnerables y su exposición potencial a alta concentración de PM10 en la atmósfera, usando un método razonable que implica el uso de SIG y técnicas estadísticas. La adopción de un criterio operativo y explícito de imparcialidad posibilita medir la cantidad de desigualdad para cada grupo de población y determinar si ésta excede significativamente al criterio de referencia. Ello facilita una valoración más certera de la situación por los ciudadanos y los decisores públicosThis research was supported by the Spanish Ministry of Economy, Industry and Competitiveness project grant CSO2014-55535-

Estrategias de aprendizaje en estudiantes universitarios excelentes y medios. Su evolución a lo largo del primer año de carrera

El objetivo de este trabajo era analizar la evolución de las estrategias de aprendizaje de estudiantes excelentes y medios de 11 titulaciones de la UPV (Valencia), en su primer año. Los alumnos contestaron el cuestionario CEVEAPEU en tres momentos. Los resultados constataron mejores estrategias en los estudiantes excelentes. También confirmaron patrones evolutivos en que estrategias afectivo-emotivas relevantes disminuyen, como valor de la tarea o atribuciones internas, y se incrementan otras, como motivación extrínseca y atribuciones externas. Parece que el estudiante no satisface sus expectativas en el proceso de adaptación al nuevo contexto y ahí los profesores tienen responsabilidades ineludibles

University students' competences in ICT: A view from the education domain

Contemporary university students face the knowledge society, where mastering information and communication technologies (ICT) is an essential requirement to form part of this society. The objective of our study was to validate a basic ICT competences model made up of three ICT competence subsets (technological, pedagogical and ethical) influenced by various personal and contextual factors. For this purpose, a cross-sectional explanatory correlation design was used, with a sample of 646 university students from the University of Valencia (Spain), collecting the information through a questionnaire. A multiple indicators and multiple causes model was used to validate the students' ICT competences model. The results revealed that ICT competences form a single set made up of three subsets of competences: technological, pedagogical and ethical. An asymmetrical explanatory relation was found between the technological and pedagogical competences on the one hand and between the ethical and pedagogical competences on the other hand. The factors gender, area in which the degree is taught and the frequency of using a computer with the Internet impacted on the three subsets of competences. The model shows the complexity of university students' ICT competences, with training in ICT competences being an important element to consider