Martín Casado, Ana María

Universidad de Salamanca · Área de Estadística e Investigación Operativa

Background and Objectives: Primary outcome: To assess the level of agreement between the objective and subjective methods for recording gingival colour in each area of the gingiva. Secondary outcome: To compare performance of the subjective visual method of gingival colour selection by a male observer and a female observer. Materials and Methods: A...

To examine the differences between natural gingival colour in men and women. To determine the degree of predictability of changes in the gingival colour coordinates recorded for healthy gingiva, according to age, long-term medication, frequency of toothbrushing, and smoking habits. The CIELAB colour coordinates were recorded using a spectrophotomet...

No gingival shade guide exists that can be used as a ‘gold standard’ in gingival shade selection. This research, therefore, aimed to determine whether comparable results in subjective gingival shade selection can be achieved using basic gingival colours produced by distinct manufacturers. It also aimed to explore how coverage of the colour space is...

Objective: 1) To put forward a set of valid pink ceramic samples for subjective gingival colour selection in the Caucasian population, and 2) to assess the quality of the shade matches provided by the selected pink samples. Methods: The ceramic gingival shade samples (n=133) were obtained by mixing pairs of basic colours from a single system. In...

Background The increasing demand for childbirth care based on physiological principles has led official bodies to encourage health centers to provide evidence-based care aimed at promoting women’s participation in informed decision-making and avoiding excessive medical intervention during childbirth. One of the goals is to reduce pain and find alte...

Purpose: To study the degree of accuracy in gingival colour matching of undergraduate students using a computer application. Material and methods: Seventy-six undergraduate dental students were evaluated in gingival shade selection using an in-house developed computer application. Fifteen intraoral gingival photographs and 21 pink gingival colou...

To quantify the discolouration of the temporary acetal resins in vivo, based on the weeks of follow-up and the salivary pH in the three thirds of the tooth. To find out if the final CIELAB coordinates can be predicted from the initial colour coordinates, the salivary pH, the situation (in thirds) and the weeks of follow-up. Colour coordinates (L, C...

A strong innovative tendency is nowadays emerging that largely comprises new hydrological modelling approaches, based on Causal Reasoning through Probabilistic Graphical Modelling (PGM), because its ability to support probabilistic reasoning from data with uncertainty. These novel modelling frameworks are quite diverse and disperse not only in term...

Objective : To study the sociodemographic and work-related factors that affect the level of burnout syndrome in Spanish dentists through an observational epidemiological study. Method : An online survey answered by 1298 Spanish dentists was used to record their gender, age, work environment, number of practices in which they work, whether they wor...

The aim of this work is to study the personality factors and coping styles of Spanish dentists when facing burnout syndrome, through epidemiological work. An epidemiological study of 1928 Spanish dentists was undertaken through an online survey, which registered the age and gender, and three questionnaires: NEO-FFI (personality traits), Brief COPE...

In this paper, we extend the use of disjoint orthogonal components to three-way table analysis with the parallel factor analysis model. Traditional methods, such as scaling, orthogonality constraints, non-negativity constraints, and sparse techniques, do not guarantee that interpretable loading matrices are obtained in this model. We propose a nove...

Purpose: To measure the validity and reliability of two gingival shade guides to represent in vivo gingival color using a Caucasian population sample. Materials and methods: CIELab color space was used to study three gingival reference areas (the free gingival margin, the keratinized gingival body, and the upper part of the keratinized gingiva)...

One of the main drawbacks of the traditional methods for computing components in the three-way Tucker model is the complex structure of the final loading matrices preventing an easy interpretation of the obtained results. In this paper, we propose a heuristic algorithm for computing disjoint orthogonal components facilitating the analysis of three-...

OBJECTIVE To establish the thresholds of chromatic perception and clinical acceptability of gingival colour according to professional category and in accordance with the perceptibility/acceptability threshold of 50:50 (colour differences that can be perceived/accepted by 50 % of the observers). METHODS A total of 21 different coloured samples made...

Statement of problem How pink gingival porcelain color is perceived by participants classified according to profession and sex is unclear. Purpose The purpose of this in vitro study was to evaluate the degree of correlation between the ordering of color tabs by participants classified according to profession, years of dental work experience, and s...

The concept of sustainability is assumed for this research from a temporal perspective. Rivers represent natural systems with an inherent internal memory on their runoff and, by extension, to their hydrological behavior, that should be identified, characterized and quantified. This memory is formally called temporal dependence and allows quantifyin...

Currently, noticeable changes in traditional hydrological patterns are being observed on the short and medium-term. These modifications are adding a growing variability on water resources behaviour, especially evident in its availability. Consequently, for a better understanding/knowledge of temporal alterations, it is crucial to develop new analyt...

Purpose: The purpose of this study was to propose and assess a shade guide for pink gingival aesthetics using a Spanish population sample. Materials and methods: The L*, C*, h, a* and b* coordinates of 259 participants were measured using a spectrophotometer in 3 standardized points along the attached gingiva of the maxillary central incisors. A...

Nowadays, a noteworthy temporal alteration of traditional hydrological patterns is being observed, producing a higher variability and more unpredictable extreme events worldwide. This is largely due to global warming, which is generating a growing uncertainty over water system behavior, especially river runoff. Understanding these modifications is...

The aims of the study were: to describe the gingival color surrounding the upper incisors in three sites in the keratinized gingiva, analyzing the effect of possible factors which modulate (socio-demographic and behavioral) intersubject variability; to study whether the gingiva color is the same in all three locations and to describe intrasubject c...

The objectives of this study were to determine the relationship between the results provided by the classical CIELab (ΔEab *) and the CIEDE2000 (ΔE00) formulas and the gingival color space using the Bland and Altman limits of agreement, to use this relationship to establish the equivalences between the gingival color thresholds of perceptibility of...

Purpose: To evaluate the CIELAB and CIEDE2000 formulas to determine which better reflects the difference in color perception, and whether there are gender differences in color perception. Materials and methods: Fifty-six participants grouped 21 different-colored disks made of pink porcelain (color range: from 36.8 to 63.9 for L* , from 16.4 to 3...

Statement of problem: Several formulas to measure color differences have been proposed to improve the correlation between color measurements and visual perception. Despite the progress obtained, equating between formulas is complex, rendering the exchange of information in scientific papers difficult. Purpose: The purpose of this study was to de...

Statement of problem: Many color specification systems and color differences have been proposed to improve the correlation between color measurement and visual perception. Although color differences can be quantified using either the CIELab formula (ΔE*ab) or the recently introduced CIEDE2000 formula (ΔE00), which captures the perceived color diff...

In this paper we review the Multidimensional Unfolding model since its beginning due to Coombs (1950) like a special case of Multidimensional Scaling, until present, with some of the main works we can find in the literature regarding to the problem of degenerate and trivial solutions, available software and algorithms for optimal solutions calculat...

El objetivo de esta investigacion fue evaluar la calidad de vida en pacientes clasificados como osteoporoticos en el Ambito de la Atencion primaria. Se llevo a cabo un diseno observacional transversal, los pacientes fueron reclutados de forma consecutiva en un Centro de Salud de Atencion primaria de Salamanca (Espana). Se utilizo un cuestionario so...

Abstract: Osteoarthritis is a common rheumatic disease, associated with an important deterioration in health-related quality of life (HRQL). However, arthritis impact is not the same in men and women. This study examined depression and severe pain as mediators between gender and HRQL in patients with arthritis. Two questionnaires, EuroQol-5D and th...

En este trabajo se pretende poner de manifiesto la importancia que tiene la elección de la técnica estadística más adecuada en el estudio de comunidades ecológicas. Se hace un análisis comparativo de las técnicas tradicionalmente utilizadas, para este tipo de estudios, así como las de más reciente aparición, confrontando los resultados obtenidos en...

Los estudios de comunidades ecológicas implican, con frecuencia, el inferir las relaciones existentes entre las especies y las variables ambientales a partir de los datos de composición de la comunidad y de medidas asociadas al habitat. Es un hecho que la composiciün de la comunidad cambia a lo largo de gradientes ambientales y que las especies tie...