Search results for "CEDU"
showing 10 items of 2453 documents
Osseointegration of miniscrews: a histomorphometric evaluation.
2007
SUMMARY Mini-implants and miniscrews are commonly used in orthodontics to provide additional temporary intraoral anchorage. Partial osseointegration represents a distinct advantage in orthodontic applications, allowing effective anchorage to be combined with easy insertion and removal. This article reports the histomorphometric fi ndings of the osseointegration of bracket screw bone anchors (BSBAs). In an experimental animal study, four BSBAs were inserted in the alveolar process of the lower jaw in each of fi ve male beagle dogs, aged 6.5 months from the same mother. Eleven screws were lost during the study, nine of them due to lack of primary stability. One screw was removed at the end of…
Comparative analysis of numerical and experimental data of orthodontic mini-implants
2011
The purpose of this study was to compare numerical simulation data derived from finite element analysis (FEA) to experimental data on mini-implant loading. Nine finite element (FE) models of mini-implants and surrounding bone were derived from corresponding experimental specimens. The animal bone in the experiment consisted of bovine rib. The experimental groups were based on implant type, length, diameter, and angle of insertion. One experimental specimen was randomly selected from each group and was digitized in a microCT scanner. The FE models consisted of bone pieces containing Aarhus mini-implants with dimensions 1.5 × 7 mm and 1.5 × 9 mm or LOMAS mini-implants (dimensions 1.5 × 7 mm, …
Primary loading of palatal implants for orthodontic anchorage--a pilot animal study.
2006
Summary Objectives This study aimed at evaluating the clinical performance and osseointegration of short orthodontic implants immediately loaded with orthodontic forces. Material and methods The investigation was designed as an experimental animal study. Eight palatal implants of the Ortho-system® were immediately loaded with 100 cN after palatal insertion in 4 female german shepherd dogs. Xylene orange and calcein green were used for polychrome sequential labelling. Histological preparation utilized the cutting and grinding technique. Outcome variables were clinical implant success, histological osseointegration and bone-to-implant contact rates. Results All (8/8) implants were clinically …
De como la incorporación de las ADR convierte el Derecho Procesal en Derecho de los medios de tutela del ciudadano (How the Incorporation of ADR in P…
2012
Spanish Abstract: La nueva realidad que la sociedad global nos presenta destaca un dato indudable: los procesos judiciales y los tribunales del Estado se muestran en la actualidad desbordados, sobredimensionados en todos los sectores del ordenamiento juridico (personal, material, presupuestario) y han experimentado, paralelamente a la sofisticacion de la litigiosidad, una imposibilidad de asumir con todas las garantias el derecho a la tutela judicial efectiva. Esa profusion de la conflictividad en calidad y cantidad es el dato innegable desde el que hay que afrontar un nuevo escenario de la solucion de conflictos y de la resolucion de la litigiosidad que, allende los tribunales de justicia …
El legislador ausente del artículo 18.3 de la Constitución (la construcción pretoriana del derecho al secreto de las comunicaciones).
2017
Resumen:Este trabajo aborda los problemas jurídicos generados por persistente ausencia de una ley de desarrollo del derecho fundamental al secreto de las comunicaciones acorde con las exigencias constitucionales. Centrándonosen el estudio de cómo, mediante la presencia del juez y la ausencia del legislador, se ha producido una construcción pretoriana de este derecho, tanto en su dimensión procesal, como en la sustantiva. Y, finalmente, abordamos en qué medida, siguiendo la doctrina constitucional, la recientemente reforma de la Ley de Enjuiciamiento Criminal ha venido a colmar el vacío normativo; quedando pendiente la exigencia de regular, con la garantías que ofrece la ley, el contenidomat…
El sesgo de la máquina en la toma de decisiones en el proceso penal
2020
espanolLa inteligencia artificial tiene innumerables ventajas en nuestras vidas. La capacidad de almacenar y conectar datos que tiene un ordenador es muy superior a la capacidad humana. Pero esta “inteligencia” comporta tambien problemas de hondo calado etico que el derecho debera responder. Digo “inteligencia” porque a dia de hoy las maquinas no son inteligentes. Las maquinas solo utilizan aquellos datos que, previamente, un humano le ha ofrecido como ciertos. La verdad es relativa y los datos van a tener los mis-mos sesgos y prejuicios que tiene el humano que programa la maquina. En otras palabras, las maquinas van a ser racistas, sexistas y clasistas si lo son sus programadores. A todo e…
Ontological supports of knowledge: knowledge creation and analytical knowledge
2011
PurposeThe purpose of this paper is to examine, from the perspective of different theoretical approaches, the relationship that exists between different ontological supports of knowledge and knowledge itself (the way it is created and its characteristics).Design/methodology/approachThe paper proposes two different types of knowledge (knowledge of concrete situations and abstract knowledge) and two approaches (the constructivist view and the cognitive view) and provides a general classification of the different knowledge types. Second, it examines the underlying ontological support‐knowledge creation, characteristics or types of knowledge relationship in different approaches. Finally, conclu…
Simultaneous determination of oxybenzone and 2-ethylhexyl 4-methoxycinnamate in sunscreen formulations by flow injection-isodifferential derivative u…
2001
Abstract A flow injection procedure was developed for the simultaneous determination of two UV filters (oxybenzone and 2-ethylhexyl 4-methoxycinnamate) in sunscreen formulations, based on the isodifferential approach. The use of the second derivative spectra allowed a selective determination of the analytes free from matrix interferences and without pretreatment of samples. Standard solutions of the analytes were analyzed by the proposed procedure in order to select the appropriate wavelengths to solve the mixture. After this, the procedure was validated using commercial sunscreen formulations the concentrations of which were determined by an HPLC procedure. The two procedures gave comparab…
Multi-element trace determinations in pure alkaline earth fluoride powders by high-resolution ICP-MS using wet-chemical sample preparation and laser …
2003
Four alternative analytical procedures for the determination of ten important trace impurities (Mg, Cr, Fe, Cu, Zn, Sr, Zr, Cd, Ba, and Pb) in pure alkaline earth fluoride powders were applied using high-resolution inductively coupled plasma mass spectrometry (ICP-MS). Two procedures are based on a wet-chemical microwave digestion with boric acid and quantification by the standard addition technique and isotope dilution mass spectrometry (IDMS), respectively. In addition, analyses are also performed by laser ablation as a direct solid sampling technique applying matrix-matched external calibration as well as isotope dilution of the powdered sample. For most elements good agreement between t…
The comparison of reliabilities in dental imaging methods.
2003
Objectives: Common practice in the statistical comparison of imaging instruments with limited reproducibility consists in the separate estimation of the instrument's reliabilities. However, as soon as one of the imaging methods is subject to item-specific bias (which has to be expected in many dentomaxillofacial imaging procedures), this approach will end in severe errors in reliability computation and in corresponding erroneous clinical conclusions. This paper seeks to point out these effects and to illustrate a more appropriate model for the comparison of instrumental reliabilities. Methods: A standard reliability model was adjusted for item-specific bias and illustrated by the comparison…