Search results for "implante"
showing 10 items of 107 documents
Cemented and screw-retained implant-supported single-tooth restorations in the molar mandibular region: A retrospective comparison study after an obs…
2015
Objectives: The aim of this study was to evaluate the survival and compare the appearance of different mechanical and biological complications, in screw-retained and cemented-retained single-tooth implant-supported restorations localized in the molar mandibular region, over a period of 1 to 4 years. Material and Methods: A retrospective study was carried out with a total of eighty implant-supported restorations, which were placed in eighty patients for prosthetic rehabilitation of a mandibular molar. Forty patients were rehabilitated with a cemented-retained restoration and the other forty with a screw-retained restoration. The presence of the following complications was recorded for both t…
Análisis clínico y radiológico de los implantes dentales colocados en el sector posterior maxilar. Elevación de seno directa vs técnica convencional
2018
Objetivos: Evaluar los parámetros clínico- radiológicos y su influencia en el éxito final de los implantes colocados tras elevación de seno directa (ESD) y en hueso nativo. Determinar y comparar el éxito y la supervivencia de los implantes. Analizar las complicaciones. Material y métodos: Se realizó un estudio retrospectivo con un seguimiento mínimo de 5 años. Se evaluó a pacientes tratados con implantes dentales en el maxilar posterior en la unidad de Cirugía Bucal de la Universitat de València. Los pacientes que cumplieron los criterios de inclusión se citaron y dividieron en tres grupos en función de la técnica quirúrgica utilizada para su rehabilitación. Grupo control: implantes en hues…
A method for rapid implantation of multielectrode systems.
1991
The implantation of several chronic electrodes at the same time was needed for the studies in which both evoked slow potential and multiple unit neural activity of different brain sites were recorded during classical conditioning in freely moving cats. The recording electrodes were made of 25-75 microns insulated stainless steel or nichrome wires which were inserted into a thin hypodermic needle of a fixed, calibrated length. The fast implantation system described here is based on the use of a stereotaxic frame as a stand for a drill and as a support for an electrode holder with which the electrodes were implanted through precision holes drilled directly according to the coordinates of the …
Hippocampal theta-band activity and trace eyeblink conditioning in rabbits.
2009
The authors examined the relationship between hippocampal theta activity and trace eyeblink conditioning. Hippocampal electrophysiological local field potentials were recorded before, during, and after conditioning or explicitly unpaired training sessions in adult male New Zealand White rabbits. As expected, a high relative power of theta activity (theta ratio) in the hippocampus predicted faster acquisition of the conditioned response during trace conditioning but, contrary to previous results obtained using the delay paradigm, only in the initial stage of learning. The presentation of the conditioned stimulus overall elicited an increase in the hippocampal theta ratio. The theta ratio dec…
Low-energy epicardial pacing in children: the benefit of autocapture.
1999
Abstract Background . Permanent cardiac pacing in children results commonly in augmented energy consumption because of the high pacing rates and the ample stimulation safety margin applied in children. Cardiovascular anatomy and limited venous access sometimes preclude the otherwise preferred endocardial approach. In this multicenter patient series, we studied the feasibility, safety, and energy saving obtained by a combination of steroid-eluting epicardial leads with autocapture devices capable of ongoing adjustment of the stimulation output to the prevailing threshold. Methods . Autocapture devices (Pacesetter Microny SR+ and Regency SR+; Pacesetter, Solna, Sweden) and steroid-eluting epi…
Immediate implants following tooth extraction. A systematic review
2012
Objectives: The aim of this article is to review the current state of immediate implants, with their pros and contras, and the clinical indications and contraindications. Material and Methods: An exhaustive literature search has been carried out in the COCHRANE library and MEDLINE electronic databases from 2004 to November 2009. Randomized clinical trials and clinical trials focused on single implants placed in fresh extraction sockets were included and compared. A meta-analysis could not be performed due to heterogeneity of the data. Results: Twenty studies out of 135 articles from the initial search were finally included, which summed up a total of 1139 immediate implants with at least a …
Estudio biomecánico y correlación clínica de los sistemas de artrodesis cervical anterior caja-placa
2021
Nº Tesis 12712 dentro del Programa de Medicina del Departamento de Cirugía de la Facultad de Medicina y Odontología de la Universidad de Valencia Tutor: Guillermo García-March. Fecha de lectura: 24 de septiembre de 2021. Calificación. Sobresaliente cum laude.
Hippocampal theta (3-8 Hz) activity during classical eyeblink conditioning in rabbits
2007
In 1978, Berry and Thompson showed that the amount of theta (3–8 Hz) activity in the spontaneous hippocampal EEG predicted learning rate in subsequent eyeblink conditioning in rabbits. More recently, the absence of theta activity during the training trial has been shown to have a detrimental effect on learning rate. Here, we aimed to further explore the relationship between theta activity and classical eyeblink conditioning by determining how the relative power of hippocampal theta activity [theta/(theta + delta) ratio] changes during both unpaired control and paired training phases. We found that animals with a higher hippocampal theta ratio immediately before conditioning learned faster a…
Narrow-diameter implants: Are they a predictable treatment option? A literature review
2013
Objective: To evaluate the predictability of narrow-diameter implants as a treatment option in routine clinical practice. A literature review was performed of studies reporting clinical results obtained with these implants. Survival rates, peri-implant bone loss and related complications were evaluated. The working hypothesis was that narrow-diameter implants offer clinical results similar to those obtained with implants of greater diameter. Material and Methods: A Medline-PubMed search covering the period between 2002 and 2012 was carried out. Studies published in English and with a follow-up period of at least 12 months were considered for inclusion. A manual search was also conducted in …
Implantes cortos en la rehabilitación de pacientes desdentados posteriores con crestas atróficas. Estudio de casos-controles con seguimiento de 1 has…
2015
Los implantes dentales suelen ser el tratamiento de elección para las ausencias dentales. Sin embargo, la disponibilidad ósea en los sectores posteriores maxilares y mandibulares se ve comprometida frecuentemente por la presencia de estructuras anatómicas importantes como el nervio alveolar inferior o el seno maxilar. Los implantes cortos son una alternativa de tratamiento, pero se ha planteado que su reducida longitud puede comprometer el éxito del tratamiento. Los objetivos de esta tesis son analizar el éxito y la pérdida ósea de los implantes cortos y analizar los factores de riesgo. Material y método: se incluyeron 177 pacientes con 435 implantes de 8,5 mm de longitud (7 mm intraóseos) …