Search results for "bula"

Effects of mandibular setback surgery on upper airway dimensions and their influence on obstructive sleep apnoea - a systematic review.

2015

Abstract Background Mandibular setback used to be the traditional treatment of choice for correcting mandibular prognathism. Nowadays, bimaxillary surgery is preferred. Several authors have asserted that mandibular setback causes a relative narrowing of the upper airway (UA) that could trigger obstructive sleep apnoea (OSA); however, its potential role in OSA development is still much debated. Another controversial subject is whether changes in airway space caused by the procedure are permanent. Objectives To ascertain the consequences for UA size and shape of mandibular setback surgery in comparison with bimaxillary surgery (maxillary advancement with Le Fort I and mandibular setback), and…

Wielbarské vlivy v Čechách a na Moravě

2015

Atomic layer deposition of Ti-Nb-O thin films onto electrospun fibers for fibrous and tubular catalyst support structures

2018

Here, the authors report on the preparation of core-shell carbon-ceramic fibrous as well as ceramic tubular catalyst supports utilizing electrospinning and atomic layer deposition (ALD). In this paper, ALD of Ti-Nb-O thin films using TiCl4, Nb(OEt)5, and H2O as precursors is demonstrated. According to the time-of-flight-elastic recoil detection analysis and Rutherford backscattering spectrometry, carbon and hydrogen impurities were relatively low, but depend on the pulsing ratio of the precursors. Optimized ALD process was used for coating of sacrificial electrospun polyvinyl alcohol (PVA) template fibers to yield tubular Ti-Nb-O structures after thermal or solution based PVA removal. Anoth…

The Use of Atomic Force Microscopy in Determining the Stiffness and Adhesion Force of Human Dentin After Exposure to Bleaching Agents

2009

Introduction: Oxidant bleaching agents may induce several alterations on mineralized teeth tissues. Our aim is to study,at the ultrastructurallevel,mechanicalmodifications induced on dentin after exposure to different bleaching agents.Methods: Nanoindentation performed with atomic force microscopy was used to measure changes in dentin stiffness as well as the adhesion force between the tip and the tissue both in intertubular and peritubulardentin.Foreachspecimen,dentinlocalization, and bleaching agent, 100 independent nanoindentations were performed. Carbamide peroxide (30%) and hydrogenperoxide(35%) wereusedasbleaching agents. Results: A significant reduction of both stiffness and adhesion…

The effects of linearly increasing flip angles on 3D inflow MR angiography

1994

As recently demonstrated, spin saturation effects in 3D time-of-flight (TOF) MR angiography (MRA) can be reduced by using RF pulses with linearly increasing flip angles (ramp pulses) in the main direction of flow. We developed a model for calculating the signal distribution of proton flow within the excitation volume (slab) for different ramp slopes and compared the results with the measured distribution for the lower-leg arteries. The ramp pulses were generated using the Fourier transformation of the desired excitation profiles. With a bandwidth of 6 kHz and a pulse length of 2.56 ms satisfactory ramps with variable slopes were generated and applied in a standard flow-compensated 3D FISP s…

Reflection-refraction effects on light distribution inside tubular photobioreactors

2017

One of the main parameters affecting autotrophic algae cultures is photon absorption distribution inside the photobioreactor. This clearly depends on the geometry of both the radiation source and the photobioreactor, as well as on algae suspension optical properties. In this work the local volumetric rate of photon absorption LVRPA in a cross-section of a horizontal-pipe photobioreactor was investigated by means of simplified Monte Carlo simulations. In particular, the fate of a number of photons perpendicularly hitting the photobioreactor circular section was simulated in relation to different values of algae concentration. The model takes into account refraction/reflection phenomena at th…

Anodic Electro Deposition of CeO2 and Co-Doped CeO2 Thin Films

2013

CeO2 and Co containing CeO2 thin films were deposited on indium tin oxide and stainless steel by anodic electrodeposition. Scanning electron microscopy showed that the films are flat and show globular morphology and cracks resulting from volume shrinking. According to XRD and Raman Spectroscopy pure ceria layers are crystalline, while the presence of Co induces the formation of amorphous films. The good adhesion and the compactness allowed the photoelectrochemical characterization of the films. A band gap value of 2.9 eV was estimated for CeO2, while slightly higher values (̃3.0 eV) were estimated for Co containing films. A mechanism for ceria anodic electrodeposition is proposed and discus…

Association between mandibular second molars calcification stages in the panoramic images and cervical vertebral maturity in the lateral cephalometri…

2019

Background Determination of maturation and evaluation of growth potential is extremely important in clinical orthodontics. The purpose of this study was to evaluate the diagnostic performance of the mandibular second molar calcification stages for identification of growth phases. Material and Methods In this cross-sectional descriptive study, samples were derived from panoramic radiographs and lateral cephalograms of 125 subjects (61 males and 64 females) with age ranging from 8 to 17 years and estimates of dental maturity (Demirjian Index [DI]) and skeletal maturity (Cervical vertebral maturation indicators CVMI]) were made. Correlations between DI and CVMI were shown by Spearman's correla…

Sejas un žokļu traumas Paula Stradiņa Klīniskajā Universitātes slimnīcā

2020

Sejas un žokļu traumu ietekme uz hospitalizācijas ilgumu un neiroloģisko simptomātiku Paula Stradiņā Klīniskajā Universitātes slimnīcā. Viena no plašākajām traumu kategorijām, kas tieši pieder pie jebkuras valsts galvenajām sociālekonomiskajām problēmām un skar visus pasaules iedzīvotāju slāņus, un ir galvaskausa, sejas un apakšžokļu traumas. Sejas traumas ir bieži izplatītas, jo seja ir visatklātākā un neaizsargātākā ķermeņa daļa ar nelielu aizsargpārklājumu. Mutes dobuma un augšžokļa sejas traumas, papildus sejas estētikai, ietekmē tādas funkcijas kā elpošana, košļāšanas, rīšanas un runas funkcijas. Darba mērķi: noskaidrot FISS skalas ietekmi uz pareģojošo pacientu hospitalizācijas ilgumu…

Traitement chirurgical des fractures du condyle mandibulaire de l'adulte en France en 2005

2007

Summary Introduction The authors had for aim to present the latest trends in the surgical management of mandibular condylar fractures in France, in 2005. Material and methods One hundred maxillofacial surgeons were questioned on the surgical management of condylar fractures and indications. Results were presented at the 41st Congress of Stomatology and Maxillofacial surgery. Results The overall reply rate was 70%. Condylar fractures are generally managed in teaching hospitals. Open reduction and fixation was deemed appropriate in low subcondylar fractures in 76% of the cases, in 10% for diacapitular fractures. Therapeutic details and indications were a matter of huge variability. Discussion…