[PDF] Top 20 Los retos de la investigación en abierto para las universidades

... Since cyclic loading is similar to the blade technique, this method was used in our ...that cyclic loading would decrease the SBS [2, 9, 14, 22], the present results showed that SBS was not ... See full document

... A total number of 80 human permanent incisors, without caries, obvious defects, or attrition, extracted for peri- odontal causes over a period of 6 months, were selected for this study. The teeth were thoroughly ... See full document

... the bond strength of orthodontic ...in bond strength values when CPP-ACP agents were applied before acid-etching ...bracket bond strength ...in shear bond ... See full document

... (lb). Bond strength is defined as the force of debonding divided by the area of the bonded interface measured in units of megapascals (MPa), kilograms per square centimeter (kg/cm 2 ), pounds per square ... See full document

... complex cyclic loading of chewing, alcohol-containing fluids, temperature variations, and food consistency, all of which make it difficult to specif- ically determine the reasons for failure ...in ... See full document

... the effect of fluoride and CPP-ACP on the bond ...a study conducted by Damon et al. [11] and Bishara et al. [12], the shear bond strength was not affected by various ... See full document

... earlier study conducted by Dunn it was suggested that Orthodontic brackets bonded to teeth with an ACP containing composite material failed at significantly lower forces than brackets bonded ... See full document

... for orthodontic bonding, mechanical or chemical pre-treatments of the surface is essential for successful direct bonding to ...bonding brackets to porcelain surfaces, but they fail to provide clinically ... See full document

... the bond strength achieved with Transbond alone, was the lowest compared to bond strengths achieved when additional mechanical surface preparation, such as diamond bur or air abrasion, was ...a ... See full document

... no effect on composite restoration surfaces; therefore, creating micromechani- cal retention is difficult in such surfaces ...acceptable bond strength values [3, 9, 12, ...mean shear ... See full document

... this study was to comparatively evalu- ate shear bond strength of stainless steel bracket using conven- tional halogen light and light-emitting diode (LED) curing ...in vitro ... See full document

... Roth brackets (Or- tho Technology, Tampa, USA) was done either by using the bonding agent Monobond S (Ivoclar Vivadent) or Monobond Etch & Prime (Ivoclar ...240 brackets were used in this study, ... See full document

... In contrast to this study, Uysal et al. [21] and Bishara et al. [25] reported that both the whitening treatment with 35 % hydrogen peroxide and 10 % carbamide peroxide did not affect the bond ... See full document

... The shear bond strength also depends on the adhesive ...this study, all data were obtained with Transbond XTTM, which strongly associated with previous studies ...the brackets tested ... See full document

... Metal brackets (Dentaurum, Discovery, Germany) were placed on buccal surface of teeth, 4 millimeter from cusp tip, and fitted completely on the tooth surface using a scaler ...Then brackets were light-cured ... See full document

... to bond orthodontic brackets to teeth should neither fail during the treatment period, resulting in treatment delays, untoward expenses or patient inconvenience nor should it damage the enamel on ... See full document

... chemical bond between the resin infiltrant and the adhesive ...similar effect of the enamel protective material with the two types of adhesive ...[36] study that found using ICON as preconditioning ... See full document

... the effect of addition of silver nanoparticles and QAS to primer and adhesive and showed that addition of these compounds had no significant effect on bond strength and yielded a bond ... See full document

... mean shear bond strength ...Tomy brackets, with its circular concave base, produced greater bond strength than did the mesh-based brackets; among the mesh-based ... See full document

... in-vitro study was conducted in Saudi Arabiaat Qassim University, Al-Qassim, and King Saud University, Riyadh, from December 2016 to March 2017, and comprised extracted maxillary and mandibular premolars ... See full document