Combined Assessment of Cognitive and Balance Abilities to Predict Falls in Patients in the Convalescent Rehabilitation Ward.

Objective: This study aimed to investigate the relationship between falls and cognitive and balance problems in patients.

Methods: This retrospective observational study analyzed the medical records of 1010 older patients admitted to a convalescent rehabilitation ward. The primary endpoint was fall occurrence during ward stays.

Bioactivity of human dental pulp-derived stem cells with boron-controlled S-PRG filler eluate by anion exchange.

Surface pre-reacted glass-ionomer (S-PRG) filler is a bioactive glass filler capable of releasing various ions. A culture medium to which was added an S-PRG filler eluate rich in boron was reported to enhance alkaline phosphatase (ALP) activity in human dental pulp-derived stem cells (hDPSC). To clarify the role of boron eluted from S-PRG fillers, the modified S-PRG filler eluate with different boron concentrations was prepared by using an anion exchange material.

Color changes in bulk-fill resin composites as a result of visible light-curing.

We evaluated twelve commercially available bulk-fill resin composites to determine the colorimetric changes that occurred as a result of the photo-polymerization reaction. Samples of the resin composites were prepared as disks 8 mm in diameter and 3 mm in thickness. A colorimeter was used to measure the color of samples on a black background before and after the polymerization processed had been initiated.

Effects of multi-components released from S-PRG filler on the activities of human dental pulp-derived stem cells.

Numerous studies have shown that the sustained release of ions from dental restorative materials have acid buffering capacity, prevents tooth enamel demineralization, and inhibits bacterial adhesion. Herein, the release behavior and bioresponsiveness of ions released from surface pre-reacted glass-ionomer (S-PRG) fillers were investigated in different types of media based on human dental pulp-derived stem cell (hDPSC) responses. The hDPSCs were cultured for 1-7 days in S-PRG eluates diluted with varying amounts of cell culture media.

Evaluation of bonding performance and multi-ion release of S-PRG fillercontaining self-adhesive resin composite.

The bonding performance of a surface pre-reacted glass ionomer (S-PRG) filler-containing self-adhesive flowable resin composites to enamel and dentin were evaluated using a tensile bond test with thermal cycling. Also, the quantities of various ions released from the materials were measured using ICP atomic emission spectrometry and a fluoride ion electrode. The initial bond strengths of the materials were approximately 6 MPa, and decreased after thermal cycling.

Use of new scratch test and tensile test for evaluation of bond strength of selfadhesive flowable resin composite for repair of artificial tooth erosion.

The purpose of this study was to use a new scratch test and tensile test to evaluate the bond strength between artificial erosive enamel or dentin and self-adhesive resin composites as a coating material. Coronal enamel or dentin surface was exposed to an erosive cycle (artificial saliva [AS], pH:7.0 for 6.

Relationship between thin-film bond strength as measured by a scratch test, and indentation hardness for bonding agents.

Objectives: To evaluate thin-film bond strength between a bonding agent and human dentin, using a scratch test, and the characteristics and accuracy of measurement.

Methods: One-step bonding agents (BeautiBond; Bond Force; Adper Easy Bond; Clearfil tri-S Bond) and two-step bonding agents (Cleafil SE Bond; FL-Bond II) were investigated in this study. Flat dentin surfaces were prepared for extracted human molars.

Adherence of Streptococcus sanguinis and Streptococcus mutans to saliva-coated S-PRG resin blocks.

This in vitro study performed elemental analysis of the ions absorbed into the salivary coat covering the surfaces of S-PRG resin blocks and assessed the adherence of Streptococcus sanguinis and Streptococcus mutans to these saliva-coated S-PRG resin blocks. Elemental analysis of ions absorbed into the salivary coat of resin blocks exposed to the saliva was performed using an inductive coupled plasma atomic emission spectrometer and the fluoride electrode method. Quantitative adherence of radio-labeled test bacteria to the resin blocks was determined.

Antibacterial activity of composite resin with glass-ionomer filler particles.

The purpose of this study was to examine the antibacterial activity of composite resin with glass-ionomer filler particles versus that of contemporary commercial composite resins. Three composite resins were used: Beautifil II (containing S-PRG filler), Clearfil AP-X, and Filtek Z250. Resin blocks were bonded to maxillary first molars, and plaque accumulation on the resin block surface was examined after 8 hours.

Artificial plaque removal from interproximal tooth surfaces (maxillary premolar and molar) of a jaw model.

Purpose: The aim of this study was to compare the ability of the bristles of newly developed toothbrushes in removing artificial plaque deposits from the interproximal areas of a jaw model.

Materials And Methods: Four toothbrushes were evaluated in this study: A, two differences in level patterns, combination of flat and extremely high-tapered filaments; B, one difference in level pattern, combination of flat and extremely high-tapered filaments; C, rippled pattern and high-tapered filaments; and D, rippled pattern and tapered filaments. The brushing simulator was adjusted to provide a horizontal brushing stroke of 20 mm at a rate of 190 strokes per minute for a duration of 1 min.

Comparative radiopacity of bonding agents.

Purpose: The present study was undertaken to determine the content and the constituent elements of inorganic fillers as well as the radiopacity of 15 recently introduced bonding agents and to compare their radiodensities with those of enamel and dentin by using a transmission photodensitometer.

Materials And Methods: The content of inorganic fillers was determined by the ashing method. In addition, x-ray microanalysis was used to identify the constituent elements of the inorganic fillers.

Examination of composite resins with electron microscopy, microhardness tester and energy dispersive X-ray microanalyzer.

This study was conducted to examine the ultrastructures of eight recently improved light-cure restorative composite resins with scanning and transmission electron microscopes (SEM and TEM). Additionally, Vickers hardness, volume/weight fraction of filler, and chemical composition were analyzed. Composite resins selected for evaluation were Beautifil II, Clearfil AP-X, Clearfil Majesty, Estelite sigma, Filtek Supreme, Filtek Z250, Solare, and Synergy.

Shear bond strength of a new fluoride-releasing orthodontic adhesive.

This study evaluated the shear bond strength of stainless steel brackets bonded to enamel with a new fluoride-releasing orthodontic adhesive system. A total of 140 extracted human bicuspids were randomly divided into four groups. Group I (Transbond XT) was a control group in which enamel was etched with phosphoric acid.

Stem durability testing of interdental brush.

The purpose of the present study was to determine the ability of interdental brush to withstand repeated use and to relate this property to clinically observed fractures of such brushes. The stem durability test was conducted according to ISO (International Standards Organization) standard by using a bending at 90 degrees under a 500-g controlled load (ISO/TC106/SC7/ WG3). Two sizes (ss, m) of each of the five commercially available interdental brushes (D, B, P, I, S) were used.

Shear bond strengths of laboratory-cured prosthetic composite to primed metal surfaces.

Purpose: To examine the effect of using metal primers to enhance the shear bond strength of a laboratory-cured prosthetic composite to cast metal surfaces.

Methods: Cast discs (10 mm diam., 2.

Evaluation of tapered-end toothbrush bristles regarding efficacy of access to occlusal fissures.

The purpose of this in vitro study was to determine how two toothbrushes, with a combination of a tapered-end and round-end bristle design (Group A), compared to a conventional toothbrush with only rounded-end bristles (Group B) for cleaning in simulated occlusal fissures on a brushing machine. The fissure width at the surface was 200 microns, and then tapered down to the fissure base depths of 230 and 400 microns. The toothbrushes were positioned 90 or 180 degrees to the fissure groove surface on the model, and a 200 g force was applied to the brush head.