Connecting prostheses to the implant abutments has become a concern and achieving a satisfactory retention has been focused in cement-retention prostheses recently. Sandblasting is a method to make a roughened surface for providing more retention. The aim of this study was to compare effects of nano and micro airborne abrasive particles (ABAP) in roughening surface of implant abutments and furt...

PURPOSE To evaluate the cytotoxicity of temporary luting cements on bovine dental pulp-derived cells (bDPCs). MATERIALS AND METHODS Four different temporary cements were tested: Rely X Temp E (3M ESPE), Ultratemp (Ultradent), GC Fuji Temp (GC), and Rely X Temp NE (3M ESPE). The materials were prepared as discs and incubated in Dulbecco's modified eagle's culture medium (DMEM) for 72 hours acc...

The objective of this study was to investigate the antimicrobial activity of ethanol extract of propolis against enterotoxigenic strain of MRSA which inoculated into lab prepared ice cream. EEP was added to ice cream in 3 concentrations (150, 300 and 600 mg/L). The prepared ice cream was divided into 2 groups, one stored at freezer temp. at (-5°C), while the other was kept in deep freezer temp....

BACKGROUND In mechanically ventilated patients, we investigated how positioning the heat and moisture exchanger (HME) at different places on the ventilator circuit affected inspiratory gas humidification. METHODS Absolute humidity (AH) and temperature (TEMP) at the proximal end of endotracheal tube (ETT) were measured in ten mechanically ventilated patients. The HME was connected either direc...

Insertions and excisions of transposable elements (TEs) affect both the stability and variability of the genome. Studying the dynamics of transposition at the population level can provide crucial insights into the processes and mechanisms of genome evolution. Pooling genomic materials from multiple individuals followed by high-throughput sequencing is an efficient way of characterizing genomic ...

We consider a generalization of the secretary problem where contracts are temporary, and for a fixed duration γ. This models online hiring of temporary employees, or online auctions for re-usable resources. The problem is related to the question of finding a large independent set in a random unit interval graph.

SIR,-We refer to the article by Dr. I. K. Crombie (1981) on the distribution of malignant melanoma on the body surface. Unfortunately, the author's calculations of the proportional distribution by site of total body melanocytes may be erroneous. In his Table III, the proportions of body surface area at different sites appear to have been transposed, such that the surface area of the upper limb ...

We study interactions between electrons and nuclear spins by using the resistance ( Rxx) peak which develops near the Landau-level filling factor nu = 2/3 as a probe. Temporarily tuning nu to a different value, nu(temp), with a gate demonstrates that the Rxx peak regenerates even after complete depletion ( nu(temp) = 0), while it rapidly relaxes on either side of nu(temp) = 1. This indicates th...