BACKGROUND Tooth replantation after traumatic avulsion or transplantation is a challenge in oral surgery. A special method named auto-alloplastic replantation, in which a titanium post is used after extraoral endodontic treatment, combines several advantages. The treatment is performed in one step with no further endodontic intervention, no wide root canal instrumentation, no recontamination, a...

INTRODUCTION A coronal barrier in root-filled teeth is one of the most effective methods for prevention of coronal microleakage. The aim of this study was to compare coronal microleakage of three materials [light-cured glass-ionomer (GI), mineral trioxide aggregate (MTA), and composite resin] as coronal barriers. MATERIALS AND METHODS A total of 188 intact maxillary incisors were used. After ...

Search games are attractive for their correspondence with classical width parameters. For instance, the invisible search number (a.k.a. node search number) of a graph is equal to its pathwidth plus 1, and the visible search number of a graph is equal to its treewidth plus 1. The connected variants of these games ask for search strategies that are connected, i.e., at every step of the strategy, ...

The wide array of available dairy foods challenges the microbiologist, engineer, and technologist to find the best ways to prevent the entry of microorganisms, destroy those that do get in along with their enzymes, and prevent the growth and activities of those that escape processing treatments. Troublesome spoilage microorganisms include aerobic psychrotrophic Gram-negative bacteria, yeasts, m...

Network decontamination (or disinfection) is a widely studied problem in distributed computing. Network sites are assumed to be contaminated (e.g., by a virus) and a team of agents is deployed to decontaminate the whole network. In the vast literature a variety of assumptions are made on the power of the agents, which can typically communicate, exchange information, remember the past, etc. In t...

introduction: a coronal barrier in root-filled teeth is one of the most effective methods for prevention of coronal microleakage. the aim of this study was to compare coronal microleakage of three materials [light-cured glass-ionomer (gi), mineral trioxide aggregate (mta), and composite resin] as coronal barriers. materials and methods: a total of 188 intact maxillary incisors were used. after ...

In this paper we consider the network decontamination problem in a mobile cellular automata (MCA). The system consists of a two-dimensional lattice that evolves like a cellular automata, where however some cells are in a special active state. Such a state indicates the presence of an agent which also follows a local transition rule to move from cell to neighbouring cell. A dynamic contamination...

OBJECTIVE Studies have demonstrated frequent contamination of stethoscope and usefulness of different disinfectants. Albeit, studies on the precise mode of cleaning and frequency of cleaning are lacking. This study was carried out to determine efficacy of 66% ethyl alcohol as disinfectant, rate of recontamination without cleaning and benefits of daily versus immediate cleaning. METHODOLOGY Pr...

The aim of this study was to evaluate the influence of moisture on apical leakage using five different types of sealer. There were 120 single-rooted teeth instrumented to .02/#60 and randomly assigned to 10 experimental groups, one control group (AH Plus, lateral condensation) (n = 10) or positive/negative controls (n = 5). Before obturation teeth were dried thoroughly, followed by recontaminat...

Ten percent of the world population lack access to safe drinking water. In Pakistan 44% of the 180 million population is without access to safe drinking water, 64% of urban and 84% of rural population do not treat their drinking water and consequently waterborne diseases are the leading cause of mortality and morbidity. High stress in the use of ground and surface water, fast growth in populati...