UNLABELLED Power toothbrushes (PTBs), in combination with abrasive dentifrices, may encourage wear of dental cements at crown margins. PURPOSE This study's purpose was to determine the effect chemical cleaning had on the microbial quality of water emitted from dental unit waterlines (DUWL), 3-way syringes, and power scalers. METHODS Ten randomly selected dental units with attached self-cont...

Black crust, or gypsum crust, is a surficial accumulation of atmospheric deposits in a gypsum matrix, which is often firmly bonded to the substrate. This condition is ubiquitous on marble buildings, not only threatening the historic fabric, but also leading to aesthetic damage. Laser ablation cleaning has become a popular method to remove black crust from masonry surface. This study focuses on ...

Introduction. Data regarding methicillin-resistant Staphylococcus aureus, Legionella pneumophila, Hepatitis B virus suggest that the environment plays an important role in infection transmission in dental healthcare settings. The Centres for Disease Control and Prevention suggest covering clinical contact surfaces with disposal barriers or disinfecting them between patients. Both methods have d...

Gasification is one of the promising technologies to convert biomass to gaseous fuels for distributed power generation. However, the commercial exploitation of biomass energy suffers from a number of logistics and technological challenges. In this review, the barriers in each of the steps from the collection of biomass to electricity generation are highlighted. The effects of parameters in supp...

We investigated one-step, rapidly cleaning, and annealing thin wire copper using plasma generated by Dielectric-Barrier Discharge (DBD) at atmospheric pressure in a coaxial cylindrical reactor. The thin copper wire cleaning and annealing processes strongly depend on the input power, the dimensions of the reactor, and the annealing duration. The minimum input power was calculated under stable an...

objective: the aim of this study was to evaluate and compare the cleaning ability and instrumentation time of manual and rotary methods used for preparation of primary anterior teeth. materials and methods: forty-four primary anterior teeth were used in this experimental study. access cavities were prepared and india ink was injected into the canals. the samples were divided into three groups a...

Water purification methods are considered. Parallel and block ways of water preparation for low medium pressure boilers, its advantages disadvantages written. Treatment feed with an industrial filter is carried out using parallel systematic cation schemes h, Na. The specific consumption sulfuric acid was determined RD 34.10.414 – 88 34.10.415 88. Calculations were made depending on the thicknes...