With the aim of developing a method for reducing energy consumption of room air conditioners, we address a higher-efficiency design of the rotary compressor currently most used worldwide. We focused on a new rotary compressor equipped with a mechanism to restrict the rolling motion of the piston, and performed a dynamics analysis. The new rotary compressor has a small pillar at the tip of the v...

OBJECTIVES The aim of this in vitro study was to compare the efficacy of two retreatment rotary systems in the removal of Gutta-percha (GP) and sealer from the root canal walls with or without solvent. MATERIALS AND METHODS Forty-eight extracted human mandibular first premolars were prepared and obturated with GP and AH Plus sealer. Samples were then randomly divided into four groups. Group I...

Differences in the dynamics of powder densification between eccentric and rotary machine were pointed out by compressing at different compression pressures microcrystalline cellulose, lactose monohydrate and dicalcium phosphate dihydrate and recovering the corresponding stress/strain data in both machines equipped to monitor punches displacement and compression forces. Heckel plots were then ob...

The correct dressing selection is of vital importance in producing as rapid a healing response as possible. John Timmons demonstrates the effects of a new dressing for the treatment of coumarin necrosis. Coloplast, the manufacturers of the dressing, Biatain Adhesive, supported the author while he was treating the patient.

Watches bene�t from a long design history. Designers and engineers have successfully built devices using rotary physical inputs such as crowns, bezels, and wheels, separately or combined. Smart watch designers have explored the use of some of these inputs for interactions. However, a systematic exploration of their combinations has yet to be done. We investigate the design space of interactions...

Introduction: Although rotary instrumentation has been widely studied in permanent dentition, it is a rather new field of study concerning primary teeth. Purpose: We aimed to evaluate apical displacement and time needed for instrumentation of root canals of primary molars by manual and rotary techniques. Materials and Methods: Root canals of 144 extracted first and second primary maxillary mola...

BACKGROUND In endodontic therapy, continuous rotary instrumentation reduced debris compared to reciprocal instrumentation, which might affect the incidence of post-endodontic pain (PP). The aim of our study was to assess whether PP incidence and levels were influenced by the choice of rotary or reciprocal instruments. METHODS In this meta-analysis the Pubmed and EM databases were searched for...

Introduction The cost of Catheter Related Bloodstream Infections (CRBSI) is substantial both in terms of morbidity and in terms of financial resources expended [1]. Rationale of current study was to evaluate two different dressing methods, chlorhexidine soaked gauze dressing and standard transparent polyurethane dressing in order to devise local guidelines for better infection control measures ...

objective(s): the aim of this study was to insert nitrofurazone in a chitosan membrane to be used as a wound dressing.   materials and methods: several blend films using chitosan (cs) and polyvinyl alcohol (pva), containing nitrofurazone were prepared by means of casting/solvent evaporating technique. different characteristics such as mechanical properties, water vapor transmission rate (wvtr),...