With imprecise definitions, inexact measurement tools, and flawed study execution, our clinical science often lags behind bedside experience and simply documents what appear to be the apparent faults or validity of ongoing practices. These impressions are later confirmed, modified, or overturned by the results of the next trial. On the other hand, insights that stem from the intuitions of exper...

objectives: this study aimed to evaluate the effect of storage period on dimensional stability of alginplus and hydrogum 5. materials and methods: in this in vitro experimental study, 60 impressions were taken of an upper jaw typodont, including 10 impressions for each storage period to be tested (12 minutes, 24 and 120 hours) for each type of alginate. then, the impressions were stored in an i...

A study was conducted to compare tissue displacement resulting from different techniques and impression materials for distal-extension ridges. Impression techniques used were Applegate's functional fluid wax and a single-impression technique with mercaptan rubber. A mucostatic impression technique using irreversible hydrocolloid served as control. The results showed a statistically significant ...

Precise transfer of three-dimensional position of dental implants from oral cavity to the cast needs special considerations in impression making. It has been suggested to splint the copings by bars or acrylic resin material before making impression. Some problems regarding to polymerization shrinkage of acrylic resin have been reported. In this study, we describe a metalacrylic bar tha...

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Understanding the distinction between impressions and ideas that Hume draws in the opening paragraphs of his A Treatise on Human Nature is essential for understanding much of Hume’s philosophy. This, however, is a task that has been the cause of a good deal of controversy in the literature on Hume. I here argue that the significant philosophical and exegetical issues previous treatments of this...

Basilar impression, sometimes spoken of as platybasia, is a deformity of the occipital bone and upper end of the cervical spine resulting from anomalous development. It may produce marked pressure effects upon the medulla and adjacent parts of the central nervous system. These pressure effects may simulate syringomyelia, disseminated sclerosis, or progressive spastic paralysis so closely as to ...

This note presents an introduction to the Mizar system, followed by a brief comparison between Mizar and Coq. Appended are a Mizar grammar and an annotated example of a complete Mizar article. 1 What It Is Mizar is a system for representing mathematical proof in a computer such that a program can check the correctness. It has been developed by Andrzej Trybulec and his team in Bialystok, Poland ...