Rotor cage faults as broken rotor bars, increased bars resistance and end-ring faults can be caused by thermal stresses, due to overload, overheating and thus mechanical stresses, magnetic stresses and dynamic stresses due to shaft torques. Environmental stresses as contamination or abrasion also contributes to the rotor cage faults. The rotor cage faults can also lead to the shaft vibration an...

Subcutaneous emphysema of the face or neck which may extend into the mediastinum can complicate the use of high-speed air-turbine dental drills (1-5) or dental extractions (1). Pneumopericardium with subcutaneous emphysema has also occurred after maxillary surgery (6). Pneumopericardium, where air may have forced its way through a tear in the mucous membrane of the upper respiratory passages, h...

The role of salivary media is essential during mastication and ingestion processes; yet it can hinder the performance of foreign materials in the oral cavity. The aim of this study was to examine the effects of applied load and applied electrical potential on the tribo-corrosion mechanisms of 316L stainless steel in an environment similar to oral cavity conditions. 316L stainless steel is a mat...

Prevention of more invasive restorative treatment modalities requires early caries diagnosis which dental clinicians face during everyday practice. The primary visual inspection method has partial reliability for detecting noncavitated lesions, especially on proximal surfaces. Thus, dentists regularly prefer bitewing radiographs as an adjunct method for diagnosis of the carious lesions. Many ra...

In reference to the evolutionary trend of increasing cheek tooth height in herbivorous ungulates, the causes of dental abrasion have long been debated. Interspecific comparisons of extant ungulates have revealed that both phytoliths in grass and external abrasive matter may play important roles. Using analysis of extant sika deer living in various environments and showing continuous latitudinal...

Alveolar ridge resorption has long been considered an unavoidable consequence of tooth extraction. While the extent and pattern of resorption is variable among individuals, there is a progressive loss of ridge contour as a result of physiologic bone remodeling. Even today, with best modalities of tooth preservation, there is a group of elderly individuals who do not benefit from modern preventiv...

BACKGROUND Minor abrasions and skin tears are usually treated with gauze dressings and topical antibiotics requiring frequent and messy dressing changes. OBJECTIVE We describe our experience with a low-cost, cyanoacrylate-based liquid dressing applied only once for minor abrasions and skin tears. METHODS We conducted a single-center, prospective, noncomparative study in adult emergency depa...

The literature on dental erosion is made up of a number of areas, some of which are reviewed here: there are anecdotal case reports, linking a small number of clinical cases with a possible etiological factor. The second area of evidence concentrates on case control studies in which there is a strong association with dental erosion, for example, patients with bulimia. The final piece of epidemi...

The aim of this paper was to review in vitro and in situ studies that directly compared the use of bovine teeth as a substitute for human teeth in dental experiments. A PubMed search was conducted for papers published from 1953 to December 30, 2010 using the following keywords: "human bovine enamel" or "human bovine dentin" or "human bovine teeth". The abstracts of the studies resulting from th...