The causes of subcutaneous emphysema of relevance to dental practitioners?

Data sources An electronic search was conducted using EMBASE, LILACS, PubMed, SciELO, Scopus, Web of Science, and two grey literature data sources. All issues of nine dentistry journals and relevant chapters in four endodontic textbooks were manually searched.Study selection Abstracts of all the studies that were identified during the electronic and manual searches were obtained and screened independently by two reviewers in order to select clinical studies, case series, or case reports describing subcutaneous emphysema that occurred in adult patients during or immediately after root canal treatment.

Degenerative and regenerative morphological aspects in peri-implantitis.

The purpose of this study was to describe the tissues surrounding two early failed dental implants morphologically and ultrastructurally. In the first case, the implant's surface was analyzed by scanning electron microscopy (SEM) using an environmental scanning electron microscope and the surrounding tissues were analyzed by light microscopy (LM) and transmission electron microscopy. In the second case we used only LM.

Methamphetamine-induced neuronal necrosis: the role of electrographic seizure discharges.

We have evidence that methamphetamine (METH)-induced neuronal death is morphologically necrotic, not apoptotic, as is currently believed, and that electrographic seizures may be responsible. We administered 40mg/kg i.p.

Intercellular communication by extracellular vesicles with emphasis on the roles of cordocytes in the human brain. An ultrastructural study.

We describe in this work the presence of extracellular vesicles (EVs) along different cell types, especially cordocytes, in various clinical conditions of the human brain (atherothrombotic disease, cerebral tumors, hygroma durae matris, intracerebral cysts, Moyamoya disease and parenchymatous hematoma) using transmission electron microscopy (TEM). EVs, illustrated as exosomes and microvesicles, were causally related to cell-to-cell communication, and other vital functions of resident cells around the brain parenchyma, either around the cortical vessels or into the subarachnoid space and the reticular arachnoid. Our direct demonstration by TEM of these information transporters in all locations and situations where the cordocytes play coordinating and regulating roles, producing and delivering a significant number of EVs to their targets, remains to be better documented in future studies.