Net-zero emissions energy systems.

Some energy services and industrial processes-such as long-distance freight transport, air travel, highly reliable electricity, and steel and cement manufacturing-are particularly difficult to provide without adding carbon dioxide (CO) to the atmosphere. Rapidly growing demand for these services, combined with long lead times for technology development and long lifetimes of energy infrastructure, make decarbonization of these services both essential and urgent. We examine barriers and opportunities associated with these difficult-to-decarbonize services and processes, including possible technological solutions and research and development priorities.

A bibliometric analysis of two PubMed-indexed high-impact factor endodontic journals: A comparison of India with other countries.

Aim: The present study was conducted with an aim to determine the number and trends of published articles in the International Endodontic Journal (IEJ) and Journal of Endodontics (JOE) from 2009 to 2014.

Settings And Designs: A retrospective observational study was conducted for IEJ and JOE.

Subjects And Methods: All issues of IEJ and JOE were electronically and hand searched for the following parameters: Amount of papers, publication year, affiliated organizations, and countries.

Dentin dysplasia type 1d: a rare case.

Dentin dysplasia is a rare hereditary disturbance of dentin formation characterized by a defective dentin development with clinically normal-appearing crowns, severe hypermobility of teeth and spontaneous dental abscesses or cysts. Radiographic analysis shows obliteration of all pulp chambers by pulp stones, short, blunted and malformed or absent roots, peri-apical radiolucencies of noncarious teeth. We present a case of dentin dysplasia type 1d in a 19-year-old boy along with the clinical, radiographic findings of this condition and treatment.

Corono-radicular biological restoration of maxillary central incisors by direct method.

This case report refers to the esthetic and functional restorations of extensively damaged maxillary central incisors with dental caries in a 32-year-old woman, with the use of posts and crowns made from natural extracted teeth. Proper restoration of such teeth with the use of natural teeth fragments are known as "biological restoration." Biological restorations can be done by using the fragments of the patients own tooth and if that is not available, tooth fragment can be obtained from an extracted tooth.

Pathogenesis and nomenclature of odontogenic carcinomas: revisited.

Odontogenic carcinoma is rare group of malignant epithelial odontogenic neoplasms with characteristic clinical behavior and histological features, which requires an aggressive surgical approach. The pathogenesis of this rare group remains still controversial and there have been many varied opinions over the classification of this rare group of lesions. As there have not been many reviews on odontogenic carcinoma, the existing knowledge is mostly derived from the published case reports.