Bøger af Surender Kumar

Ceramic materials have been used in dentistry for well over 200 years. They are the most biocompatible dental restorative materials, chemically very stable. A desirable feature of ceramics is that their appearance can be customized to simulate the colour, translucency and fluorescence of natural teeth. A major problem with ceramics is its structure only exhibits a very low flexibility before fracture. Newer ceramic materials and innovative ceramic processing techniques have been introduced in restorative dentistry since the early 1980¿s. recent advances includes; the advent of predictable ceramic materials and techniques for esthetic complete crowns, partial coverage and laminate veneer restorations; improved metal ceramic esthetics with the advent of opalescent porcelains and framework modifications; Introduction of CAD/CAM and machining as a route to fabrication of restorations; improved understanding of the clinical response of all ceramic prostheses and of the material factors that influence clinical longevity.

This book provides a look at the current status and future potential of sustainable development in India. It includes detailed policy scenarios, which offer quantitative assessments of the potential benefits of a well-designed environmental policy

This book discusses the important issue of the socioeconomic and environmental impacts of agricultural residue burning, common in agricultural practices in many parts of the world. The burning of agricultural residue causes severe pollution in land, water and air and contributes to increased ozone levels and climate change in the long term.