ABSTRACT
However, dental porcelains and ceramics are brittle materials, which generally fail in tension due to their limited ductility, which restricts the ability to absorb a great deal of elastic strain energy before fracture. A major weakness of these materials is the sensitivity to flaws, which may have developed as a result of thermal, chemical or mechanical processes, and act as local stress raisers. At a certain
In the last three decades, the aesthetic requirements came to occupy the place of great prominence in the dental office. Patients now have a greater need to possess a harmonious smile as a prerequisite to the good life in society and consequent career advancement. This quest boosts investments in the dental industry esthetic restorative materials and techniques in order to meet such market needs.
