leucite

Although they are called rare elements, they are not rare at all, as they are more plentiful and abundant than silver, gold, and platinum, and the least plentiful elements of the REE are leucite and thulium.

Leucite is created in dental porcelain by increasing the potassium oxide (chemical formula K2O) content of the aluminosilicate glass.

Silicate minerals, such as K-feldspar, leucite, nepheline, kalsilite, muscovite, biotite and phlogopite, can readily provide K to plants.

evaluated the influence of a restorative material type on the biomechanical behavior of endocrown restorations and concluded that Leucite presents a better stress distribution and it can be a promising alternative to lithium disilicate for the manufacture of endocrown restorations [28].

Despite its superior physical properties, the leucite reinforced ceramic core (Group C) showed 2 to 4 times more wear over 32 years of CST when compared with other test groups.

Porcelain which is used for making dental prosthesis comprises glass matrix and leucite crystalline phase, the later consisting of various elements particularly Si (57-66%), Ba2+ (15-25%), Al3+ (7-15%), Na+(7-12%), K+(7-15%) and lithium ion (Li+)(0.5-3%).

On the other hand Glass based ceramics like Leucite reinforced glass ceramic has gained popularity among dentists for the past 20 years due to its excellent esthetics.17 The introduction of Lithium disilicate glass ceramics lead to further advancement by the development to IPS E.

This pressed glass- ceramic has an improved flexural strength and fracture toughness as compared to others (leucite reinforced ceramics) and demonstrates abrasion resistance, chemical durability and optical properties well within the dental standards.1