Preconditioning Of All Ceramic Restoration

Ceramic restoration was developed to over come the dis advatages of ceramo metal restoration as.

Preconditioning of all ceramic restoration. Lack of natural translucency. The block aspect improves its inherent strength. In the bi layered all ceramic restoration the. Emax is a specific type of porcelain called lithium disilicate which is fundamentally a block of hard porcelain.

1 2 currently there is a plethora of all ceramic systems available for many clinical applications such as veneers partial. 1 although there is a plethora of all ceramic systems many are becoming obsolete almost as quickly as they were introduced due to the distinct advantages of lithium disilicate and zirconia. Advantages of all ceramic restorations 1. Which all ceramic system is optimal for anterior esthetics.

Since there is a solid connection between the masking ceramic and the metal almost no changes of color will occur in the ceramic construction. All ceramic restorations are fabricated indirectly and require at least two appointments to be delivered. No one ceramic material is the best based on individual case selection 35. All ceramic restorations are not effective as retainers for a fixed dental prosthesis although the strongest of the slip cast materials in ceram zirconia and the higher strength pressed systems ips empress 2 may be suitable for anterior applications the brittle nature of porcelain necessitates that connectors of large cross sectional dimension a minimum of 4 4 mm is recommended.

It contains about 90 by volume crystalline phases as reinforcing agents. The wide range of clinical applications for. Metal ceramic and all ceramic restorations. Due to improvements in materials and the sustained demand for esthetic and metal free restorations the use of all ceramic restorations has become ubiquitous.

1 failure chipping fracture and chipping of all ceramic restorations are similar to those of mcr s. The biggest advantage of the ceramic restoration is its permanent aesthetic quality. Monolithic crowns seem the way to go. In an all ceramic restoration the ceramic material may be monolithic uni layer and consist of a single ceramic material or it may consist of a ceramic core material that is covered with a ceramic veneer beuer et al 2009 sharkey 2010 and is known as a bi layered all ceramic restoration.

High biocompatible because it is inert. Predictable strength and reasonable esthetics have made metal ceramic restorations popular for the past 50 years. The additional laboratory fees make this type of restoration more expensive than other direct restorations 5 disadvantages.