Dental Ceramic Layering Techniques

Feldspathic veneers and crowns use a layering technique where layers of porcelain are laid down and the tooth is grown much like a pearl or natural tooth grows to create feldspathic veneers.

Dental ceramic layering techniques.

Dental ceramics is applied in several layers normally 4 but it can be more. Esthetically these materials are preferred alternatives to the traditional materials in order to meet the patients demands for improved esthetics. Some of the techniques are rather complex using numerous shades and layers making them difficult to learn and use in daily practice. Layer 1 primary or opaque layer.

In this article a simple and predictable restorative technique will be described that concentrates on the recreation of dental tissues of natural thickness layer by layer. Shade with depth in a metal ceramics system can be obtained only with a sufficient thickness of translucent porcelain. Normally the porcelain has the ability to glaze itself by forming a vitrified layer on the surface of dental porcelain ceramic containing a glass phase b. The amount of abutment prepared should be greater than that in a full porcelain crown.

During build up the technician takes into account all the information received from the dental office shade other details. Today s ceramic restoration application despite its popularity gained through esthetical advantages and superior hygienically features has a fragile structure due to its low tensile strength quality. Dental over glazes are composed of clear colorless low fusing glass powder painted on the fired crown surface. Applied or add on glaze.

Traditionally fixed partial dentures fpds produced with a metallic infrastructure and a ceramic veneering layer have excellent clinical performance with studies showing an annual failure rate around 1 and a survival rate of 94 after 5 years of clinical follow ups. For certain dental prostheses such as three unit molars porcelain. Over the last decade it has been observed that there is an increasing interest in the ceramic materials in dentistry. It is a thin layer positioned directly on the metal framework.

The background for basic techniques for building porcelain layers is explained with photographs in this chapter. This gives a natural vivid lustrous appearance to the veneers that create the most natural life like smile makeovers that can be achieved. In the long run it can lose its endurance against shear and draw strengths that occur while chewing. 23 although these metal ceramic bilayers are still considered the gold standard for fpds.

Dental ceramics are sensitive to microcracks that show up on surfaces.