Dental Ceramic Layering Techniques

Over the last decade it has been observed that there is an increasing interest in the ceramic materials in dentistry.

Dental ceramic layering techniques.

It is a thin layer positioned directly on the metal framework. 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. Applied or add on glaze. The amount of abutment prepared should be greater than that in a full porcelain crown.

Some of the techniques are rather complex using numerous shades and layers making them difficult to learn and use in daily practice. Shade with depth in a metal ceramics system can be obtained only with a sufficient thickness of translucent porcelain. 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. 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.

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 technician illusion layering technique pfm dentine free pfm looks all ceramic. For certain dental prostheses such as three unit molars porcelain. Layer 1 primary or opaque layer.

Dental ceramics are sensitive to microcracks that show up on surfaces. Dental over glazes are composed of clear colorless low fusing glass powder painted on the fired crown surface. 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.

The background for basic techniques for building porcelain layers is explained with photographs in this chapter. 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. During build up the technician takes into account all the information received from the dental office shade other details. Esthetically these materials are preferred alternatives to the traditional materials in order to meet the patients demands for improved esthetics.

Dental ceramics is applied in several layers normally 4 but it can be more.