Dental application of glass-ceramic materials for aesthetic restoration

Bae,  Tae Sung

J Korean Dent Assoc > Volume 58(7); 2020 > Article

The Journal of The Korean Dental Association 2020;58(7):435-442.
Published online July 31, 2020.

심미수복을 위한 글라스-세라믹 재료의 치과 응용

배태성

전북대학교 치과대학 치과생체재료학교실

Dental application of glass-ceramic materials for aesthetic restoration

Tae Sung Bae

Department of Dental Biomaterials, School of Dentistry, Chonbuk National University

Abstract

Porcelain is the first ceramic material to be introduced into dentistry. Porcelain jacket crown was introduced by Dr. Charles H Land in 1886, which was an excellent aesthetic dental restoration but has not been widely used due to high firing shrinkage and low tensile strength. Then metal-ceramic system, which combines the esthetic properties of ceramics and the mechanical properties of metals, was introduced and nowadays it is still used in dental clinical field. However, the metal-ceramic system has shown some problems, such as increased lightness by reflection of light at opaque layer, shadow beneath the gingival line due to the block-out of light by metal coping, exposure of metal in margin part, bond failure between metal and porcelain, oxidation of metal coping during firing the porcelain, etc. Recently, along with the advance of fabrication methods of dental ceramics, the all-ceramic restorations with high esthetic and mechanical properties has increased and gradually replaced metal-ceramic restorations. Especially, CAD/CAM technology has opened a new era in fabricating the dental ceramic restorations. This overview will take a look at the past, present and future possibility of the dental ceramic materials.

Key Words: All-ceramic materials;Heat pressing technique;Machinable ceramic block;Lithium disilicate crystal;