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Fr 25.11.2022
15:45
- 17:15
EG | Foyer 3+H

Modern zirconia materials: clinical implications

Abstract

Yttria-partially-stabilized tetragonal zirconia polycrystalline ceramic (YTZP) represents an important prosthodontic therapy option in aesthetically pleasing, allceramic dental restorations. Its main advantages are chemical inertness, bio-compatibility and exceptionally high strength and fracture toughness. In the past decade there have been major advances in the application of yttria partially stabilized zirconia (Y-TZP) ceramics for dental restorations. Zirconia frameworks are produced mainly by CAD-CAM machining followed by sintering. This way fixed partial dentures are commonly produced and there is a large evidence of clinical success of such restorations.

Additive manufacturing (AM), also known as 3D printing, is an emerging, next-generation manufacturing technology capable of accurately forming monolithic objects with an intricate design, like FDPs. In the AM process, a component is generated from a virtual model by an additive, layer-wise deposition of the material to form a final part of complex geometries. Compared to subtractive methods (SM), AM reduces material waste and tooling stresses associated with the milling of ceramics. It also allows lower production costs compared to SM, faster production of customized dental pieces with substantial freedom available in the design and fabrication process

In table clinic some indications for the use of Y-TZP ceramics in removable prosthodontics, will be shown and discussed. Y-TZP ceramics are used for the extracoronar attachments and milled bars. A double crown technique has also been introduced, that uses this strong material. In a classic double crown techique both, primary and secondary crown are cast from semiprecious or precious alloy. Retention of the system is primarily based on the friction between the vertical walls abd occlusal wedging. In addition additively manufacturing workflow of Y TZP will be elaborated and first printed restorations shown. Various implant supported clinical cases will be presented.

Referierende

Modern zirconia materials: clinical implications

Abstract

Yttria-partially-stabilized tetragonal zirconia polycrystalline ceramic (YTZP) represents an important prosthodontic therapy option in aesthetically pleasing, allceramic dental restorations. Its main advantages are chemical inertness, bio-compatibility and exceptionally high strength and fracture toughness. In the past decade there have been major advances in the application of yttria partially stabilized zirconia (Y-TZP) ceramics for dental restorations. Zirconia frameworks are produced mainly by CAD-CAM machining followed by sintering. This way fixed partial dentures are commonly produced and there is a large evidence of clinical success of such restorations.

Additive manufacturing (AM), also known as 3D printing, is an emerging, next-generation manufacturing technology capable of accurately forming monolithic objects with an intricate design, like FDPs. In the AM process, a component is generated from a virtual model by an additive, layer-wise deposition of the material to form a final part of complex geometries. Compared to subtractive methods (SM), AM reduces material waste and tooling stresses associated with the milling of ceramics. It also allows lower production costs compared to SM, faster production of customized dental pieces with substantial freedom available in the design and fabrication process

In table clinic some indications for the use of Y-TZP ceramics in removable prosthodontics, will be shown and discussed. Y-TZP ceramics are used for the extracoronar attachments and milled bars. A double crown technique has also been introduced, that uses this strong material. In a classic double crown techique both, primary and secondary crown are cast from semiprecious or precious alloy. Retention of the system is primarily based on the friction between the vertical walls abd occlusal wedging. In addition additively manufacturing workflow of Y TZP will be elaborated and first printed restorations shown. Various implant supported clinical cases will be presented.

Referierende

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