1 / 17

Glass-ceramics and ceramics as biomaterials for dental restoration

Glass-ceramics and ceramics as biomaterials for dental restoration. W. Höland, V. Rheinberger, E. Apel, Ch. Ritzberger, H. Kappert. Ivoclar Vivadent AG, Li-9494 Schaan, Liechtenstein. Derby, UK, September, 2007. Outline. I. Fundamentals on ceramic and glass-ceramic technology.

makya
Download Presentation

Glass-ceramics and ceramics as biomaterials for dental restoration

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Glass-ceramics and ceramics as biomaterials for dental restoration W. Höland, V. Rheinberger, E. Apel, Ch. Ritzberger, H. Kappert Ivoclar Vivadent AG, Li-9494 Schaan, Liechtenstein Derby, UK, September, 2007

  2. Outline I. Fundamentals on ceramic and glass-ceramic technology • Glass-ceramics as biomaterials for dental restoration • 1. Leucite-apatite • 2. Leucite • 3. Lithium disilicate and apatite III. Ceramics as biomaterials for dental restoration 1. ZrO2 2. Fusion of ceramic and apatite glass-ceramic IV. Summary

  3. I. Fundamentals of ceramic technology I application chemical composition properties microstructure applied processing nucleation processing crystallization W. Höland & G.H. Beall, Glass-ceramic technology. The American Ceramic Society, 2002, and J. Wiley, 2006 W. Höland, Glaskeramik, vdf / UTB, 2006

  4. I. Fundamentals of ceramic technology I designing of glass-ceramics and ceramics controlled nucleation and crystallization relationship between microstructure and properties

  5. II. Dental glass-ceramics as restorative BIOMATERIALS II 1 2 glass-ceramic on a metal framework glass-ceramic as single units (metal-free) 3 glass-ceramic as multi-unit bridge (metal-free)

  6. leucite II 1. Leucite-apatite glass-ceramic powder monolith apatite 2 µm 1 µm 700 °C / 8 h + 1050 °C / 1 h SEM (10 sec, 2.5% HF) 700 °C / 8 h + 1050 °C / 1 h

  7. 2. Opal leucite glass-ceramic II and volume phase separation surface crystallization surface volume 1 µm 20 µm 900 °C/1h SEM ,1.25 %HF, 4s 1020 °C/1h

  8. Processing by molding glaciers long term viscous flow II v i s c o u s f l o w

  9. pressure unit pressing plunger (1.8 - 2.0 MPa) furnace chamber (1075, or 1180 °C) Al2O3 plunger glass-ceramic ingot investment cylinder specimen II 2. Leucite glass-ceramics lost wax technique molding mold IPS Empress®

  10. II 2. Leucite glass-ceramics machinabilty CAD System processing by CAD/CAM: fast increasing technology leucite-type glass-ceramics

  11. 3.a) lithium disilicate and 3.b) apatite glass-ceramic II lithium disilicate gc apatite gc IPS Empress® 2, IPS Eris®

  12. II 3. Lithium disilicate glass-ceramics [1] dental standard ISO 6872

  13. II 3. Lithium disilicate glass-ceramic final product Li2Si2O5 920 °C, pressing crystallinity: 65 Vol.% 5 µm IPS e.max® SEM (3 s, ceramex)

  14. III. Ceramics as biomaterials for dental restoration III 1. ZrO2 2. Fusion of ceramic and apatite glass-ceramic

  15. properties of the final product 1mm Sintramat biocompatible crystallite size ~0.5-0.65mm density ~99.5% flexural strength>900MPa KIC approx. 6 MPa· m1/2 100-400°C approx. 10.5 10-6 K-1m/m SEM

  16. III 2. fusion of ceramic and apatite glass-ceramic apatite glass-ceramic natural dentin 1 µm 1 µm biomimetic process nature as example SEM (3 % HF, 10 s) Glass-ceramic as veneering material

  17. Glass-ceramic and ceramics as biomaterials for dental restoration designing the biomaterials: control the microstructure and to predict special properties based on new technologies high strength, tough, durable materials natural appearance, optical properties close to those of natural tooth processing: molding or machining - effective technologies veneering: sintering with fluoroapatite containing glass-ceramic IV IV. Summary

More Related