78th MSL Lecture (Prof＆Dr. Wolfram Höland)
| Date/Time | 2018/09/21 3:30 p.m.－5:00 p.m. |
|---|---|
| Place | Lecture Hall, Genso-Cube (S8 building) 1F |
| Organizer | Laboratory for Materials and Structures |
| Contact | Prof. Hideo Hosono (Ext. 5009) |
Subject & Detail
Speaker: Prof＆Dr. Wolfram Höland
（Ivoclar Vivadent Ltd., Liechtenstein）
Title: 40 years of research: development of tailor-made glass-ceramics
Abstract:
Glass-ceramics possess the specialty of enabling the combination of different properties within one material. Therefore, the development of tailor-maid glass-ceramics is possible. This requires to develop different multicomponent chemical parent glass systems and to apply different nucleation and crystallization mechanisms.
The main focus of the lecture is the presentation of twofold or even multifold nucleation and crystallization mechanisms. Combinations of different internal (volume) mechanisms, but also the combination of internal and surface nucleation mechanisms will be explained. Developing different multicomponent parent glasses and applying the multifold nucleation and crystallization mechanisms allows to control the following properties of biomaterials for dental restoration of biomaterials for human medicine:
a) high CTE, translucency and high durability
b) optical properties including translucency as well as opalescence
c) variety of CTE values and high mechanical strength and radiopacity
d) bioactivity and machninability.
But also glass-ceramics for technical applications will be presented. These glass-ceramics are characterized by preferred machinability and magnetism.
The processing technologies to produce the final technical, medical or dental products will be explained as molding, machining or slurry technology with the possibility of rapid prototyping. Final products as dental biomaterials will be presented as dental inlays, onlays, veneers, dental layering materials, dental crowns and dental bridges. In total of all these developed glass-ceramic products: more than 288 Mio single dental glass-ceramic units for patients were fabricated worldwide.
