Truly widespread application of ceramics in dental practice (along with major esthetic improvements) awaited two important structural innovations that did not occur until the latter part of this century. The first innovation created today's most often prescribed dental devices, metal-ceramic prostheses (crowns and bridges), enabling dentists to address simultaneously both structural and esthetic problems. Metal-ceramic prostheses are composed of alkali-modified aluminosilicate glasses (feldspathic) layered on thin (0.5 mm to 0.75 mm) castings of palladium-, gold-, or nickel-based alloys. Metal substructures proved crucial to achieving long-term clinical success, especially when ceramics were used to repair posterior teeth or to replace missing teeth. The second structural innovation came in 1965 when McLean and Hughs extended dispersion strengthening to dental ceramics creating the first successful substitute for metal castings. McLean and Hughs utilized alumina as the dispersed phase in a concentration and particle size range that maximized strength and minimized opacity.
American Ceramic Society Bulletin
ceramics, dental, innovation
Dental Ceramic Innovations, American Ceramic Society Bulletin
(Accessed February 21, 2024)