From Walter Wright's 1937 substitution of PMMA for vulcanite — to porosity, crazing, warpage, and the milled CAD-CAM pucks now displacing the flask
BDS · Dental Materials · TOPIC DM-07 Denture Base Resins, Acrylics & Polymers From Walter Wright's 1937 substitution of PMMA for vulcanite — to porosity, crazing, warpage, and the milled CAD-CAM pucks now displacing the flask Before 1937 , denture bases were vulcanite (vulcanised rubber, Charles Goodyear) — odorous, porous, and stained by tobacco. Walter Wright introduced poly(methyl methacrylate) — PMMA — to dentistry that year, and within a decade it had displaced every competing material. Nearly a century later, PMMA still accounts for more than 95% of denture bases …
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