Heating a powder below the melting point of any component such as to permit agglomeration and welding of particles by diffusion alone, with or without applied pressure.
Recent developments in CAD CAM dentistry use special partially sintered ceramic (zirconia), glass-bonded ceramic (“Vitablock”) or glass-ceramic (“ips e.max” lithium disilicate) formed into machinable blocks, which are fired again after milling.
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