Production manner of denture attachment and containment board null for denture attachment

摘要

PURPOSE:To surely fix a holding plate at the preset position in a die, eliminate a drift between a metal cap and a holding plate, and secure them with an excellent suction force by providing a handle on the holding plate when the holding plate is cast to the metal cap. CONSTITUTION:The spacer 13 of a denture attachment 1 is made of a corrosion- proof nonmagnetic alloy and arranged at the center on the metal cap side of a magnetic substance 10, and a pair of yokes 11 made of a corrosion-proof soft magnetic alloy are erected toward the metal cap 93 on both sides to pinch the spacer 13. A magnet 12 is inserted between the yokes 11 and arranged on the spacer 13. A cap 14 is made of a corrosion-proof nonmagnetic alloy, the spacer 13, yokes 11, 11 and magnet 12 are combined into an integrated body, which is covered on the whole periphery except the lower face faced to the metal cap 93. When the holding plate 96 is to be stuck on the magnetic substance side of the metal cap 93 by casting, the holding plate 96 with a handle 97 is fixed at the preset position of a metal cap-shaped wax pattern, and the surrounding is fixed with a backup casting material to mold a die 98. The wax pattern is removed, then melted metal is filled through a pouring gate 99 to cast the metal cap 93, and the holding plate 97 is cast.