Extra coronal attachment

Details Extra coronal attachment Extra coronal attachment

A - Human Necessities

61

C

83/27

A61C 13/08 (2006.01)

Patent

CA 1159688

BP&N 6650 EXTRA CORONAL ATTACHMENT Abstract of the Disclosure An extra coronal attachment (denture) comprises a cylindrical anchor member formed as part of a crown to be attached to a natural tooth, including a cylindrical anchor surface having a predetermined angular relation to the jaw. A replaceable clip is included in a socket formed in the partial denture, and has a semi-cylindrical cavity construc- ted to fit closely over the anchor surface, having suffi- cient flexibility to be forced onto and off of the anchor surface. The anchor surface preferably is a groove formed in the cylinder, and the clip is proportioned to snap into the groove. Also, the clip is dimensioned so as to allow its side walls to flex during attachment and removal of the denture. The denture, when in place, has essentially stress free or stress isolated connections to the crowns. The clip may be constructed as an integral part of the denture, but preferably is a replaceable piece snapped into a socket integrated into a partial denture. There is also disclosed a process of constructing extra coronal attachments for partial dentures, incorporating the anchor members and clips.

346550

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