Extra coronal attachment

Details Extra coronal attachment Extra coronal attachment

1978-06-29

1981-03-31

Peshock, Robert

Dentistry

Prosthodontics

Holding or positioning denture in mouth

433219, 433183, A61C 0000

Patent

active

042590736

ABSTRACT:
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 constructed to fit closely over the anchor surface, having sufficient 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.

REFERENCES:
patent: 1140537 (1915-05-01), Skinner
patent: 2609605 (1952-09-01), Dillon
patent: 3535787 (1970-10-01), Korfe

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