clasp

clasp

1. A part of a removable partial denture that acts as a direct retainer and/or stabilizer for the denture by partially surrounding or contacting an abutment tooth. 2. A direct retainer of a removable partial denture, usually consisting of two arms joined by a body which connects with an occlusal rest; at least one arm of a clasp usually terminates in the infrabulge (gingival convergence) area of the tooth enclosed.
bar c. 1. a c. whose arms are bar-type extensions from major connectors or from within the denture base; the arms pass adjacent to the soft tissues and approach the point of contact on the tooth in a gingivo-occlusal direction; 2. a c. consisting of two or more separate arms located opposite to each other on the tooth; the bar arms arise from the framework or from a connector and may traverse the soft tissue; one arm (bar), the retentive arm, usually terminates in the infrabulge (gingival convergence) area of the tooth; the other, the reciprocal arm, usually terminates on the suprabulge (occlusal convergence) area.Roach c;
circumferential c. 1. a c. that encircles more than 180° of a tooth, including opposite angles, and which usually contacts the tooth throughout the extent of the c., at least one terminal being in the infrabulge (gingival convergence) area; 2. a c. consisting of two circumferential c. arms, both of which originate from the same minor connector and are located on opposite surfaces of the abutment tooth.
continuous c. continuous bar retainer
extended c. a c. that extends from its minor connector along the lingual and/or facial surface of two or more teeth.
Roach c. bar c

 

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