Category: R

Slender woven or twisted string‐like fabric (usually cotton or similar material) used to retract gingival or mucosal tissues for the exposure of prepared tooth or abutment margins prior to impression making. It is usually impregnated with an appropriate substance to stiffen the cord and provide vasoconstriction.  

Repair of the damaged internal threads of a root‐form dental implant using a tap instrument.  

Portion of a prosthetic component that is the cylinder‐to‐implant position, directly in contact with the implant.  

An obsolete term that refers to denture retention obtained by utilizing bony undercuts covered with tissue.  

The feature of a tooth preparation that resists dislodgment of a crown in a vertical direction or along the path of placement.  

Extension of metal or plastic arm to add stability to a dental prosthesis.  

Capacity of a prosthesis or dental restoration to maintain its intended position in function. For a removable prosthesis, the resistance to displacement in the designed path of insertion. The amounts of previously learned material that are remembered. The act of not letting out something, especially a fluid, which is usually released from the body, e.g.…

A threaded fastener that secures a prosthetic reconstruction to an abutment or a mesostructure.  

Impression coping fixed intraorally either through frictional fit or by being screwed into position. Immediately after removal of the impression, it remains intraorally.