The female part for forming a releasable connection to amale part (50) that is configured to be fastened in themouth comprises a housing (20), which is configured to befastened to a dental prosthesis, an insert (1), which isinsertable into the housing and rotatable with respect tothe housing and in which a portion (51) of the male part canbe accommodated, and adjusting means that are formed on thehousing and on the insert and that cause a change in thediameter of the insert when the insert is rotated withrespect to the housing. At least one protrusion (5b, 5c) andat least one recess are provided to form the adjustingmeans. The female part has locking means, which are formedin the housing and on the insert for defining discretelyarranged locking positions, wherein the insert is compressedmore in at least one locking position than in at least oneother locking position.
