Connection of a prosthesis structure with an implant structure

A connection device (3:

• 37) for connecting a prosthesis structure with an implant structure or capped tooth, both having a head suitable for a snap engagement connection, said connection device comprising;
• a holding shell (2;
• 27) and a retention insert (1, 17;
• 18;
• 19),
• wherein said retention insert (1;
• 17;
• 18;
• 19) has an end side (12;
• 127;
• 128;
• 129) and a substantially ring shaped retention rim (11;
• 117;
• 118;
• 119) projecting therefrom;
• wherein said holding shell (2;
• 27) has an end side (22;
• 227) and a substantially ring shaped holding rim (21;
• 217) projecting therefrom;
• wherein said holding rim (21;
• 217) and said end side (22;
• 227) of said holding shell (2;
• 27) form a retainer in which said retention insert (1;
• 17;
• 18;
• 19) can be arranged such that an outer surface (114;
• 1147;
• 1148;
• 1149) of said retention rim (11;
• 117;
• 118;
• 119) of said retention insert (1;
• 17;
• 18;
• 19) is adjacent to an inner surface (212;
• 2127) of said holding rim (21;
• 217) of said holding shell (2;
• 27);
• wherein said retention rim (11;
• 117;
• 118;
• 119) of said retention insert (1;
• 17;
• 18;
• 19) has a projection (13;
• 137;
• 138;
• 139) projecting radially from said outer surface (114;
• 1147;
• 1148;
• 1149) of said retention rim (11;
• 117;
• 118;
• 119) of said retention insert (1;
• 17;
• 18;
• 19) and said holding rim (21;
• 217) of said holding shell (2;
• 27) comprises a corresponding groove (23;
• 237) extending radially from said inner surface (212;
• 2127) of said holding rim (21;
• 217) of said holding shell (2;
• 27);
• wherein said projection (13;
• 137;
• 138;
• 139) of said retention rim (11;
• 117;
• 118;
• 119) of said retention insert (1;
• 17;
• 18;
• 19) is arrangeable in said groove (23;
• 237) of said holding rim (21;
• 217) of said holding shell (2;
• 27) and said outer surface (114;
• 1147;
• 1148;
• 1149) of said retention rim (11;
• 117;
• 118;
• 119) of said retention insert (1;
• 17;
• 18;
• 19) is at least partly spaced from and adjacent to said inner surface (212;
• 2127) of said holding rim (21;
• 217) of said holding shell (21;
• 217), such that said retention insert (1;
• 17;
• 18;
• 19) is releasably held in said retainer of said holding shell (2;
• 27), defining a first position where said head is not inserted in the retention insert and the retention insert is removable from said holding shell;
• and
• wherein said retention insert (1;
• 17;
• 18;
• 19) is radially expandable by a radial force acting on said retention rim (11;
• 117;
• 118;
• 119) in the direction of said holding rim (21;
• 217) of said holding shell (2;
• 27) by insertion of said head into said retention insert, defining a second position, wherein in said second position, said projection of said retention rim of said retention insert is moved further into and in the direction of said groove of said holding rim of said holding shell and spacing between said retention rim of said retention insert and said inner surface of said holding rim of said holding shell is reduced, and the retention insert is firmly held in and is not removable from said holding shell.