Implant device for a facet joint and method for fusing the facet joint

An implant device for a facet joint, comprising:

• a wedge portion having a distal wedge end and a proximal wedge end opposite said distal wedge end, said wedge portion having increasing thickness from said distal wedge end to said proximal wedge end;
• an anchor portion being made integral with said wedge portion at said proximal wedge end so as to form a central opening and having a distal anchor end, a proximal anchor end opposite said distal anchor end, a first side anchor end between said distal anchor end and said proximal anchor end, and a second anchor end between said distal anchor end and said proximal anchor end and opposite said first anchor end, said central opening having a D-shape with a curve of the D-shape corresponding to said proximal wedge end,
• wherein said anchor portion and said wedge portion are comprised of a first face extending from said anchor portion to said distal wedge end, a second face opposite said first face extending from said anchor portion to said distal wedge end, and a lateral rim between said first face and said second face, said first face having a length and width greater than a thickness of said lateral rim and said second face having a length and width greater than said thickness of said lateral rim so as to form a rectangular prism portion with said first face on a first longest and widest side of said rectangular prism portion and said second face on a second longest and widest side of said rectangular prism portion opposite said first longest and widest side;
• a plurality of first notches on said first face from said anchor portion to said wedge portion and from said proximal wedge end toward said distal wedge end;
• and
• a plurality of second notches on said second face from said anchor portion to said wedge portion and from said proximal wedge end toward said distal wedge end.