Spinal fusion implant

An implant, comprising:

• a housing;
• a blade having a retracted position in the housing and an extended position where the blade extends outwardly from the housing;
• and
• a blade actuating component, the blade actuating component comprising a driven shaft portion;
• wherein the blade actuating component is configured to move the blade between the retracted position and the extended position;
• the housing including a chamber portion receiving a portion of the driven shaft portion of the blade actuating component;
• and
• the implant further including a blocking element configured to restrict insertion of the blade actuating component by permitting insertion of the blade actuating component when the blade actuating component is subjected to an insertion force exceeding a predetermined threshold force;
• and
• wherein the blocking element includes a blocking pin disposed within an opening in the driven shaft portion of the blade actuating component.

An implant, comprising:

• a housing;
• a blade having a retracted position in the housing and an extended position where the blade extends outwardly from the housing;
• a blade actuating component, the blade actuating component comprising a driven shaft portion;
• wherein the blade actuating component is configured to move the blade between the retracted position and the extended position upon moving the blade actuating component in a first direction;
• the housing including a chamber portion receiving a portion of the driven shaft portion of the blade actuating component;
• the driven shaft portion including an opening and a blocking pin disposed within the opening;
• wherein, in a first position of the blocking pin within the opening, the blocking pin limits insertion of the blade actuating component;
• wherein, in a second position of the blocking pin within the opening, the blade actuating component is unrestricted by the blocking pin;
• wherein the motion of the blade actuating component can be reversed to retract the blade;
• and
• wherein the blocking pin is slidable within the opening from the first position to the second position.