Coupling for a multi-part dental implant system

A dental implant system comprising a dental implant, an abutment and a threaded screw, the abutment being provided with a guiding and lock means for associating the abutment to the dental implant, the guiding and lock means comprising:

• a first conically tapered section;
• and
• a second non-tapered section arranged apically adjacent to the first section, the second section being provided with an anti-rotational means including at least one protrusion extending radially with respect to the axis of the abutment and adapted to cooperate with the dental implant so as to provide rotational guidance to the abutment upon insertion thereof into the implant, and
• the dental implant being provided with a complementary guiding and lock means comprising:
• a first conically tapered section;
• and
• a second section being provided with an annular platform extending radially with respect to the axis of the dental implant and interposed between grooves, said annular platform being adapted to cooperate with the abutment so as to provide rotational guidance to the abutment upon insertion thereof into the implant,
• wherein the dental implant further comprises a threaded section arranged apically to the second section and the abutment is adapted to axially hold the threaded screw for fastening the abutment to the dental implant,
• wherein the overall axial length of the first and second sections of the abutment, the length of the threaded screw and the position of the threaded screw within the abutment are selected such that threaded engagement of the threaded screw to the dental implant is not possible when the at least one protrusion is held in an intermediate position on the annular platform of the implant, wherein the intermediate position is a position where the longitudinal axes of the guiding and lock means of the abutment and of the implant are coaxial with one another.