Interlockable two-piece impression coping for anatomical dental abutment restorative systems

An impression coping attachable to a dental component of an anatomical dental abutment restorative system for making an impression, which dental component has a distal end with a polygonal interface and a threaded hollow, the impression coping comprising:

• a. an elongated bolt member having a proximal end, a widened distal end and a threaded section adjacent to the proximal end engagable with said threaded hollow at said distal end of said dental component;
• b. a generally cylindrical shaped coping member having a proximal end, a distal end, an interior bore extending from the distal end to the proximal end, and an exterior sidewall;
• c. said proximal end of said coping member having a complementary polygonal interface engagable with said polygonal interface at said distal end of said dental component for preventing said coping member from rotating about said dental component;
• d. said exterior sidewall of said coping member having at least one flattened surface for preventing said impression from rotating about said coping member;
• e. most of said interior bore of said coping member being smooth but having a threaded section engagable with said threaded section of said bolt member;
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• f. said threaded section of said coping member and said threaded section of said bolt member being offset, such that when said complementary polygonal interface at said proximal end of said coping member is fully engaged with said polygonal interface at said distal end of said dental component, said threaded section of said bolt member will not be threadably engaged with said threaded section of said interior bore of said coping member and said threaded hollow of said dental component simultaneously;
• g. whereby said coping member and said bolt member are threadably interlocked before said bolt member is threadably engaged with said dental component, but are not threadably engaged when said bolt member is threadably engaged with said dental component, such that the polygonal connection between said coping member and said dental component is not jeopardized.

An impression coping attachable to a dental fixture for making an impression, which fixture is implanted into a patient's jawbone and has an exposed end with a hexagonal interface and a hollow portion with inner screw threads, the impression coping comprising:

• a. a bolt member having a head part and an elongated shaft part, the shaft part having a proximal end and a distal end, and the head part integrally connected to the distal end of the shaft part;
• b. said shaft part of said bolt member having a proximal section and a distal section, the proximal section having outer screw threads compatible with said inner screw threads of said hollow portion of said implant fixture;
• c. a generally frusto-conical shaped coping member having a large proximal end, a small distal end, a stepped interior bore extending from the distal end of the coping member to the proximal end of the coping member and an exterior sidewall;
• d. said proximal end of said coping member having a complementary hexagonal interface engagable with said hexagonal interface at said exposed end of said implant fixture for preventing said coping member from rotating about said implant fixture;
• e. said exterior sidewall of said coping member having a multiplicity of flattened inclined surfaces for preventing said impression from rotating about said coping member;
• f. said interior bore of said coping member having a wide proximal section and a narrow distal section, the proximal section of the bore being smooth, and the distal section of the bore having inner screw threads compatible with said outer screw threads of said proximal section of said shaft part of said bolt member;
• g. said coping member and said bolt member being interlockable by threading said proximal section of said shaft part of said bolt member into said distal section of said interior bore of said coping member;
• h. said distal section of said shaft part of said bolt member being longer than said distal section of said interior bore of said coping member, such that after said proximal section of said shaft part of said bolt member is completely threaded through said distal section of said interior bore of said coping member from said distal end of said coping member, said coping member and said bolt member are not threadably engaged;
• i. said proximal section of said interior bore of said coping member being wider than said proximal section of said shaft part of said bolt member, such that when said proximal section of said shaft part of said bolt member is located within said proximal section of said interior bore of said coping member, said proximal section of said interior bore of said coping member is completely disengaged from said proximal section of said shaft part of said bolt member;
• j. said proximal section of said interior bore of said coping member being longer than said proximal section of said shaft part of said bolt member, such that when said complementary hexagonal interface at said proximal end of said coping member is fully engaged with said hexagonal interface at said exposed end of said implant fixture, said proximal section of said shaft part of said bolt member cannot be threadably engaged with said proximal section of said interior bore of said coping member and said hollow portion of said implant fixture simultaneously;
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• k. said shaft part of said bolt member being longer than said coping member, such that after said shaft part of said bolt member extends through said interior bore of said coping member from said distal end of said coping member, there is still a substantial portion of said proximal section of said shaft part of said bolt member which can be threadably engaged with said hollow portion of said implant fixture for fastening said coping member to said exposed end of said implant fixture;
• l. whereby said coping member and said bolt member are threadably interlocked before said bolt member is threadably engaged with said implant fixture, but are not threadably engaged when said bolt member is threadably engaged with said implant fixture, such that the hexagonal connection between said coping member and said implant fixture is not jeopardized.

A method of attaching an impression coping to a dental fixture implanted in a patient's jawbone for making an impression, which fixture has a hexagonal interface and a threaded hollow, the method comprising the steps of:

• a. utilizing an elongated bolt member which has a threaded proximal section engagable with said threaded hollow of said implant fixture and a smooth distal section;
• b. utilizing a generally frusto-conical shaped coping member which has a stepped interior bore including a smooth and widened proximal section and a threaded distal section, a complementary hexagonal interface engagable with said hexagonal interface of said dental component for preventing the coping member from rotating about said dental component, and at least one flattened exterior surface for preventing said impression from rotating about the coping member;
• c. interlocking said coping member and said bolt member by threading said proximal section of said bolt member into said distal section of said interior bore of said coping member;
• d. attaching said coping member with said interlocked bolt member onto said implant fixture by fully engaging said complementary hexagonal interface of said coping member with said hexagonal interface of said implant fixture;
• and
• e. fastening said coping member to said implant fixture by threading said bolt member until its threaded proximal section is completely disengaged with said threaded distal section of said coping member, and instead engaged with said threaded hollow of said implant fixture;
• f. whereby said coping member and said bolt member are threadably interlocked before said bolt member is threadably engaged with said implant fixture, but are not threadably engaged when said bolt member is threadably engaged with said implant fixture, such that the hexagonal interface between said coping member and said implant fixture is not jeopardized.

A method of attaching an impression coping to a dental component of an anatomical dental abutment restorative system for making an impression, which dental component has a threaded hollow and means for preventing the relative rotation between the coping and the dental component, the method comprising the steps of:

• a. utilizing a bolt member which has a threaded section engagable with said threaded hollow of said dental component;
• b. utilizing a coping member which has an interior bore including a threaded section offset from said threaded section of said bolt member, means engagable with said rotation preventing means of said dental component for preventing said coping member from rotating about said dental component, and means for preventing said impression from turning about said coping member;
• c. interlocking said coping member and said bolt member by threading said threaded section of said bolt member into said threaded section of said interior bore of said coping member;
• d. attaching said coping member with said interlocked bolt member onto said dental component by fully engaging said respective rotation preventing means;
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• e. fastening said coping member to said dental component by threading said bolt member until its threaded section is completely disengaged with said threaded section of said coping member, and instead engaged with said threaded hollow of said dental component;
• f. whereby said coping member and said bolt member are threadably interlocked before said bolt member is threadably engaged with said dental component, but are not threadably engaged when said bolt member is threadably engaged with said dental component, such that the rotation preventing connection between said coping member and said implant fixture is not jeopardized.