Device for a patient-specific acetabulum reaming and cup positioning guide

A device for use in total hip arthroplasty surgery comprising:

• a first guide member comprising:
• a first guide body having a top surface and a bottom surface, the first guide body having a hollow portion,
• a plurality of first guide legs protruding from the body, the plurality of first guide legs including a contact area disposed on the open end of the first guide legs, and
• a plurality of protrusions extending from the body;
• a second guide member configured to be removably coupled with the first guide member comprising:
• a second guide body configured to be received in the hollow portion of the first guide member, and
• a plurality of second guide legs protruding from the second guide body including contact areas disposed on the open end of the second guide legs;
• and
• a third guide member comprising:
• a tube,
• a plate configured to engage with the first guide member, and
• a plurality of holes disposed on the plate configured to receive the plurality of protrusions of the first guide member to couple the first guide member with the third guide member.

A device for use in total hip arthroplasty surgery comprising:

• a first guide member comprising:
• a first guide body having a top surface and a bottom surface, the first guide body having a hollow portion,
• a plurality of first guide legs protruding from the body, the plurality of first guide legs including a contact area disposed on the open end of the first guide legs, and
• a plurality of protrusions extending from the body,
• wherein the first guide member includes a plurality of openings disposed on the first guide body which include circular openings having different angles with respect to the top surface of the ring, and wherein securing members are inserted through the plurality of openings to secure the first guide member to a patient's hip, wherein the securing members are screws;
• a second guide member configured to be removably coupled with the first guide member comprising:
• a second guide body configured to be received in the hollow portion of the first guide member, the second guide body including:
• an arc having an arc of curvature, and
• first and second horizontal brackets connecting ends of the arc and being connected thereto at a termination point, and
• a plurality of second guide legs protruding from the second guide body including contact areas disposed on the open end of the second guide legs;
• a third guide member comprising:
• a tube including at least two projections
• a plate configured to engage with the first guide member,
• a plurality of holes disposed on the plate configured to receive the plurality of protrusions of the first guide member to couple the first guide member with the third guide member, and
• a fourth guide member comprising:
• an extending tube, wherein the extending tube is configured to couple with the tube of the third guide member,
• at least two receiving portions configured to receive the at least two projections from the third guide member to couple the third guide member with the fourth guide member;
• and
• a reamer having a shaft with a reamer head on one end and a stop member disposed on the shaft, the stop member configured to abut the fourth guide member to prevent further movement of the reamer in a direction,
• wherein the second guide is removed prior to coupling the first guide with the third guide.