Safety hip femoral bone preparation instruments for the femur in minimally invasive total hip arthroplasty
A safety broach for use in arthroplasty for hip joints, and a system including the same. The system may further include a segmented or otherwise flexible reamer and an implant. The safety broach includes a hollow interior passage that serves to guide the reamer when the safety broach is in place in the bone. The system may include any number of sizes of safety broaches, segmented reamers, and implants. In any case, such a safety broach may be capable of assisting with arthroplasty for hip joints (or any other joint), while typically providing enhanced safety and reliability of the arthroplasty.
1 . A joint replacement system comprising:
a first bone preparation tool comprising:
a first main body having two opposing ends and a hollow interior passage, wherein the main body also has a first opening at a first end and a second opening at a second end, the second opening opposing the first opening of the first main body; and
a plurality of first cutting features formed on the exterior surface of the first main body;
and
a second bone preparation tool comprising:
a second main body having a plurality of cutting features and a plurality of segments,
wherein the hollow interior passage is configured for guiding the second bone preparation tool from the first end to the second end of the first main body, and
wherein the hollow interior passage is configured to allow the second bone preparation tool to exit the second end of the first main body, and
wherein the first bone preparation tool and the second bone preparation tool are configured to be used together.
2 . The joint replacement system of claim 1 , wherein the plurality of segments includes at least three segments.
3 . The joint replacement system of claim 1 , further comprising a flexible attachment made between two segments of the plurality of segments.
4 . The joint replacement system of claim 1 , wherein at least one segment of the plurality of segments is substantially cylindrical in shape.
5 . The joint replacement system of claim 4 , wherein each segment of the plurality of segments is substantially cylindrical in shape.
6 . The joint replacement system of claim 1 , wherein the second bone preparation tool further comprises a stop feature, the stop feature being configured to interfere with the second opening when the second bone preparation tool is inserted through the first opening and extends at least partially through the second opening.
7 . The joint replacement system of claim 1 , wherein the second bone preparation tool further comprises a stop feature, the stop feature being configured to limit the depth that the second bone preparation tool is capable of extending through the second opening.
8 . The joint replacement system of claim 6 , wherein the stop feature is provided at an end of a segment of the second bone preparation tool.
9 . The joint replacement system of claim 7 , wherein the stop feature is provided at an end of a segment of the second bone preparation tool.
10 . The joint replacement system of claim 6 , wherein the stop feature is a plate that has at least one dimension that is greater than at least one dimension of the second opening.
11 . The joint replacement system of claim 7 , wherein the stop feature is a plate that has at least one dimension that is greater than at least one dimension of the second opening.
12 . The joint replacement system of claim 7 , wherein the second bone preparation tool is a reamer.
13 . The joint replacement system of claim 1 , further comprising an implant, wherein the implant, first bone preparation tool, and the second bone preparation tool are configured to be used together.
14 . The joint replacement system of claim 13 , wherein the implant has a first implant portion and a second implant portion, wherein the first bone preparation tool is configured to shape a first cavity in a bone that is the same size and shape as the first implant portion, and wherein the second bone preparation tool is configured to shape a second cavity in a bone that is the same size and shape as the second implant portion.
15 . The joint replacement system of claim 13 , wherein the implant is a portion of an artificial hip.
16 . The joint replacement system of claim 1 , wherein at least a portion of the second bone preparation tool is size and shaped to extend through the second opening.
17 . A bone preparation tool comprising:
a main body having two opposing ends and a hollow interior passage, wherein the main body also has a first opening at a first end and a second opening at a second end, the second end opposing the first end of the hollow interior passage;
a stem portion formed on an exterior surface of the main body and being configured to facilitate manipulation of the main body; and
a plurality of cutting features formed on the exterior surface of the main body,
wherein the hollow interior passage is configured to guide a second bone preparation tool from the first end to the second end, and
wherein the hollow interior passage is configured to allow the second bone preparation tool to exit the second end at the second opening,
wherein the first opening is larger than the second opening.
18 . The bone preparation tool of claim 17 , wherein the stem portion is integrally formed with the main body.