Offset trial stem

An offset trial stem system, comprising:

• a baseplate;
• a trial stem having a main body portion including a first opening and a baseplate connection portion including a second opening, the baseplate connection portion being threadably attached to the baseplate, and being offset from, and connected to, the main body portion by a transition portion;
• and
• a threaded member for attaching the trial stem to the baseplate, the threaded member being mounted for rotating movement in the trial stem and having a first portion in the first opening and a second portion in the second opening, whereby the first portion is movable reciprocally and rotatable to reciprocate and rotate the second portion.

An offset trial stem system comprising:

• a baseplate, including a stem receiving recess formed therein, the recess being keyed for receiving a trial stem in one of a first position and a second position;
• the trial stem having a main body portion and a baseplate connection portion and an elongated cavity extending through the baseplate connection portion and into the main body portion;
• the baseplate connection portion being keyed to engage the stem receiving recess in one of the first position and the second position;
• first means for transitioning the baseplate connection portion to be offset from, and connected to, the main body portion;
• and
• second means for threadably attaching the baseplate connection portion to the stem receiving recess, the second means being mounted inside the cavity for rotating movement in the trial stem.

A method of mounting an offset trial stem system, comprising the steps of:

• forming a canal in a tibia by removing cancellous bone;
• attaching a baseplate to a trial stem having a baseplate connection portion offset from a main body portion by a transition portion, wherein a bore extends through the baseplate connection portion and into the main body portion;
• and
• rotating a threaded member mounted inside the bore of the baseplate connection portion and main body portion to threadably attach to the baseplate.

An offset trial stem connectable to a baseplate, the trial stem comprising:

• a main body portion having a first centroidal axis;
• a baseplate connection portion having a second centroidal axis and being offset from and connected to the main body portion, wherein first and second centroidal axes are parallel and pass through the main body portion;
• and
• a threaded member adapted to attach the main body portion and baseplate connection portion to a baseplate, the threaded member being mounted for rotating movement in the main body and baseplate connection portions.

An offset trial stem system comprising:

• a baseplate, including a stem receiving recess formed therein, the recess being keyed for receiving a trial stem in one of a first position and a second position;
• the trial stem having a main body portion with a first opening and a baseplate connection portion with a second opening;
• the baseplate connection portion being keyed to engage the stem receiving recess in one of the first position and the second position;
• first means for transitioning the baseplate connection portion to be offset from, and connected to, the main body portion;
• and
• second means for threadably attaching the baseplate connection portion to the stem receiving recess, the second means being mounted for rotating movement in the trial stem and having a first portion in the first opening and a second portion in the second opening, wherein the first portion is movable reciprocally and rotatably to reciprocate and rotate the second portion into the stem receiving recess.