Abstract: The invention relates to a cutting block for use in preparing a bone during orthopaedic surgery. The cutting block comprises a bone attachment face, and a front face opposing the bone attachment face. The cutting block further comprises at least a first group of bone pin holes, each hole being configured for removable receipt of a bone pin. The first group of pin holes includes at least two bone pin holes that extend between the bone attachment face and the front face. The at least two bone pin holes extend parallel to each other in an anterior-posterior direction. The at least two bone pin holes are offset from each other in at least one of a superior-inferior direction or a medial-lateral direction. The at least two bone pin holes are interconnected.

Abstract: A surgical kit and method for performing a controlled resection of the neck of a femur during a hip replacement procedure. The kit includes a mounting portion. The mounting portion includes guide holes for inserting guide pins into the femoral head while the mounting portion is located on an anterior aspect of the femoral head. The kit also includes a body portion connected to the mounting portion. The body portion includes an opening for mounting the body portion on an intramedullary pin. The kit also includes a resection guide including guide holes having the same layout as the guide holes of the mounting portion, to allow the resection guide to be mounted on the anterior aspect of the femoral head with the guide pins inserted into the femoral head for positioning a resection plane indicator of the resection guide with respect to the neck of the femur.

Abstract: A method of assembling an orthopaedic surgical instrument may include selecting a surgical reamer for use in resecting a portion of a patient's bone. The method may also include aligning an outer sleeve of a stem trial component with a distal end of a shaft of the surgical reamer. The method may also include advancing the outer sleeve into engagement with the distal end of the reamer shaft. The method may also include advancing a central rod of the stem trial component along a passageway defined in the outer sleeve into engagement with the distal end of the reamer shaft. The method may also include threading the central rod into the distal end of the reamer shaft to couple the stem trial component to the surgical reamer for use in resecting the portion of the patient's bone.

Abstract: A trial liner for use in a hip arthroplasty surgical procedure is disclosed. The trial liner includes a rim and a semi-hemispherical body attached to the rim. The semi-hemispherical body includes a concave inner wall extending inwardly from the rim to define a cavity, a convex outer wall extending from the rim opposite the inner wall, and an interior wall extending between the inner wall and the outer wall and defining an opening at an apex of the semi-hemispherical body. The semi-hemispherical body is adapted to deflect and modify the opening, when pressed against a head of a screw, to accept the head of the screw within the opening. A system that includes the trial liner and the screw, and a method for using the system in a surgical procedure, are also disclosed.

Abstract: An orthopaedic joint replacement system is shown and described. The system includes a number of prosthetic components configured to be implanted into a patient's knee. The system also includes a number of surgical instruments configured for use in preparing the bones of the patient's knee to receive the implants. A method or technique for using the surgical instruments to prepare the bones is also disclosed.

Abstract: A system for use during an orthopaedic surgical procedure includes a femoral broach, an acetabular cup component, and an acetabular alignment guide. The femoral broach includes a mounting post positioned at a superior end of an elongated body. The cup component includes a distal rim and a curved surface extending inwardly from the rim to define a cavity. The alignment guide includes a distal end configured to be coupled to the mounting post and a proximal end configured to be coupled to the distal rim. When coupled to the femoral broach, the guide instrument is sized to orient the acetabular cup component relative to the femoral broach. The acetabular cup component may be a prosthetic cup component or a trial instrument corresponding to the prosthetic cup component.

Abstract: A total knee implant prosthesis is disclosed. The total knee implant prosthesis includes a tibial component including a pair of bearing surfaces and a post positioned between the bearing surfaces, and a femoral component configured to rotate relative to the tibial component. The femoral component includes a pair of condyles sized and shaped to articulate on the bearing surfaces and a cam positioned between the pair of condyles. The cam engages the post at a first contact point when the femoral component is at 0 degrees of flexion and engages the post at a second contact point located lateral of the first contact point when the femoral component is at a first degree of flexion greater than 0 degrees. The cam is disengaged from the post when the femoral component is at a second degree of flexion greater than the first degree of flexion.

Abstract: A surgical instrument system and method of use is disclosed. The system includes a bone fixation pin and a surgical instrument configured for use with the bone fixation pin. The surgical instrument includes a sheath extending over the distal end of an elongated shaft and a locking mechanism operable to permit selectively movement of the elongated shaft along the longitudinal axis relative to the sheath.

Abstract: An orthopaedic components, prostheses, and methods for a hip arthroplasty are disclosed. The acetabular prosthetic component includes an outer rim and a cavity defined by an inner wall. The cavity is sized to receive a femoral head of a femoral prosthetic component. The inner wall includes a curved surface extending inwardly from the outer rim to an inner end, and a semi-spherical surface connected to the inner end of the curved surfac. The inner wall is shaped to resist dislocation of the femoral head component from the cavity and permit the femoral head component to articulate over a range of motion.

Abstract: Kits and methods for use in intraoperative trailing of hip prostheses to determine an appropriate length for the femoral neck component of a prosthetic hip joint, are described. A kit for use in selecting a femoral neck component of an orthopaedic joint prosthesis kit comprises a first (10) and a second (110) broach. Each of the first and second broaches has a neck connection element comprising a projection (12, 112) extending from a proximal surface (14, 114) of the broach, each projection having a length (L). The projection on the first broach has a different length than the projection on the second broach. The kit also includes a trial femoral neck (30) component having a neck connection element in the form of a recess (36) in a distal surface (34).

Abstract: An orthopaedic knee prosthesis includes a tibial bearing and a femoral component configured to articulate with the tibial bearing. The femoral component includes a posterior cam configured to contact a spine of the tibial bearing and a condyle surface curved in the sagittal plane. The radius of curvature of the condyle surface decreases gradually between early-flexion and mid-flexion. Additionally, in some embodiments, the radius of curvature of the condyle surface may be increased during mid-flexion.

Abstract: An orthopaedic surgical instrument for use in disassembling an orthopaedic prosthesis includes a main component, a rod, and a spindle. The main component has a housing and an elongated body extending from the housing with a passageway is defined in the elongated body. The rod has an elongated shaft, with a greater length than the elongated body, extending from the head of the rod and configured to pass through the main component. The spindle threads into the housing to move the rod along a longitudinal axis.

Abstract: An orthopaedic implant includes a patella component having a metal base with a polymer bearing molded thereto. A method for making a patella component is also disclosed.

Abstract: A method of operating a surgical instrument for use in a knee replacement surgical procedure includes assembling a ligament balancer instrument assembly by selecting from a number of differently sized tibial paddles and femoral paddles and thereafter securing the assembled ligament balancer instrument assembly to a distraction instrument.

Abstract: An orthopaedic joint replacement system is shown and described. The system includes a number of prosthetic components configured to be implanted into a patient's knee. The system also includes a number of surgical instruments configured for use in preparing the bones of the patient's knee to receive the implants. A method or technique for using the surgical instruments to prepare the bones is also disclosed.

Abstract: An orthopaedic knee prosthesis includes a femoral component having a condyle surface. The condyle surface is defined by one or more radii of curvatures, which are controlled to reduce or delay the onset of anterior translation of the femoral component relative to a tibial bearing.

Abstract: An orthopaedic prosthesis including a tibial tray is disclosed. The tibial tray includes a distal pocket and a plurality of inner pockets. Each inner pocket includes a channel sized to receive bone cement. The tibial tray includes distal-facing surfaces that have a surface roughness (Ra) equal to about 5.0 microns.

Abstract: An orthopaedic surgical instrument system includes a compression socket configured for coupling with a selected one of a number of compressible bases. Each compressible base is shaped to conform with a posterior surface of either a dome patella implant component or an anatomical patella implant component.

Abstract: An acetabular prosthesis for use in a hip arthroplasty surgical procedure is disclosed. The acetabular prosthesis includes a ceramic acetabular shell liner component configured to be secured to an acetabular shell component. The acetabular prosthesis also includes a metal ring affixed to and encircling the ceramic acetabular shell liner component. The acetabular prosthesis also includes an augment molded to and distally extending from the metal ring. The augment is shaped to modify a range of motion of a femoral prosthetic component when the femoral prosthetic component is fitted into the ceramic acetabular shell liner component. Other embodiments are also disclosed.