Abstract: A modular humeral head system includes a housing having an outer surface and an inner surface. A hemispherical socket formed on one end of the inner surface and threads formed on the other end of the inner surface. A cap is attached at the threaded end of the housing. The cap has one or more threaded holes that run from the top surface to bottom surface of the cap. A screw may be inserted in each hole. The modular humeral head system also includes an intermediate piece having a hemispherical head at one end of a tapered shaft. The tapered shaft is inserted in a humeral stem. The hemispherical head and the hemispherical socket form a ball and socket coupling. A trial head may be impacted on the housing. The trial head has one or more holes that are aligned with the screws inserted in the cap. In use, the assembly of the trial head, cap and housing can be adjusted to be in any angular orientation about hemispherical head. The tightening of the one or more screws fixes the angular position of the trial head.

Abstract: A modular humeral head system includes a housing having an outer surface and an inner surface. A hemispherical socket formed on one end of the inner surface and threads formed on the other end of the inner surface. A cap is attached at the threaded end of the housing. The cap has one or more threaded holes that run from the top surface to bottom surface of the cap. A screw may be inserted in each hole. The modular humeral head system also includes an intermediate piece having a hemispherical head at one end of a tapered shaft. The tapered shaft is inserted in a humeral stem. The hemispherical head and the hemispherical socket form a ball and socket coupling. A trial head may be impacted on the housing. The trial head has one or more holes that are aligned with the screws inserted in the cap. In use, the assembly of the trial head, cap and housing can be adjusted to be in any angular orientation about hemispherical head. The tightening of the one or more screws fixes the angular position of the trial head.

Abstract: A device for use in connection with a bone, comprising a first surface and a second surface spaced apart from each other at a predetermined distance and angled relative to each other along a portion thereof. The device having a first ridge projecting from the first surface in a direction away from the second surface, the first ridge extending substantially along a length of the first surface, and a second ridge projecting from the second surface in a direction away from the first surface, the second ridge extending substantially along a length of the second surface in a direction substantially parallel to the first ridge. The device further includes a remote surface positioned more distant from the center of a bone, a proximate surface positioned more near the center of a bone, a fixed end surface, and a removable end surface extending in a first direction.

Abstract: An expandable trial augment, a trial including an augment and a method for using an expandable trial augment are provided. The trial augment is preferably biased to expand in at least one direction.

Abstract: A surgical sagittal saw blade that including a guide bar shaped to be releasably secured in a static position to a complementary surgical sagittal saw. A blade is mounted to the guide bar to pivot around a pivot point. The blade has teeth located outside of the guide bar. Drive rods extend from the blade. The drive rods connect to a complementary driver integral with the saw. When the saw driver is actuated, the drive rods undergo reverse reciprocation. The reciprocation of the driver rods cause the blade to oscillate around a pivot point.

Abstract: A modular humeral head system includes a housing having an outer surface and an inner surface. A hemispherical socket formed on one end of the inner surface and threads formed on the other end of the inner surface. A cap is attached at the threaded end of the housing. The cap has one or more threaded holes that run from the top surface to bottom surface of the cap. A screw may be inserted in each hole. The modular humeral head system also includes an intermediate piece having a hemispherical head at one end of a tapered shaft. The tapered shaft is inserted in a humeral stem. The hemispherical head and the hemispherical socket form a ball and socket coupling. A trial head may be impacted on the housing. The trial head has one or more holes that are aligned with the screws inserted in the cap. In use, the assembly of the trial head, cap and housing can be adjusted to be in any angular orientation about hemispherical head. The tightening of the one or more screws fixes the angular position of the trial head.

Abstract: A surgical sagittal saw including a handpiece from which a planar guide bar extends. A saw blade is mounted to the distal end of the guide bar to move across the guide bar. Drive rods connect the saw blade to a drive assembly in the handpiece, which drive assembly reciprocates the drive rods. The drive rods oscillate the saw blade across the distal end of the guide bar. The saw is used with a cutting guide that is in a fixed position relative to the bone or hard tissue to be cut. A capture element is disposed adjacent the guide surface and holds the guide bar to the guide surface so the cut is made along the desired cut plane.

Abstract: A cutting guide for performing a bone osteotomy procedure is disclosed. The cutting guide includes a first arm having a first cutting guide surface formed therein, a second arm having a second cutting guide surface formed therein pivotably connected to the first arm and a distractor operatively connected to the first arm. The cutting guide is adapted to be affixed to the bone such that the first cutting guide surface is open to the second cutting guide surface. The first arm and second arm are rotatable with respect to each other such that manipulation of the distractor creates a force between the first arm and the second arm causing rotation of the first arm and second arm relative to each other. A method for using the cutting guide in a bone osteotomy procedure is also disclosed.

Abstract: A locking intramedullary alignment jig for use in bone resection, especially for the proximal tibial has an axially extending intramedullary rod for insertion into the medullary canal of the tibia. A slidable anchoring block is mounted on the rod for movement along the rod in the axial direction, which on the tibia is the proximal-distal direction. The anchoring block has a pivot point at one end thereof and a tooth portion at a second end thereof. A first rotating body is pivotally coupled to the pivot point on the anchoring block for rotation about a first axis. The rotating body includes a toothed locking member for releasable locking engagement with the toothed portion the anchoring block. A second rotating body, including a bone resection guide is connected to the first rotating body. Movement of the first and second rotating bodies allow rotation of the resection guide in both the flexion-extension and varus-valgus directions.

Abstract: A bone implantation instrument, punch apparatus and method of forming a recess in a bone are described. The instrument and apparatus include a punch that is extracted from the bone by prying force.

Abstract: A bone cutting guide block has a cutting tool guide surface and a navigation mount for a navigation tracker component for computer aided positioning of the guide for a resection procedure. In various embodiments, the guide includes a rotation means. Preferably, a swivel with a pivot apparatus is provided to limit rotation to permit controlled flexion-extension angle about the pivot with respect to the cutting guide surface. A fixing member through the swivel permits for varus-valgus adjustment of the guide surface. Optionally, a positioning actuator and/or biased resistance actuator implements more regulated flexion-extension angle adjustment with the swivel. Various traversing mechanisms, such as a threaded wheel or pivoted cam tool permit controlled proximal-distal adjustment of the cutting guide surface.

Abstract: A modular humeral head system includes a housing having an outer surface and an inner surface. A hemispherical socket formed on one end of the inner surface and threads formed on the other end of the inner surface. A cap is attached at the threaded end of the housing. The cap has one or more threaded holes that run from the top surface to bottom surface of the cap. A screw may be inserted in each hole. The modular humeral head system also includes an intermediate piece having a hemispherical head at one end of a tapered shaft. The tapered shaft is inserted in a humeral stem. The hemispherical head and the hemispherical socket form a ball and socket coupling. A trial head may be impacted on the housing. The trial head has one or more holes that are aligned with the screws inserted in the cap. In use, the assembly of the trial head, cap and housing can be adjusted to be in any angular orientation about hemispherical head. The tightening of the one or more screws fixes the angular position of the trial head.

Abstract: A tibial alignment guide assembly for positioning a resection guide, the assembly including a main shaft having a proximal end and a distal end. The assembly also includes an anchor arm having an engaging end and a connection end. The connection end is preferably attached to the proximal end of the main shaft and the engaging end preferably has at least one anchor pin extending outwardly therefrom. The at least one anchor pin is adapted to anchor the tibial alignment guide assembly to a tibia plateau in order that the resection guide may be correctly aligned to the tibia. The assembly further includes a lever including an actuation end and a handle. The lever is pivotally connected to the anchor arm, whereby movement of the lever while the actuation end bears against the tibia plateau surface, causes at least a partial extraction of the at least one anchor pin from the tibia plateau.

Abstract: A system for resecting a posterior region of a femoral condyle includes a posterior resection guide having a main body with an upper end and a lower end, a cutting instrument guide surface provided on the main body, and a series of anchor pin holes extending through the main body. The series of anchor pin holes includes a first pair of pin holes located a first distance from the upper end of the main body, a second pair of pin holes located a second distance from the upper end of the main body that is less than the first distance, and a third pair of anchor pin holes located a third distance from the upper end of the main body that is more than the first distance. Anchor pins are insertable through the anchor pin holes for coupling the posterior resection guide with a femoral condyle of a femur.

Abstract: A cutting block for use in a bone osteotomy procedure is disclosed, and includes a first cutting guide surface, a second cutting guide surface, and a third cutting guide surface. The first, second, and third cutting guide surfaces are adapted to be temporarily affixed to a bone having a first side and a second side such that the first cutting guide surface is disposed on the first side of the bone, and such that the second cutting guide surface and third cutting guide surface are disposed on the second side of the bone forming an angle therebetween.

Abstract: A method of balancing extension and flexion gaps in a knee joint includes preparing a tibial component seating surface at a proximal end of a tibia, extending the knee joint and measuring an extension gap between the tibial component seating surface and a distal end of a femur, and flexing the knee joint and measuring a flexion gap between the tibial component seating surface and a posterior region of the femur. The extension gap is compared with the flexion gap to determine an amount of bone that is to be removed from the posterior region of the femur for balancing the extension gap with the flexion gap.

Abstract: A system for forming keel openings in tibial bone includes a plurality of templates having different sizes, each template having a top surface, a bottom surface and a central opening extending between the top and bottom surfaces. The system includes a bone cutting instrument for forming the keel openings and a guide having a leading end that is adapted to be coupled with the templates so that the leading end of the guide is aligned with the central openings in the templates. The guide includes a plurality of slots extending toward the leading end thereof for guiding advancement of the bone cutting instrument through the central openings in the templates. Each slot is associated for use with one of the differently sized templates.

Abstract: A cutting block for use in a bone osteotomy procedure is disclosed, and includes a first cutting guide surface, a second cutting guide surface, and a third cutting guide surface. The first, second, and third cutting guide surfaces are adapted to be temporarily affixed to a bone having a first side and a second side such that the first cutting guide surface is disposed on the first side of the bone, and such that the second cutting guide surface and third cutting guide surface are disposed on the second side of the bone forming an angle therebetween.

Abstract: A cutting block for use in a bone osteotomy procedure is disclosed, and includes a first cutting guide surface, a second cutting guide surface, and a third cutting guide surface. The first, second, and third cutting guide surfaces are adapted to be temporarily affixed to a bone having a first side and a second side such that the first cutting guide surface is disposed on the first side of the bone, and such that the second cutting guide surface and third cutting guide surface are disposed on the second side of the bone forming an angle therebetween.

Abstract: A method of preparing a knee joint for receiving a unicondylar knee implant includes preparing a first seating surface at a proximal end of a tibia, and providing a combination bur template and spacer block, the bur template having an upper end, a lower end and a curved surface extending between the upper and lower ends thereof that is adapted to conform to a femoral condyle of a femur and the spacer block extending from the lower end of the bur template and having top and bottom surfaces. The method includes flexing the knee joint so that the prepared first seating surface at the proximal end of the tibia opposes a posterior region of the femoral condyle and inserting the combination bur template and spacer block into the knee joint so that the top surface of the spacer block engages the posterior region of the femoral condyle and the bottom surface of the spacer block engages the first seating surface at the proximal end of the tibia.