Abstract: Various methods and devices are provided for bone screw fixation. In one exemplary embodiment, the methods and devices provide a bone fixation device that includes a receiving head having a recess adapted to seat a spinal rod therein and a shank extending distally from the receiving head. An anti-rotation mechanism can be located distal of a distal end of the receiving head and around a proximal portion of the shank, and it can be configured to interact with bone to prevent rotation of at least a portion of the bone fixation device relative to the bone.

Abstract: Disclosed herein are devices for use through a cannula to create cavities within interior body regions. When deployed, the distal end of several such devices extend beyond the distal end of the catheter and can then be selectively curved into a shaped compression surface that, when articulated, creates a void within the interior body. This compression surface may then be withdrawn back into the cannula for removal and to make way for bone cement that, in certain instances, may be introduced through the same cannula.

Abstract: A kit for use in joint arthroplasty that includes a first component of a prosthesis, a second component of the prosthesis, and an assembly tool for assembling the first component to the second component. The tool includes a housing for contact with the first component and an internal component connected to the second component. The internal component includes an actuating device and an actuator rod. The actuating device has at least one scissor arm. The housing and the internal component are adapted to provide for the assembly of the first component of the prosthesis to the second component of the prosthesis.

Abstract: A posterior stabilized knee orthopaedic prosthesis assembly includes a tibial bearing, a primary femoral component, and a revision femoral component. Each of the primary and revision femoral components is configured to separately articulate with the tibial bearing. However, each of the primary and revision femoral components has different geometry. The primary femoral component includes a posterior cam having a posterior cam surfacing including a concave cam surface and a convex cam surface. The revision femoral component includes a posterior cam having only a convex cam surface.

Abstract: A surgical cutting guide (8) is described which comprises a body section delimiting a recess (14) extending into the body section from an external surface. The recess has a central axis and is for receiving an attachment protrusion (18) from a surgical alignment guide (6). The recess comprises: a first portion (36) having a first constant cross section along the central axis; and a second portion (38) having a second constant cross section along the central axis which is larger than the first constant cross section. The first and second portions are coaxial with the central axis and the second portion is closer to the external surface than the first portion. This configuration creates a stepped surface in the recess which is engaged by corresponding features on a protrusion of a surgical alignment guide.

Abstract: A surgical apparatus having a locking mechanism that receives a cutting burr and that may include a loading and running position. The locking mechanism may include a motor driven spindle that carries a locking pawl and a detent pawl that lock the cutting burr in place an prevent the cutting burr from inadvertently falling out of the surgical drill instrument when in its load position. A diamond-shaped portion of the cutting burr may be formed in a six-sided diamond configuration and a perpendicular back end surface. The end of the cutting burr may include another diamond-shaped portion formed in a six-sided diamond shape surface that mates with a complementary surface formed in the receiving end of the spindle of the motor/locking mechanism. In an aspect, the attachment of the cutting burr is such that the cutting burr has substantially zero axial movement and runs true in the running condition.

Abstract: A bone screw is provided having first and second threaded portions of different diameter separated by a middle portion that is unthreaded so that the bone screw may be inserted into a pair of adjacent bone fragments and used to compress the fragments together by driving the screw into a hole drilled in the fragments. An installation tool is also disclosed for threadably engaging one end of the bone screw and is used to initially drive the screw into the bone hole. Thereafter, a screwdriver may be inserted through the tool and into engagement with a recess in the bone screw and may be used to drive the screw fully into the bone and to separate the bone screw from the installation tool. A method of installation is further provided.

Abstract: An orthopaedic surgical instrument assembly includes an instrument handle configured to clamp a broach and femoral stem trial assembly. A depth stop is configured to removably couple to the instrument handle. When the broach and femoral stem trial are advanced into a medullary canal of a patient's femur, a substantially planar proximal surface of the depth stop is configured to engage the distal surface of the femur, determining the depth of the broach in the medullary canal. The proximal surface of the depth stop is parallel to the joint line, defining an oblique angle to the anatomical axis of the femur. The depth stop may be attached to the instrument handle at a number of positions to control the depth of the broach. The assembly may include a spacer plate removably coupled to the depth stop that distalizes the broach in the medullary canal.

Abstract: A bone fixation system that may be configured to move at least one of a first bone segment and a second bone segment relative to the other, is disclosed. The system may include a first lever and a second lever pivotally coupled to the first lever. The first lever may include a first handle, a first jaw extending from the first handle, and an aperture extending through the first jaw. The aperture may be configured to receive a fixation element to thereby fixedly couple the first lever to a bone plate. The second lever may include a second handle, a second jaw extending from the second handle, and an aperture extending through the second jaw. The aperture may be configured to receive a temporary fixation element to operatively couple the second lever to the second bone segment.

Abstract: A porous containment device for implanting into the interior volume of a targeted vertebral body for use in restoring the anatomy of the targeted vertebral body. The porous containment device is expandable from an insertion configuration to an expanded configuration via, for example, a bone filler material. The porous containment device includes an enlarged proximal portion, an enlarged distal portion, and a narrower central portion located between the enlarged proximal and distal portions. The porous containment device includes at least one pore positioned between a midline of the narrower central portion and walls of the enlarged distal and proximal portions. The porous containment device may include one or more air or fluid evacuation pores to permit air or fluid to escape and internal or external constraints to form the narrower central portion. In addition, a cannulated sleeve may be used to insert the porous containment device.

Abstract: A method of surgically preparing a proximal end of a tibia includes inserting an intramedullary orthopaedic surgical instrument into a medullary canal of the tibia, securing an attachment device to the intramedullary orthopaedic surgical instrument, attaching a cutting block to the attachment device, resecting the proximal end of the tibia using the cutting block to form a surgically-prepared surface, positioning a tibial base trial on the surgically-prepared surface, and inserting a keel punch through a slot defined in the tibial base trial and into the surgically-prepared surface of the tibia.

Abstract: A surgical instrument alignment guide comprising a mount (2) arranged to be coupled to a bone of a patient, an alignment rod (4), a guide rod (24) and an indicator (26). The alignment rod (4) has a first end pivotally coupled to the mount (2) such that the inclination of the alignment rod (4) relative to the mount (2) is adjustable. The guide rod (24) is couplable to a second end of the alignment rod (4) at an adjustable angle and orientation such that the guide rod (24) can extend transverse to the alignment rod (4). The indicator (26) is coupled to the guide rod (24) to indicate when the guide rod (24) lies at a desired angle relative to a horizontal axis. Also disclosed is a method of aligning a surgical instrument using the surgical instrument alignment guide.

Abstract: An implantable valve system and method of using same, including a housing with a resilient membrane defining a reservoir in fluid communication with at least two ports, and at least a first set of opposing sealing features disposed on upper and lower surfaces within the housing. The membrane is capable of being depressed by a human finger to bring the sealing features together to substantially restrict fluid from passing through at least one of one of the ports, and is capable of being depressed additionally by a rolling motion of the finger to drive fluid through the other of the ports.

Abstract: An orthopedic surgical instrument including a femoral trial component configured to be coupled to a surgically-prepared distal end of a patient's femur. The femoral trial component has a fixation side configured to engage a posterior aspect of the surgically-prepared distal femur.

Abstract: A surgical instrument has first and second components that can rotate relative to one another and a locking mechanism to selectively restrict or allow rotation between the first and second components. One component has a first array of two or more grooves or teeth spaced apart at a first angular pitch and at least one further groove or further tooth which does not correspond to the first angular pitch. The other component comprises a first tooth or a first groove to engage one of the first array of grooves or teeth to selectively restrict rotation to two or more predetermined rotational positions; the other component also selectively engages the at least one further groove or further tooth on the first component to selectively restrict rotation between the first and second components at a 0° rotational position.

Abstract: A shoulder prosthesis kit includes a first metaglene component including (i) a first body defining an outer diameter, (ii) a first augment extending medially from the first body, and (iii) a first void defined by a portion of the first body and a portion of the first augment, and a plurality of bearing components, each of the plurality of bearing components defining a cavity configured to couple with the first body, and having a bearing surface that is sized differently from the size of another of the plurality of bearing components.

Abstract: Methods, pharmaceutical compositions and kits for regenerating or repairing neural tissue, decreasing apoptosis and improving neurological function following injury using human umbilical cord tissue-derived cells are disclosed.

Abstract: A graft anchor has first and second arms each having a leading end, a trailing end, an inner surface, and an outer bone contactable surface. The graft anchor also has a resilient bridge extending between the inner surface of the first arm and the inner surface of the second arm to space apart the first arm and the second arm. The resilient bridge defines a graft receiving pathway between the inner surfaces of the first and second arms. The resilient bridge also defines a deflection point about which a force acting upon the resilient bridge in a direction from the leading end to the trailing end causes the leading ends of the first and second arms to move toward one another and the trailing ends of the first and second arms to move away from one another.

Abstract: A bone plate is configured for pancarpal arthrodesis. The bone plate can include a plurality of apertures that can be aligned with the metacarpal bones. The apertures can include a first portion and second portion that is longitudinally and laterally offset with respect to the first portion.

Abstract: A method for retraction useable in joint arthroplasty. The method includes using a joint retractor having a first arm and a second arm. The first arm has a first portion and a second portion and the second arm having a first portion and a second portion. The retractor is inserted into a surgical opening of a patient's shoulder joint. The second portion of the first arm is placed against the coracoid process and the second portion of the second arm is placed against the resected humerus. The first portions of the first and second arms are hung over the resected tissue to allow exposure of the glenoid.