Abstract: A locking surgical tool handle system. The invention includes a surgical tool handle that has an elongated body portion with a pistol-type grip. The front end of the handle body has a tool retaining structure comprising a contoured engagement face and a moveable tension bar with an engagement end. Projections on the engagement end of the tension bar fit within a receiving channel of a surgical tool, such as a broach or rasp. A locking mechanism is provided within the handle body, and is implemented with pivotable links attached to the tension bar. The locking mechanism has an unlocked position in which the engagement end of the tension bar is spaced away from the engagement face of the handle body, and an over-center locked position in which the engagement end of the tension bar is retracted toward the handle body. When the tool handle is placed in its locked position, the engagement end of the tension bar pulls an attached tool into tight contact with the engagement face of the handle body.

Abstract: A locking surgical tool handle system. The invention includes a surgical tool handle that has an elongated body portion with a pistol-type grip. The front end of the handle body has a tool retaining structure comprising a contoured engagement face and a movable tension bar with an engagement end. Projections on the engagement end of the tension bar fit within a receiving channel of a surgical tool, such as a broach or rasp. A locking mechanism is provided within the handle body, and is implemented with pivotable links attached to the tension bar. The locking mechanism has an unlocked position in which the engagement end of the tension bar is spaced away from the engagement face of the handle body, and an over-center locked position in which the engagement end of the tension bar is retracted toward the handle body. When the tool handle is placed in its locked position, the engagement end of the tension bar pulls an attached tool into tight contact with the engagement face of the handle body.

Abstract: There is disclosed a surgical instrument for use in preparing a bone cavity for the subsequent implantation of a joint replacement prosthesis, and especially for the enlargement of a medullary cavity of a femur prior to the implantation of a femoral component of a hip prosthesis. The instrument comprises a shank (2) having serrations (4) on at least a part of its outer surface and a handle (3) mounted at one end of the shank, in which the shank is divided into a main body member (5) and at least one sliding member (6) which is engageable with the main body member in such a way as to allow relative sliding motion between the sliding member and the main body member during use of the instrument, so that the serrations can shape the interior surface of the bone cavity.

Abstract: The bone prosthesis of the present invention comprises a first body member or stem for placement into a bone cavity, such as an intramedullary canal. The body member is configured and dimensioned so as to provide a nonuniform interference press-fit. The apparatus further comprises a second body member or broach for placement into and removal from a bone cavity, the broach configured and dimensioned so as to prepare the bone cavity so as to provide a nonuniform interference press-fit with the stem. The apparatus further comprises a distal sleeve configured and dimensioned so as to be attached to the stem so as to centralize the stem in the bone cavity. The distal sleeve preferably is provided with an interior conical slope and an exterior conical slope on a portion thereof to aid in insertion into the canal. The stem further comprises at least one groove and preferably a plurality of grooves along its corners.

Abstract: A method and apparatus for performing arcuate osteotomies wherein a wedge-shaped correction is filed rather than sawed from the bone. A combined saw and file for use in the method has a curved blade with teeth along a longitudinal edge for making an arcuate cut in the direction perpendicular to the edge, and file teeth on one or both of its curved faces for filing out the correction. The effective width of the the blade determines the tip width of the correction; the thickness of the blade determines the width of the arcuate kerf; and the radius of curvature of the blade determines the radius of the arcuate cut. Also disclosed is cutting guide for guiding a saw/file or other cutting implement to make the arcuate cut and the correction.

Abstract: The present invention provides a modular hip prosthesis, and instrumentation for implanting the same, which has provision for varying the angulation between the stem portion and the trochanteral module portion by provision of connection means between the neck and stem which can be positioned or attached together in a variety of rotational positions. Variation of the angulation or anteversion is made possible in accordance with the present invention by virtue of the fact that the axis of the connection portion of the stem and neck is angularly offset from the axis of the body of the stem and neck, respectively. A further aspect of this invention is the provision of instrumention for formation of a cavity for implantation of a prosthesis of this invention which is provided with indication means for indicating to the surgeon the optimum angle for assembly of the prosthesis of invention for implantation into a particular proximal femur.

Abstract: A method of making a femoral rasp wherein the hip stem implant is used to make a two part mold. The mold halves are separated and the implant removed to yield left and right mold halves representing corresponding halves of the hip stem. The cavities of the mold halves are lined with wax and a plurality of blades are imbedded into the wax such that an anchor portion of each of the blades remains exposed. The mold halves are connected together and a stem of handle is inserted therein. A moldable material such as PMMA is poured into the mold and allowed to cure. When the PMMA is hard or cured, the mold halves are separated and the wax is removed from the rasp body exposing the cutting surfaces of the teeth.

Abstract: A rasp tool including a handle member, a cutter member, and a releasable locking mechanism for selectively coupling the handle and cutter members. The locking mechanism includes a locking post on the cutter member and a corresponding post-receiving bore in the handle member. A spring-biased locking key is disposed within a guide bore that intersects the post-receiving bore such that the locking key extends partially into the post-receiving bore. As the locking post is axially introduced into the post-receiving bore, the locking post contacts the locking key and causes it to retract until the locking post is fully received within the bore, at which point the spring-biased locking key engages a transverse notch in the locking post, thereby preventing axial removal of the post from the bore. The locking key is disengaged from the locking post by a manually-actuable trigger coupled to the locking key.

Abstract: A procedure for contouring the wall of a femoral cavity in a femur for the reception of a femoral stem to be seated within the femoral cavity employs a femoral broach which includes cutting teeth aligned along peripherally spaced apart longitudinal rows extending along a portion of the outer surface of the blade of the broach for forming a multiplicity of alternating longitudinally extending generally parallel grooves and ribs in the wall of the cavity, at least some of the grooves being contiguous with harder portions of the bone of the femur while the ribs are comprised of softer portions of the bone so that completion of the contouring will be signalled by bottoming of the blade of the broach upon the harder portions of the bone and upon implant, the femoral stem will be seated upon the harder portions of bone while the softer portions of bone will be compressed between the femoral stem and the harder portions of bone to accomplish fixation by an interference fit.

Abstract: A femoral broach for preparing an intramedullary canal for receiving a stem of a fermoral hip prosthesis is provided which comprises a body having posterior, anterior, medial and lateral faces, and divided generally into proximal and distal sections, the body having a shape corresponding substantially to the shape of the stem, the latter shape defined in part by a first curve along the posterior face, a second curve along the proximal portion of the anterior face, and a third curve along the distal portion of the anterior face. Each of the first, second and third curves are generated from different centers.

Abstract: The rasp-like reaming instrument is constructed as a hollow body with exterior teeth and openings adjacent the teeth. During use, bone material which is peeled off by the teeth is directed through the openings into the interior of the body to avoid accumulation of the material under the teeth. The cutting edges of the teeth remain unencumbered during a reaming operation.

Abstract: A bone broach and method of manufacture of the same for broaching the inside of a femur or other bone preparatory to the receipt of an implant, as in the installation of an artificial hip or the like. The borach is comprised of a support mandrel and a plurality of broach plates stacked on the mandrel and angularly referenced thereto, each of the broach plates having a peripheral surface shaped at least in part to form a cutting edge to define at least part of the desired bone opening for the respective axial position of that broach plate on the mandrel. In this manner, individual broach plates may be cut and finished as desired, so that once stacked on the mandrel in the appropriate order, the same collectively will define the desired three dimensional broach surface. Various embodiments are disclosed.

Abstract: A modular broach handle for use with a broach having a tapered configuration beginning at a wider upper end tapering to a smaller lower end. An elongated handle body portion has a longitudinal axis, with one end portion of the handle body defining a connection end portion for attaching a broach thereto at the wide upper end portion of the broach. A slot extends a distance along the handle terminating at one end thereof adjacent a connection end poriton of the handle body. A socket communicating with the slot is formed at the connection end portion of the handle body, the socket having an open end portion receptive of an attachment post on the wide end portion of the broach. A spring loaded slider bar is disposed within the slot for sliding movement therein and with respect to the handle between engaged and disengaged positions, and includes an end portion that extends into the socket when in the engaged position to form a connection with the post.

Abstract: A set of surgical products which includes an attachment mechanism for modular surgical products. The set includes a plurality of first components and a plurality of second components. One of the first components and one of the second components are to be selected for engagement with each other. The components each include an indexing means including a key on the first components and a corresponding slot on the second components for mating with the key. The orientations of the keys and slots vary, so that only first components having a key orientation that is similar to and aligns with the slot orientation of a second component will properly mate together and so that first components will not properly align and mate with second components having slot orientations that are different from the respective key orientation.

Abstract: The present invention is in an apparatus and surgical procedure for fitting a hip prosthetic implant to a distal femur in a surgical procedure, replacing the femur neck and ball end. The present process is for testing to verify that a distal femur intramedullary channel is properly prepared to receive, in friction fitting engagement, the prosthetic implant. Which process is practiced utilizing an adapter that is for coupling to a square drive of a torque wrench. In checking for proper intramedullary channel preparation a torsional force is transmitted through the adapter to a rasp seating in the channel, which rasp is used to prepare that intramedullary channel, the torsional force application, to verify proper intramedullary channel preparation, which torque wrench through adapter is also to apply a torsional force to a prosthetic implant seated in that prepared intramedullary channel to verify a proper friction fit thereof.

Abstract: A rasp tool comprises a handle and a cutter. The rasp tool carries a releasable locking assembly to couple the cutter to the handle. The releasable locking assembly is compactly arranged at the distal end of the handle and the mating proximal end of the cutter. The assembly includes a first interconnecting means for opposing longitudinal separation between the handle and the cutter, and a second interconnecting means for opposing lateral motion between the cutter and the handle. The releasable locking assembly provides an effective, simple to use, manually controllable means for attaching and detaching the cutter to the handle.

Abstract: A hand-held drill jig is utilized to locate and maintain a central axis through a head and an associated neck of a femur enabling a blind hole to be drilled into the femoral head oriented to the central axis. The drill jig is adjustable to accommodate a broad range of sizes of femurs and can be readily attached to, then removed from, the femur. A positioning mechanism is provided to firmly engage both the outer peripheral surface of the femoral head and the femoral neck. This operation renders associated drill bushing immobile relative to the femur and orients its longitudinal axis with the central axis. A drill bit is then capable of being guided through the drill bushing and into cutting engagement with the femoral head.

Abstract: A surgical instrument having a cutting end which includes a pair of grooves to provide a structure having a pair of opposed flanges. The back of the surgical instrument has a back channel. A pair of cutting edges are provided on the surgical instrument. The cutting edges are generally offset and parallel with respect to each other. A method for forming a channel in a femoral condyle of a knee joint of a person, and a method for reconstructing an anterior cruciate ligament of a knee joint of a person. The methods comprise using the surgical instrument in an inside-out fashion, as opposed to an outside-in fashion, in order to cut a trough into a femoral condyle.