50 results about "Opening wedge" patented technology

Apparatus for performing an open wedge, high tibial osteotomy, the apparatus comprising:a wedge-shaped implant for disposition in a wedge-shaped opening created in the tibia, wherein the wedge-shaped implant comprises at least two keys, laterally offset from one another, for disposition in corresponding keyholes formed in the tibia adjacent to the wedge-shaped opening created in the tibia.

A method for reconstructing a knee ligament and for performing a tibial osteotomy on the knee in a single procedure, the method comprising:forming a bone tunnel through the tibia at a location appropriate for the ligament reconstruction, disposing a graft ligament in the bone tunnel, and securing the graft ligament in the bone tunnel, and forming a wedge-like opening in the bone at a location appropriate for the tibial osteotomy, positioning an osteotomy implant in the wedge-like opening in the bone, and securing the osteotomy implant in the wedge-like opening in the bone;wherein the osteotomy implant is secured in the wedge-like opening in the bone with a fastener which extends through the implant and into the bone tunnel.

A keyhole drill guide stabilizer for stabilizing a drill guide when forming a second keyhole after the formation of a first keyhole, wherein the drill guide comprises a first drill bore and a second drill bore, the keyhole drill guide stabilizer comprising a body sized and shaped so as to make a close sliding fit with (i) the first bore of the drill guide, and (ii) the first keyhole, whereby to reduce the possibility of any positional variation between the first and second drilled keyholes.

Apparatus for performing an open wedge, high tibial osteotomy, the apparatus comprising:cutting apparatus for forming an osteotomy cut in the tibia, the cutting apparatus comprising:targeting apparatus for identifying a cutting plane through the tibia and a boundary line for terminating a cut made along the cutting plane, wherein the boundary line is located within the tibia, parallel to the anterior-posterior slope of the tibia and parallel to the sagittal plane of the patient.A method for performing an open wedge, high tibial osteotomy, the method comprising:positioning targeting apparatus for identifying a cutting plane through the tibia and a boundary line for terminating a cut made along the cutting plane, wherein the boundary line is located within the tibia, parallel to the anterior-posterior slope of the tibia and parallel to the sagittal plane of the patient;cutting the bone along the cutting plane, with the cut terminating at the boundary line;moving the bone on either side of the cut apart so as to form the wedge-like opening in the bone; andstabilizing the bone.

An osteotomy implant for supporting an open wedge osteotomy and method of use are described. In one form, the implant is configured to contain a graft material within the osteotomy. In another form, the implant is composed of multiple parts capable of being assembled either before or after insertion into the osteotomy.

A method for reconstructing a knee ligament and for performing a tibial osteotomy on the knee in a single procedure, the method comprising:forming a bone tunnel through the tibia at a location appropriate for the ligament reconstruction, disposing a graft ligament in the bone tunnel, and securing the graft ligament in the bone tunnel, and forming a wedge-like opening in the bone at a location appropriate for the tibial osteotomy, positioning an osteotomy implant in the wedge-like opening in the bone, and securing the osteotomy implant in the wedge-like opening in the bone;wherein the osteotomy implant is secured in the wedge-like opening in the bone with a fastener which extends through the implant and into the bone tunnel.

Apparatus for performing an open wedge, high tibial osteotomy, the apparatus comprising: a wedge-shaped implant for disposition in a wedge-shaped opening created in the tibia, wherein the wedge-shaped implant comprises a hole extending therethrough; a fixation screw for extending through the hole and securing the wedge-shaped implant to the tibia; and a locking mechanism for releasably locking the fixation screw to the wedge-shaped implant.Apparatus for performing an open wedge, high tibial osteotomy, the apparatus comprising: a fixation screw for securing an implant to the tibia, the fixation screw comprising: a shaft having a distal threaded portion and a proximal threaded portion, wherein the distal threaded portion and the proximal threaded portion are characterized by different thread pitches.

In one form of the present invention, there is provided an osteotomy implant for supporting an open wedge osteotomy, the osteotomy implant comprising: a first graft containment arm for disposition along one side of the open wedge osteotomy; a second graft containment arm for disposition along a second, opposite side of the open wedge osteotomy; and a base component for disposition along the mouth of the open wedge osteotomy, the base component being configured to selectively connect the first graft containment arm and the second graft containment arm to one another so as to form a generally wedge-shaped structure, wherein the base component constitutes the thicker end of the wedge. In another form of the present invention, there is provided a method for conducting an open wedge osteotomy, comprising: forming a wedge-like opening in the bone; positioning a first graft containment arm along one side of the wedge-like opening, and positioning a second graft containment arm along a second, opposite side of the wedge-like opening; and positioning a base component along the mouth of the wedge-like opening, the base component being selectively connected to the first graft containment arm and the second graft containment arm so as to form a generally wedge-shaped structure, wherein the base component constitutes the thicker end of the wedge.

Apparatus for performing an open wedge, high tibial osteotomy, the apparatus comprising: a wedge-shaped implant for disposition in a wedge-shaped opening created in the tibia, wherein the wedge-shaped implant comprises at least two keys, laterally offset from one another, for disposition in corresponding keyholes formed in the tibia adjacent to the wedge-shaped opening created in the tibia. Apparatus for performing an open wedge, high tibial osteotomy, the apparatus comprising: a wedge-shaped implant for disposition in a wedge-shaped opening created in the tibia, wherein the wedge-shaped implant comprises at least two keys, vertically offset from one another, for disposition in corresponding keyholes formed in the tibia adjacent to the wedge-shaped opening created in the tibia, and a shear rib, laterally offset from the at least two keys, for disposition in a corresponding shear rib keyhole formed in the tibia adjacent to the wedge-shaped opening created in the tibia.

Apparatus for performing an open wedge, high tibial osteotomy, the apparatus comprising:cutting apparatus for forming an osteotomy cut in the tibia, the cutting apparatus comprising:targeting apparatus for identifying a cutting plane through the tibia and a boundary line for terminating a cut made along the cutting plane, wherein the boundary line is located within the tibia, parallel to the anterior-posterior slope of the tibia and parallel to the sagittal plane of the patient.A method for performing an open wedge, high tibial osteotomy, the method comprising:positioning targeting apparatus for identifying a cutting plane through the tibia and a boundary line for terminating a cut made along the cutting plane, wherein the boundary line is located within the tibia, parallel to the anterior-posterior slope of the tibia and parallel to the sagittal plane of the patient;cutting the bone along the cutting plane, with the cut terminating at the boundary line;moving the bone on either-side of the cut apart so as to form the wedge-like opening in the bone; andstabilizing the bone.

Apparatus for performing an open wedge, high tibial osteotomy, the apparatus comprising a wedge-shaped implant for disposition in a wedge-shaped opening created in the tibia, wherein the wedge-shaped implant comprises at least one key for disposition in at least one corresponding keyhole formed in the tibia adjacent to the wedge-shaped opening created in the tibia, wherein each of the at least one keys comprises an interior bore for receiving a fixation screw, at least one fixation screw for disposition in the interior bore of the at least one key, and further wherein the apparatus is configured so that when the at least one fixation screw is received in the interior bore, the at least one fixation screw terminates within the bore.

Apparatus for performing an open wedge, high tibial osteotomy, the apparatus comprising a two-piece bearing implant comprising an upper bearing member and a lower bearing member, wherein the upper bearing member comprises a screw hole for securing the upper bearing member to an upper portion of bone, and the lower bearing member comprises a screw hole for securing the lower bearing member to a lower portion of bone, and further wherein the upper bearing member comprises an upper dovetail track and the lower bearing member comprises a lower dovetail track; and a wedge comprising an upper dovetail rail which is complementary to the upper dovetail track and a lower dovetail rail which is complementary to the lower dovetail track, in order that the wedge can be introduced between the upper and lower bearing members, so as to open a wedge-like opening between the upper and lower bearing members.

The present invention comprises a novel method and apparatus for performing an open wedge, high tibial osteotomy. More particularly, the present invention comprises the provision and use of a novel method and apparatus for forming an appropriate osteotomy cut into the upper portion of the tibia, manipulating the tibia so as to open an appropriate wedge-like opening in the tibia, and then mounting an appropriately-shaped implant at the wedge-like opening in the tibia, so as to stabilize the tibia with the desired orientation, whereby to reorient the lower portion of the tibia relative to the tibial plateau and hence adjust the manner in which load is transferred from the femur to the tibia.

An apparatus and method for performing an open wedge osteotomy. The apparatus includes devices for forming an open wedge osteotomy in bone, including a keyed-wedge implant. The method includes the steps of forming a cut in a bone, forming a keyhole in the bone surface at the proximal end of the cut, and positioning a keyed wedge-shaped implant into the cut formed into the bone.

An osteotomy implant for disposition in a wedge-shaped osteotomy opening in a bone, the implant comprising a body for disposition within the wedge-shaped osteotomy opening in the bone and supporting the bone while healing occurs; at least one key formed integral with the body for stabilizing the body relative to the adjacent bone while healing occurs; and at least one fenestration extending through the body for permitting bone growth through the implant.

Apparatus for performing an open wedge, high tibial osteotomy, the apparatus comprising: a wedge-shaped implant for disposition in a wedge-shaped opening created in the tibia, wherein the wedge-shaped implant comprises a hole extending therethrough; a fixation screw for extending through the hole and securing the wedge-shaped implant to the tibia; and a locking mechanism for releasably locking the fixation screw to the wedge-shaped implant. The fixation screw comprises: a shaft having a distal threaded portion and a proximal threaded portion, wherein the distal threaded portion and the proximal threaded portion are characterized by different thread pitches.

An osteotomy plate for maintaining the spacing of a wedge-like opening in bone, the osteotomy plate comprising: a body having a front side and a back side; a key extending out of the back side of the body for disposition in a keyhole formed in the bone along the wedge-like opening; and a plurality of mounting holes for receiving fixation screws therein, the mounting holes being formed in the body such that when the key is disposed in the keyhole, the mounting holes direct the fixation screws into bone on either side of the wedge-like opening.

An osteotomy plate for maintaining the spacing of a wedge-like opening in bone, the osteotomy plate comprising: a body having a front side and a back side; a key extending out of the back side of the body for disposition in a keyhole formed in the bone along the wedge-like opening; and a plurality of mounting holes for receiving fixation screws therein, the mounting holes being formed in the body such that when the key is disposed in the keyhole, the mounting holes direct the fixation screws into bone on either side of the wedge-like opening.

An apparatus for performing an open wedge high tibiotomy comprising: a cutting apparatus for forming an osteotomy incision in the tibia, the cutting apparatus comprising: identifying a cutting plane through the tibia and terminating Targeting device of the borderline of the cut along the cutting plane, wherein the borderline is positioned inside the tibia, parallel to the anterior-posterior slope of the tibia and parallel to the sagittal plane of the patient. A method for performing an open wedge high tibiotomy, the method comprising: positioning a targeting device for identifying a cutting plane through the tibia and a borderline for terminating cuts made along the cutting plane, wherein the borderline is positioned at Inside the tibia, parallel to the anterior-posterior slope of the tibia and parallel to the patient's sagittal plane; cut the bone along the cutting plane, with the cut terminating at the borderline; move the bone on each side of the cut apart to create a wedge-shaped opening in the bone; and stable bone.

Apparatus for performing an open wedge, high tibial osteotomy, the apparatus comprising a wedge-shaped implant for disposition in a wedge-shaped opening created in the tibia, wherein the wedge-shaped implant comprises at least one key for disposition in at least one corresponding keyhole formed in the tibia adjacent to the wedge-shaped opening created in the tibia, wherein each of the at least one keys comprises an interior bore for receiving a fixation screw, at least one fixation screw for disposition in the interior bore of the at least one key, and further wherein the apparatus is configured so that when the at least one fixation screw is received in the interior bore, the at least one fixation screw terminates within the bore.

Apparatus for performing an open wedge, high tibial osteotomy, the apparatus comprising: cutting apparatus for forming an osteotomy cut in the tibia, the cutting apparatus comprising: targeting apparatus for identifying a cutting plane through the tibia and a boundary line for terminating a cut made along the cutting plane, wherein the boundary line is located within the tibia, parallel to the anterior-posterior slope of the tibia and parallel to the sagittal plane of the patient. A method for performing an open wedge, high tibial osteotomy, the method comprising: positioning targeting apparatus for identifying a cutting plane through the tibia and a boundary line for terminating a cut made along the cutting plane, wherein the boundary line is located within the tibia, parallel to the anterior-posterior slope of the tibia and parallel to the sagittal plane of the patient; cutting the bone along the cutting plane, with the cut terminating at the boundary line; moving the bone on eitherside of the cut apart so as to form the wedge-like opening in the bone; and stabilizing the bone.

An osteotomy implant for disposition in a wedge-shaped osteotomy opening in a bone, the implant comprising:a body for disposition within the wedge-shaped osteotomy opening in the bone and supporting the bone while healing occurs;at least one key formed integral with the body for stabilizing the body relative to the adjacent bone while healing occurs; andat least one fenestration extending through the body for permitting bone growth through the implant.An osteotomy implant for disposition in a wedge-shaped osteotomy opening in a bone, the implant comprising:a body for disposition within the wedge-shaped osteotomy opening in the bone and supporting the bone while healing occurs; andat least one key formed integral with the body for stabilizing the body relative to the adjacent bone while healing occurs;wherein at least a portion of the body and the at least one key are formed out of a relatively strong, load-bearing material whereby to stabilize the bone during healing;and further wherein at least a portion of the body is formed out of a bone growth-promoting material whereby to enhance bone healing across the osteotomy opening in the bone.

The present invention comprises a novel method and apparatus for performing an open wedge, high tibial osteotomy. More particularly, the present invention comprises the provision and use of a novel method and apparatus for forming an appropriate osteotomy cut into the upper portion of the tibia, manipulating the tibia so as to open an appropriate wedge-like opening in the tibia, and then mounting an appropriately-shaped implant at the wedge-like opening in the tibia, so as to stabilize the tibia with the desired orientation, whereby to reorient the lower portion of the tibia relative to the tibial plateau and hence adjust the manner in which load is transferred from the femur to the tibia.

An osteotomy plate for maintaining the spacing of a wedge-like opening in bone, the osteotomy plate comprising:a body having a front side and a back side;a protrusion extending out of the back side of the body for disposition in the wedge-like opening; anda plurality of mounting holes for receiving fixation screws therein, the mounting holes being formed in the body such that when the protrusion is disposed in the wedge-like opening, the mounting holes direct the fixation screws into bone on either side of the wedge-like opening.

A method for performing an open wedge, high tibial osteotomy, the method comprising:identifying a cutting plane through the tibia and a boundary line for terminating a cut made along the cutting plane, wherein the boundary line is located within the tibia, parallel to the anterior-posterior slope of the tibia and parallel to the sagittal plane of the patient;positioning a hollow cylinder adjacent to an exterior surface of the tibia and co-axial with the boundary line;positioning a fluoroscope so that its field of view is parallel to the anterior-posterior slope of the tibia, parallel to the sagittal plane of the patient, and co-axial with the hollow cylinder;imaging with the fluoroscope and observing the profile of the hollow cylinder so as to confirm that the hollow cylinder is aligned co-axial with the boundary line;advancing an apex pin through the hollow cylinder and into the tibia along the boundary line so as to provide a positive stop at the boundary line for limiting cutting along the cutting plane;cutting the tibia along the cutting plane, with the cut terminating at the boundary line;moving the tibia on either side of the cut apart so as to form a wedge-like opening in the tibia; andstabilizing the tibia.A method for performing an open wedge, high tibial osteotomy, the method comprising:identifying a cutting plane through the tibia and a boundary line for terminating a cut made along the cutting plane, wherein the boundary line is located within the tibia, parallel to the anterior-posterior slope of the tibia and parallel to the sagittal plane of the patient;positioning a hollow apex pin adjacent to an exterior surface of the tibia and co-axial with the boundary line;positioning a fluoroscope so that its field of view is parallel to the anterior-posterior slope of the tibia, parallel to the sagittal plane of the patient, and co-axial with the hollow apex pin;imaging with the fluoroscope and observing the profile of the hollow apex pin so as to confirm that the hollow apex pin is aligned co-axial with the boundary line;advancing the hollow apex pin into the tibia along the boundary line so as to provide a positive stop at the boundary line for limiting cutting along the cutting plane;cutting the tibia along the cutting plane, with the cut terminating at the boundary line;moving the tibia on either side of the cut apart so as to form a wedge-like opening in the tibia; andstabilizing the tibia.

An apparatus for performing an open wedge, high tibial osteotomy, the apparatus comprising: a wedge-shaped implant for disposition in a wedge-shaped opening created in the tibia, wherein the wedge-shaped implant comprises at least two keys, laterally offset from one another, for disposition in corresponding keyholes formed in the tibia adjacent to the wedge-shaped opening created in the tibia.; Apparatus for performing an open wedge, high tibial osteotomy, the apparatus comprising: a wedge-shaped implant for disposition in a wedge-shaped opening created in the tibia, wherein the wedge-shaped implant comprises at least two keys, vertically offset from one another, for disposition in corresponding keyholes formed in the tibia adjacent to the wedge-shaped opening created in the tibia, and a shear rib, laterally offset from the at least two keys, for disposition in a corresponding shear rib keyhole formed in the tibia adjacent to the wedge-shaped opening created in the tibia.

A UV curable ink-jet recording apparatus includes: a recording medium transporting unit; an ink-jet head; and a UV irradiating unit, wherein the apparatus includes a light capturing portion between the UV irradiating unit and the ink-jet head, at least a part of the light capturing portion as seen in a longitudinal section taken vertically along a direction of transporting the recording medium has an opened wedge shape having no base side and comprising: a side vertical to the recording medium; and an oblique side which is in contact with a top of the vertical side, and which extends obliquely downward, the vertical side is located on the side of the ink-jet head, and the oblique side downward extends from the top toward the UV irradiating unit.

The invention provides a low-emission gasoline grass trimmer. According to the improved low-emission gasoline grass trimmer, two narrowed auxiliary vent holes which are used for a left box seat and a right box seat respectively, an air scavenging channel opening wedge turbulence returning piece and two auxiliary skirts of a piston are used in cooperation with one another. A spraying nozzle (70a) with four branches is arranged on a carburetor of the low-emission gasoline grass trimmer so that atomization can be facilitated and the unexpected emission reduction and standard reaching effect can be achieved. A grass trimming head (54) with a grass cutting and trimming steel wire rope (54b) is arranged on a cutter, a nylon wire is replaced by the steel wire rope, and therefore the long-lasting cutting is facilitated. An outer protective cover (73) which is arranged on an inner protective cover (60) is arranged on the cutter, a long grass pressing wheel (74) with the roller length equal to the grass trimming diameter is arranged on the outer protective cover of the cutter, and therefore grass pressing, soil moisture conservation and grass pattern forming are facilitated. A cutter disc (64) with internal saw teeth (642) is arranged in the cutter, outer cutting edges (641) of the peripheries of four extending knives are respectively provided with a plurality of outer sawing teeth (64a), and the number of the internal saw teeth (642) is also four, the internal saw teeth (642) are respectively provided with a plurality of teeth, and therefore the condition that the grass is too hard to cut is avoided. The quality and the usability of the low-emission gasoline grass trimmer are improved.