US20180147069A9 - Cup impactor - Google Patents
Cup impactor Download PDFInfo
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- US20180147069A9 US20180147069A9 US15/517,238 US201515517238A US2018147069A9 US 20180147069 A9 US20180147069 A9 US 20180147069A9 US 201515517238 A US201515517238 A US 201515517238A US 2018147069 A9 US2018147069 A9 US 2018147069A9
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- Prior art keywords
- impactor
- cup
- prosthesis
- drive train
- distal
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
- A61F2/4609—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of acetabular cups
-
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/34—Acetabular cups
-
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30428—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by inserting a protrusion into a slot
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30471—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements connected by a hinged linkage mechanism, e.g. of the single-bar or multi-bar linkage type
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
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- A—HUMAN NECESSITIES
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30604—Special structural features of bone or joint prostheses not otherwise provided for modular
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- A—HUMAN NECESSITIES
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
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- A61F2002/30621—Features concerning the anatomical functioning or articulation of the prosthetic joint
- A61F2002/30624—Hinged joint, e.g. with transverse axle restricting the movement
- A61F2002/30635—Cardan or gimbal joints
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- A—HUMAN NECESSITIES
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/34—Acetabular cups
- A61F2002/3401—Acetabular cups with radial apertures, e.g. radial bores for receiving fixation screws
- A61F2002/3403—Polar aperture
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- A—HUMAN NECESSITIES
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- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
- A61F2002/4629—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof connected to the endoprosthesis or implant via a threaded connection
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2002/4635—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor using minimally invasive surgery
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- A—HUMAN NECESSITIES
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
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- A61F2002/4681—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor by applying mechanical shocks, e.g. by hammering
Definitions
- This invention relates to a surgical cup impactor, method, kit, surgical system and surgical apparatus for use in inserting a cup prosthesis in a bone cavity.
- the invention has particular application to a surgical impactor for accurately inserting a cup prosthesis in a prepared enlarged and shaped cavity within a bone.
- a typical impactor has an impactor body, a drive train assembly, an impactor nose, and a clamping handle.
- the impactor body has on its proximal end, an impaction plate connected thereto, and an impactor handle formed thereon for handling by the surgeon and, on the distal end, an impactor cup support portion having a receiver recess therein.
- a drive train assembly used in such an impactor typically has a prosthesis engaging interface at a distal end thereof, and a proximal end on which a positioning knob is formed. The assembly is typically received and rotatably mounted in the receiver recess of the body so as to expose the prosthesis engaging surface through an impactor nose.
- a clamping handle pulls the proximal portion of the drive train assembly and, because the cup prosthesis is engaged with the engaging interface, clamps any cup prosthesis attached to the engaging interface against the impactor nose so as not to strain the proximal end of the drive train assembly.
- the entire drive train is pulled by the clamping handle, which results in considerable strain.
- the universal joint often fails due to this strain, which may result in inconvenience to the patient via complications in the surgical procedure.
- a cup impactor is provided, adapted to assist a surgeon in controlling implantation of a cup prosthesis.
- the impactor has an impactor body, a drive train assembly, an impactor nose, and a clamping handle.
- the impactor body has on its proximal end, an impaction plate connected thereto, and an impactor handle formed thereon for handling by the surgeon and, on the distal end, an impactor cup support portion having a receiver recess therein.
- a drive train assembly has a prosthesis engaging interface at a distal end thereof, and a proximal end on which a positioning knob is formed. The assembly is received and rotatably mounted in the receiver recess of the body so as to expose the prosthesis engaging surface.
- An impactor nose mounts on the distal end of the impactor body, through which the prosthesis engaging interface extends.
- a clamping handle pulls distal portion of the drive train assembly and therefore any cup prosthesis attached to the engaging interface against the impactor nose so as not to strain the proximal end of the drive train assembly.
- FIG. 1 is a perspective view of the preferred embodiment of the cup impactor, typically an acetabular cup impactor of the invention.
- FIG. 2 is a side view of the preferred embodiment of the acetabular cup impactor.
- FIG. 3 is a cross-section view of the acetabular cup impactor in the clamped position.
- FIG. 4 is a cross-section view of the acetabular cup impactor in the opened position.
- FIG. 5A is a detailed view of the distal end of the acetabular cup impactor.
- FIG. 5B is a detailed cross-section view of the distal end of the acetabular cup impactor.
- FIG. 5C is a partial view of the distal end of the acetabular cup impactor.
- FIG. 6A is a partial view of the drive train bearing of the acetabular cup impactor.
- FIG. 6B is a cross-section view of the drive train bearing of the acetabular cup impactor.
- FIG. 7 is a perspective view of the acetabular cup impactor in the disassembled configuration.
- FIG. 8 is a detailed cross-section view of the handle release mechanism.
- FIG. 9A is a detailed cross-section view of the distal end of a second embodiment of the acetabular cup impactor.
- FIG. 9B is a detailed cross-section view of the distal end of a third embodiment of the acetabular cup impactor.
- FIG. 10 is a top view of an alternate embodiment of the impactor of the invention.
- FIG. 11 is a cross-sectional view of the alternate embodiment of FIG. 10 .
- FIG. 12 is a cross-sectional view of the alternate embodiment of FIG. 10 , with the lever released so as to release an impactor head.
- FIG. 13 is a perspective view of an alternate embodiment of the invention shown in FIG. 5A .
- FIG. 14 is a partial, perspective view of elements of the alternate embodiment of the invention shown in FIG. 5A .
- FIG. 15 is a top or plan view of a second alternate embodiment of the impactor of the invention.
- FIG. 16 is a cross-sectional plan view of the second alternate embodiment of the impactor of the invention in an unlocked position.
- FIG. 17 is a cross-sectional plan view of the second alternate embodiment of the impactor of the invention in a locked position.
- FIG. 18 is a plan view of a kit of the invention.
- FIG. 19 is a flow chart of a method of the invention.
- an acetabular cup impactor 1 is provided to assist the surgeon in controlling the implantation of an acetabular cup prosthesis 9 .
- the acetabular cup impactor 1 comprises an impactor body 8 having on its proximal end an impaction plate 7 fixedly connected to it. Openings and grooves are made in the proximal end of the impactor body 8 , below the impaction plate, to form the impactor handle 6 and accommodate the handling of the instrument by the surgeon's hand. Note that further openings and grooves 100 are added to facilitate cleaning and sterilization.
- the distal end of the cup impactor has a prosthesis engaging interface 11 (preferably threaded) located on the distal end of a drive train.
- a positioning knob 2 attached to the proximal end of a drive train allows rotation of it and therefore rotation of the cup prosthesis 9 .
- Both proximal and distal ends of the drive train are linked together by a universal joint 34 .
- the drive train assembly 71 is enclosed and maintained into the impactor body 8 by the drive train bearing 32 .
- a clamping handle 5 allows the locking of the distal end of the drive train and therefore securing the acetabular cup prosthesis 9 against the impactor body 8 .
- the release handle actuator 4 allows disassembling of the clamping handle 5 for easier cleaning and sterilization of the instrument.
- the impactor body 8 may be C-shaped in order to minimize the invasiveness of the surgery by clearing anatomical structures.
- the axis of the impactor handle 6 is approximately aligned with the axis of the prosthesis engaging interface 11 . It will be noted that different shape of the impactor body 8 and different offset (width of the C-shape) may be used without deviating from the scope of the present invention.
- FIG. 3 the cross-section view of the acetabular cup impactor is shown in the clamped position.
- the distal drive train shaft 35 has a threaded tip 37 here shown with an acetabular cup prosthesis 9 fully screwed therein.
- the retaining flange 55 (shown in FIG. 5C ) sits on the internal bottom face of the acetabular cup prosthesis 9 once fully threaded in.
- the distal drive train shaft 35 , the threaded tip 37 and the retaining flange 55 together form the prosthesis engaging interface 11 .
- the distal drive train shaft 35 is engaged into the U-shaped trough of the clamping slide 36 .
- the clamping slide 36 moves along the axis of the distal drive train shaft 35 by sliding into slide grooves 21 on internal surfaces of the impactor body 8 .
- the retaining flange 51 of the distal drive train shaft 35 contacts the proximal face of the clamping slide 36 and is pulled backward when the clamping slide 36 moves backward.
- the backward displacement of the distal drive train shaft 35 pulls the acetabular cup prosthesis 9 against the impactor nose 38 . Once the pulling force has reached a certain level, friction forces between the internal bottom face of the acetabular cup prosthesis 9 and the front face of the impactor nose 38 prevent the cup prosthesis from moving or rotating.
- FIG. 4 a cross-section view of the acetabular cup impactor is shown in the open position. Note that the acetabular cup prosthesis is not shown in this figure for clarity and to simplify the drawing.
- the clamping slide 36 is linked to the clamping handle 5 by a clamping lever 31 .
- the three components are linked together with two pins 23 a, 23 b acting as hinges. Eccentric pins may be used (in this embodiment and the further embodiments herein described) to adjust the length of the hinges and therefore the force (tension) of the clamping.
- the rotation ( 41 ) of the clamping handle 5 away from the impactor body 8 induces movement of the clamping lever 31 which also induces movement of the clamping slide 36 .
- the clamping slide 36 slides frontward (towards the tip of the cup impactor) and therefore releases the pulling force on the distal drive train shaft 35 .
- the distal drive train shaft 35 can then be free to move frontward ( 42 ) and therefore releasing the friction forces between the cup prosthesis 9 and the impactor nose 38 .
- the distal drive train shaft 35 (and therefore the acetabular cup prosthesis 9 when mounted on the prosthesis engaging interface 11 ) is free to rotate when the positioning knob 2 of the drive train is rotated.
- the rotation ( 41 ) of the clamping handle 5 in the opposite direction, towards the impactor body 8 induces a backward movement of the clamping slide 36 (towards the handle of the cup impactor) and therefore moves the distal drive train shaft 35 backward.
- the backward displacement of the distal drive train shaft 35 moves the acetabular cup prosthesis 9 against the impactor nose 38 until they contact each other.
- the elastic deformation of the clamping lever 31 acting like a spring, ensures a progressive and increasing pulling force on the distal drive train shaft 35 until the clamping handle 5 has reached its final backward position shown in FIG. 3 .
- the increase of the force given by the clamping lever 31 reaches a neutral point a little before the clamping handle 5 has reached its final backward position. Exceeding this neutral point, the force will decrease a little but also ensure that the clamping handle 5 stays in position against the impactor body 8 during impaction shocks.
- a cross-section view of the distal part of the acetabular cup impactor shows the impactor nose 38 having a C-ring 52 allowing it to be snapped on the distal tip of the impactor body 8 .
- the impactor nose 38 can be further pulled apart from the impactor body for disassembling of the drive train assembly 71 .
- the profile of the impactor nose 38 is be adapted to the inner surface of the cup prosthesis 9 .
- Several impactor noses 38 can be provided in a kit in order to accommodate different implants 9 .
- the distal portion of the impactor nose 38 may include an anti-rotation feature having a shape (square, hexagonal, etc.) that will match that of the cup prosthesis 9 .
- this feature engages into a corresponding feature of the cup 9 , and therefore prevents rotation of the implant 1 , 1 ′, and 1 ′′.
- FIG. 5C shows the distal drive train shaft 35 , the clamping slide 36 and the clamping lever 31 without the impactor body 8 .
- FIG. 6A the fixation mechanism of the drive train is shown.
- the proximal drive train shaft 33 is snapped into the drive train bearing 32 .
- a cross-section view of the drive train bearing 32 having a C-shaped opening with two elastic retaining lips 61 is shown in FIG. 6B .
- the drive train assembly 71 and therefore the proximal drive train shaft 33 , can rotate and axially move into the drive train bearing 32 .
- Two stops 53 and 54 limit the axial displacement of the shaft 33 .
- the drive train bearing 32 is connected to the impactor body 8 through two bearing pins 24 which allows it to pivot. In the preferred embodiment, the drive train bearing 32 is made out of plastic.
- FIG. 7 a disassembled view of the acetabular cup impactor 1 is shown adapted for easier cleaning and sterilization of the instrument.
- FIG. 8 a detailed cross-section of the handle release mechanism is shown.
- the release pins 85 connected to the handle actuator clear the pivoting hole openings 73 where the handle pivoting pins 23 of the clamping handle 5 are maintained. It allows the clamping handle 5 to be disengaged from the impactor body, aided by internally disposed grooves 21 shown in dashed lines in the figure.
- the spring 83 mounted on the shaft 82 moves the release handle actuator 4 back on its initial down position.
- the clamping handle 5 and the clamping lever 31 may then be drawn out of the impactor body where the pins 22 exit the internal grooves and free the assembly. In order to avoid losing pieces, the clamping lever 31 stays connected to the clamping slide 36 .
- the impactor nose 75 may also be pulled out of the impactor body 8 . It will clear the U-shaped opening 77 which allows the distal drive train shaft 35 of the drive train assembly 71 to be removed. The complete drive train assembly 71 may then be drawn out of the impactor body 8 by pulling on it and unsnapping it from the drive train bearing 32 .
- the clamping lever 31 and the clamping handle 5 are placed back into the impactor body 8 .
- the handle pivoting pins 23 of the clamping handle 5 are then engaged into the pivoting hole opening 73 . This action pushes the release pins 85 up until the handle pivoting pins 23 are fully engaged into the impactor body 8 .
- the release pins 85 move then back into their initial position and lock ( 84 ) the handle pivoting pins 23 .
- the drive train assembly 71 may then be snapped back into the drive train bearing 32 and replaced into the impactor body 8 .
- the impactor nose 75 may also be snapped back onto the distal tip of the impactor body 8 .
- a clamping slide 91 having a concave kidney bean shape is shown. Movement of the clamping lever 31 induced rotation of the clamping slide 91 around the pivoting pin 93 .
- the retaining section 92 of distal drive train shaft 94 which slides on the concave face of the clamping slide 91 , follows the movement of the clamping slide and is pulled backward. As described above, the backward displacement of the distal drive train shaft 94 locks the acetabular cup prosthesis against the impactor nose.
- a clamping slide 95 is shown having a convex kidney bean shape. Movement of the clamping lever 31 induced rotation of the clamping slide 95 around the pivoting pin 97 .
- the spherical retaining section 96 of distal drive train shaft 98 which slides on the convex face of the clamping slide 95 , follows the movement of the clamping slide and is pulled backward. As described above, the backward displacement of the distal drive train shaft 98 locks the acetabular cup prosthesis against the impactor nose.
- FIGS. 10, 11 and 12 a variant of the embodiment of FIGS. 2, 3 and 4 is shown in which the clamping handle 5 ′ of the cup impactor l′ is located on the top of the impactor body 8 ′. Pulling on the clamping handle 5 ′ releases the cup 9 (by moving the threaded tip 37 forward), and pushing on the clamping handle 5 ′ locks the cup 9 (by moving the threaded tip 37 backward).
- FIGS. 13 and 14 different embodiment of FIGS. 5A and 5C where an additional retaining section 140 has been added to the distal drive shaft 35 .
- This retaining section 140 contacts the distal face of the clamping slide 36 ′ and is pushed frontward when the clamping slide 36 ′ moves frontward.
- the frontward displacement of the distal drive train shaft 35 moves the cup away from the nose 38 .
- the clamping slide 36 ′ having one groove 22 ′ on each side, moves along the axis of the distal drive train shaft 35 by sliding onto the two rails 21 ′ of the impactor body 8 ′.
- the impactor nose 38 has one flange 130 on each side that contacts the lateral side of the distal end of the impactor body 8 ′ in order to prevent it from rotating.
- FIGS. 15 to 17 a further embodiment of the invention 1 ′′ is shown having additional lever arm stages 160 and 161 which increases leverage and thereby reduces the force required on the clamping handle 5 ′′ to pull or clamp on the cup 9 .
- FIG. 15 shows the side view of the cup impactor 1 ′′ with the clamping handle 5 ′′ in the closed position.
- FIG. 16 shows a cross section of this side view with the linkage made up of a first stage lever 160 , pivotally connected via a pin 31 b to the lever 31 ′′ and to pivot with respect to the housing 8 ′′ on a pin 160 a, and to a second stage lever arm 161 via a pin 160 b.
- the second stage lever 161 is in turn connected via a pin 161 a to the clamping handle 5 ′′.
- the clamping handle 5 ′′ is pivotally connected to the housing 8 ′′ via pin 23 ′′.
- the assembly is shown in cross section in this figure in a lock or clamping position.
- the impactor 1 ′′ is shown in cross section with the clamping handle 5 ′′ and levers connected thereto, in an open (unlocked or unclamped) position (release of the cup). It is evident that this configuration increases the leverage essentially by the length of the lever arms of lever arm stages 160 and 161 while not dramatically increasing the envelop required to operate the mechanism, thereby saving space while making it easier for the surgeon to clamp and unclamp a prosthesis 9 to the impactor nose 38 .
- the lever 31 , 31 ′, 31 ′′ activated by the clamping handle 5 , 5 ′, 5 ′′, pulls the distal drive train shaft with the clamping slide 36 (in order to lock the cup) that does not put any force on the universal joint or the proximal region of the drive train assembly 71 , 71 ′. This increases the service life of the impactor of the invention.
- the drive train assembly 71 may be replaced with alternative drive train assemblies 71 ′ having an alternative prosthesis engaging surface 11 ′ which is readily removable and replaceable.
- a surgical kit 200 includes: (a) a tool holder sterilization case 202 having compartments for holding elements needed to effect a given surgical intervention; (b) the impactor 1 , 1 ′, 1 ′′ of the invention; (c) at least one drive train assembly 71 , 71 ′; (d) optionally, an additional impactor nose 38 ′.
- the kit 200 may further include: (e) a surgical reamer handle 220 for preparing the acetabulum for a prosthesis 9 ; and (f) a selection of acetabular reamers 222 for connection to and operation with the surgical reamer.
- the impactor nose 38 includes an anti-rotation feature 38 b having a shape (of any cross section such as square, hexagon, or polygon) that interfacingly locks against a corresponding feature of a cup prosthesis 9 .
- a surgical method 300 of the invention includes several steps.
- a first step 302 the impactor 1 , 1 ′, 1 ′′ of the invention or the kit 200 of the invention is provided.
- a suitable cup prosthesis receiving surface on a bone of a patient is prepared through a surgical opening.
- a selected cup prosthesis is placed on an end of the impactor.
- the cup prosthesis 9 is oriented with a positioning knob 2 of the impactor.
- the prosthesis 9 is clamped against an impactor nose 38 .
- a sixth step 312 the cup prosthesis 9 is positioned in a proper orientation against the prepared bone surface by carefully and controllably impacting the impactor so as to advance the prosthesis in a final position against the bone.
- a seventh step 314 the impactor is withdrawn and the opening is sterilized and closed.
- An advantage of the present invention is to provide a simple device where the acetabular cup prosthesis 9 may be oriented first with the positioning knob 2 and then locked in an angular orientation against the impaction nose 38 by pulling on the clamping handle 5 .
- the connection between the prosthesis is robust as the connection is made without any play or gaps therebetween, ensuring good support during impaction.
- Another advantage of the invention is to provide a robust instrument by dissociating the orientation of the prosthesis made with the drive train assembly 71 and the locking of the prosthesis against the impactor nose.
- Prior art shows devices where the drive train assembly and its constituting universal joint are used to pull the prosthesis against the impactor nose.
- the present invention does not put any load on the universal joint when pulling the prosthesis against the impactor nose.
- Another advantage of the invention is to provide a cup impactor 1 , 1 ′, 1 ′′ having a prosthesis engaging interface 11 , which is part of the drive train assembly 71 , thereby being easily exchangeable in order to match with different prosthesis interfaces.
- Another advantage of the invention is to minimize the number of components and the risk that parts could be lost.
- the present invention may be embodied as a system, a device, or a method.
- system contemplates the use, sale and/or distribution of any goods, services or information having similar functionality described herein.
- the terms “comprises”, “comprising”, or variations thereof, are intended to refer to a non-exclusive listing of elements, such that any apparatus, process, method, article, or composition of the invention that comprises a list of elements, that does not include only those elements recited, but may also include other elements such as those described in the instant specification. Unless otherwise explicitly stated, the use of the term “consisting” or “consisting of” or “consisting essentially of” is not intended to limit the scope of the invention to the enumerated elements named thereafter, unless otherwise indicated. Other combinations and/or modifications of the above-described elements, materials or structures used in the practice of the present invention may be varied or adapted by the skilled artisan to other designs without departing from the general principles of the invention.
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Transplantation (AREA)
- Heart & Thoracic Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Veterinary Medicine (AREA)
- Vascular Medicine (AREA)
- Cardiology (AREA)
- Animal Behavior & Ethology (AREA)
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- Physical Education & Sports Medicine (AREA)
- Prostheses (AREA)
- Dental Prosthetics (AREA)
Abstract
Description
- This application claims the benefit of U.S. Provisional Application No. 62/062,166, filed Oct. 10, 2014, entitled: “ACETABULAR CUP IMPACTOR”, the contents of which are incorporated herein by reference thereto.
- A portion of the disclosure of this patent document contains material which is subject to copyright protection. The Applicant has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure as it appears in the Patent and Trademark Office patent file or records, but otherwise reserves all copyright rights whatsoever. Further, no references to third party patents or articles made herein is to be construed as an admission that the present invention is not entitled to antedate such material by virtue of prior invention.
- This invention relates to a surgical cup impactor, method, kit, surgical system and surgical apparatus for use in inserting a cup prosthesis in a bone cavity. The invention has particular application to a surgical impactor for accurately inserting a cup prosthesis in a prepared enlarged and shaped cavity within a bone.
- Surgical cup impactors exist in the art that assist a surgeon in controlling implantation of a cup prosthesis. A typical impactor has an impactor body, a drive train assembly, an impactor nose, and a clamping handle. The impactor body has on its proximal end, an impaction plate connected thereto, and an impactor handle formed thereon for handling by the surgeon and, on the distal end, an impactor cup support portion having a receiver recess therein. A drive train assembly used in such an impactor typically has a prosthesis engaging interface at a distal end thereof, and a proximal end on which a positioning knob is formed. The assembly is typically received and rotatably mounted in the receiver recess of the body so as to expose the prosthesis engaging surface through an impactor nose. A clamping handle pulls the proximal portion of the drive train assembly and, because the cup prosthesis is engaged with the engaging interface, clamps any cup prosthesis attached to the engaging interface against the impactor nose so as not to strain the proximal end of the drive train assembly. Typically, therefore, the entire drive train is pulled by the clamping handle, which results in considerable strain. The universal joint often fails due to this strain, which may result in inconvenience to the patient via complications in the surgical procedure.
- What is needed therefore is a means which prevents the pulling on the universal joint or universal joints of the drive train assembly in order to promote the reliability and durability of the tool and thereby minimize complications to the patient.
- A cup impactor is provided, adapted to assist a surgeon in controlling implantation of a cup prosthesis. The impactor has an impactor body, a drive train assembly, an impactor nose, and a clamping handle. The impactor body has on its proximal end, an impaction plate connected thereto, and an impactor handle formed thereon for handling by the surgeon and, on the distal end, an impactor cup support portion having a receiver recess therein. A drive train assembly has a prosthesis engaging interface at a distal end thereof, and a proximal end on which a positioning knob is formed. The assembly is received and rotatably mounted in the receiver recess of the body so as to expose the prosthesis engaging surface. An impactor nose mounts on the distal end of the impactor body, through which the prosthesis engaging interface extends. A clamping handle pulls distal portion of the drive train assembly and therefore any cup prosthesis attached to the engaging interface against the impactor nose so as not to strain the proximal end of the drive train assembly.
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FIG. 1 is a perspective view of the preferred embodiment of the cup impactor, typically an acetabular cup impactor of the invention. -
FIG. 2 is a side view of the preferred embodiment of the acetabular cup impactor. -
FIG. 3 is a cross-section view of the acetabular cup impactor in the clamped position. -
FIG. 4 is a cross-section view of the acetabular cup impactor in the opened position. -
FIG. 5A is a detailed view of the distal end of the acetabular cup impactor. -
FIG. 5B is a detailed cross-section view of the distal end of the acetabular cup impactor. -
FIG. 5C is a partial view of the distal end of the acetabular cup impactor. -
FIG. 6A is a partial view of the drive train bearing of the acetabular cup impactor. -
FIG. 6B is a cross-section view of the drive train bearing of the acetabular cup impactor. -
FIG. 7 is a perspective view of the acetabular cup impactor in the disassembled configuration. -
FIG. 8 is a detailed cross-section view of the handle release mechanism. -
FIG. 9A is a detailed cross-section view of the distal end of a second embodiment of the acetabular cup impactor. -
FIG. 9B is a detailed cross-section view of the distal end of a third embodiment of the acetabular cup impactor. -
FIG. 10 is a top view of an alternate embodiment of the impactor of the invention. -
FIG. 11 is a cross-sectional view of the alternate embodiment ofFIG. 10 . -
FIG. 12 is a cross-sectional view of the alternate embodiment ofFIG. 10 , with the lever released so as to release an impactor head. -
FIG. 13 is a perspective view of an alternate embodiment of the invention shown inFIG. 5A . -
FIG. 14 is a partial, perspective view of elements of the alternate embodiment of the invention shown inFIG. 5A . -
FIG. 15 is a top or plan view of a second alternate embodiment of the impactor of the invention. -
FIG. 16 is a cross-sectional plan view of the second alternate embodiment of the impactor of the invention in an unlocked position. -
FIG. 17 is a cross-sectional plan view of the second alternate embodiment of the impactor of the invention in a locked position. -
FIG. 18 is a plan view of a kit of the invention. -
FIG. 19 is a flow chart of a method of the invention. - Those skilled in the art will appreciate that elements in the Figures are illustrated for simplicity and clarity and have not necessarily been drawn to scale. For example, dimensions may be exaggerated relative to other elements to help improve understanding of the invention and its variants. Furthermore, when the terms ‘first’, ‘second’, and the like are used herein, their use is intended for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. Moreover, relative terms like ‘front’, ‘back’, ‘top’ and ‘bottom’, and the like in the Description and/or in the claims are not necessarily used for describing exclusive relative position. Those skilled in the art will therefore understand that such terms may be interchangeable with other terms, and that the variants described herein are capable of operating in other orientations than those explicitly illustrated or otherwise described.
- The following description is not intended to limit the scope of the invention in any way as they are exemplary in nature, serving to describe the best mode of the invention known the inventors as of the filing date hereof. Consequently, changes may be made in the arrangement and/or function of any of the elements described in the exemplary variants disclosed herein without departing from the spirit and scope of the invention. Specifically, although the invention, kit and method herein described is presented in the form of an acetabular cup impactor, this disclosure should not be interpreted as being limited thereto.
- Referring to
FIGS. 1 and 2 , anacetabular cup impactor 1 is provided to assist the surgeon in controlling the implantation of anacetabular cup prosthesis 9. Theacetabular cup impactor 1 comprises animpactor body 8 having on its proximal end animpaction plate 7 fixedly connected to it. Openings and grooves are made in the proximal end of theimpactor body 8, below the impaction plate, to form theimpactor handle 6 and accommodate the handling of the instrument by the surgeon's hand. Note that further openings andgrooves 100 are added to facilitate cleaning and sterilization. - The distal end of the cup impactor has a prosthesis engaging interface 11 (preferably threaded) located on the distal end of a drive train. A
positioning knob 2 attached to the proximal end of a drive train allows rotation of it and therefore rotation of thecup prosthesis 9. Both proximal and distal ends of the drive train are linked together by auniversal joint 34. Thedrive train assembly 71 is enclosed and maintained into theimpactor body 8 by the drive train bearing 32. Aclamping handle 5 allows the locking of the distal end of the drive train and therefore securing theacetabular cup prosthesis 9 against theimpactor body 8. When the clamping handle 5 is in the open position, rotation (3) of thepositioning knob 3 rotates (10) theacetabular cup prosthesis 9. As described below with more details, therelease handle actuator 4 allows disassembling of the clamping handle 5 for easier cleaning and sterilization of the instrument. - In the preferred embodiment, the
impactor body 8 may be C-shaped in order to minimize the invasiveness of the surgery by clearing anatomical structures. The axis of the impactor handle 6 is approximately aligned with the axis of theprosthesis engaging interface 11. It will be noted that different shape of theimpactor body 8 and different offset (width of the C-shape) may be used without deviating from the scope of the present invention. - Now referring to the
FIG. 3 , the cross-section view of the acetabular cup impactor is shown in the clamped position. The distaldrive train shaft 35 has a threadedtip 37 here shown with anacetabular cup prosthesis 9 fully screwed therein. The retaining flange 55 (shown inFIG. 5C ) sits on the internal bottom face of theacetabular cup prosthesis 9 once fully threaded in. The distaldrive train shaft 35, the threadedtip 37 and the retainingflange 55 together form theprosthesis engaging interface 11. Also shown with more details inFIGS. 5A, 5B and 5C , the distaldrive train shaft 35 is engaged into the U-shaped trough of the clampingslide 36. The clampingslide 36, having preferably four slide pins 22 (two on each side), moves along the axis of the distaldrive train shaft 35 by sliding intoslide grooves 21 on internal surfaces of theimpactor body 8. The retainingflange 51 of the distaldrive train shaft 35 contacts the proximal face of the clampingslide 36 and is pulled backward when the clampingslide 36 moves backward. The backward displacement of the distaldrive train shaft 35 pulls theacetabular cup prosthesis 9 against theimpactor nose 38. Once the pulling force has reached a certain level, friction forces between the internal bottom face of theacetabular cup prosthesis 9 and the front face of theimpactor nose 38 prevent the cup prosthesis from moving or rotating. - Referring now to
FIG. 4 , a cross-section view of the acetabular cup impactor is shown in the open position. Note that the acetabular cup prosthesis is not shown in this figure for clarity and to simplify the drawing. The clampingslide 36 is linked to the clamping handle 5 by a clampinglever 31. The three components are linked together with two pins 23 a, 23 b acting as hinges. Eccentric pins may be used (in this embodiment and the further embodiments herein described) to adjust the length of the hinges and therefore the force (tension) of the clamping. The rotation (41) of the clamping handle 5 away from theimpactor body 8 induces movement of the clampinglever 31 which also induces movement of the clampingslide 36. The clampingslide 36 slides frontward (towards the tip of the cup impactor) and therefore releases the pulling force on the distaldrive train shaft 35. The distaldrive train shaft 35 can then be free to move frontward (42) and therefore releasing the friction forces between thecup prosthesis 9 and theimpactor nose 38. In the open position, the distal drive train shaft 35 (and therefore theacetabular cup prosthesis 9 when mounted on the prosthesis engaging interface 11) is free to rotate when thepositioning knob 2 of the drive train is rotated. - The rotation (41) of the clamping handle 5 in the opposite direction, towards the
impactor body 8, induces a backward movement of the clamping slide 36 (towards the handle of the cup impactor) and therefore moves the distaldrive train shaft 35 backward. The backward displacement of the distaldrive train shaft 35 moves theacetabular cup prosthesis 9 against theimpactor nose 38 until they contact each other. The elastic deformation of the clampinglever 31, acting like a spring, ensures a progressive and increasing pulling force on the distaldrive train shaft 35 until the clamping handle 5 has reached its final backward position shown inFIG. 3 . In the preferred embodiment, typical of an over center mechanism, the increase of the force given by the clampinglever 31 reaches a neutral point a little before the clamping handle 5 has reached its final backward position. Exceeding this neutral point, the force will decrease a little but also ensure that the clamping handle 5 stays in position against theimpactor body 8 during impaction shocks. - Referring to
FIG. 5B , a cross-section view of the distal part of the acetabular cup impactor shows theimpactor nose 38 having a C-ring 52 allowing it to be snapped on the distal tip of theimpactor body 8. Theimpactor nose 38 can be further pulled apart from the impactor body for disassembling of thedrive train assembly 71. In a typical situation, the profile of theimpactor nose 38 is be adapted to the inner surface of thecup prosthesis 9. Severalimpactor noses 38 can be provided in a kit in order to accommodatedifferent implants 9. In a further variant not shown in the figure, the distal portion of theimpactor nose 38 may include an anti-rotation feature having a shape (square, hexagonal, etc.) that will match that of thecup prosthesis 9. During clamping, this feature engages into a corresponding feature of thecup 9, and therefore prevents rotation of theimplant FIG. 5C shows the distaldrive train shaft 35, the clampingslide 36 and the clampinglever 31 without theimpactor body 8. - Now referring to
FIG. 6A , the fixation mechanism of the drive train is shown. The proximaldrive train shaft 33 is snapped into the drive train bearing 32. A cross-section view of the drive train bearing 32 having a C-shaped opening with twoelastic retaining lips 61 is shown inFIG. 6B . Once inserted, thedrive train assembly 71, and therefore the proximaldrive train shaft 33, can rotate and axially move into the drive train bearing 32. Two stops 53 and 54 limit the axial displacement of theshaft 33. The drive train bearing 32 is connected to theimpactor body 8 through two bearingpins 24 which allows it to pivot. In the preferred embodiment, the drive train bearing 32 is made out of plastic. - Referring now to
FIG. 7 , a disassembled view of theacetabular cup impactor 1 is shown adapted for easier cleaning and sterilization of the instrument. - Referring now to
FIG. 8 a detailed cross-section of the handle release mechanism is shown. By pulling up (72) therelease handle actuator 4, the release pins 85 connected to the handle actuator clear the pivotinghole openings 73 where thehandle pivoting pins 23 of the clamping handle 5 are maintained. It allows the clamping handle 5 to be disengaged from the impactor body, aided by internally disposedgrooves 21 shown in dashed lines in the figure. Thespring 83 mounted on theshaft 82 moves therelease handle actuator 4 back on its initial down position. The clamping handle 5 and the clampinglever 31 may then be drawn out of the impactor body where thepins 22 exit the internal grooves and free the assembly. In order to avoid losing pieces, the clampinglever 31 stays connected to the clampingslide 36. Theimpactor nose 75 may also be pulled out of theimpactor body 8. It will clear theU-shaped opening 77 which allows the distaldrive train shaft 35 of thedrive train assembly 71 to be removed. The completedrive train assembly 71 may then be drawn out of theimpactor body 8 by pulling on it and unsnapping it from the drive train bearing 32. - For re-assembling the cup impactor, the clamping
lever 31 and the clamping handle 5 are placed back into theimpactor body 8. The handle pivoting pins 23 of the clamping handle 5 are then engaged into the pivotinghole opening 73. This action pushes the release pins 85 up until thehandle pivoting pins 23 are fully engaged into theimpactor body 8. The release pins 85 move then back into their initial position and lock (84) the handle pivoting pins 23. Thedrive train assembly 71 may then be snapped back into the drive train bearing 32 and replaced into theimpactor body 8. Theimpactor nose 75 may also be snapped back onto the distal tip of theimpactor body 8. - Referring now to
FIG. 9A , in a second embodiment, a clampingslide 91 having a concave kidney bean shape is shown. Movement of the clampinglever 31 induced rotation of the clampingslide 91 around the pivotingpin 93. The retainingsection 92 of distaldrive train shaft 94, which slides on the concave face of the clampingslide 91, follows the movement of the clamping slide and is pulled backward. As described above, the backward displacement of the distaldrive train shaft 94 locks the acetabular cup prosthesis against the impactor nose. - Referring now to
FIG. 9B , in a third embodiment, a clampingslide 95 is shown having a convex kidney bean shape. Movement of the clampinglever 31 induced rotation of the clampingslide 95 around the pivotingpin 97. Thespherical retaining section 96 of distaldrive train shaft 98, which slides on the convex face of the clampingslide 95, follows the movement of the clamping slide and is pulled backward. As described above, the backward displacement of the distaldrive train shaft 98 locks the acetabular cup prosthesis against the impactor nose. - Referring now to
FIGS. 10, 11 and 12 a variant of the embodiment ofFIGS. 2, 3 and 4 is shown in which the clamping handle 5′ of the cup impactor l′ is located on the top of theimpactor body 8′. Pulling on the clamping handle 5′ releases the cup 9 (by moving the threadedtip 37 forward), and pushing on the clamping handle 5′ locks the cup 9 (by moving the threadedtip 37 backward). - Referring now to
FIGS. 13 and 14 , different embodiment ofFIGS. 5A and 5C where anadditional retaining section 140 has been added to thedistal drive shaft 35. This retainingsection 140 contacts the distal face of the clampingslide 36′ and is pushed frontward when the clampingslide 36′ moves frontward. The frontward displacement of the distaldrive train shaft 35 moves the cup away from thenose 38. In this embodiment, the clampingslide 36′, having onegroove 22′ on each side, moves along the axis of the distaldrive train shaft 35 by sliding onto the tworails 21′ of theimpactor body 8′. In this embodiment, theimpactor nose 38 has oneflange 130 on each side that contacts the lateral side of the distal end of theimpactor body 8′ in order to prevent it from rotating. - Referring now to
FIGS. 15 to 17 , a further embodiment of theinvention 1″ is shown having additional lever arm stages 160 and 161 which increases leverage and thereby reduces the force required on the clamping handle 5″ to pull or clamp on thecup 9.FIG. 15 shows the side view of thecup impactor 1″ with the clamping handle 5″ in the closed position.FIG. 16 shows a cross section of this side view with the linkage made up of afirst stage lever 160, pivotally connected via apin 31 b to thelever 31″ and to pivot with respect to thehousing 8″ on apin 160 a, and to a secondstage lever arm 161 via apin 160 b. Thesecond stage lever 161 is in turn connected via apin 161 a to the clamping handle 5″. The clamping handle 5″ is pivotally connected to thehousing 8″ viapin 23″. The assembly is shown in cross section in this figure in a lock or clamping position. - Referring in particular to
FIG. 17 , theimpactor 1″ is shown in cross section with the clamping handle 5″ and levers connected thereto, in an open (unlocked or unclamped) position (release of the cup). It is evident that this configuration increases the leverage essentially by the length of the lever arms of lever arm stages 160 and 161 while not dramatically increasing the envelop required to operate the mechanism, thereby saving space while making it easier for the surgeon to clamp and unclamp aprosthesis 9 to theimpactor nose 38. - In an advantage, the
lever clamping handle drive train assembly - The
drive train assembly 71 may be replaced with alternativedrive train assemblies 71′ having an alternativeprosthesis engaging surface 11′ which is readily removable and replaceable. - Referring now to
FIG. 18 , asurgical kit 200 includes: (a) a toolholder sterilization case 202 having compartments for holding elements needed to effect a given surgical intervention; (b) theimpactor drive train assembly additional impactor nose 38′. Thekit 200 may further include: (e) a surgical reamer handle 220 for preparing the acetabulum for aprosthesis 9; and (f) a selection ofacetabular reamers 222 for connection to and operation with the surgical reamer. - In another feature of the invention, the
impactor nose 38 includes ananti-rotation feature 38 b having a shape (of any cross section such as square, hexagon, or polygon) that interfacingly locks against a corresponding feature of acup prosthesis 9. - Referring now to
FIG. 19 , asurgical method 300 of the invention includes several steps. In afirst step 302, theimpactor kit 200 of the invention is provided. In asecond step 304, a suitable cup prosthesis receiving surface on a bone of a patient is prepared through a surgical opening. In athird step 306, a selected cup prosthesis is placed on an end of the impactor. In afourth step 308, when needed, thecup prosthesis 9 is oriented with apositioning knob 2 of the impactor. In afifth step 310, theprosthesis 9 is clamped against animpactor nose 38. In asixth step 312, thecup prosthesis 9 is positioned in a proper orientation against the prepared bone surface by carefully and controllably impacting the impactor so as to advance the prosthesis in a final position against the bone. In aseventh step 314, the impactor is withdrawn and the opening is sterilized and closed. - An advantage of the present invention is to provide a simple device where the
acetabular cup prosthesis 9 may be oriented first with thepositioning knob 2 and then locked in an angular orientation against theimpaction nose 38 by pulling on theclamping handle 5. The connection between the prosthesis is robust as the connection is made without any play or gaps therebetween, ensuring good support during impaction. - Another advantage of the invention is to provide a robust instrument by dissociating the orientation of the prosthesis made with the
drive train assembly 71 and the locking of the prosthesis against the impactor nose. Prior art shows devices where the drive train assembly and its constituting universal joint are used to pull the prosthesis against the impactor nose. Advantageously, the present invention does not put any load on the universal joint when pulling the prosthesis against the impactor nose. - Another advantage of the invention is to provide a
cup impactor prosthesis engaging interface 11, which is part of thedrive train assembly 71, thereby being easily exchangeable in order to match with different prosthesis interfaces. - Another advantage of the invention is to minimize the number of components and the risk that parts could be lost.
- It will be understood that the particular method and devices embodying the invention are shown by way of illustration and not as a limitation of the invention. Although certain illustrative embodiments of the invention have been shown and described here, a wide range of modification, changes and substitutions is contemplated in the foregoing disclosure.
- As will be appreciated by skilled artisans, the present invention may be embodied as a system, a device, or a method.
- Moreover, the system contemplates the use, sale and/or distribution of any goods, services or information having similar functionality described herein.
- The specification and figures should be considered in an illustrative manner, rather than a restrictive one and all modifications described herein are intended to be included within the scope of the invention claimed. Accordingly, the scope of the invention should be determined by the appended claims (as they currently exist or as later amended or added, and their legal equivalents) rather than by merely the examples described above. Steps recited in any method or process claims, unless otherwise expressly stated, may be executed in any order and are not limited to the specific order presented in any claim. Further, the elements and/or components recited in apparatus claims may be assembled or otherwise functionally configured in a variety of permutations to produce substantially the same result as the present invention. Consequently, the invention should not be interpreted as being limited to the specific configuration recited in the claims.
- Benefits, other advantages and solutions mentioned herein are not to be construed as critical, required or essential features or components of any or all the claims.
- As used herein, the terms “comprises”, “comprising”, or variations thereof, are intended to refer to a non-exclusive listing of elements, such that any apparatus, process, method, article, or composition of the invention that comprises a list of elements, that does not include only those elements recited, but may also include other elements such as those described in the instant specification. Unless otherwise explicitly stated, the use of the term “consisting” or “consisting of” or “consisting essentially of” is not intended to limit the scope of the invention to the enumerated elements named thereafter, unless otherwise indicated. Other combinations and/or modifications of the above-described elements, materials or structures used in the practice of the present invention may be varied or adapted by the skilled artisan to other designs without departing from the general principles of the invention.
- The patents and articles mentioned above are hereby incorporated by reference herein, unless otherwise noted, to the extent that the same are not inconsistent with this disclosure.
- Other characteristics and modes of execution of the invention are described in the appended claims.
- Further, the invention should be considered as comprising all possible combinations of every feature described in the instant specification, appended claims, and/or drawing figures which may be considered new, inventive and industrially applicable.
- Additional features and functionality of the invention are described in the claims appended hereto. Such claims are hereby incorporated in their entirety by reference thereto in this specification and should be considered as part of the application as filed.
- Multiple variations and modifications are possible in the embodiments of the invention described here. Although certain illustrative embodiments of the invention have been shown and described here, a wide range of changes, modifications, and substitutions is contemplated in the foregoing disclosure. While the above description contains many specific details, these should not be construed as limitations on the scope of the invention, but rather exemplify one or another preferred embodiment thereof. In some instances, some features of the present invention may be employed without a corresponding use of the other features. Accordingly, it is appropriate that the foregoing description be construed broadly and understood as being illustrative only, the spirit and scope of the invention being limited only by the claims which ultimately issue in this application.
Claims (20)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US15/517,238 US10492927B2 (en) | 2014-10-10 | 2015-10-12 | Cup impactor |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US201462062166P | 2014-10-10 | 2014-10-10 | |
US15/517,238 US10492927B2 (en) | 2014-10-10 | 2015-10-12 | Cup impactor |
PCT/IB2015/001864 WO2016055851A1 (en) | 2014-10-10 | 2015-10-12 | Cup impactor |
Publications (3)
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EP (1) | EP3203942B1 (en) |
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US11639740B2 (en) | 2019-01-25 | 2023-05-02 | Encore Medical, L.P. | Universal joint assembly |
Families Citing this family (12)
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EP3111897B1 (en) * | 2015-07-02 | 2018-11-14 | Greatbatch Ltd. | Orthopedic impactor |
US10470896B2 (en) * | 2015-07-27 | 2019-11-12 | Ren-Hong Huang | Surgical inserter |
FR3059892B1 (en) * | 2016-12-13 | 2021-04-23 | Amplitude | ANCILLARY FOR PLACING A CUPULA FOR COTYLOID IMPLANT FOR TOTAL HIP PROSTHESIS |
CN108272478B (en) * | 2017-01-05 | 2020-11-03 | 黄仁宏 | Implanter for medical devices |
CA3059721A1 (en) * | 2017-07-05 | 2019-01-10 | Wright Medical Technology, Inc. | Anterior ankle approach system and method |
EP3658074A1 (en) * | 2017-07-28 | 2020-06-03 | Boston Scientific Scimed Inc. | Handle with direct drive mechanism |
US11812976B2 (en) | 2017-11-07 | 2023-11-14 | Incipio Devices Sa | Offset reamer driver with remote release mechanism |
DE102019100868A1 (en) * | 2018-09-13 | 2020-03-19 | Mathys Ag Bettlach | Instrument for insertion and a method for fixing a joint implant |
US20200197065A1 (en) * | 2018-12-25 | 2020-06-25 | Ren-Hong Huang | Surgical device and surgical impactor thereof |
USD929589S1 (en) * | 2019-01-18 | 2021-08-31 | Shukla Medical | Surgical striking apparatus |
CN111956372B (en) * | 2020-09-10 | 2023-02-03 | 遵义医科大学附属医院 | Eccentric femoral stem impactor |
US12011203B2 (en) * | 2021-05-07 | 2024-06-18 | DePuy Synthes Products, Inc. | Offset acetabular shell impactor adapter |
Family Cites Families (6)
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JP2002537897A (en) * | 1999-03-03 | 2002-11-12 | スミス アンド ネフュー インコーポレーテッド | Methods, systems and devices for inserting prosthetic implants |
US8398639B2 (en) * | 2005-09-29 | 2013-03-19 | Symmetry Medical Manufacturing, Inc. | Minimally invasive surgical driver |
FR2900328A1 (en) * | 2006-05-01 | 2007-11-02 | Precimed Sa Sa Suisse | Acetabular cup prosthesis holder e.g. impactor, for use by surgeon, has piston maintaining prosthesis against axial movement of prosthesis, and locking mechanism i.e. sleeve, locking lever in position to lock prosthesis against holder head |
WO2012024288A2 (en) * | 2010-08-16 | 2012-02-23 | Smith & Nephew, Inc. | Patient-matched acetabular alignment tool |
EP2561835B1 (en) * | 2011-08-26 | 2016-03-16 | Greatbatch Medical SA | Straight cup impactor |
TW201412281A (en) * | 2012-09-18 | 2014-04-01 | United Orthopedic Corp | Acetabular cup implanting device |
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US11639740B2 (en) | 2019-01-25 | 2023-05-02 | Encore Medical, L.P. | Universal joint assembly |
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EP3203942A1 (en) | 2017-08-16 |
CN106794067B (en) | 2019-07-19 |
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EP3203942B1 (en) | 2018-12-05 |
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