Classifications

• • 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
  • A61F2/40—Joints for shoulders
  • A61F2/4014—Humeral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic humeral shafts
• • 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
  • A61F2/40—Joints for shoulders
  • A61F2/4059—Humeral shafts
• • 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
  • 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
• • 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
  • 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
  • A61F2002/30616—Sets comprising a plurality of prosthetic parts of different sizes or orientations
• • 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
  • A61F2/40—Joints for shoulders
  • A61F2/4014—Humeral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic humeral shafts
  • A61F2002/4029—Necks
• • 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
  • A61F2/40—Joints for shoulders
  • A61F2/4014—Humeral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic humeral shafts
  • A61F2002/4029—Necks
  • A61F2002/4033—Necks with an integral complete or partial peripheral collar at its base
• • 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
  • A61F2/40—Joints for shoulders
  • A61F2/4014—Humeral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic humeral shafts
  • A61F2002/4037—Connections of heads to necks
• • 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
  • A61F2/40—Joints for shoulders
  • A61F2/4014—Humeral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic humeral shafts
  • A61F2002/4044—Connections of necks to shafts
• • 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
  • A61F2/40—Joints for shoulders
  • A61F2/4059—Humeral shafts
  • A61F2002/4062—Proximal or metaphyseal parts of shafts

Definitions

• the present invention relates to a set of assemblable elements for the constitution of a shoulder prosthesis. It is well known to implant a shoulder prosthesis to recreate the shoulder joint, especially following a fracture, comprising a humeral element and a prosthetic head.
• the humeral element has a portion shaped tapered rod, intended to be introduced into the medullary canal of the humerus and proximal mounting means for mounting the prosthetic head.
• the prosthesis may also include a glenoid element to be anchored to the glenoid of the scapula.
• the prosthetic head must be positioned precisely in relation to the scapula in order to obtain muscle tension to recover the normal play of the joint.
• the existing prostheses do not however give complete satisfaction, either that they are limited as to the possibilities of positioning of the prosthetic head that they allow, or that the perfect immobilization of the prosthetic head with respect to the humeral element is not perfectly ensured, is that the determination of the position of the prosthetic head relative to the humerai element is not very easy to achieve.
• the present invention aims to remedy this essential disadvantage, by providing a prosthesis that allows: to present very wide possibilities of positioning the prosthetic head;
• the set of elements concerned comprises, in a manner known per se, at least one humeral element and at least one prosthetic head, the humeral element comprising means of attachment to the humerus, in particular in the form of a tapered rod intended to be introduced into the medullary canal of the humerus, and mounting means for mounting the prosthetic head at a plurality of positions relative to the humeral element.
• said mounting means comprise a planar and circular proximal face of the humeral element and a stud projecting from this face, coaxially with it, this stud being equipped with indexing means, with a peripheral edge inclined at level of its free end, and a gorge built in its periphery;
• the set of elements includes at least one intermediate element, comprising a base and, on one side of this base, a mounting end;
• the base has a circular shape delimited, on the opposite side to the tip, by a flat face, and comprises a cavity arranged coaxially with it, in which are formed indexing means complementary to those that comprises said stud, the cavity being dimensioned to receive said stud in an adjusted manner;
• the base also comprises a groove formed in the wall delimiting the periphery of said cavity, receiving an elastically deformable split ring; this ring normally has a shape such that it extends partially in the groove of the base and partially outside this groove, and can be elastically deformed in the direction of an increase in its diameter so as to be. completely erased in this gorge;
• the mounting piece is integral with said base and is disposed non-coaxially therewith, said tip being shaped to receive and retain the prosthetic head;
• the prosthetic head comprises, at its axis, a receiving cavity of the mounting end; the assembly is such that said intermediate element can be mounted on said humerai element by engagement of said pad in said cavity, in a plurality of angular positions around the axis of the pad and the cavity by the respective indexing means that comprise this stud and this cavity; during this engagement, said inclined peripheral edge comes to perform said elastic deformation of the ring, which allows the passage of this stud beyond the ring; the coming of the respective planar faces of the humerai element and the base in the immediate vicinity of one another coincides with the coming of said groove facing the ring; in this position, the latter returns to its normal shape by elastic return and therefore comes to engage partially within this groove, ensuring the mounting of the intermediate element on the element humerai.
• the prosthesis obtained by the set of elements according to the invention comprises an intermediate element adapted to be mounted in a plurality of angular positions on the proximal end of the humeral element, with the peripheral edge of the base of the intermediate element in coincidence of the peripheral edge of the proximal plane face of the humeral element and coming from the plane face that comprises this intermediate element in contact with the corresponding flat face that comprises the humeral element, and with locking of the stud in the cavity by means of the split ring.
• the set of elements according to the invention thus shaped, makes it possible to form the proximal portion of the humeral component of the prosthesis having a constant shape regardless of the angular position of the intermediate element on the humeral element, with a perfect immobilization of the prosthetic head with respect to the humeral element.
• the set of elements may comprise at least one intermediate element of a first type, the mounting end of which has its axis parallel to the axis of the cavity.
• This intermediate element allows adjustment of the position of the prosthetic head in orbital positions distributed in directions perpendicular to the axis of the stud of the humeral element.
• the set of elements may comprise a plurality of intermediate elements of said first type, whose mounting tips are located, from one intermediate element to another, at different distances from the axis of the cavities of these elements, thus permitting increase the possibilities of adjusting the position of the prosthetic head.
• the set of elements may also comprise at least one intermediate element of a second type, the mounting end of which has its axis forming an angle with the axis of the cavity of this intermediate element.
• This second intermediate element allows adjustment of the position of the prosthetic head in inclination with respect to the axis of the stud of the humeral element.
• the set of elements may comprise several intermediate elements of said second type, whose mounting tips have, from one intermediate element to another, different inclinations with respect to the axis of the cavities, also making it possible to increase the possibilities of adjusting the position of the prosthetic head.
• the set of elements according to the invention may further comprise at least an intermediate element of a third type, combining the characteristics of an intermediate element of said first and said second type, that is to say the axis of the mounting endpiece is both offset relative to the axis of the cavity of this intermediate element and inclined relative to the axis of this same cavity.
• said indexing means consist of grooves arranged in said stud and in said cavity.
• the stud and the cavity may comprise twelve grooves, allowing twelve possible angular positions of an intermediate element with respect to the humeral element.
• the humeral element comprises a reference mark, for example at the median plane of this element, on the outer side, and at least one intermediate element comprises, at the periphery of said base, at least one corresponding mark. at a determined angular position of this intermediate element with respect to the humeral element.
• the determination of a position of the prosthetic head is thus particularly easy to achieve.
• Figure 1 is a partial side view of a humeral element includes this set;
• Figure 2 is an end view, the proximal side, along the axis of a proximal end face that includes this element;
• Figure 3 is a side view of its outer side;
• Figure 4 is a side view of an intermediate element that includes the set of elements;
• Figure 5 is a view of the same element, by its distal side;
• Figure 6 is a side view of another intermediate element that comprises the set of elements;
• FIG. 7 is a partial view, from the side, partly in section, of the intermediate element of FIG. 4 being mounted on the humeral element of FIG.
• FIG. 8 is a partial view of the two elements of FIG. mounting and a prosthetic head connected to them, several possible positions of this head being shown in broken lines;
• FIG. 9 is a partial view, from the side, of the intermediate element of FIG. 6 mounted on the humeral element of FIG. 1 and of the prosthetic head connected to them, several possible positions of this head being shown in broken lines.
• Figure 10 is a view similar to Figure 9, from above; and
• Figures 11 to 13 are views of three alternative embodiments of the aforementioned elements.
• FIGS. 8 to 10 show a shoulder prosthesis 1 comprising a humeral element 2 and a prosthetic head 3.
• the humeral element 2 is shown more particularly by FIGS. 1 to 3 and can receive one or the other of the elements intermediate 5 or 6 shown more particularly in FIGS. 4 and 6.
• the prosthesis 1 may also comprise a glenoid element intended to be anchored to the glene of the scapula.
• the humeral element 2 has a portion 10 in the form of a tapered stem intended to be introduced into the medullary canal of the humerus, which may comprise, as in the example shown, holes 11 for the passage of son holding tuberosities.
• Element 2 has a circular proximal plate, forming a plane and circular proximal face 12, from which protrudes a pad 13, coaxially with it.
• the stud 13 has, at its periphery, a series of twelve grooves delimiting between them radial projections, the assembly forming indexing means.
• the pad 13 also has, substantially at mid-height, a peripheral groove 14, and, at its free end, an inclined peripheral edge 15.
• Figure 3 further shows that the proximal plate has a reference mark 16, printed on its edge, at the center plane of the element 2, on the outer side thereof.
• FIGS. 4 and 5 show a first intermediate element 5 comprising a base 21 and, on one side of this base 21, an endpiece 22 for mounting the head 3.
• the base 21 has a circular shape delimited, on the opposite side to the end piece 22, by a flat face 23, and comprises a cavity 24 arranged coaxially with it. In the wall delimiting the periphery of this cavity are arranged twelve flutes delimiting projections therebetween, the assembly forming indexing means complementary to those that comprises the pad 13.
• the cavity 24 is dimensioned to receive the pad 13 in a controlled manner.
• the base 21 also comprises a groove formed in the wall delimiting the periphery of the cavity 24, receiving a resiliently deformable split ring.
• This ring 25 normally has a shape such that it extends partially in the groove of the base 21 and partially outside this groove, and can be elastically deformed in the direction of an increase in its diameter so as to be completely erased in this throat.
• the tip 22 is integral with the base 21. It has a morse taper shape, and its axis is radially offset from that of the cavity 24 while being parallel to the axis of this cavity.
• FIG. 6 shows the second intermediate element 6, comprising a base 31 and a mounting bit 32 of the head 3.
• the base 31 is almost identical to the base 21; in addition to the latter, it includes marking marks on its edge, intended to cooperate with the mark 16 to identify the different possible angular positions of the element 6 relative to the element 2.
• the tip 32 has the same shape as the tip 22 and allows the same way the mounting of the head 3. Unlike the tip 22, the axis of the tip 32 forms an angle with the axis of the cavity 34 of the element 6. This angle is 9 ° in the example shown.
• the prosthetic head 3, for its part, comprises, at its axis, a cavity for receiving one or the other of the mounting tips 22, 32.
• the set of elements according to the invention is such that one or the other of said intermediate elements 5, 6 can be mounted on the humeral element 2 by engagement of said pad 13 in the corresponding cavity 24, 34, according to a a plurality of angular positions around the axis of the stud 13 and the cavity 24, 34 thanks to the respective indexing means that comprise this stud 13 and this cavity 24, 34; during this engagement, the inclined peripheral edge 15 performs said elastic deformation of the ring 25, which allows the passage of this stud 13 beyond the ring 25; the coming of the respective planar faces 12, 23 of the humeral element 2 and the base 21, 31 in the immediate vicinity of each other coincides with the coming said groove 14 facing the ring 25; in this position, the latter returns to its normal shape by elastic return and therefore partially engages inside this groove 14, ensuring the mounting of the intermediate element 5, 6 on the humer
• the prosthesis obtained by the set of elements according to the invention therefore comprises an intermediate element 5, 6 adapted to be mounted in a plurality of angular positions on the proximal end of the humerai element, with coming from the peripheral edge of the base 21, 31 of this intermediate element 5, 6 in coincidence of the peripheral edge of the proximal plane face 12 of the humeral element and coming from the flat face 23 that comprises this intermediate element 5, 6 in contact with the corresponding flat face that comprises the element humerai 2, and with locking of the stud 13 in the cavity 24, 34 by means of the split ring 25.
• the set of elements according to the invention thus shaped, allows forming a proximal portion e of the humeral component of the prosthesis having a constant shape whatever the angular position of the intermediate element 5, 6 on the humeral element 2, with a perfect immobilization of the prosthetic head 3 with respect to the humeral element 2.
• the intermediate element 5 allows, according to its angular position relative to the element 2, an adjustment of the position of the prosthetic head 3 according to twelve orbital positions distributed over directions perpendicular to the axis of the plot 13.
• FIGS. 9 and 10 show, for their part, that the intermediate element 6 allows, according to its angular position with respect to the element 2, an adjustment of the position of the prosthetic head in inclination with respect to the axis of the stud 13
• FIGS. 1 to 13 show various variants of the respective indexing means that comprise the stud 13 and the cavity 24, 34: "gear-tooth" flutes (FIG. 11), triangular teeth (FIG. 12), or facets ( Figure 13).

Landscapes

• Health & Medical Sciences (AREA)
• Orthopedic Medicine & Surgery (AREA)
• Cardiology (AREA)
• Oral & Maxillofacial Surgery (AREA)
• Transplantation (AREA)
• Engineering & Computer Science (AREA)
• Biomedical Technology (AREA)
• Heart & Thoracic Surgery (AREA)
• Vascular Medicine (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Prostheses (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=37951831

Family Applications (1)

Country Status (4)

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Family Cites Families (5)

• 2006
  • 2006-09-20 FR FR0608202A patent/FR2905850B1/fr not_active Expired - Fee Related
• 2007
  • 2007-09-20 WO PCT/IB2007/003776 patent/WO2008035225A2/fr not_active Ceased
  • 2007-09-20 EP EP07858956A patent/EP2073760A2/de not_active Withdrawn
  • 2007-09-20 US US12/442,229 patent/US20100076561A1/en not_active Abandoned

Non-Patent Citations (1)

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