|Número de publicación||US3922726 A|
|Tipo de publicación||Concesión|
|Fecha de publicación||2 Dic 1975|
|Fecha de presentación||20 Ago 1974|
|Fecha de prioridad||27 Ago 1973|
|También publicado como||DE2440291A1|
|Número de publicación||US 3922726 A, US 3922726A, US-A-3922726, US3922726 A, US3922726A|
|Inventores||Sergio Sandrolini Cortesi, Claudio Trentani|
|Cesionario original||Sergio Sandrolini Cortesi, Claudio Trentani|
|Exportar cita||BiBTeX, EndNote, RefMan|
|Citas de patentes (4), Citada por (59), Clasificaciones (22)|
|Enlaces externos: USPTO, Cesión de USPTO, Espacenet|
United States Patent Trentani et al. Dec. 2, 1975 JOINT PROSTHESIS 3,728,742 4/1973 Averill etal. 128/92 0 x 3,813,699 6/1974 Giliberty l28/92 C X Invenwrs' 3,829,904 8/1974 Ling ct al 3/1912 fis both of Bologna Primary Examiner-Ronald L. Frinks y Attorney, Agent, or FirmGuid0 Modiano; Albert 22 Filed: Aug. 20, 1974 10511 1211 Appl. No.: 498,883
 ABSTRACT  Foreign Application Priority Data A hip joint prosthesis which comprises a cup member A 27 1973 h 1 3477/73 for placement in the acetabulum and configurated exa y ternally after a substantially spherical surface and internally to form a cavity for snap insertion on the A i E spheroidal head of a stem to which it articulated and  Fie'ld 1913 which is positioned in medullar cavity of the thigh 7 5 A bone after removal of the thigh bone epiphysis. The pivot center of said spheroidal head of the stem within the cavity of said cup member is located between the  UNITE S :ZqrENTS center and the spherical outer surface of the cup. 3.722002 3/1973 Charnley 128/92 c x 4 Claims 1 Drawmg Figure US. Patent Dec. 2, 1975 This invention relates to a hip joint prosthesis, i.e. a
prosthesis designed for permanent installation in. a patients body by surgical operation. 1
It is known to use hip joint prosthesis in order to restore an effective degree of deambulatory capabilities in patients affected by processes of the arthrosis type with degeneration and consumption of the joint cartilages or fracture of the thigh bone neck; in both cases the replacement of the thigh bone epiphysis becomes necessary.
The hip prosthesis of conventional design comprises essentially a stem the lower part whereof is inserted and possibly bonded into the medulloid channel of the thigh bone, following the removal of the thigh bone epiphysis, and made to articulate to the acetabulum in the pelvis.
Such known interior surgical appliances may be classed in two groups: a first group comprising a spherical head of solid steel which, being integral with the endomedullary affixing stem, has dimensions compatible with those of the thigh bone head it is conceived to replace, and which articulates directly to the acetabulum, whereas a second group requires replacement of both the joint surfaces, of the thigh bone as well as of the cotyloid cavity; the appliances of the second group differ from the appliances of the first group in that the acetabulum is also involved and covered with a cup of high-density polyethylene, bonded thereto by cementing, thereby the thigh bone component does not rest directly on the articular cartilage of the cotyloid cavity, but instead on the new cotylis of polyethylene.
The prosthesis of the first group involve, due to deambulation and their weight, the wearing out and subsequent breaking of the acetabulum, causing the new epiphysis to penetrate the pelvis within a few years period giving rise to pain, limpness and functional restrictions, whereas for the prosthesis for the second group, which are not subject to the above problem, surgical interventions are required which are more traumatic and thus not recommended, especially when the patients are of old age.
SUMMARY OF THE INVENTION It is an object of the invention to provide a hip joint prosthesis capable to obviate the above difficulties, i.e. prosthesis that is effective in retarding the wearing out and breaking the acetabulum and that does not require surgical operations of a complex and traumatic nature.
Another object of the invention is to provide a hip joint prosthesis having a simple and light structure, easy to manufacture, safe and effective while being of low cost.
According to the present invention a hip joint prosthesis is provided comprising a cup member for placement in an articulating relation in an acetabulum of the pelvis, said cup member having an outer spherical surface and an inner spherical cavity which communicates with the outside through an opening, a femoral insert including a stem for insertion into the femoral bone after removal of the epiphysis thereof and a spheroidal head engaging said spherical cavity through said opening and articulated therein, wherein according to the improvement said spherical cavity is eccentrically located with respect to the outer surface of the cup memher so as to be displaced in a direction diametrically opposite to said opening. g V
DESCRIPTION OF THE DRAWING Further advantages and features of the invention will become more apparent from the following description of a preferred though not exclusive embodiment thereof, and the accompanying exemplary drawing,
wherein: a I v The FIGURE is a partly sectional view of a hip joint prosthesis according to the invention.
DESCRIPTION OE A PREFERRED EMBODIMENT With reference to the drawing, the numeral 1 identifies the cup member of the hip joint prosthesis and the numeral 2 the femoral insert, which will be driven into the diaphysis of the thigh bone: the cup member 1 is advantageously of a plastic material such as thermoplastic polyesters or high density polyehtylene, while for the femoral insert 2 light alloys have proved successful, such as titanium alloys which are oxidation-free.
The cup member 1, has a symmetry of rotation about the axis a and, is shaped so as to have an outer spherical surface whose center is indicated at A. Within the cup member 1 a spherical cavity 4 is provided which communicates externally through an opening 5 which has a frusto-conical inner surface that diverges in a direction outwardly from said cavity and is surrounded by the annular area 3. The center B of the cavity 4 is located on the axis a passing on the center A of the outer surface of the cup member 1.
In the cavity 4, with the aid of a suitable tool, the spheroidal head 6 of the insert 2 can be snap inserted: at connection zone of the head 6, the insert has a reduced cross-section with respect to opening 5 in order to allow for the articulation of the insert within the cavity 4 so that the head 6 is free to rotate in any plane with respect to the endomedullary inphybulum, without however coming apart therefrom.
The lower portion of the insert 1 is constituted by a stem 7, the centerline whereof is b, and which is to be driven and/or bonded into the upper part of the medullary channel of the thigh bone after the removal of the thigh bone epiphysis. The stem 7 is joined to the spheroidal head 6 through an arcuate portion 8: suitably, the arrangement of the insert 2 with respect to cup member 1 will be such as to reproduce as faithfully as possible the angle existing between the dyaphysis and the thigh bone neck. It should be noted that the insert 2 is of a type largely in use for surgical appliances of the second group, and that it is contemplated that the cup member 1 be manufactured in a range of sizes suitable for various applications; with a range of such cup member, since the spheroidal head 6 of the insert has standardized dimensions, it becomes possible, even during the surgical operation the assembling, of hip joint prosthesis adhering as strictly as possible to the characteristics of the thigh bone epiphysis just removed, and this without resorting to a supply of different complete appliances, said supply being costly, or making individually prepared appliances.
Once the stem 7 of the insert has been affixed in the thigh bone dyaphysis, the cup member 1 is placed in cotyloid cavity or acetabulum of the pelvis: thanks to the eccentricity between points A and B, the cup member 1 seats in a position of stable equilibrium since the pivot center B of the head 6 is located between the center A of the outer surface of the cup member and the cotyloid cavity. When deambulating, large relative movements of the head 6 of the stem with respect to the cup member 1 shall correspond to very limited movements of the cupmember l with respect to the cotyloid cavity. Thus, friction between the cup member and the cotyloid cavity is minimized, and wear and breaking of the pelvis are substantially eliminated.
In order to allow for the X-raying of the cup member 1, which is normally of a material impervious to X-rays, close to the area 3 of the head a thin metal wire 9 is provided in a loop configuration.
1. Hip-joint prosthesis comprising a cup member for placement in an articulating relation in an acetabulum of the pelvis, said cup member having a continuously smooth outer spherical surface and aninner spherical cavity which communicates with the outside through an opening, a femoral insert including a stem for insertion into the femoral bone after removal of the epiphysis thereof and a spheroidal head engaging said spherical cavity through said opening and articulated therein, wherein according to the improvement said spherical cavity is eccentrically located with respect to the outer surface of the cup member so as to be displaced in a direction diametrically opposite to said opening.
2. Hip-joint prosthesis as defined in claim 1 wherein said opening has an inner frusto-conical surface that diverges in a direction outwardly from said cavity.
3. Hip-joint prosthesis as defined in claim 2 wherein at the connection area of said spheroidal head to the stem, said stem has a lesser cross-section dimension than that of said opening.
4. Hip-joint prosthesis as defined in claim 2 wherein said cup member has a rotation symmetry about an axis passing through the center of said opening and the centers of said outer surface and inner cavity, the center of said cavity being located on said axis between the outer surface and the center thereof.
|Patente citada||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US3722002 *||17 Ene 1972||27 Mar 1973||Thackray C F Ltd||Acetabular sockets|
|US3728742 *||18 Jun 1971||24 Abr 1973||Howmedica||Knee or elbow prosthesis|
|US3813699 *||15 Ene 1973||4 Jun 1974||Giliberty R||Prosthetic hip joint|
|US3829904 *||22 Sep 1972||20 Ago 1974||Nat Res Dev||Hip joint prostheses|
|Patente citante||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US4044403 *||1 Nov 1976||30 Ago 1977||Howmedica, Inc.||Implantable joint prosthesis|
|US4106130 *||11 Feb 1977||15 Ago 1978||National Research Development Corporation||Endoprosthetic bone joint devices|
|US4378607 *||26 Nov 1980||5 Abr 1983||Wadsworth Thomas G||Elbow replacement prosthesis|
|US4623352 *||7 Mar 1984||18 Nov 1986||Indong Oh||Protrusio cup|
|US4636213 *||24 Ene 1985||13 Ene 1987||Pakiam Anthony I||Implantable prosthesis|
|US4895572 *||25 Nov 1988||23 Ene 1990||Ira Chernoff||Interlocking femoral prosthesis device|
|US5405402 *||14 Abr 1993||11 Abr 1995||Intermedics Orthopedics, Inc.||Implantable prosthesis with radiographic marker|
|US5676146 *||13 Sep 1996||14 Oct 1997||Osteotech, Inc.||Surgical implant containing a resorbable radiopaque marker and method of locating such within a body|
|US7520902 *||24 Mar 2005||21 Abr 2009||Benoist Girard Sas||Prosthetic femoral joint|
|US7785302||6 Mar 2006||31 Ago 2010||C. R. Bard, Inc.||Access port identification systems and methods|
|US7939108||5 Dic 2007||10 May 2011||Osteotech, Inc.||Method of making demineralized bone particles|
|US7947022||7 Abr 2009||24 May 2011||C. R. Bard, Inc.||Access port identification systems and methods|
|US7959615||31 Ene 2008||14 Jun 2011||C. R. Bard, Inc.||Access port identification systems and methods|
|US7959941||12 Ene 2007||14 Jun 2011||Warsaw Orthopedic, Inc.||Bone graft comprising a demineralized bone matrix and a stabilizing agent|
|US8002813||26 Ago 2009||23 Ago 2011||Warsaw Orthopedic, Inc.||Volume maintaining osteoinductive/osteoconductive compositions|
|US8025639||7 Abr 2009||27 Sep 2011||C. R. Bard, Inc.||Methods of power injecting a fluid through an access port|
|US8029482||8 Jun 2010||4 Oct 2011||C. R. Bard, Inc.||Systems and methods for radiographically identifying an access port|
|US8177762||28 Dic 2005||15 May 2012||C. R. Bard, Inc.||Septum including at least one identifiable feature, access ports including same, and related methods|
|US8197474||19 Jul 2011||12 Jun 2012||Warsaw Orthopedic, Inc.||Volume maintaining osteoinductive/osteoconductive compositions|
|US8202259||30 Oct 2009||19 Jun 2012||C. R. Bard, Inc.||Systems and methods for identifying an access port|
|US8257325||20 Jun 2008||4 Sep 2012||Medical Components, Inc.||Venous access port with molded and/or radiopaque indicia|
|US8268008||19 Jul 2006||18 Sep 2012||Warsaw Orthopedic, Inc.||Osteoimplants and methods for their manufacture|
|US8382723||13 Jun 2011||26 Feb 2013||C. R. Bard, Inc.||Access port identification systems and methods|
|US8382724||30 Sep 2011||26 Feb 2013||C. R. Bard, Inc.||Systems and methods for radiographically identifying an access port|
|US8475417||7 Abr 2009||2 Jul 2013||C. R. Bard, Inc.||Assemblies for identifying a power injectable access port|
|US8529962||20 Ene 2011||10 Sep 2013||Warsaw Orthopedic, Inc.||Method of making demineralized bone particles|
|US8545460||25 Abr 2006||1 Oct 2013||C. R. Bard, Inc.||Infusion apparatuses and related methods|
|US8545864||5 Jul 2007||1 Oct 2013||Warsaw Orthopedic, Inc.||Hemostatic bone graft|
|US8585663||29 Mar 2013||19 Nov 2013||C. R. Bard, Inc.||Access port identification systems and methods|
|US8603052||25 Feb 2013||10 Dic 2013||C. R. Bard, Inc.||Access port identification systems and methods|
|US8608713||14 May 2012||17 Dic 2013||C. R. Bard, Inc.||Septum feature for identification of an access port|
|US8641676||3 Abr 2012||4 Feb 2014||C. R. Bard, Inc.||Infusion apparatuses and methods of use|
|US8641688||2 May 2013||4 Feb 2014||C. R. Bard, Inc.||Assemblies for identifying a power injectable access port|
|US8663672||21 Sep 2005||4 Mar 2014||Warsaw Orthopedic, Inc.||Osteoimplant and method of making same|
|US8679187||18 Oct 2006||25 Mar 2014||Smith & Nephew, Inc.||Acetabular cup assembly for multiple bearing materials|
|US8715244||7 Jul 2010||6 May 2014||C. R. Bard, Inc.||Extensible internal bolster for a medical device|
|US8722075||26 Oct 2009||13 May 2014||Warsaw Orthopedic, Inc.||Compositions and methods for promoting bone formation|
|US8753689||9 Sep 2013||17 Jun 2014||Warsaw Orthopedic, Inc.||Method of making demineralized bone particles|
|US8805478||7 Abr 2009||12 Ago 2014||C. R. Bard, Inc.||Methods of performing a power injection procedure including identifying features of a subcutaneously implanted access port for delivery of contrast media|
|US8852160||16 Jul 2012||7 Oct 2014||Medical Components, Inc.||Venous access port with molded and/or radiopaque indicia|
|US8932271||13 Nov 2009||13 Ene 2015||C. R. Bard, Inc.||Implantable medical devices including septum-based indicators|
|US8939947||25 Feb 2013||27 Ene 2015||C. R. Bard, Inc.||Systems and methods for radiographically identifying an access port|
|US8998860||15 Jun 2012||7 Abr 2015||C. R. Bard, Inc.||Systems and methods for identifying an access port|
|US9079004||1 Nov 2010||14 Jul 2015||C. R. Bard, Inc.||Overmolded access port including anchoring and identification features|
|US9248268||9 Ago 2012||2 Feb 2016||C. R. Bard, Inc.||Overmolded access port including anchoring and identification features|
|US20050071015 *||26 Abr 2002||31 Mar 2005||Ronald Sekel||Acetabular prosthesis assembly|
|US20050228502 *||24 Mar 2005||13 Oct 2005||Benoist Girard Sas||Prosthetic femoral joint|
|US20080108949 *||8 Nov 2007||8 May 2008||C. R. Bard, Inc.||Resource information key for an insertable medical device|
|US20090156928 *||7 Nov 2008||18 Jun 2009||C. R. Bard, Inc.||Radiopaque and septum-based indicators for a multi-lumen implantable port|
|US20090204072 *||7 Abr 2009||13 Ago 2009||C. R. Bard, Inc.||Access port identification systems and methods|
|US20100121283 *||13 Nov 2009||13 May 2010||C. R. Bard, Inc.||Implantable medical devices including septum-based indicators|
|US20100268165 *||21 Oct 2010||C. R. Bard, Inc.||Systems and methods for radiographically identifying an access port|
|US20110009828 *||7 Jul 2010||13 Ene 2011||C.R.Bard, Inc.||Extensible internal bolster for a medical device|
|US20110118677 *||19 May 2011||C. R. Bard, Inc.||Overmolded access port including anchoring and identification features|
|USD676955||30 Dic 2010||26 Feb 2013||C. R. Bard, Inc.||Implantable access port|
|USD682416||30 Dic 2010||14 May 2013||C. R. Bard, Inc.||Implantable access port|
|EP1839622A2||15 Sep 1997||3 Oct 2007||Osteotech, Inc.,||Surgical implant containing a resorbable radiopaque marker|
|EP2260790A2||15 Sep 1997||15 Dic 2010||Osteotech, Inc.||Surgical implant containing a resorbable radiopaque marker|
|WO1998010712A1||15 Sep 1997||19 Mar 1998||Osteotech Inc||Surgical implant containing a resorbable radiopaque marker|
|Clasificación de EE.UU.||623/22.15|
|Clasificación internacional||A61F2/32, A61F2/34, A61F2/00, A61F2/36, A61F2/30|
|Clasificación cooperativa||A61F2002/30065, A61F2/3662, A61F2002/345, A61F2002/3493, A61F2002/30378, A61F2002/365, A61F2002/3611, A61F2210/0071, A61F2/36, A61F2220/0033, A61F2002/30662, A61F2002/3208, A61F2250/0098, A61F2310/00023, A61F2002/3008|