Source: http://www.google.es/patents/US7846206?dq=flatulence
Timestamp: 2013-05-23 10:28:15
Document Index: 131213748

Matched Legal Cases: ['application No. 04', 'arts 28', 'arts 128', 'art 128', 'art 128', 'art 130', 'Application No. 04', 'Application No. 05']

Patente US7846206 - Methods and apparatuses for bone restoration - Google PatentesB�squeda Im�genes Maps Play YouTube Noticias Gmail Drive M�s » B�squeda avanzada de patentes | Historial web | Iniciar sesi�n B�squeda avanzada de patentesPatentesMethods and apparatuses for restoration of human or animal bone anatomy, which may include introduction, into a bone of an expansible implant capable of expansion in a single determined plane, positioning the expansible implant in the bone in order to correspond the single determined plane with a bone...http://www.google.es/patents/US7846206?utm_source=gb-gplus-sharePatente US7846206 - Methods and apparatuses for bone restoration N�mero de publicaci�nUS7846206 B2Tipo de publicaci�nConcesi�n N�mero de solicitud11/150,676 Fecha de publicaci�n7 Dic 2010 Fecha de presentaci�n9 Jun 2005 Fecha de prioridad9 Jun 2004Tambi�n publicado comoCA2567274A1CN101031259AEP2572680A1US20050278036US20060004455US20110046739WO2005120400A2WO2005120400A3 InventoresJean-Fran�ois OglazaChristian RenaudAlain LeonardGildas Huet Cesionario originalVexim Sas Clasificaci�n de EE.UU.623/17.11606/246 Clasificaci�n internacionalA61F2/00A61F2/44A61B17/70A61F2/30A61F2/46A61F2/02A61F2/28 Clasificaci�n cooperativaA61F2002/4629A61F2220/0091A61F2/44A61F2/4611A61F2002/30617A61F2002/30601A61B17/70A61F2002/30556A61F2002/30471A61F2002/4627A61F2002/30579A61F2002/30772A61B17/8858A61F2310/00023A61F2230/0069A61F2250/0009A61F2002/4635A61F2002/30224A61F2002/30774 Clasificaci�n europeaA61F2/44A61F2/46B7A61B17/88C2DReferenciasCitas de patentes (92)Otras citas (3) Citada por (1)Enlaces externosUSPTO Cesi�n de USPTO EspacenetMethods and apparatuses for bone restorationUS 7846206 B2 Resumen Methods and apparatuses for restoration of human or animal bone anatomy, which may include introduction, into a bone of an expansible implant capable of expansion in a single determined plane, positioning the expansible implant in the bone in order to correspond the single determined plane with a bone restoration plane and opening out the expansible implant in the bone restoration plane. A first support surface and a second support surface spread tissues within bone. The embodiments of the invention may also include injecting a filling material around the implant.
first and second opposed plates respectively forming first and a second bearing surfaces for the bone, wherein the first and second plates move away from one another according to the single plane of expansion at the time of the expansion of the implant;
first and second implant ends substantially aligned along a longitudinal axis of the implant, wherein the first implant end includes an opening for allowing engagement of the implant with an implant carrier;
at least one pair of first and second supports, wherein each support of a pair of supports includes a first end connected to the first or second plate and a second end connected to the first or second implant ends; and
a first material web provided between each respective support and the corresponding plate the support is connected to, and
a second material web provided between each respective support and the corresponding implant end the support is connected to, wherein
each material web plastically deforms during expansion of the implant to control expansion of the implant, and wherein each material web comprises a reduced thickness portion of a respective support.
2. A method for restoration of human or animal bone anatomy, comprising:
at least one plate forming a bearing surface for bone, wherein upon expansion of the implant, the plate is directed away from a longitudinal axis of the implant according to the single plane of expansion at the time of the expansion of the implant;
first and second implant ends substantially aligned along the longitudinal axis of the implant, wherein the first implant end includes an opening for allowing engagement of the implant with an implant carrier;
at least one support connected to at least one plate and at least one implant end; and
a zone of material provided between the at least one support and at least one of the at least one plate and the at least one implant end, wherein
the zone of material plastically deforms during expansion of the implant for controlling the expansion of the implant, and wherein the zone of material comprises a reduced thickness portion of a respective support;
expanding the implant in the bone restoration plane.
CROSS REFERENCE TO RELATED APPLICATIONS This application is a continuation-in-part of U.S. patent application Ser. No. 10/951,766 filed on Sep. 29, 2004, which claims priority to French patent application No. 04 06211 filed on Jun. 9, 2004, the entire disclosures of which are hereby incorporated by reference.
FIELD OF THE INVENTION The present invention relates to the field of surgery and medical implants and more particularly to devices and methods for restoring human or animal bone anatomy using medical bone implants.
BACKGROUND OF THE INVENTION Various causes can be at the root of bone compression, in particular osteoporosis which causes (for example) natural vertebral compression under the weight of the individual, but also traumas, with the two causes occasionally being combined. Such bone compressions can affect the vertebrae but also concern other bones, such as the radius and the femur, for example.
SUMMARY OF THE INVENTION Embodiments of the present invention reduce the above noted disadvantages and provide additional advantages over the prior art devices of bone restoration. More particularly, some embodiments of the present invention include methods for restoration of human or animal bone anatomy, and include one or more of the following steps:
introduction, into a bone for restoring, of an expansible implant according to a single determined expansion plane which is preferably intrinsic to the implant, positioning the expansible implant in the bone in order to make the expansion plane correspond with a bone restoration plane, opening out the expansible implant in the bone restoration plane, and injecting a filling material in an around the implant. The method, according to some embodiments of the invention, allows the creation of a reinforced structure resulting in a solid structure (i.e., the implant incorporated by a hardened filling material thanks to the expansion of the implant). Moreover, the filling material can be injected under relatively low pressure since the implant remains in place which enables the preservation of the dimensions of the corrected bone structure.
Another advantageous feature of an embodiment of the present invention includes the opening out of the expansible implant by opening out first and second opposite plates, forming (respectively) first and a second support surfaces for the bone. Such a feature allows the pressure which is exerted by the implant on the tissues in contact with the latter to be reduced, by increasing the contact or support surface on the tissues.
The length of the implant may also be sized to be substantially equal to at least one of the first and second support surfaces in the bone. Such a feature allows optimization of a ratio of the support length on the tissues to the length of the implant. For example, the closer this ratio is to one, the more the implant will be usable in places requiring a small length. Moreover, this feature also allows the introduction of a filling material with low injection pressure�in one embodiment, the injection pressure is the lowest possible so as to avoid having the filling material be injected into inappropriate tissues such as blood vessel walls (for example).
In another embodiment of the present invention, the opening out of first and second plates includes raising the latter using one or more supports under the plates. Such a feature allows a ratio of the length of the support surfaces to the length of the implant to be increased to be as close to one (1) as possible, as will be explained in more detail further on with the description of an embodiment of the invention. Furthermore, this feature allows thrust forces to be distributed under the plate in order to reduce the cantilever.
Another embodiment of the invention is directed to a medical insertion device for inserting an expansible implant into a patient. The device may include a gripping portion having a central bore, a first tube housed in the central bore, a threaded rod housed in the first tube having a distal end for receiving an implant for insertion into the patient, a handle attached to the gripping portion and/or the implant carrier and a gauge for determining an expansion of the implant.
BRIEF DESCRIPTION OF THE FIGURES FIG. 1A illustrates a perspective view of one embodiment of an expansible implant according to the invention, in a resting position.
DETAILED DESCRIPTION OF THE EMBODIMENTS The expansible implant 1 represented in FIGS. 1A to 7 may include one or more of the following:
a single determined expansion plane 2, which may be intrinsic to the implant, means 3 for positioning the expansible implant in the bone allowing the expansion plane to correspond with a bone restoration plane, means 4 for opening out the expansible implant in the single expansion plane 2, means 5 for controlling a determined expansion value, between a minimum thickness A of the implant before any expansion of the latter and a maximum thickness B of the implant after its maximum expansion, and a first 6 and a second 7 opposite plate which are able to form respectively a first 8 and a second 9 support surface in the bone intended to be moved apart one from the other along the single expansion plane 2 during expansion of the implant 1. As shown in FIGS. 1A and 1B, implant 1 may include a cylindrical shape with a transverse circular exterior section, and can be manufactured of biocompatible material, for example titanium, into a tubular body using lathe, laser, and/or electro-erosion manufacturing techniques (cast manufacturing may also be used). The implant 1 may also include a first end 20 and a second end 21, each respectfully adopting the shape of a transverse section of the tubular body. The ends are preferably intended to be brought towards one another to allow the opening-out/expansion of the implant, as represented in FIGS. 1B and 2B. Accordingly, the two ends 20, 21 are connected to each other by a first 22 (which also may be referred to as �upper� arm) and second 23 (which also may be referred to as �lower� arm) rectilinear arm, which are parallel when the implant is not opened out and formed longitudinally in the tubular body, and are able to be folded under the first 6 and second 7 opposite plates as an effect of bringing the ends 20 and 21 one towards the other, while also distancing the first 6 and second 7 opposite plates from the longitudinal axis 10 of the tubular body.
FIGS. 2A-2C illustrate an embodiment of the implant which is similar to the embodiment disclosed in FIGS. 1A and 1B, but with an additional set of supports (e.g., a four bar linkage). More specifically, the implant in FIGS. 2A-2C includes supports 12A, 12B, 13A, 13B, 14A, 14B, 15A, and 15B. The additional supports may provide further rigidity for the implant and/or may insure that plates 6 and 7 open-out in a substantially parallel and/or even manner.
Thus, according to some embodiments of the present invention, the articulations betwen the upper 22 and lower 23 arms and corresponding rigid parts are preferably formed by weakened zones produced by grooves 81. The grooves define a thin web of material (i.e., material web) formed from the tubular body, the thickness of which may be determined by the depth of the grooves 81 (as represented in the figures) in order to allow plastic deformation of the material without breaking. Specifically, the rigid parts 28 and 32 of the upper arm 22, and their symmetrical ones on the lower arm 23, can adopt a position, termed extreme expansion, in which the intended rigid parts are perpendicular to the longitudinal axis 10 of the implant 1, when the ends 20 and 21 are brought one towards the other such that the latter is opened up until its maximum expansion capacity, resulting in plastic deformation of the corresponding material. The width of the grooves 81 are preferably pre-determined to allow such a clearance of the parts of the upper and lower arms and also to impart a suitable radius of curvature to the webs in order to ensure plastic deformation without rupture of the material.
The represented implant 101 differs from the implant 1 by the absence of the wing portion on the plates 106 and 107, as represented more particularly in FIG. 9. Implant 101 includes a deformable parallelogram system 141 on one of the rigid parts 128 or 132 of each of the arms 122 (upper) and 123 (lower). In the illustrated example, the parallelogram system is represented on rigid part 128 of upper arm 122, connected to the end 120 and the corresponding system on lower arm 123. The parallelogram systems may be used to ensure displacement of the plates of each of the arms 122 and 123, parallel to longitudinal axis 110 of the implant. As represented in the figures, the rigid part 128 of the arm 122 (similarly on corresponding arm 123) is split, as are articulations 131 and 129 (respectively) over the central part 130 and over the end 120 of the implant in order to form a parallelogram which is deformable during displacement of the corresponding plate.
A proximal end of the implant 1 is removably attached to a distal end of a hollow core (preferably) implant carrier 71 which is then introduced into the core of tube 67, as represented in FIG. 23. The implant may be removably affixed to the implant carrier via threaded engagement (for example). Within the core of the implant carrier 71, a rod 72 (see also FIG. 33, reference numeral 3316) having a distal end which includes an engagement means to engage the distal end of the implant (and which may also include an expanded proximal end, larger than a diameter of the rod) may be inserted. Similar to the affixation of the implant to the implant carrier, the engagement means of the rod to the implant my be via threaded engagement.
The handle 3314 is then rotated to �pull� the rod away from the implantation area. Since the proximal end of the implant is butted up against the implant carrier, and pulling on the rod causes the distal end of the implant to move toward the proximal end (or visa-versa). This results in the ends of the implant drawing towards each other which opens out the implant. More specifically, opposite plates 6 and 7 are opened out, advantageously forming, respectively, a first 8 and a second 9 support surface in the vertebra 60, which surfaces may be continuous over their length which may be substantially equal to the length of the implant 1 (FIG. 25). In the course of the expansion, control of the reduction of the fracture thanks to the millimetric control means, and after having obtained the desired expansion, for example of a determined value between a minimum thickness of the implant before any expansion of the latter and a maximum thickness of the implant after its maximum expansion, then freeing of the implant carrier 71 by unscrewing it from the implant 1, then extraction of the tube 67, as represented in FIG. 26, with the implant in opened-out position remaining in place in the vertebra 60.
Accordingly, the expansion of the implant in the vertebra is achieved by support under the plates allowing the thrust force to be distributed over the length of the plates under the latter. Thus a sufficient length of the plates may be provided while limiting an excessive dimensioning of the thickness of the latter in order to resist flexion. It will be appreciated by those of ordinary skill in the art that the implant according to some embodiments of the invention adopt a ratio of a spatial requirement in length (un-expanded) to length of elevated plate which is extremely optimized, allowing a preferable use of the limited intra-osseous spaces with a view to fracture reduction, for example.
The rod 3316 may also include, according to one of the embodiments of the invention, a disengagement means, which may comprise an internal hex on the proximal end 3318 of the rod. This may allow one to disengage the rod from the implant once the implant has been opened out. Alternatively, where the handle is not attached to the gripping block and/or implant carrier, the handle could be counter-rotated (i.e., rotated such that the rod does not move in a direction away from the implant) such that it travels away from the flush portion of the gripping block and implant carrier, such that it engages the proximal end of the rod. Further counter-rotation of the handle (after opening out of the implant) causes the rod to rotate in the same counter-rotation as the handle, thereby causing the rod to disengage from the implant. Depending upon the determined thread pitch, such disengagement can occur in any number of rotations (e.g., less or more than one rotation). See also FIG. 26 Preferably, after the rod has been removed, a filling material 74 is injected around the implant. The filling material may comprise, for example, an ionic cement, in particular, a phosphocalcic cement, an acrylic cement or a compound of the latter, with a view to filling in and around the implant. To accomplish this, a needle of the injector 73 is slid down tube 67 until the end of the needle reaches the distal orifice 39 of the implant 1 (FIG. 27). The filling material is then injected via the needle. Continued injection in a retrograde manner may be done up to a proximal orifice in cortical bone 64 of the vertebra 60 (FIG. 28). The needle of the injector may then be withdraw from tube 67 (FIG. 29).
A second example of a method according to an embodiment of the invention for restoration of human bone anatomy, will now be described with references to FIGS. 30-32. This example generally concerns a method for bone restoration of a vertebra by a transpedicular route, with fracture reduction.
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Citada por Patente citante Fecha de presentaci�n Fecha de publicaci�n Solicitante T�tuloWO2012137031A17 Abr 201111 Oct 2012Vexim SasExpandable orthopedic deviceGirarImagen originalP�gina principal de Google - Sitemap - Descargas masivas de USPTO - Pol�tica de privacidad - Condiciones de servicio - Acerca de Google Patentes - Danos tu opini�nDatos proporcionados por IFI CLAIMS Patent Services©2012 Google