A glenoid baseplate is provided that has a transverse body and an elongate body. The transverse body has a first side configured to engage scapula bone of a patient, a second side configured to face away from the first side, and a plurality of anchor apertures. The anchor apertures are formed between the first side and the second side. The transverse body also can have an arcuate or circular periphery that has an anterior portion configured to be oriented toward an anterior side of a scapula and a posterior portion that is configured to be oriented toward a posterior side of the scapula. The elongate body is disposed along a longitudinal axis between an end coupled with the first side of the transverse body. The longitudinal axis of the elongate body is off-set from the center of the circular periphery.
A system for sizing the resected surface to provide metaphyseal referencing and to properly guide a tool (180) into a central portion of the canal in the diaphysis. The system can include a sizing feature (164) to approximate the size of the metaphysis. The system can also include a base (102) configured to contact the metaphysis and a guide feature (104) configured to guide the tool along a central portion of the canal in the diaphysis.
A radial head assembly (100) is provided that includes a stem (124), a collar (108), a locking ring (112), and an articular member (116). The stem has a convex articular head on one end thereof. The locking ring has a ring wall (220), which has a ring opening (224). The ring wall has an angular outer surface (228) and a slot (232) configured to permit the ring wall to radially expand. The angular outer surface engages an angular portion of an interior surface (172) of the collar. The articular member and the locking ring define an articular space (120) within the collar. The articular space is configured to receive the convex articular head.
The present disclosure provides a humeral head system having greater flexibility in component selection and arrangement and providing for desired post-operative humerus and scapula position to meet a wide range of patient needs. The humeral head system includes an articular body and a coupler. The articular body includes a coupling portion disposed on a side of the articular body opposite an articular surface. The coupling portion includes a continuous zone of eccentricity adjustment. The coupler portion optionally includes one or more than one discrete position site. The coupler includes a first portion and a second portion opposite the first portion. The first portion is configured to mate with the coupling portion and the second portion is configured to mate with another member of a joint prosthesis. A coupling portion with the continuous range of eccentricity adjustment can be provided on a bone anchor and the eccentricity of another component can be selected by motion of a coupler, such as a tray for reverse humeral systems, along the coupling portion of the anchor.
Various embodiments disclosed herein relate to stemmed and stemless humeral anchors for use in shoulder arthroplasty procedures. The humeral anchor includes a first end (204B), a second end (208B), and an interior surface extending between the first end and the second end. The interior surface is disposed about a recess (216B) disposed between the first end and the second end. The recess is configured to secure a coupling of a shoulder articular body directly to the interior surface.
Various embodiments disclosed herein relate to stemmed and stemless humeral anchors for use in shoulder arthroplasty procedures. The humeral anchor includes a first end (204B), a second end (208B), and an interior surface extending between the first end and the second end. The interior surface is disposed about a recess (216B) disposed between the first end and the second end. The recess is configured to secure a coupling of a shoulder articular body directly to the interior surface.
The invention concerns a method for manufacturing a prosthesis (11) for a fractured long bone of a patient, the method comprising the steps of: A) providing data representative of the fractured long bone, the fractured long bone comprising a diaphyseal fragment (2) comprising a medullary cavity (8); B) based on said data, designing the prosthesis specifically to the patient, the prosthesis comprising a stem part (12) configured to be inserted into the medullary cavity, step B) comprising: a sub-step of choosing, specifically to the patient, a contact zone (40) of the medullary cavity onto which a respective chosen mechanical stress is planned to be applied by the stem part, and a sub-step of designing the stem part so that the stem part may be inserted into the medullary cavity and thus apply the chosen mechanical stress to said contact zone; and C) manufacturing the prosthesis designed at step B).
In one embodiment, a humeral implant is provided that includes a hollow stem and a mounting end. The hollow stem has a sharp distal edge. The mounting end has a mounting hole and a mounting channel disposed about the mounting hole. The mounting hole is configured to receive a tapered projection of an anatomic articular body. The mounting channel is configured to receive an annular projection of a reverse articular body.
A stemless humeral anchor (10) includes a first end (12) configured to be embedded in a proximal portion of a humerus and a second end (14); a mating portion (16) for an articular component; a transversely extending collar (20); and a rotation control feature (22, 22A) for resisting rotation when the stemless humeral anchor is implanted. A void filling protrusion (24) can extend circumferentially from rotation control feature and can include a porous shell (26), in which a void filling component (28) can be disposed. The rotation control feature can comprise arms. One or more arms (22A) can have a larger radial extent than the others (22). A prosthesis assembly includes a base member (104) that has a helical structure (224) and one or more pathways (300). The pathway is accessible from a proximal end and is directed distally through the helical structure. The pathway is located inward of an outer periphery of the helical structure. The pathway extends in a space between successive portions of the helical structure. The prosthesis assembly includes a locking device (108) that has a support member (132) and an arm (110) that projects away from the support member. The arm is disposed in the pathway when the support member is disposed adjacent to the proximal end of the base member. The arm is disposed through bone in the space between successive portions of the helical structure when the prosthesis assembly is implanted.
A patient specific shoulder guide is provided that includes a hub and a plurality of peripheral members. Each of the peripheral members has a peripheral member height dimension between the patient specific contact surface and a side of the peripheral member opposite the patient specific contact surface. At least one of the peripheral members is a low profile peripheral member in which the peripheral height dimension is less than the peripheral height dimension of at least one other of the peripheral members or is less than the hub height.
A radial head assembly (100) is provided that includes a stem (124), a collar (108), a locking ring (112), and an articular member (116). The stem has a convex articular head (128) on one end thereof. The locking ring has a ring wall (220), which has a ring opening (224). The ring wall has an angular outer surface (228) and a slot (232) configured to permit the ring wall to radially expand. The angular outer surface engages an angular portion (176) of an interior surface (172) of the collar. The articular member and the locking ring define an articular space (120) within the collar. The articular space is configured to receive the convex articular head.
This surgical instrumentation assembly is for positioning a shoulder prosthesis, the shoulder prosthesis comprising a patient-specific shoulder implant (5) adapted to fit onto a glenoid cavity (G) of the scapula (S) of a patient. The assembly comprises a patient- specific impacting device (20) having an underside surface (20a) congruent with the glenoid cavity (G) of the scapula (S) of the patient, said underside surface (20a) being provided with protrusions (24) adapted to perforate the cortical bone (C) of the scapula (S) upon impact of the impacting device (20) against the scapula (S) by a one-sided translation movement (F).
A61B 17/16 - Osteoclasts; Drills or chisels for bones; Trepans
A61B 90/00 - Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups , e.g. for luxation treatment or for protecting wound edges
A61B 17/00 - Surgical instruments, devices or methods, e.g. tourniquets
A system for preparing an ankle bone to receive an ankle prosthesis is provided. The system includes a patient specific cutting guide that has an anterior surface, a posterior surface, and at least one cutting feature extending through the guide from the anterior surface. The posterior surface comprising a first protrusion or other member that extends from a first end fixed to the posterior surface to a second end disposed away from the first end of the first protrusion. The posterior surface has a second protrusion or other member that extends from a first end fixed to the posterior surface to a second end disposed away from the first end of the second protrusion. Tire first and second protrusions are spaced apart and have a length such that when the patient specific cutting guide is coupled with first and second bone references, which can include bushings implantable in bones, a clearance gap is provided between the posterior surface and the ankle bone.
A system is disclosed herein for providing a kinetic assessment and preparation of a prosthetic joint comprising one or more prosthetic components. The system comprises a prosthetic component including sensors and circuitry configured to measure a magnitude and a position of an applied load and a joint alignment. The system further includes a remote system for receiving, processing, and displaying quantitative measurements from the sensors. The kinetic assessment measures joint alignment under loading that will be similar to that of a final joint installation. The kinetic assessment can use trial or permanent prosthetic components. Furthermore, adjustments can be made to the magnitude and the position of the applied load and the joint alignment by various means to fine-tune an installation. The kinetic assessment increases both performance and reliability of the installed joint by reducing error that is introduced by elements that load or modify the joint dynamics.
A selectively expanding spine cage has a minimized cross section in its unexpanded state that is smaller than the diameter of the neuroforamen through which it passes in the distracted spine. The cage conformably engages between the endplates of the adjacent vertebrae to effectively distract the anterior disc space, stabilize the motion segments and eliminate pathologic spine motion. Expanding selectively (anteriorly, along the vertical axis of the spine) rather than uniformly, the cage height increases and holds the vertebrae with fixation forces greater than adjacent bone and soft tissue failure forces in natural lordosis. Stability is thus achieved immediately, enabling patient function by eliminating painful motion. The cage shape intends to rest proximate to the anterior column cortices securing the desired spread and fixation, allowing for bone graft in, around, and through the implant for arthrodesis whereas for arthroplasty it fixes to endpoints but cushions the spine naturally.
An insert (100) is disclosed for measuring a parameter of the muscular- skeletal system. The insert (100) can be temporary or permanent. In one embodiment, the insert (100) is prosthetic component for a single compartment of the knee. The insert (100) comprises a support structure (102) and a support structure (104) respectively having an articular surface (106) and a load bearing surface (108). The height of the insert (100) is less than 10 millimeters. At least one internal cavity (606) is formed when support structures (102, 104) are coupled together for housing electronic circuitry (618), sensors (602), and the power source (616). The cavity (606) can be sterilized through a port (612). A membrane (614) is between the port (612) and the cavity (606). A sterilization gas permeates the membrane (614) for sterilizing cavity (606). The membrane (614) prevents ingress of solids and liquids to the cavity (606).
A prosthetic component suitable for long-term implantation is provided. The prosthetic component includes electronic circuitry and sensors to measure a parameter of the muscular-skeletal system. The prosthetic component comprises a first structure having at least one support surface, a second structure having at least one feature configured to couple to bone, and at least one sensor. The electronic circuitry and sensors are hermetically sealed within the prosthetic component. The prosthetic component includes at least on transmissive region. The transmissive region can be located in a region that has exposure to a region outside the joint. The transmissive region can comprise glass. One or more sensors can be used to monitor synovial fluid in proximity to the joint to determine joint health. The transmissive region can be used to support communication between the electronic circuitry and remote system.
A61B 5/11 - Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb
A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
A61B 17/58 - Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or the like
18.
A HERMETICALLY SEALED PROSTHETIC COMPONENT AND METHOD THEREFOR
A prosthetic component suitable for long-term implantation is provided. The prosthetic component measures a parameter of the muscular-skeletal system is disclosed. The prosthetic component comprises a first structure having at least one support surface, a second structure having at least one feature configured to couple to bone, and at least one sensor. The electronic circuitry and sensors are hermetically sealed within the prosthetic component. The sensor couples to the support surface of the first structure. The first and second structure are coupled together housing the at least one sensor. In one embodiment, the first and second structure are welded together forming the hermetic seal that isolates the at least one sensor from an external environment. The at least one sensor can be a pressure sensor for measuring load and position of load.
A knee prosthesis (100) includes a femoral component (102), a tibial component (104), and a coupling component (106) interconnecting the femoral component (102) and the tibial component (104). The tibial component (104) includes ball (108). The femoral component (102) is configured to move relative to the tibial component (104). The coupling component (106) defines an internal cavity (166) including a first spherical end portion (168) and a second spherical end portion (170). The internal cavity (166) is dimensioned to receive the ball (108) of the tibial component (104). The ball (108) is repositioned between the first spherical end portion (168) and the second spherical end portion (170) of the internal cavity (166) upon movement of the femoral component (102) relative to the tibial component (104).
Certain small molecule amino acid phosphate compounds such as phosphoserine and certain multivalent metal compounds such as calcium phosphate containing cements have been found to have improved properties and form an interpenetrating network in the presence of a polymer that contain either an electronegative carbonyl oxygen atom of the ester group or an electronegative nitrogen atom of the amine group as the bonding sites of the polymer surfaces to the available multivalent metal ions.
A61L 24/04 - Surgical adhesives or cements; Adhesives for colostomy devices containing macromolecular materials
A61L 27/44 - Composite materials, i.e. layered or containing one material dispersed in a matrix of the same or different material having a macromolecular matrix
Certain small molecule amino acid phosphate compounds such as phosphoserine and certain multivalent metal compounds such as calcium phosphate containing cements have been found to have improved properties and form an interpenetrating network in the presence of a polymer that contain either an electronegative carbonyl oxygen atom of the ester group or an electronegative nitrogen atom of the amine group as the bonding sites of the polymer surfaces to the available multivalent metal ions. (see above formula)
A method for producing a wear resistant polyethylene medical implant includes forming a medical implant, such as an orthopedic implant, made at least partially of ultra high molecular weight polyethylene (UHMWPE). The polyethylene may be irradiated with gamma ray or e-beam radiation to form free radicals and then crosslinked to eliminate free radicals prior to exposure to oxygen. The so treated bearing surface of the crosslinked polyethylene is then coated with a photoinitiator. Thereafter the bearing material is photocrosslinked with ultra-violet (UV) radiation. The photocrosslinking process can also be applied to non-crosslink UHMWPE.
The present invention relates to a bone cement precursor system that is presented in the form of two shelf-stable pastes which have been terminally sterilized and are held in separate containers during product transport and storage. When the product is used during surgery, these pastes inject to a site of application through a static mixing device by the action of applied injection force. When the two pastes are mixed, they start to react to each other while injecting out. The resulting composition is highly biocompatible, osteoconductive, injectable, rapid setting and bioresorbable, and is useful in connection with bone repair procedures, for example, in the craniomaxillof acial, trauma and orthopedic areas.
An orthopedic prosthetic joint comprising a joint couple having a first bearing surface made of a poly aryl ether ketone (PEAK) and a second joint component having a second bearing made of a polymer that is softer than the PEAK such as UHMWPE the first and second bearing surfaces in sliding engagement with one another.
A method comprising molding a first component from a first feedstock comprising a first material powder and a first binder, molding a second component from a second feedstock comprising a second material powder and a second binder, placing the first component and the second component in physical communication with each other in order to form an assembled component, removing the first binder and the second binder from the assembled component and performing a sintering operation on the assembled component so as to bond the first component and the second component together.
A61B 17/58 - Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or the like
A61B 18/00 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
Disclosed herein is a method of defin-ing a mating surface in a first side of an arthroplasty jig. The mating surface is configured to matingly re-ceive and contact a corresponding patient surface in-cluding at least one of a bone surface and a cartilage surface. The first side is oriented towards the patient surface when the mating surface matingly receives and contacts the patient surface. The method may include: a) identifying a contour line associated with the patient surface as represented in a medical image; b) evaluat-ing via an algorithm the adequacy of the contour line for defining a portion of the mating surface associated with the contour line; c) modifying the contour line if the contour line is deemed inadequate; and d) employ-ing the modified contour line to define the portion of the mating surface associated with the contour line.
A method of generating a computerized bone model representative of at least a portion of a patient bone in a pre-degenerated state, including generating at least one image of the patient bone in a degenerated state; identifying a reference portion associated with a generally non-degenerated portion of the patient bone; identifying a degenerated portion associated with a generally degenerated portion of the patient bone; and using information from at least one image associated with the reference portion to modify at least one aspect associated with at least one image associated the generally degenerated portion. The method may further include employing the model in defining manufacturing instructions for the manufacture of a customized arthroplasty jig. A customized arthroplasty jig may be manufactured according to the above-described method and is configured to facilitate a prosthetic implant restoring a patient joint to a natural alignment.
Disclosed herein is a method of computer generating a three-dimensional surface model of an arthroplasty target region of a bone forming a joint. The method may include: generating two-dimensional images of at least a portion of the bone; generating an open-loop contour line along the arthroplasty target region in at least some of the two-dimensional images; and generating the three-dimensional model of the arthroplasty target region from the open-loop contour lines.
A61B 17/58 - Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or the like
A61B 34/10 - Computer-aided planning, simulation or modelling of surgical operations
A61B 5/055 - Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
An elongated rod (102) for insertion into a bowed canal of a bone such as a femoral medulla of a femur bone, wherein the canal is bowed in one plane. The rod has a longitudinal axis (104) disposed on a first plane and one or more cutouts (112) formed in at least a portion of a length of the rod and on opposite sides of the first plane. The rod is flexible along a second plane which is co-planar with the bowed canal plane and which is disposed on the longitudinal axis and perpendicular to the first plane.
Single use or disposable cutting blocks and methods for utilizing same are disclosed. The blocks are preferably constructed of polymer and/or other suitable low cost and light weight materials. The blocks may be adapted for use with low friction cutting instruments, as well as other such cutting instruments. Several differently sized and configured blocks may be utilized to perform a single surgical procedure. In addition, kits housing one or more such blocks, with or without other instruments are possible.
A device for use on a patient during surgery including a distal portion, a transition portion, and a proximal portion is disclosed. The distal portion is adapted to attach to an implement having a proximal portion. The transition portion is angled toward an anterior direction and a medial direction with respect to the implement, the proximal portion of the handle being connected to the transition portion and extending in a proximal direction substantially parallel to the implement.
A method of producing an orthopedic implant including the steps of building a flat open model of at least a portion of an implant. The flat open model may be built using a selective laser center process. The flat open model preferably includes at least one groove along either a first surface or a second surface of the model. Next a force may be applied to the flat open model at predetermined locations to thereby cause the model to bend and assume a shape similar to a desired result. The now bent model may be resurfaced by either applying additional material such that the bent flat open model assumes the shape of a desired implant or the bent open model may be snap fit to an additional element.
A method of forming an implant having a porous tissue ingrowth structure and a bearing support structure. The method includes depositing a first layer of a metal powder onto a substrate, scanning a laser beam over the powder so as to sinter the metal powder at predetermined locations, depositing at least one layer of the metal powder onto the first layer and repeating the scanning of the laser beam.
The invention is related to a calcium phosphate composition comprising at least one calcium phosphate mineral, at least one reaction retarding agent, at least one binding agent, and at least one sodium phosphate compound, and a calcium phosphate cement comprising a powdered first component comprising stabilized dicalcium phosphate dehydrate containing from about 10 ppm to about 60 ppm of magnesium, a powdered second component comprising a calcium phosphate mineral other than said stabilized dicalcium phosphate dehydrate, and a liquid third component comprising water.
The present invention disclosed a method of producing a three-dimensional porous tissue in-growth structure. The method includes the steps of depositing a first layer of metal powder and scanning the first layer of metal powder with a laser beam to form a portion of a plurality of predetermined unit cells. Depositing at least one additional layer of metal powder onto a previous layer and repeating the step of scanning a laser beam for at least one of the additional layers in order to continuing forming the predetermined unit cells. The method further includes continuing the depositing and scanning steps to form medical implant.
B22F 5/10 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
A three-dimensional porous structure is produced. A first layer of metal powder is deposited and scanned with a beam to form a portion of a plurality of predetermined unit cells. At least one additional layer of metal powder is deposited onto a previous layer and a beam is repeatedly scanned for at least one of the additional layers in order to continue forming the portions of predetermined unit cells. Porosity of the porous structure is varied by forming unit cells in different layers having different shapes or struts of different dimensions or by randomly perturbing vertices of unit cells to randomize their geometries.
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