147 results about "Prosthesis Implantation" patented technology

According to the invention, the system enables a preoperative study to be carried out wherein the tibia and/or femur is modelled on a computer (6) in 3D, the ideal cutting plane is defined and the position of the resection instruments (1, 2, 3) used to cut the bone is modelled. Additionally, according to the invention, the system enables redefinition of the ideal cutting plane and the positioning and orientation of the resection instruments (1, 2, 3) on the tibia and/or femur, in such a manner that the plane of the slot (4) of the cutting guide (3) through which the cutting tool is introduced coincides with the ideal cutting plane.

A selected augment, shown as a tibial augment, is secured at an augmentation location on a prosthetic implant component, shown as a tibial implant component, by a securing element assembled with the body of the augment for displacement relative to the augment body to selectively engage an abutment located on a depending structure of the implant component, adjacent the augmentation location, so as to establish a securing force between the securing element and the depending structure for urging the augment against the implant component, and thereby secure the augment to the implant component at the augmentation location. In the tibial augment, a distal surface includes surface portions extending in anterior-posterior directions and oriented essentially normal to medial-lateral directions.

A prosthesis and a method for repairing a tissue or muscle wall defect, such as an inguinal hernia, near a cord-like structure, such as the spermatic cord. The prosthesis comprises a layer of repair fabric having a cord opening therethrough that is adapted to receive the cord-like structure when the prosthesis is implanted at the repair site. The prosthesis also includes a cord protector that is attachable to the repair fabric at the opening to isolate the cord-like structure from the fabric in proximity to the opening. The repair fabric may be formed from a material which is susceptible to the formation of adhesions with sensitive tissue and organs. The cord protector may be formed from material which inhibits the formation of adhesions with sensitive tissue and organs. The cord protector may overlie a portion of at least one of the first and second surfaces of the repair fabric. The cord protector may extend substantially farther away from the opening edge on one of the first and second surfaces than on the other of the first and second surfaces. The cord protector may be configured as an insert that is separate from and attachable to the repair fabric. Alternatively, the cord protector may be integral with the repair fabric to form a composite prosthesis.

A kit (100) for use in performing joint arthroplasty on a head of a long bone (4) is provided. The kit (100) includes a first trial (102) including a first trial articulating surface (106) and an opposed first trial mounting surface (108) having a first trial location feature (110). The kit (100) also includes a second trial (104) including a second trial articulating surface (112) and an opposed second trial mounting surface (114) having a second trial location feature (116). The first trial articulating surface (106) and the second trial articulating surface (112) have different geometries and the first trial location feature (110) and the second trial location feature (116) have substantially identical geometries whereby different trials may be used with a common location feature.

A method of computer aided treatment planning is performed by generating and manipulating a three dimensional (3D) image of a region which includes at least one anatomical structure for which treatment, such as surgery, biopsy, tissue component analysis, prosthesis implantation, radiation, chemotherapy and the like, is contemplated. A virtual intervention, which simulates at least a portion of the contemplated treatment, is performed in the 3D image. The user can then determine the effect of the intervention and interactively modify the intervention for improved treatment results. Preferably, a warning is automatically provided if the intervention poses a risk of detrimental effect. The user can navigate through the contemplated region in the 3D image and assess the results. The treatment plans can be saved for comparison and post treatment evaluation.

A prosthesis containing a rupture indicator is disclosed, which includes an indicator lumen enclosed by an indicator lumen envelope made of at least one layer of elastomer containing therein a biologically compatible chemical indicator and a carrier medium; and at least one implant lumen enclosed by an implant lumen envelope made of at least one layer of elastomer, disposed within the indicator lumen. The implant lumen contains therein an implant filling material. Also disclosed is a single lumen prosthesis which includes an envelope made of elastomer containing therein an implant filling material and a biocompatible chemical indicator in a carrier medium. Further disclosed is a method of detecting rupture of a prosthesis, which includes surgically implanting the prosthesis containing a biologically compatible chemical indicator in a desired location of a patient's body and monitoring a change of a body excretion or secretion for indication of prosthesis rupture.

The invention, for reducing a stress shielding effect after prosthesis implantation, proposes a host bone stress environment based custom prosthesis optimization design method. Three criteria, namely, the strength, the surrounding bone stress and the interface micro-motion between a prosthesis and a bone, in prosthesis elastic modulus optimization calculation are proposed, and the mechanical property of the host bone and a personalized kinematic input are considered in optimization; the prosthesis elastic modulus distribution is optimized through finite element software to achieve the purpose of optimizing a porous structure in the prosthesis; and for the designed prosthesis, on the premise of meeting the strength requirement, the stress shielding effect after implantation is reduced and the service life of the prosthesis after implantation is prolonged.

The present invention provides improved methods, kits, and compositions for enhancing bone, cartilage and cartilage repair, bone and prosthesis implantation, and attachment and fixation of cartilage and cartilage to bone or other tissues, and chondrocyte proliferation composing the administration of an effective amount of angiotensinogen, angiotensin I (AI), AI analogues, AI fragments and analogues thereof, angiotensin II (AII), AII analogues, AII fragments or analogues thereof or AII AT₂ type 2 receptor agonists.

A prosthesis implantation inserter is used with a flexible acetabular cup which has an opening or openings in its peripheral rim. The inserter has engagement elements which in an operational position frictionally engage the opening or openings in the flexible cup rim. A release is provided which can be operated to withdraw the engagement element from the opening or openings. When the cup is held §in position it can be guided and inserted into the acetabulum and impacted. Once the position of the prosthesis satisfies the surgeon the engagement element can be removed by operating the release and the cup inserter is removed without any risk of compromising the position or the stability of the implant.

The invention discloses a method for treating surface pores of artificially implanted prosthesis and particularly to a method for preparing a prosthesis with a tantalum coating. The method comprises: preparing a tantalum microporous coating, which may has different surface porosities, on the surface of the part, to be implanted in a bone, of the prosthesis by selecting spraying powers of 25, 30, 35 and 40kW respectively under the conditions of a spraying distance of 100 to 150 millimeters and a powder feeding rate of 70 to 80 grams per minute, wherein the thickness of the tantalum microporous coating is 30 to 300, and the porosity is between 20 and 50 percents; and the substrate of the prosthesis is made of stainless steel 00Cr18Ni14Mo3 or 00Cr18Ni15Mo3N, titanium ( Ti), a titanium alloy Ti-6Al-4A or a C-Cr-Mo alloy (Co30Cr6Mo0.35C) material. The method aims to make the coating of the prosthesis high reliably in bonding strength and high selectable in surface porosity and to reduce the adverse factors which influence the stability of the prosthesis after the prosthesis is implanted. Thus, the anchoring area of the bone and the prosthesis can be increased, preconditions are created for the growth of the newly born bone tissues toward the inside of the pores, the loosening and dislocation of the prosthesis are avoided and the immobilization effect and the service life of the prosthesis are ensured.

A joint resurfacing prosthetic implant system is disclosed having an anatomically-shaped implant to replace a joint at a pedal digit or finger, including a head having an elliptical bearing surface disposed for engaging the end of an adjacent bone and a seating surface opposite the bearing surface, an elongated stem extending distally from the seating surface, and a flange on the circumference of the device and extending distally from the seating surface. The flange includes one or more portals and a removed section configured to avoid impinging upon a tendon during and after implantation of the prosthetic. A specialized tool is also provided to facilitate the resection of the bone for implantation. The specialized tool includes an elliptical template having a cutting edge and a center insert that is sized and configured to match a reamer used to bore into the bone for insertion of the implant.

A coated stent or intra-luminal prosthesis containing a MAP kinase inhibitor controls, reduces, or prevents restenosis, inflammation, and complications associated with stent or intra-luminal prosthesis implantation and/or cardiovascular disease.

The invention discloses a personalized minimally-invasive knee joint positioning guide plate used for knee arthroplasty and manufactured on the basis of medical image three-dimensional reconstruction and computer-aided design technologies, 3D (three-dimensional) printing or other machining methods, and particularly relates to accurate determination of a positioning joint surface. Firstly, a patient skeleton model is reconstructed on the basis of a two-dimensional medical image; preoperative planning is performed on the reconstructed model, and important parameters such as a lower extremity force line, a femoral rotation axis and an osteotomy reference point are determined to simulate osteotomy and prosthesis implantation; a positioning sheet (single positioning type and composite type) is determined and designed with the results. The positioning sheet is used for positioning with a local positioning principle by means of local area jointing, so that over-positioning and positioning instability are avoided; meanwhile, the wound area is reduced to the maximum extent. A dissection point is positioned through the reconstructed model, so that the lower extremity force line can be reconstructed accurately, and accurate osteotomy is realized.