摘要:
A long bone prosthesis (10) includes a neck portion (12), a stem portion (16) and an intermediate portion (20) disposed between the neck portion (12) and stem portion (16). The intermediate portion (20) includes seals (24,40,55) for containing cement (270) thereabout under pressure adjacent thereto and preventing leaking of cement (270) therefrom during implantation of the prosthesis (10).
摘要:
A prosthesis having stresses acting on the interface between prosthesis and bone is designed by a computerized method in which the shape of hte prosthesis is iteratively changed. A femoral head prosthesis is positioned in a bone by means of positioning elements, after which acrylic cement is inserted into the bone.
摘要:
The present invention relates to a device for producing bone cement for fixing protheses, whereby the bone cement is produced by mixing various substances with each other in a space (22) of a feed device (20) to provide a setting mass which in set condition is adapted to fix protheses at surrounding bone tissue and whereby the mixture (19) is pressed out from the space (22) by means of the feed device (20) for applying the mixture to the bone tissue. In order to produce non-porous bone cement in one device and to insert this bone cement produced by the same device into the bone tissue, a vacuum source (17) is connectable to said feed device (20) and this vacuum source (17) is adapted to generate such a vacuum, preferably a vacuum of 0,05-0,5 bar absolute pressure, in said feed device (20) during mixing of said various substances therein, that introduction or addition of air into said mixture (19) is minimized.
摘要:
Seringue à vide pour ciment d'os munie d'un récipient (8) pour le ciment d'os avant son application ainsi que d'un dispositif de préssurisation pour réaliser une pré-compression du ciment dans le récipient (8). Une cloche (100) est placée sur le récipient (8) au moyen d'une bride (105) pourvue d'un tube à vide (110) pour aspirer les gaz dégagés pendant la pré-compression. De cette manière on peut réduire la porosité du ciment d'os appliqué.
摘要:
Dispositif et procédé pour le mélange d'un matériau composé d'au moins deux constituants, en particulier un dispositif et un procédé pour mélanger un ciment d'os et pour remplir un récipient d'application (130) dudit ciment. Le dispositif comporte un mélangeur (100) ainsi qu'un anneau d'étanchéité (140) pouvant être couplé avec le récipient d'application (130). Ce récipient (130) est situé dans la chambre de mélange (100) et peut se déplacer par rapport à cette dernière. En raison du mouvement relatif du récipient d'application (130) et de la chambre de mélange (100), le ciment d'os subit une action de mélange et est chargé dans le récipient d'application (130).
摘要:
Dispensing unit for mixers of biphasic compounds, for dispensing a quantity of mixed biphasic compound through a channel of at least a mixing unit by means of at least a piston sliding inside at least a mixing chamber, wherein it includes at least a drive element for said piston which can be remotely controlled.
摘要:
A device for dispensing biomaterial includes a handle configured to receive a syringe, the syringe including a biomaterial and a threaded plunger, and an engagement pin retained within the handle and slidable between a first position and a second position. The engagement pin is configured to engage the threaded plunger in the first position, the engagement pin is further configured to disengage from the threaded plunger in the second position.
摘要:
The present invention provides tools and methods for mapping and measuring the articular surface of a joint (or of any bony surface) and for fabricating a prosthetic device based on this recorded data. In one embodiment, once the defect of the chondral surface has been identified, a guide pin (20) is inserted arthroscopically. A fixation screw (10) is driven into the subchondral bone in relation to a reference axis that is approximately central to the defect, the fixation device also serving to define a tangent point to the surrounding articular surface. A measuring tool (70) having a static post that establishes the axial location of origin is inserted on the reference axis. Data recorded during the mapping procedure is entered into parametric engineering design software of similar algorithm to define a three dimensional surface matched to the bearing surface geometry to be implanted and reproduce the anatomic contours mapped (Figure 1).