摘要:
An orthopedic milling machine includes an orthopedic guide pin including a bone engaging end and a burr including a hub, the burr being configured for rotation about an axis of the hub, the hub including a bore adapted to receive the orthopedic guide pin, and the burr can be moved laterally toward the guide pin at any location along the length of the guide pin until the guide pin is positioned in the bore.
摘要:
A modular shoulder prosthesis is provided. The modular prosthesis includes a stem, an anatomic insert, and a reverse insert. The stem is a unitary body that includes a distal shaft portion and a proximal portion. The proximal portion includes a stem face configured to directly couple to both the anatomic insert and reverse insert. The stem face includes a first engagement feature configured to couple directly to the reverse insert and a second engagement feature configured to couple directly to the anatomic insert. The stem can also include a metaphyseal portion between the shaft portion and proximal portion designed for use in humeral fracture repair procedures. The metaphyseal portion can include a medial arm and two lateral arms extending between the shaft portion and proximal portion, A window can be defined between the medial arm and the lateral arms, and a gap can be formed between the lateral arms.
摘要:
An apparatus and modeling method of the present invention includes the successive steps of generating cartographic data representative of points belonging to a glenoid surface; distinguishing from among the cartographic data a first group of cartographic data corresponding to a first part of the glenoid surface, the first surface part being situated farthest down in the vertical direction in relation to the scapula; calculating from the first group of cartographic data a first ellipsoid portion that coincides substantially with the first surface part; and obtaining a theoretical glenoid surface from the first ellipsoid portion. By virtue of the theoretical glenoid surface obtained by this method, it is possible to assist the surgeon in optimizing the position of implantation of a glenoid component and to produce a glenoid component “made to measure” for the scapula that is to be fitted with a prosthesis.
摘要:
This glenoidal component for a shoulder prosthesis comprises a base which may be immobilized on the glenoid cavity of a shoulder, and an element provided to be mounted on this base and forming a convex surface of articulation centered on an axis of symmetry. This axis of symmetry is non perpendicular to a rear face of the base intended to abut against the glenoid cavity, this making it possible to compensate a defect in parallelism between the resectioned surface of the glenoid cavity and the axis of the patient's spinal column.A surgeon can select the component in which the axes of symmetry of the components are oriented differently with respect to their rear faces.
摘要:
A method of forming a shoulder prosthesis includes resecting an end portion of a humerus to form a resected end of the humerus and a resected portion separated from the humerus, the resected portion having an outer convex surface and an inner surface. The inner surface of the resected portion is processed to include a concave articular surface. The outer convex surface of the resected portion is implanted in the resected end of the humerus. An implant having a convex articular surface is secured to a glenoid. The concave articular surface of the resected portion is articulated with the convex articular surface of the implant.
摘要:
Method and set of surgical instruments for fitting a shoulder prosthesis, and the shoulder prosthesis. The proposed method seeks to interpose a bone graft between the previously prepared glenoid surface (G) of a scapula (S) of a patient's shoulder and the face of a glenoid prosthetic component opposite the articular surface. The set of instruments permit the bone graft to be taken from the upper epiphysis of the humerus (H), either in situ or ex vivo.
摘要:
A prosthesis and method for a ball and socket joint. The prosthesis includes a first component including an anchoring shank and a metaphyseal portion. The metaphyseal portion includes a first articular surface configured to move in translation relative to the anchoring shank. An intermediate component includes a first articular surface configured to engage with the first articular surface on the metaphyseal portion, and a second articular surface configured to engage with the ball and socket joint.
摘要:
A surgical instrument including at least one tibial phantom generally corresponding to at least certain features of the tibial implant. The tibial phantom includes a top surface adapted to move freely against the prepared bottom end of the tibia. At least one talus phantom generally corresponding to at least certain features of the talus implant is engaged with the prepared top surface of the talus. At least one phantom skid is located between the tibial phantom and the talus phantom. The phantom skid is engaged with the tibial phantom such that dynamic engagement between the phantom skid and the talus phantom through at least extension and flexion of the ankle joint positions the tibial phantom on the prepared bottom end of the tibia. The phantom skid can either be a part of the tibial phantom or a separate component.
摘要:
A method for implanting a malleolar implant in an ankle joint. A spacer block is positioned between a lower portion of a tibia and an upper portion of an astragalus in the ankle joint. A guide attached to the spacer block is positioned opposite an outer surface of a fibular malleolus. A bore aligned with the guide is formed through the fibular malleolus. The spacer block is removed from between the tibia and the astragalus. A shank of the malleolar implant is engaged with the bore from an inner surface of the fibular malleolus. The shank is advanced into the bore so an inner surface of a head of the malleolar implant engages the inner surface of the fibular malleolus.