73 results about "Glenoid cavity" patented technology

A method of performing a shoulder joint surgery involving a scapula having a glenoid cavity, a humerus and a humeral ball on a surgical table includes mounting a retractor support to the surgical table and positioning the retractor support about the shoulder joint. The skin and flesh layers proximate the shoulder joint are incised and the skin and flesh layers are manually retracted with a retractor. The retractor is secured in a selected position by attaching the retractor to the retractor support.

The invention concerns a shoulder prosthesis assembly comprising a meta-glenoid element (7) formed by a plate (13) provided with a central tubular block (14) an anchoring members in the glenoid cavity (3), and a glenoid sphere (9) designed to top the metaglenoid element and provided with an axial screw (35) screwed into said pin; the glenoid sphere has an articulated surface (11) designed to co-operate with a cup of an associated humeral prosthesis (2); said assembly comprises means (16, 45, 46; 51, 50, 49) guiding the glenoid sphere adapted to facilitate its being fixed on the meta-glenoid element; said means comprise a pin (46) adapted to be slotted into the tubular block (14) and into an axial passage of the screw (35); the glenoid sphere (9) is thus guided by being slid on the pin (46) until the screw (35) is inserted precisely into the axis of the tubular block (14), wherein it can be screwed without any risk of damaging the thread on the screw and the internal thread of the block. Advantageously, the free end (48) of the screw (35) can likewise be bevelled to facilitate its being inserted in the block (14) without damaging the threads. The inventive arrangement is particular useful considering the difficulties encountered by the surgeon for correctly positioning the glenoid sphere (9) relative to the meta-glenoid element (7) owing to lack of visibility.

The glenoid component according to the invention comprises a metal body of which the inner face is adapted to be immobilized on the glenoid cavity of a shoulder and of which the outer face bears a concave articulating surface adapted to cooperate with a humeral component. This articulating surface extends on the periphery by a convex surface forming, at least in part, the edge of the body.

Inverse prosthesis of the shoulder for the articulation of a humerus in a scapula of a shoulder comprising a glenoid cavity. The prosthesis includes an at least partly convex articulation element, including elements for support and attachment to the glenoid cavity, and able to articulate with an at least partly concave mating articulation element, associated with the top of the humerus. The articulation element includes a substantially hemi-spherical element and a pin-type implant element made as distinct and reciprocally removable elements, so as to allow them to be assembled sequentially with respect to the glenoid cavity.

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 centred 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 most adapted to the orientation of the resectioned surface from a set of components in which the axes of symmetry of the components are oriented differently with respect to their rear faces.

A method of repairing separations in the capsular labrum structure, in which the head of the humerus bone separates from the glenoid cavity of the glenoid, by: producing a first plurality of anchor points in an anterior face of the rim of the glenoid; producing a second plurality of anchor points in a corresponding anterior face of the neck of the glenoid; and utilizing the first and second plurality of anchor points for attaching the tendons to the glenoid. Also described is an apparatus for use in repairing separations in a capsular labrum structure including a drill guide having a proximal end formed with a handle, and a distal end formed with a surface configured for engaging a posterior face of the neck of the glenoid to properly fix the position of the drill guide with respect to the glenoid. The drill guide is formed with a passageway sized and configured for receiving a drill for drilling a bore through the neck of the glenoid, with the entry point of the drill at the posterior face of the glenoid neck, and the exit point of the drill at the anterior face of the glenoid neck slightly spaced from the glenoid rim.

This total shoulder prosthesis comprises a glenoidal component, defining a substantially hemispherical convex articular surface and of which the centre of curvature is located in the glenoid cavity or in the immediate vicinity thereof, and a humeral component defining a concave articular surface adapted to cooperate with the convex articular surface of the glenoidal component. The concave humeral articular surface is defined by a metallic part of the humeral component, this avoiding having to resort to a part made of plastics material which would increase the space requirement of the prosthesis.

A prosthesis whose condyles (3) have a spiral form, viewed in the saggital plane and the femoral element (1) has a medial lobe (6) with a curved surface. The medial plateau (2) has glenoid cavities (2b) for the condyles (3) and a medial prominence (5) which forms a posterior support surface (5a) against which the lobe (6) is supported in the course of movement of the joint. The glenoid cavities (2b) on the medial plateau (2) and the condyles (3) are congruent in extension and in the first part of the flexion movement of the joint. The posterior sections of the condyles (3) and the medial lobe (6) inscribe circles with the same centres and the medial lobe (6) contacts against the posterior support surface (5a) at the end of the first part of movement and then rests against the posterior support surface (5a) to perform a “roll-back”.

The ancillary tool according to the invention comprises a plate which defines a convex surface intended to bear against the glenoid cavity of a patient's scapula and which forms a directional guide for a drilling, fashioning or like member. To allow the surgeon to apply this member in a chosen direction, the tool comprises means for adjusting the position of the guide with respect to the plate.

The present invention relates to an improved glenoid anchor for a shoulder joint prosthesis, in particular a convertible prosthesis, of the type intended to be fixed to the glenoid cavity of the shoulder blade and comprising:

• • a pin with an internally hollow and essentially thimble-like conical sleeve, which has a tapered distal end and an open proximal end;
  • an annular recess formed inside the cavity of the pin in the vicinity of said open proximal end, for receiving by means of snap-engagement an edge of a lug of a prosthesis component;
  • at least one pair of oppositely arranged anti-rotation notches in the proximity of said annular groove for receiving by means of snap fit oppositely arranged teeth of the same lug intended to be snap-engaged together with said pin.

A humeral prosthesis, for the articulation of a humerus in a scapula of a shoulder having a glenoid cavity, includes an articulation device able to be associated both with an articulation element mounted on the glenoid cavity, and also at the top of said humerus by an attachment element. The articulation device comprises a first element able to articulate with the articulation element and a second element associated with the attachment element, the first element and the second element being pivoted to each other around a pivoting axis to allow a free relative rotation thereof around the pivoting axis.

This preparation set comprises a drill guide (31) comprising a bearing surface (33) intended to bear against a glenoid cavity, a passage orifice (35) intended for the passage of a guide pin (36) implanted in the glenoid cavity, and first and second guide orifices (37, 38) each opening into the bearing surface (33) and each intended to guide a drill bit (38) capable of realizing a bone bore in the glenoid cavity, the first and second guide orifices (37, 38) being inclined with respect to the extension axis of the passage orifice (35) and converging in the direction of the bearing surface (33); and a compactor (42) comprising a compaction portion (45) having a generally trapezoidal shape and intended to be impacted against the glenoid cavity so as to form a bone housing in the glenoid cavity, the compactor (42) further including a passage hole (49) extending at least partially in the compaction portion (45) and intended for the passage of the guide pin (36) implanted in the glenoid cavity.

Disclosed herein are systems and methods for securing a glenoid baseplate to a resected glenoid cavity in a preoperatively planned position. Image information obtained from the glenoid cavity and surrounding scapula is analyzed to determine the location of optimal bone stock. A guide is designed based on the image information, the guide having a patient specific contact surface that contacts a surface of the bone in a preoperatively planned position. The guide is designed to have a cannulated portion including a specific length. A marking pin having at least one reference feature is drilled into the glenoid cavity. The length of the cannulated portion of the guide is based on a location of the at least one reference feature on an outer surface of the marking pin. A cannulated reamer guided by the marking pin is then used to resect the glenoid cavity until a stop surface of the cannulated reamer contacts an end of the marking pin.