Abstract: A set of ceramic acetabular cup prostheses (100) and ceramic femoral head prostheses (200) suitable for use therewith wherein the bearing diameter centre point of the cup is laterally offset from the outer diameter centre point of the cup along the longitudinal axis of the cup and wherein, for each cup in the set starting from the smallest cup in the set, the outer diameter increases in 2 mm increments and the inner diameter increases in less than 2 mm increments.

Abstract: A kit of parts for inserting a deformable implant into a cavity in a bone of a patient is described. An inserter instrument comprises a body having a cavity extending along a longitudinal axis from a distal end to a proximal end. An attachment mechanism is provided at the distal end and to which a deformable implant can be releasably attached. A drive mechanism is provided at the proximal end of the body. An insertion stop is mounted on the body and arranged to control the depth of insertion of the inserter instrument into a guide tube. A push rod is freely and slidably arranged within the cavity and has a distal end engageable with a part of the deformable implant and a proximal end abutable by the drive mechanism. The drive mechanism is operable to drive the push rod toward the distal end of the body. The kit also includes an impactor dimensioned for slidable engagement within the cavity.

Abstract: A kit of parts for inserting a deformable implant into a cavity in a bone of a patient is described. An inserter instrument comprises a body having a cavity extending along a longitudinal axis from a distal end to a proximal end. An attachment mechanism is provided at the distal end and to which a deformable implant can be releasably attached. A drive mechanism is provided at the proximal end of the body. An insertion stop is mounted on the body and arranged to control the depth of insertion of the inserter instrument into a guide tube. A push rod is freely and slidably arranged within the cavity and has a distal end engageable with a part of the deformable implant and a proximal end abutable by the drive mechanism. The drive mechanism is operable to drive the push rod toward the distal end of the body. The kit also includes an impactor dimensioned for slidable engagement within the cavity.

Abstract: A kit of parts for inserting a deformable implant into a cavity in a bone of a patient is described. An inserter instrument (1) comprises a body (100) having a cavity extending along a longitudinal axis from a distal end to a proximal end. An attachment mechanism (108) is provided at the distal end and to which a deformable implant can be releasably attached. A drive mechanism (132) is provided at the proximal end of the body. A push rod (150) is freely and slidably arranged within the cavity and has a distal end engageable with a part of the deformable implant and a proximal end abutable by the drive mechanism. The drive mechanism is operable to drive the push rod toward the distal end of the body. The kit also includes an impactor (210) dimensioned for slidable engagement within the cavity.

Abstract: An orientation guide comprising a housing arranged to couple to a surgical instrument. In one embodiment the orientation guide further comprises first and second indicators (22, 26). The first indicator (22) is pivotally coupled to the housing (20) such that the first indicator (22) can rotate relative to the housing (20) about a first axis (24) to maintain its angular position about the first axis (24) relative to a vertical axis irrespective of movement of the housing (20). The second indicator (26) surrounds the first indicator (22) and is pivotally coupled to the housing (20) such that the second indicator (26) can rotate relative to the housing (20) about a second axis (32) orthogonal to the first axis (24) to maintain its angular position about the second axis (32) relative to the vertical axis irrespective of movement of the housing (20).

Abstract: A kit of parts for inserting a deformable implant into a cavity in a bone of a patient is described. An inserter instrument (1) comprises a body (100) having a cavity extending along a longitudinal axis from a distal end to a proximal end. An attachment mechanism (108) is provided at the distal end and to which a deformable implant can be releasably attached. A drive mechanism (132) is provided at the proximal end of the body. A push rod (150) is freely and slidably arranged within the cavity and has a distal end engageable with a part of the deformable implant and a proximal end abutable by the drive mechanism. The drive mechanism is operable to drive the push rod toward the distal end of the body. The kit also includes an impactor (210) dimensioned for slidable engagement within the cavity.

Abstract: A support structure implant for location within a bone cavity to support the bone which defines the cavity is formed from wires by braiding in a machine direction from a first end of the structure towards an opposite second end. The wires are formed into loops at the first end of the structure so that two lengths of wire extend away from each loop and are formed into the braid. Each of the wires which is formed into the braid is held at the second end of the structure in a clamp. The clamp is provided by a support ring and a clamp ring which is formed from a shape memory alloy which can shrink to clamp the wires against the support ring when heated.

Abstract: A support structure implant for location within a bone cavity to support the bone which defines the cavity is formed from wires by braiding in a machine direction from a first end of the structure towards an opposite second end. The wires are formed into loops at the first end of the structure so that two lengths of wire extend away from each loop and a reformed into the braid. Each of the wires which is formed into the braid is held at the second end of the structure in a clamp. The clamp is provided by a support ring and a clamp ring which is formed from a shape memory alloy which can shrink to clamp the wires against the support ring when heated.

Abstract: A support structure implant for location within a bone cavity to support the bone which defines the cavity is formed from interlaced wires which extend from a first end of the structure towards an opposite second end. The wires are formed into loops at the first end of the structure. The structure includes a clip having a plurality of fingers which extend through the loops to control the spacing between the loops.

Abstract: An orientation guide comprising a housing arranged to couple to a surgical instrument. In one embodiment the orientation guide further comprises first and second indicators (22, 26). The first indicator (22) is pivotally coupled to the housing (20) such that the first indicator (22) can rotate relative to the housing (20) about a first axis (24) to maintain its angular position about the first axis (24) relative to a vertical axis irrespective of movement of the housing (20). The second indicator (26) surrounds the first indicator (22) and is pivotally coupled to the housing (20) such that the second indicator (26) can rotate relative to the housing (20) about a second axis (32) orthogonal to the first axis (24) to maintain its angular position about the second axis (32) relative to the vertical axis irrespective of movement of the housing (20).

Abstract: A support structure implant for location within a bone cavity to support the bone which defines the cavity is formed from interlaced wires which extend from a first end of the structure towards an opposite second end. The wires are formed into loops at the first end of the structure. The structure includes a clip having a plurality of fingers which extend through the loops to control the spacing between the loops.

Abstract: A support structure implant for location within a bone cavity to support the bone which defines the cavity is formed from wires by braiding in a machine direction from a first end of the structure towards an opposite second end. The wires are formed into loops at the first end of the structure so that two lengths of wire extend away from each loop and a reformed into the braid. Each of the wires which is formed into the braid is held at the second end of the structure in a clamp. The clamp is provided by a support ring and a clamp ring which is formed from a shape memory alloy which can shrink to clamp the wires against the support ring when heated.

Abstract: An assembly for deploying a stranded support structure implant within a bone cavity to support the bone which defines the cavity comprises a support structure implant and an insertion tool. The support structure implant is formed from interlaced wires which extend from a first end of the structure towards an opposite second end. The structure flares outwardly from the first end to a maximum transverse dimension at a wide point between the first and second ends, and tapers inwardly between the wide point and the second end to a constant cross-section throat portion at the second end. The structure includes (i) a clip for controlling the spacing between the wires at the first end of the structure, in which the clip carries one of a spigot and a socket, and (ii) a ring clamp at the second end to retain the wires at the second end, in which the ring clamp has at least one clamp engagement formation.

Abstract: A support structure implant for location within a bone cavity to support the bone which defines the cavity is formed from interlaced wires which extend from a first end of the structure towards an opposite second end. The structure flares outwardly from the first end to a maximum transverse dimension at a wide point between the first and second ends and tapers inwardly between the wide point and the second end to a constant cross-section throat portion at the second end. The structure includes a ring clamp at the second end to retain the wires in the throat portion which includes an internal support ring. The ratio of (a) the distance between the internal support ring and the interface between the tapering portion and the throat portion to (b) the diameter of the throat portion is not more than about 1.0.

Abstract: An instrument for forming a cavity within a bone. The instrument comprises a shaft, a blade pivotally mounted on the shaft towards a first end of the shaft and a push rod extending within the shaft and coupled to the blade, the push rod being arranged to slide within the shaft to cause the blade to rotate about its pivot. The instrument further comprises a depth stop coupled to the shaft arranged such that when the shaft is inserted into a bore extending into a bone the depth stop is arranged to engage bone surrounding the bore to limit movement of the shaft into the bore. A spring couples the push rod to the shaft and is arranged to resist axial movement of the push rod within the shaft towards the first end of the shaft. When the depth stop engages bone surrounding a bore, axial force exceeding the spring resistance applied to the push rod causes the push rod to slide within the shaft.