Abstract: A system for reaming a bone comprising: a base comprising a connector adapted to couple the base to a driver and a support surface; a first reaming member comprising: a first seating surface shaped to seat the first reaming member over the support surface, a first reaming surface adapted to ream a bone to a first diameter, and a first attachment mechanism attaching the first reaming member to the base; a second reaming member comprising: a second seating surface shaped to seat the second reaming member over the support surface, a second reaming surface adapted to ream a bone to a second diameter, and a second attachment mechanism attaching the second reaming member to the base; wherein the second diameter is larger than the first diameter.

Abstract: A surgical component, a kit including the surgical component, and a surgical method. The surgical component includes a body portion. The surgical component also includes an elongate stem for inserting into an intramedullary canal of a patient. The elongate stem extends distally from the body portion. The elongate stem has a longitudinal axis; a proximal end; a distal end; and a plurality of splines located on an outer surface of the stem. The splines are circumferentially arranged around the stem. At least some of the splines are tapered such that each tapered spline is narrower at a distal part of that spline than at a part of that spline that is proximal with respect to the distal part. The surgical component further includes an elongate neck portion extending from the body portion at a non-zero angle with respect to the longitudinal axis of the stem.

Abstract: An angular adjustment mechanism for a surgical instrument is described. The mechanism comprises an adjustment member (102) configured for rotation about a longitudinal axis (122), the adjustment member comprising a plurality of pairs of facets (134) arranged about the longitudinal axis. Each of the plurality of pairs of facets defines a respective angled axis (148B,148C) at an angle (150B,150C) relative to the longitudinal axis. A pivoting member (104) is arranged to pivot about a pivot axis perpendicular to the longitudinal axis and comprises a recess (128) for receiving the adjustment member and engaging one pair of the plurality of pairs of facets. This provides an angular adjustment mechanism in which facets on the outside of the adjustment member engage corresponding surfaces in a recess on a pivoting member. The use of facets provides a secure connection while allowing a greater degree of angular adjustment and providing a further benefit of simple operation.

Abstract: A method of manufacturing a surgical instrument or prosthesis and a surgical instrument or prosthesis so manufactured are described. A first material is injected into a first mould to form an interim component. Portions of the interim component define at least one channel. The maximum wall thickness of the interim component is less than a first threshold determined by the injection moulding properties of the first material. The maximum width of the at least one channel is less than a second threshold determined by the injection moulding properties of a second material. The second material is injected into a second mould containing at least part of the channel of the interim component so that the channel is at least partially filled with the second material.

Abstract: An angular adjustment mechanism for a surgical instrument is described. The mechanism comprises an adjustment member (102) configured for rotation about a longitudinal axis (122), the adjustment member comprising a plurality of pairs of facets (134) arranged about the longitudinal axis. Each of the plurality of pairs of facets defines a respective angled axis (148B,148C) at an angle (150B,150C) relative to the longitudinal axis. A pivoting member (104) is arranged to pivot about a pivot axis perpendicular to the longitudinal axis and comprises a recess (128) for receiving the adjustment member and engaging one pair of the plurality of pairs of facets. This provides an angular adjustment mechanism in which facets on the outside of the adjustment member engage corresponding surfaces in a recess on a pivoting member. The use of facets provides a secure connection while allowing a greater degree of angular adjustment and providing a further benefit of simple operation.

Abstract: A multi-function impactor for use with an orthopaedic implant, such as a knee joint, is described. The head of the impactor has a pair of curved recesses for mating with condylar parts of a femoral implant and flat faces for mating with a tibial implant. An extended formation is also provided for use with the inter-condylar notch of the femoral implant. A v-shaped notch in the extended formation is also provided to impact a tibial insert. The impactor can be made from a single moulded plastics part.

Abstract: A surgical instrument comprising: a first component (104); a second component (102) coupled to the first component (104) and arranged to move relative to the first component (104); and a grip (114) secured to the second component (102). The grip (114) is arranged to be manipulated by a user to move the second component (102) relative to the first component (104); wherein the grip (114) is formed from an elastomeric material and the instrument further comprises an elastomeric spring portion (118) integrally formed with the grip (114), the spring portion (118) extending from the grip (114) and arranged to bias relative movement between the first and second components (102, 104).

Abstract: A multi-function impactor for use with an orthopaedic implant, such as a knee joint, is described. The head of the impactor has a pair of curved recesses for mating with condylar parts of a femoral implant and flat faces for mating with a tibial implant. An extended formation is also provided for use with the inter-condylar notch of the femoral implant. A v-shaped notch in the extended formation is also provided to impact a tibial insert. The impactor can be made from a single moulded plastics part.