Abstract: An acetabular reaming system is disclosed of the type having a driver and a tool held together by a quick-release coupling mechanism. The tool (10) has a hollow body (12) defining a domed shape with a rotational axis (14), an apex (16) aligned with the axis (14) and a hemispherical wall (18) extending from the apex (16) to an equatorial rim (20) spaced 90 degrees from the axis (14). The rim (20) has an edge (22) visible to the user that indicates the position of the tool (10) relative to the bone. A first plurality of cutting sites (24) is arrayed along the body (12) and a second plurality of cutting sites (28) is arrayed circumferentially along the edge (22). Preferably, the first plurality of cutting sites (24) present raised first teeth (30, 130, 230, 330) having a profile selected from continuous squared (30), continuous rounded (130), discontinuous squared (230) and tongued (330) profiles.

Abstract: An acetabular reaming system is disclosed of the type having a driver and a tool held together by a quick-release coupling mechanism. The tool (10) has a hollow body (12) defining a domed shape with a rotational axis (14), an apex (16) aligned with the axis (14) and a hemispherical wall (18) extending from the apex (16) to an equatorial rim (20) spaced 90 degrees from the axis (14). The rim (20) has an edge (22) visible to the user that indicates the position of the tool (10) relative to the bone. A first plurality of cutting sites (24) is arrayed along the body (12) and a second plurality of cutting sites (28) is arrayed circumferentially along the edge (22). Preferably, the first plurality of cutting sites (24) present raised first teeth (30, 130, 230, 330) having a profile selected from continuous squared (30), continuous rounded (130), discontinuous squared (230) and tongued (330) profiles.

Abstract: An orthopedic prosthetic inserter used for the implantation of an acetabular prosthetic cup implant. The inserter consists of a drive train, a C-shaped housing, and a collet mechanism used to attach a prosthetic cup implant. When activated by the drive train, the collet mechanism expands to draw the prosthesis towards the collet mechanism and create a substantially friction tight engagement therebetween.

Abstract: A reamer system is provided which includes a cannulated reamer handle, and a corresponding cannulated reamer, which, when assembled and operated over a drill pin secured in a manner axially aligned with the stem of the femoral joint, enables the accurate and controlled reshaping of the femoral joint. The reamer is made up of a cutting form and a central guide, in which the guide is supported at the center of the cutting form by a bar structure. The bar structure includes portions which connect to and extend radially between the central guide and a peripheral edge of the cutting form. Optionally, the central guide includes a surface offset from a plane of the bar structure to a degree which enables that surface to contact an associated surface referenced to the bone, in order to prevent the cutting form from plunging so far over the bone as to potentially damage the femoral stem.

Abstract: An acetabular reamer (10?) for cutting a required cut shape is described. The reamer (10?) has a cutting shell (12?) having a series of doubly curved cutting teeth (16?) thereon of a quantity to substantially reduce a cutting pressure on each tooth as well as to reduce a size of a typical chip generated upon cutting. Substantially all of the teeth have a matched arc cutting edge (20?) of substantial length that has a cutting profile which substantially matches a profile of a shape to be cut. The apertures in which the cutting edges are formed have at least one straight edge (80) by which a punch, used in the process of forming the edge, may be oriented. Such a configuration reduces the number of teeth required to cut the shape.

Abstract: A guided reamer (10) has a central cannulation (12, 12a) adapted to receive a drill pin (14) secured in a manner which is axially aligned with the stem (22) of the bulbus bone joint (20). The reamer (10)has a profile cutting form (24) with cutting teeth (40) formed therein for cutting a form of a defined profile. The reamer (10) has a circumferential rim (34) having rim cutting teeth (36) disposed to cut to an outside of the rim and an inside of the rim, having face cutting teeth (37) adapted to cut an annular channel into bone and a plurality of planing teeth (52) radially disposed on an internal surface adjacent an axial end boss (44). The cannulation (12, 12a) is supported at the apex of the cutting form (24) and is formed in a guide assembly (70, 70?) affixed to the apex. The guide assembly (70, 70?) is adapted for imparting rotation to the reamer (12).

Abstract: An acetabular reamer (10) for cutting a required cut shape. The reamer has a cutting shell (12) having a series of doubly curved cutting teeth (16) thereon of a quantity to substantially reduce a cutting pressure on each tooth as well as to reduce a size of a typical chip generated upon cutting. Substantially all the teeth each have a matched arc cutting edge (20?) of substantial length that has a cutting profile which substantially matches a profile of a shape to be cut. Such a configuration reduces the number of teeth required to cut the shape.

Abstract: An acetabular reamer (10?) for cutting a required cut shape. The reamer has a cutting shell (12?) having a series of doubly curved cutting teeth (16?) thereon of a quantity to substantially reduce a cutting pressure on each tooth as well as to reduce a size of a typical chip generated upon cutting. Substantially all the teeth each have a matched arc cutting edge (20?) of substantial length that has a cutting profile which substantially matches a profile of a shape to be cut. The apertures in which the cutting edges are formed has at least one flat edge by which a punch, used in the process of forming the edge may be oriented. Such a configuration reduces the number of teeth required to cut the shape.

Abstract: An acetabular impactor aids a surgeon in controlling the installation of an acetabular cup prosthesis having a central, female aperture. The impactor includes an impactor head, housing and a locking mechanism. The housing is attached to the impactor head, the housing enclosing a drive train having, at a far end, a prosthesis engaging thread, and at the opposite end, a handle which facilitates turning of the drive train by the operator. The locking mechanism is associated with the housing which selectively locks the drive train, and thus the prosthesis, in position. The opposite end of the drive train has a latch device which enables quick removal from the housing for cleaning and sterilization.

Abstract: An adjustable reamer spindle is provided to aid the surgeon in controlling the instrument. The reamer spindle is easily disassembled for cleaning. The spindle has a repositionable handle, a locking ring, and an elastic device. The elastic device biases against a handle locking mechanism that locks the repositionable handle at angular positions about an axis of the spindle. The elastic device further biases a locking ring into a locked position. The locking ring aids in holding the reamer spindle together. Removal of the locking ring against an elastic bias of the elastic means unfastens an end of the assembly in order to facilitate disassembly and/or cleaning. Adjustment of the position of the handle about the spindle enables the palm/grip of each hand to be changed in order to provide maximum control in different orientations.

Abstract: A surgical ratchet assembly includes a handle, a driver, a ratcheting mechanism and a locking mechanism. The driver is received within the handle in a rotatable relationship with respect thereto. The ratcheting mechanism is interposed between the handle and the driver. A locking mechanism releasably holds the handle to the ratchet mechanism. Unlocking of the locking mechanism enables ready disassembly of the assembly for cleaning and component sterilization.

Abstract: An acetabular reamer for surgical use includes (a) a substantially hemispherical dome defining an equatorial plane, and (b) a reamer spindle interface structure fixedly attached to the inside of the dome so as to substantially inset the interface structure within the dome. This insetting of the interface structure helps minimize the size of an assembly of the reamer and a reamer spindle when performing minimally invasive joint surgery.

Abstract: An acetabular inserter (10, 10?, 10?) aids a surgeon in controlling the installation of an acetabular cup prosthesis (11) having a central, female aperture (13). The inserter includes a head (20), a housing (12, 12?, 12?) and a locking mechanism (44, 50, 52, 54, 56, 60, 62, 67, 68; 124, 130, 142, 146; 180, 193, 194, 195, 196, 200, 202, 206, 210, 212, 14). The housing (12, 12?, 12?) is attached to the head, the housing enclosing a drive train (14, 14?, 14?) having, at a far end (134), a prosthesis engaging thread (124), and at the opposite end (42?), a handle (20, 20?, 20?) which facilitates turning of the drive train by the operator. The locking mechanism is associated with the housing which selectively locks the drive train, and thus the prosthesis, in position. The opposite end (42?) of the drive train has a latch device (52, 54, 56, 60, 62; 44, 50; 180) which enables quick removal from the housing for cleaning and sterilization.

Abstract: A disposable reamer is provided, made up of a base and a thin-walled, perforated cutting body of flat metal stock affixed thereto. The base and body may be molded together or assembled together in a mechanical manner. The body is optionally formed so as to comprise a plurality of appendages connected at a center so as to improve die forming of the body into a final desired shape while at the same time minimizing stress-induced deformation in the body.

Abstract: Disclosed is a guided orthopedic bone reamer (10a) for cutting a profile relief shape (21a) into a joint bone (20). The reamer (10a) has a cutting head (30a) and an axial guide assembly (70). The cutting head (30a) has a profile cutting form (24a) with a rim (34) and an apex (38a). The apex (38a) connects to the cutting form (24a) by a set of struts (94). An axial guide assembly (70) has one end (44a) fixed to the apex (38a) and at the other end has a bayonet mechanism (76) connectable to a drive handle. Rim cutting teeth (36a) are set into the rim (34) to cut a cylindrical profile (21a), and bevel cutting teeth (96) integral to the struts (94) cut a bevel (25) onto the cylindrical form (21a) cut into the bone (20). A guide pin bore (12a) passes through the apex (38a)and the guide assembly (70) concentric with the axis of rotation (18) to receive a guide pin (14) to guide the reamer (10a) in cutting alignment relative to the joint bone (20) to be cut.

Abstract: An acetabular reamer (10?) for cutting a required cut shape. The reamer has a cutting shell (12?) (12?) having a series of doubly curved cutting teeth (16?) thereon of a quantity to substantially reduce a cutting pressure on each tooth as well as to reduce a size of a typical chip generated upon cutting. Substantially all the teeth each have a matched arc cutting edge (20?) of substantial length that has a cutting profile which substantially matches a profile of a shape to be cut. The apertures in which the cutting edges are formed has at least one straight edge (80) by which a punch, used in the process of forming the edge may be oriented. Such a configuration reduces the number of teeth required to cut the shape.

Abstract: Disclosed is a surgical tool holder 11 adapted to connect to a disposable cutting tool 12, and the surgical instrument 10 combination. The tool holder 11 has a shank 14 with a quick tool coupling 24 at one end 16 and a drive adaptor 20 at a second end 22. The coupling assembly 24 has a coupling interface 40 for holding the tool 12, and has a debris reservoir 44. A locking mechanism 26 is engageable with the shank 14 by a lock interface 95 that holds the coupling assembly in functional assembly, and when unlocked allows component parts of the coupling assembly to be separated for cleaning and sterilization. The surgical tool 12 has a flat base 104 and complementary fittings 114 adapted to be received by the holder's coupling interface. The combination of the flat base 104 with the reservoir 44 defines a relatively enclosed collection space 46 to receive cutting debris from the tool 12 while the holder 11 and tool 12 are coupled together.

Abstract: A surgical tool holder 12 and tool system 10 is provided. The surgical tool holder (12) is adapted to connect to a tool support (14) having an interface receiver (36). The tool support provides a mount for a surgical tool head. The tool holder (12) includes a center rod (20), a tool interface (28) and a quick connect mechanism (50). The center rod (20) has a first shank end (24) and a second tool end (26). The tool interface (28) is disposed on the tool end (26) of the center rod (20). The tool interface (28) has at least one transversely extending portion (44, 44a), extending radially outward, beyond the diameter of the center rod (20) at the tool end (26). The interface (28) is adapted to engage with the interface receiver (36). The quick connect mechanism (50) is disposed on the center rod (20) to move in a rotationally-constrained manner thereon proximate the tool interface (28).

Abstract: A reamer system is provided which includes a cannulated reamer handle, and a corresponding cannulated reamer, which, when assembled and operated over a drill pin secured in a manner axially aligned with the stem of the femoral joint, enables the accurate and controlled reshaping of the femoral joint. The reamer is made up of a cutting form and a central guide, in which the guide is supported at the center of the cutting form by a bar structure. The bar structure includes portions which connect to and extend radially between the central guide and a peripheral edge of the cutting form. Optionally, the central guide includes a surface offset from a plane of the bar structure to a degree which enables that surface to contact an associated surface referenced to the bone, in order to prevent the cutting form from plunging so far over the bone as to potentially damage the femoral stem.

Abstract: An acetabular reamer (10) has a cutting structure (12) rotatable about a longitudinal axis (14) with a domed shell portion (16). The shell (16) has an outer surface (18) presenting multiple cutting sites (20) and an inner surface (22) for accumulation of debris. The shell (16) has a static insertion profile area that is defined by a pair of first curved portions (24) generated about a first radius (30) with a center that lies on the axis (14) and a pair of second curved portions (26) generated about a center that is spaced apart from the axis. The cutting structure (12) has a circular dynamic profile area generated upon rotation of the reamer (10) by a handle (40). Both the static insertion area and dynamic profile area lie transverse to the axis (14), the former being smaller than the latter.