Greatbatch Medical S.a.

Precimed S.a.

Greatbatch Ltd.

Yves Desarzens

Patrick Michael White

André Lechot

Patrick Michel White

Hugh Davies

Jonas Burgi

Philippe Fehlbaum

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 () has a hollow body () defining a domed shape with a rotational axis (), an apex () aligned with the axis () and a hemispherical wall () extending from the apex () to an equatorial rim () spaced 90 degrees from the axis (). The rim () has an edge () visible to the user that indicates the position of the tool () relative to the bone. A first plurality of cutting sites () is arrayed along the body () and a second plurality of cutting sites () is arrayed circumferentially along the edge (). Preferably, the first plurality of cutting sites () present raised first teeth () having a profile selected from continuous squared (), continuous rounded (), discontinuous squared () and tongued () profiles. Also preferably, the second plurality of cutting sites () present raised second teeth () selected from continuous squared (), continuous rounded (), discontinuous squared (), tongued () and bladed () profiles.

Acetabular reamer

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.

Orthopaedic inserter using a collet mechanism

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. This offset surface is preferably polished to reduce friction during relative rotational movement between this surface and the surface referenced to the bone. The offset surface is an axially perpendicular surface of a boss through which the drill pin is guided.

Guided reamer system for reshaping bone

A reamer system is provided which includes a cannulated reamer holder, 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.

A surgical instrument holder () is made up of a head assembly () and a drive spindle assembly (). The head assembly () has a shank () with a first driveable end () and second coupling end (). The second end has a coupling device () having an interface () for receiving a surgical instrument (). The instrument () is held in functional assembly to the shank by a releasable locking mechanism (). The releasable locking mechanism () is made up of a locking ring () slideably disposed about the shank, a spring () biased against the coupling device () by the locking ring, and a connection ring () retaining the locking ring in a fixed position during use. The drive spindle assembly (42) is connected to the head assembly () so as to transmit torque therethrough. The spindle assembly () has an elongated drive spindle (), high precision bearings () and a cylindrical tube (). The drive spindle () is releasably mounted to an end (36) of the spindle assembly and is supported for rotation within the cylindrical tube () by the high-precision bearings disposed therebetween and held in place at least in part by the shank (). The bearings () precisely control the position of a surgical instrument () affixed thereto. The connection ring () provides a common quick-release connection with the head assembly () and the drive spindle assembly (), such that unlocking of the connection ring () enables quick disassembly of the connection ring, spring (), locking ring (), and drive spindle assembly () for cleaning and component sterilization.

Precision spindle instrument holder for surgical instrument

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. The adjustment is desirable in order to accommodate operating on the left or right side of the patient, standing behind or in-front of the patient, or the use of a different surgical approach. Further, adjustment is important to accommodate the differing needs of surgeons who are naturally left or right handed.

Reamer spindle for minimally invasive joint surgery

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.

Inserter for minimally invasive joint surgery

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.

Inset acetabular reamer coupling

A rotary surgical reamer assembly for removing bone and tissue from a joint to facilitate the installation of a prosthetic device. The assembly includes a hollow reamer body having an opening and a base portion. The base portion includes a first pivoting link member, a wall with a surface defining a central cavity, and a plurality of spaced apart cutting sites defining apertures through said wall. A shaft is configured to be de-mountably attached to a rotary source of power. The shaft has a rotary axis and a second pivoting link member coupled to the first pivoting link member. The axis of the shaft forms an angle to the base portion. A mechanism adjusts the angle of the hollow reamer body from an un-deployed position to a deployed position.

Pivoting bone reamer for minimally invasive joint surgery

An instrument holder () for surgical use has a remote locking mechanism () and is elongated having a proximal end () and a distal end (). The holder () has an elongated shank (), a ring (), a locking component () and a spring (). The elongated shank () is equipped, at the distal end (), with a head () adapted to receive an instrument (). The locking component () is substantially cylindrical, elongated and is biased in a first direction () toward the head () by a spring (). The locking component () includes structures () capable of locking the instrument () onto the distal end (). The ring () is biased by the spring () in a second direction () against the locking component () towards the proximal end () constrained to slide longitudinally on the shank (), at the proximal end. The remote locking mechanism () permits releasable connection to the shank () and is engaged by rotation of the ring () such that release of the ring from the shank allows the spring () and locking component () to slide freely off the shank in order to permit cleaning of the instrument holder.

Remote release instrument holder for surgical use

A surgical tool holder has a shank having a central axis, a first driveable end and second coupling end. The second end has a coupling device having interfaces each for mating with corresponding structures on the inside of a hollow reamer. The interfaces mate with centering structures at or near a base end of each tool, the tool being held in functional assembly to the shank by a releasable locking mechanism.

Growing community of inventors

Corgemont, Switzerland

Yves Desarzens