Other

Orthofix S.r.l.

Pennig, Dietmar

Dietmar Pennig

Giovanni Faccioli

Daniele Venturini

Stefano Rossi

Device for the extraction of screw-threaded wires particularly for

Multipurpose container in particular for threaded wires for operations

In application to an external fixator wherein at least one end of a fixator body is equipped with a first ball-joint component that is releasably connected or connectible to a second ball-joint component forming part of a bone-screw clamp, the invention provides a major capacity for enlarging the achievable range of possible angles as between the longitudinal axis of the bone-screw clamp and the longitudinal axis of the fixator body. Three different embodiments are disclosed. In a first disclosed embodiment, the expanded range is achieved by structural modification of the bone-screw clamp per se. In the other two embodiments, the expanded range is achieved by interposition of a connector unit having one of its respective ends a ball-joint connection component that is uniquely compatible with the ball-joint component of the fixator body and at the other of its ends a ball-joint connection component that is uniquely compatible with the ball-joint component of the bone-screw clamp.

Clamping coupling

A clamping assembly for bone-screw or bone-pin adjustment (a) longitudinally along the guideway of an external fixator, and (b) angularly about a pivot axis at a selected longitudinal location. The clamping assembly comprises a slide block adapted for releasably locked longitudinal positioning along the guideway, an intermediate plate element, and a clamp block, in sandwiched relation, with a single central bolt to secure (i) a selected angular setting of bone-screw engagement grooves coacting between the clamp block and the upper surface of the intermediate plate, and (ii) coacting arcuate tongue-and-groove formations wherein the releasably lockable coaction is between the slide block and the lower surface of the intermediate plate, to secure a given clamped angular orientation of bone-screw orientation with respect to the longitudinal direction of the guideway.

Device for osteosynthesis

The invention contemplates a compression wire for fixated retention of a fractured small bone fragment in an osteosynthesis procedure. The wire comprises a smooth-walled shank portion and an adjoining threaded portion, of lesser diameter than the diameter of the shank portion, there being a step-down shoulder between the shank portion and the threaded portion. The shank portion is adapted for chucked engagement to a portable rotary drill, and the distal end of the threaded portion is configured for self-tapping entry into and threaded implantation in bone. The implantation is complete when the shoulder engages cortex tissue of the fragment, holding the same in compression against remainder structure of the fractured bone. Once implanted, the shank may be nipped by a cutter tool at relatively close offset from the shoulder.

Fixation pin for small-bone fragments

A medullary cavity template has a tubular body adapted to the shape of a medullary nail. The tubular body has one or more x-ray viewable discontinuities in the region of its distal end. The tubular body also has a scale in the region of its proximal end, the scale being on the outside of the body for external viewing to measure axial depth of a medullary cavity.

Medullary cavity template

The invention relates to a headed screw for fixing an intramedullary nail in position. An external thread on the screw shank is provided over all, or a part of spaced parts, of the length of the shank. The screw head is provided with an external thread having a direction of helical advance which is opposite the direction of helical advance of the screw-shank thread.

Headed screw construction for use in fixing the position of an

A medullary nail has a plug-like insert arranged in the end region of the nail. The insert consists of a readily drillable or screwable material that is suitable for receiving a corresponding attachment element such as a bone screw or a bone pin. The medullary nail is otherwise of standard metal construction, preferably of stainless steel.

Intramedullary nail with screw-receiving solid insert

The invention refers to an osteosynthesis aid which is used, in particular, for the fixation of a pelvis and includes a central body which is formed of at least two arm or link members, each of which has an elongate slot through which a lock bolt is passed to provide a releasably clamped joint and each of which also has releasably secured ball-joint connection to an end-connecting clamp for bone-pin or bone-screw anchorage to an afflicted bone.

Osteosynthesis aid

The invention contemplates a fixation pin for retaining small bone fragments in an osteosynthesis procedure. The pin comprises a smooth-walled shank portion and an adjoining threaded portion, wherein a step-down conical shoulder is formed between the shank portion and the threaded portion.

A clamping coupling for fixing bone screws, pins or the like incorporates a rotary joint between the bone-screw fixing region of the coupling and a ball-joint connection region of the coupling, whereby an extended range of angular adaptability and fixation are achievable, as compared to the more limited range of angular articulation achieved by the ball-joint action alone.

The invention relates to a screw for fixing an intramedullary nail in position. An external thread on the screw shank is provided over only a part of the length of the shank. The screw head is provided with an external thread having a direction of helical advance which is opposite the direction of helical advance of the screw-shank thread.

Head screw construction for use in fixing the position of an

An adjuvant for osteosynthesis comprises an osteosynthesis plate which is capable of rigid connection to the axial end of a medullary nail. In the case of a pertrochanteric fracture of the femur, with a medullary nail in the proximal region of the femur, an external-end connection is provided for the osteosynthesis plate; and the osteosynthesis plate is provided with a distributed pattern of bores to accommodate bone screws, wherein bone screws of one kind are used for the fixation of the osteosynthesis plate to the femur, and bone screws of another kind are used for the fixation of the osteosynthesis plate to the neck of the femur. The bores are in transversely spaced array, at spacings that are greater than the diameter of the medullary nail, so that bone screws of each pair can bypass the medullary nail, on opposite sides of the medullary nail. In another embodiment, an osteosynthesis plate is fixed by bone screws to the head of a humerus, and the plate holes for the screws are on opposite sides of the axial projection of the upper end of a medullary nail in the humerus; a rigid axial-end connection of the medullary nail to the plate stabilizes the thus-connected end of the medullary nail and all bone-screw anchorages.

Adjuvant for osteosynthesis in the case of pertrochanteric fracture of

A drill-guide device is for use in establishing alignments for bone screws driven into the neck of a femur, for bone immobilization following a femoral-neck fracture, particularly in the circumstance of an intramedullary nail already installed in the shaft of the same femur. The device provides a drill template with at least one pair of horizontally spaced guide bores, which are sufficiently spaced to straddle opposite sides of the intramedullary nail and which can be oriented to produce drilled holes which pass up the femoral neck and into the head of a the femur. The axes of the guide bores converge to a point of their geometric intersection beyond the femoral head. Provision is made for detachably connecting the template to the proximal end of the intramedullary nail and for releasably fixing the vertical position and the elevationally tilted position of the template, for a range of adjustments to adapt the device to the differing sizes and proportions of individual patients.

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Koln, Germany

Dietmar Pennig