Medartis Ag

Elekta Instrument Gmbh

Michael Roth

Hermann Zeuner

Joachim Pfefferle

Peter Scheuble

Paul Rath-Prazak

Martin Bosch

The blockable bone plate consists of a plurality of plate members which are connected to each other via webs. A screw hole is provided in at least some plate members, preferably in each plate member. The screw hole is surrounded by a spherical countersink on the upper surface of the plate. Provided internally in the screw hole there is an engagement contour which consists of contour valleys and contour peaks partially running in a horizontal and radial peripheral direction on the wall of the screw hole. The engagement contour is preferably produced by milling and has for example a pointed, round, trapezoidal or serrated configuration. A blocking thread is provided under the screw head of the screw intended for blocking. As the screw is screwed in, the blocking thread engages in the engagement contour. The particular advantages lie in increased security against the screw coming loose and in the possibility of also inserting the screw through the plate at an inclination. Furthermore, a bone plate is proposed which has the shape of an arc of a circle in the longitudinal axis of the plate and which requires less bending, particularly on the human lower jaw, and adapts to the bone in a more ideal manner.

Blockable bone plate

The device for handling items (20) with a head (21) and a shank (22), such as screws, pins and the like, has a hand piece (1), which has a chamber (2) for receiving the items (20). From an inner side (11) of the chamber (2) there extends a guiding recess (14,17) to a dispensing side (3) of the hand piece (1), which recess has a cross-section adapted to the outer contour of the items (20) and, at the end on the dispensing side, an end portion (18) angled away with respect to a delivery portion (19) adjoining the chamber (2). The items (20) can be transferred from the chamber (2) to the dispensing side (3), for example by tilting with respect to the horizontal, the angling away of the end portion (18) with respect to the delivery portion (19) having the effect of creating a dispensing block, ahead of which the items (20) build up in the dispensing direction. When the hand piece (1) is tilted over, the items can in each case leave individually one after the other the guiding recess (14,17) on the dispensing side (3) via the end portion (18).

Devices for handling items with a head and a shank

A cutting pliers for cutting implant plates features two handgrips (10) joined via a hand-grip pivot (11), which handgrips actuate by way of leverage pivots (14) a pliers holding jaw (15) and a pliers punching jaw (16). Formed on the pliers holding jaw (15) are holding pins (19, 20, 21) adapted for entering matching recesses of the implant plates being cut. A cutting device (18) is fashioned on the pliers punching jaw (16). Implant plates of different implant systems, with half-round, burrless cuts, can be cut with said cutting pliers.

Cutting pliers for cutting implant plates

The present invention involves screwdriver having a grip, a driver blade insertable into and rotationally affixed to said grip and a chuck. The chuck encloses and is longitudinally displaceable relative to the driver blade. The chuck has collets extending from an end disposed near the blade tip. The collets have claws extending from their free ends which are adapted to retain a screw on the blade tip when the chuck is in a retaining position. The collets may be either inwardly biased or outwardly biased. A sleeve, for pressing the collets inward, is provided for embodiments employing outwardly biased collets. A stop device is provided for inhibiting the longitudinal displacement of the chuck towards the blade tip beyond the retaining position. The stop device comprises a groove in the blade shaft and a cooperating detent spring located on the chuck. The free end of the detent spring extends toward the blade tip and is biased inward so that it is disposed within the groove. When the chuck is in the retaining position the detent spring bears against a stop face of the groove thereby inhibiting further longitudinal displacement of the chuck relative to the blade.

Growing community of inventors

Ebringen, Germany

Michael Roth