Medical drill device and medical drill system
A medical drilling apparatus includes a cannulated drill having a longitudinal channel extending coaxially with the longitudinal axis of the drill. The drilling apparatus has, at a proximal end, a drilling apparatus coupling portion for coupling to a handle or a drilling machine in a rotationally fixed manner. The drilling apparatus also has a mandrin with a distal mandrin portion and a proximal mandrin portion. The distal mandrin portion is configured for inserting and closing the longitudinal channel of the drill over the entire or substantially the entire length of the longitudinal channel of the drill in a drilling position. The drill includes, in the region of its proximal end, a drill coupling portion that forms the drilling apparatus coupling portion together with the proximal mandrin portion. The medical drilling apparatus can be part of a medical drilling system.
1 . A medical drilling apparatus comprising:
wherein each at least one mandrin entraining face comprises a planar surface
a drill that is cannulated, the drill comprising a longitudinal channel extending coaxially with a longitudinal axis of the drill;
a drilling apparatus coupling portion at a proximal end of the medical drilling apparatus, the drilling apparatus coupling portion configured for coupling to a handle or a drilling machine in a rotationally fixed manner; and
a mandrin comprising a proximal mandrin portion and a distal mandrin portion,
the distal mandrin portion configured for inserting into and closing the longitudinal channel of the drill over a length of the drill in a drilling position,
the drill further comprising a drill proximal end, a drill distal end, and a drill coupling portion in a region of the drill proximal end, and
the drill coupling portion and the proximal mandrin portion forming the drilling apparatus coupling portion,
wherein the drill coupling portion has at least one drill entraining face extending parallel to the longitudinal axis, wherein the proximal mandrin portion has at least one mandrin entraining face extending parallel to the longitudinal axis, and wherein the at least one drill entraining face and the at least one mandrin entraining face abut against one another in face-to-face contact in the drilling position to thereby prevent relative rotation between the drill and the mandrin about the longitudinal axis, wherein each at least one mandrin entraining face comprises a planar surface.
2 . The medical drilling apparatus according to claim 1 , wherein the drilling apparatus coupling portion is of rotationally asymmetrical configuration with respect to the longitudinal axis.
3 . The medical drilling apparatus according to claim 1 , wherein the drill coupling portion comprises a coupling slot extending in parallel to the longitudinal axis, and wherein the proximal mandrin portion engages into the coupling slot in the drilling position.
4 . The medical drilling apparatus according to claim 3 , wherein, the coupling slot has two mutually facing slot faces that form the at least one drill entraining face, and the mandrin has two mutually opposed outer faces that form the at least one mandrin entraining face.
5 . The medical drilling apparatus according to claim 1 , wherein the drilling apparatus coupling portion has a coupling face that extends in parallel to the longitudinal axis and transversely to the at least one drill entraining face.
6 . The medical drilling apparatus according to claim 5 , wherein the coupling face is of planar or substantially planar configuration and comprises at least two coupling face portions, wherein at least one of the at least two coupling face portions is formed by a side face of the drill coupling portion, and wherein at least one further one of the at least two coupling face portions is formed by a side face of the proximal mandrin portion.
7 . The medical drilling apparatus according to claim 1 , wherein the at least one mandrin entraining face and the at least one drill entraining face extend in parallel to a mirror plane containing and parallel to the longitudinal axis.
8 . The medical drilling apparatus according to claim 1 , wherein the distal mandrin portion has a cross-section that corresponds to a cross-section of the longitudinal channel.
9 . The medical drilling apparatus according to claim 1 , wherein the drilling apparatus coupling portion is of mirror-symmetrical configuration relative to a mirror plane containing and parallel to the longitudinal axis.
10 . The medical drilling apparatus according to claim 9 , wherein the drill coupling portion and the proximal mandrin portion are each of mirror-symmetrical configuration relative to the mirror plane.
11 . The medical drilling apparatus according to claim 1 , wherein a depth stop for the mandrin is arranged or formed on the drill for delimiting an insertion depth of the distal mandrin portion into the longitudinal channel.
12 . The medical drilling apparatus according to claim 11 , wherein the depth stop comprises a stop face of the drill pointing in a proximal direction, the proximal mandrin portion comprises a distal side, and the distal side of the proximal mandrin portion abuts against the stop face of the drill in the drilling position.
13 . The medical drilling apparatus according to claim 1 , wherein the drilling apparatus coupling portion has a rotationally symmetrical basic shape and a lateral flattened portion extending in parallel to the longitudinal axis.
14 . The medical drilling apparatus according to claim 1 , wherein the drill coupling portion and the proximal mandrin portion are each individually of rotationally asymmetrical configuration with respect to the longitudinal axis.
15 . The medical drilling apparatus according to claim 1 , wherein at least one coupling element is arranged or formed on the drilling apparatus coupling portion for predetermining an axial position of the medical drilling apparatus and a handle or a drilling machine relative to one another.
16 . The medical drilling apparatus according to claim 15 , wherein the at least one coupling element:
points in a radial direction;
comprises a coupling projection or a coupling receptacle;
at least partially surrounds the longitudinal axis; and/or
is interrupted by a flattened portion, wherein the drilling apparatus coupling portion has a rotationally symmetrical basic shape and the flattened portion extends in parallel to the longitudinal axis.
17 . The medical drilling apparatus according to claim 1 , wherein at least one handling element is arranged or formed on the proximal mandrin portion.
18 . The medical drilling apparatus according to claim 1 , wherein the drill coupling portion has two drill entraining faces, and wherein the proximal mandrin portion has two mandrin entraining faces.
19 . A medical drilling system comprising:
the medical drilling apparatus according to claim 1 ; and
a handle and/or a drilling machine for coupling to the medical drilling apparatus in a rotationally fixed manner.
20 . The medical drilling system according to claim 19 , wherein:
a) the medical drilling system comprises at least one K-wire; and/or
b) the handle and/or the drilling machine comprise a coupling device for coupling to the drilling apparatus coupling portion in a force-locking and/or positive-locking manner in a coupling position.