Patella preparation system

A patella preparation system comprising:

• a fixing device being adapted to hold a patella, wherein the fixing device comprises a central connecting portion, an upper fixing portion configured to contact an anterior surface of the patella and a lower fixing portion configured to contact a posterior surface of the patella, the upper fixing portion and the lower fixing portion being parallel distanced to each other and being connected to the central connecting portion,
• a guiding device which is linked to the fixing device to be moveable relative to the fixing device by translatory and tilting movements/motions, wherein the guiding device is adapted to guide a cutting instrument used to perform a resection on the patella, and the guiding device is movable in a direction parallel to a length axis of the central connecting portion and is inclinable relatively to the upper fixing portion and the lower fixing portion, and
• an operation device for manually moving the guiding device relative to the fixing device individually and separately in a translatory and a tilting manner, wherein the fixing device, the guiding device, and the operation device are each provided as individual and separate parts of the patella preparation system, and
• the operation device comprises:
• a cutting height adjustment device which is configured to position the guiding device in a height with respect to the patella such that the cutting instrument can perform the resection on the patella with a preferred cutting height, and
• a cutting angle adjustment device for adjusting an angle of the guiding device with respect to at least the upper fixing portion of the fixing device and hence to the patella separately to the cutting height adjustment device such that the cutting instrument can perform the resection on the patella in a preferred angle.

A patella preparation system comprising:

• a fixing device being adapted to hold a patella, wherein the fixing device comprises a central connecting portion, an upper fixing portion configured to contact an anterior surface of the patella and a lower fixing portion configured to contact a posterior surface of the patella, the upper fixing portion and the lower fixing portion being parallel distanced to each other and being connected to the central connecting portion,
• a guiding device which is linked to the fixing device to be moveable relative thereto by translatory and tilting movements/motions, wherein the guiding device is adapted to guide a cutting instrument used to perform a resection on the patella and the guiding device is movable in a direction parallel to a length axis of the central connecting portion and is inclinable relatively to the upper fixing portion and the lower fixing portion, and
• an operation device for manually moving the guiding device relative to the fixing device individually and separately in a translatory and a tilting manner, wherein
• the operation device comprises:
• a cutting height adjustment device which is configured to position the guiding device in a height with respect to the patella such that the cutting instrument can perform the resection on the patella with a preferred cutting height, and
• a cutting angle adjustment device for adjusting an angle of the guiding device with respect to at least the upper fixing portion of the fixing device and hence to the patella separately to the cutting height adjustment device such that the cutting instrument can perform the resection on the patella in a preferred angle, wherein
• the guiding device is embodied in form of a disk with a concentric and hollow cylindrical hole defining an inner cylindrical surface, a diameter of the concentric and hollow cylindrical hole being at least as large as a maximum diameter of the patella, while the disk is provided with a slot which extends at least partially along a periphery of the disk and extends in a radial direction of the disk from a shell surface of the disk to the inner cylindrical surface of the disk, while the slot is at least as high as being able to accommodate a working end of the cutting instrument, and the disk is fixedly connected with a cutting height adjustment axle.