Abstract

The disclosure relates to a medical bone screw in particular in pedicle screw design comprising a screw-and-thread shaft which has a distal shaft portion of a preferably smaller core diameter that transitions into a proximal shaft portion of a preferably larger core diameter, whose proximal end is provided with a screw head. According to the invention, the core cross-sectional shape along the distal shaft portion is formed to be out-of-round, preferably polygonal, and the core cross-sectional shape along the proximal shaft portion is formed to be circular.

IPC Classes  ?

• A61B 17/70 - Spinal positioners or stabilisers
• A61B 17/86 - Pins or screws

Abstract

The invention relates to improving a surgical system for bonding bodily tissue, comprising a surgical instrument having a bonding device for bonding bodily tissue, said bonding device comprising two tool elements displaceable relative to each other, wherein the instrument comprises a cutting device having a cutting element for cutting through tissue, and the cutting element is displaceably disposed relative to at least one of the tool elements, such that the cutting device is implemented in the form of an HF cutting device, wherein the cutting element comprises a cutting edge defining a cutting plane at an angle relative to a longitudinal axis defined by the instrument in the region of the bonding device.

IPC Classes  ?

• A61B 17/11 - Surgical instruments, devices or methods, e.g. tourniquets for closing wounds, or holding wounds closed, e.g. surgical staples; Accessories for use therewith for performing anastomosis; Buttons for anastomosis
• A61B 18/14 - Probes or electrodes therefor
• A61B 17/064 - Surgical staples
• A61B 17/115 - Staplers