A medical DC-impulse generator of a medical/surgical bipolar fragmentation device, operating on direct electric current, and adapted to fragment medical implants that are made of an electrically conductive material, comprising an electric current source and an electric current control device with the DC-impulse generator being adapted to be connected to a medical endoscopic instrument having at least two electrodes at its distal end portion, which are adapted to physically contact the medical implant, and to apply a direct electric current of predetermined or adjustable strength in a pulsed or timed way to the electrodes, such that the electric current flows from one electrode to the other electrode via the implant material and thereby applies electrical energy onto the implant material for cutting said material in a cutting process, said electric current control device of the medical DC-impulse generator has a first control portion or an implemented first control process being adapted to apply in a first phase (to-ti) an electric current after physical contact between the electrodes of the medical endoscopic instrument and the medical implant is established for melting the implant material and characterised by a second control portion or an implemented second control process being adapted to maintain in a second phase (t 1 -t 2) the current flow through the implant material after a loss of the physical contact between at least one of the electrodes and the implant material maximal for a predetermined maintaining duration, wherein the predetermined maintaining duration is pre-adjusted or pre-adjustable to a value safely avoiding re-solidification of the implant material before the separation / dissection of the implant segments is completed. an electric current source and an electric current control device with the DC-impulse generator being adapted to be connected to a medical endoscopic instrument having at least two electrodes at its distal end portion, which are adapted to physically contact the medical implant, and to apply a direct electric current of predetermined or adjustable strength in a pulsed or timed way to the electrodes, such that the electric current flows from one electrode to the other electrode via the implant material and thereby applies electrical energy onto the implant material for cutting said material in a cutting process, said electric current control device of the medical DC-impulse generator has a first control portion or an implemented first control process being adapted to apply in a first phase (to-ti) an electric current after physical contact between the electrodes of the medical endoscopic instrument and the medical implant is established for melting the implant material and characterised by a second control portion or an implemented second control process being adapted to maintain in a second phase (t 1 -t 2) the current flow through the implant material after a loss of the physical contact between at least one of the electrodes and the implant material maximal for a predetermined maintaining duration, wherein the predetermined maintaining duration is pre-adjusted or pre-adjustable to a value safely avoiding re-solidification of the implant material before the separation / dissection of the implant segments is completed.