Apparatus and methods for treatment of arthrosis or osteoarthritis in a joint of a mammal or human patient

A method for treatment of arthrosis in a joint of a mammal or human patient, the method comprising:

• feeding a volume of a biocompatible material in liquid form into a reservoir (110) located outside of a body containing a joint (J) to be treated,
• inserting into the joint (J) an instrument (120) having a general tube shape, a distal end (D) of the instrument (120) being configured to be inserted into the joint (J), and a proximal end (P) of the instrument (120) being connected to the reservoir (110),
• receiving the liquid material from the reservoir (110) in the instrument (120),
• feeding the liquid material from the proximal end (P) to the distal end (D) of the instrument (120), and
• deposing the material on at least one damaged surface (S) of the joint (J), the material being configured to assume a solid form under predefined conditions, and when in the solid form the material having a resistance to wear adapted to replace a worn out joint surface, wherein said biocompatible material has a temperature higher than 90° C. when entering the joint.