A system for treating osteoarthritis in a joint of a mammal or a human patient, by replacing damaged bone, the system comprises: a biocompatible material to replace damaged bone of a worn joint surface, where the biocompatible material is configured to assume a solid form under predefined conditions, and when in solid form has wear resistance, a reservoir (110) configured to contain a volume of a biocompatible material in liquid form having a temperature greater than 100 ° C outside a body containing a joint (J) to be treated, and an instrument (120) having a general tube shape, a distal end (D) of the instrument (120) is configured to be inserted into the joint (J), an end Proximal (P) of the instrument (120) is connected to the reservoir (110) and configured to receive the liquid material from it, where the instrument (120) is It is configured to feed the liquid material having a temperature greater than 100 ° C from the proximal end (P) to the distal end (D) for deposition on at least one damaged surface (S) of the joint (J), so that the adjacent nerves are damaged by the heat of the material, thus preventing pain from the damaged surface.Un sistema para tratamiento de artrosis en una articulación de un mamífero o un paciente humano, por sustitución de hueso dañado, el sistema comprende: un material biocompatible para sustituir hueso dañado de una superficie de articulación desgastada, en donde el material biocompatible está configurado para asumir una forma sólida en condiciones predefinidas, y cuando está en forma sólida tiene resistencia al desgaste, un depósito (110) configurado para contener un volumen de un material biocompatible en forma líquida que tiene una temperatura superior a 100 °C fuera de un cuerpo que contiene una articulación (J) que va a ser tratada, y un instrumento (120) que tiene una forma general de tubo, un extremo distal (D) del instrumento (120) está configurado para ser insertado en la articulación (J), un extremo proximal (P) del instr
