Grafting technique that aims to rapair a grafting. It is used when the root system of the tree has not been damaged, but there is injury to the trunk. The wounded area has to be trimmed back t healthy, undamaged tissue by removing dead or torn bark; then, every 5 to 7.5cm (2 to 3in.) around the injured section a scion is inserted, attached at both the upper and lower ends into live, undamaged bark. After all the scions have been inserted, the cut surfaces must be thoroughly covered with grafting wax.