Surviving tumour cells are then killed by either using cryosurgery such as liquid nitrogen to freeze the immediate border of the cyst. An alternative technique is to use 80% phenol. This is painted onto the cyst and then removed by absolute alcohol (with adequate irrigation to remove these toxic substances). The cycle is repeated three times.
The cavity of the cyst is then packed with either autogenous bone, or in a large cyst, allograft chips may be used.
