<prompt> All of the following are the uses of given instrument except :Harvesting Temporalis fasciaSelf retaining and haemostaticIn mastoidectomy to retract soft tissues after incisionHelps in removal of bone  <response>: Mollisons mastoid retractor Self retaining mastoid retractor with four prongs on either blade USES- Harvesting Temporalis fascia Used in mastoidectomy to retract soft tissues after incision and elevation of flaps It is self retaining and haemostatic Mastoid Gouge -Help in removal of bone Perkins mastoid retractor has 1x3 prongs 