I am using "Sensodyne" Rapid Relief toothpaste as advertised on TV here in New Zealand. It works and does provide short term pain relief and is an excellent pseudo mouthwash.

Osteosarcoma radiotherapy right forequarter amputation 1961
Carcinoma of Right Larynx with subglottic extension
Total laryngectomy with right radical neck dissection 2000
Tracheostomy
Radiotherapy June-July 2001
Aggressive recurrence of the same May 2013
Neck Fistulas June 2013
P.E.G July 2013
Mi-key Oct 2013
Currently Chemo was : XELODA (Capecitabine) Now Carboplatin and now Gemcitabine !