Poor oral health and irregular dental checks can increase the risk of oral cancer, a new study has found.
The International Agency for Research on Cancer report also found excessive use of mouthwash - more than three times a day - can also increase risk.
Smoking, heavy drinking and "low socio-economic status" are established risk indicators of mouth and throat cancers. The study covered 1,962 cancer patients and a further 1,993 control subjects across nine countries in Europe.
The study was led by the Leibniz Institute for Prevention Research and Epidemiology in Bremen, Germany, (Bips) and backed by researchers from Glasgow University Dental School.