Oral hygiene and head and neck cancer (HNC)
• Cohort and case-control studies published in the English language were included.
• 52,863 patients: 33,000 without head and neck cancer (HNC) and 19,863 diagnosed with HNC.

Authors conclude:

• Poor oral hygiene was associated with HNC and the subsites.

Keywords: oral hygiene, head and neck cancer, cancer, oral cancer