Health

Natural tooth count is linked to pancreatic cancer surgery survival, study finds

A single-center study found patients with at least 21 teeth lived nearly two years longer following resection than those with fewer teeth.

Updated Aug 24, 2026 · 00:33 UTC1 reports

The short version

A study from Hiroshima University observed that pancreatic cancer patients with 21 or more natural teeth had a median survival of 60.7 months post-surgery, compared to 39.1 months for those with 20 or fewer.
Researchers hypothesize that tooth loss may serve as an indicator of cumulative chronic inflammation, frailty, and systemic resilience over decades rather than simply measuring chewing ability.
The findings stem from a single Japanese medical center and require validation through broader multicenter international trials.

Researchers evaluated 339 consecutive patients who underwent radical pancreatectomy for pancreatic ductal adenocarcinoma at Hiroshima University Hospital between 2014 and 2022.[ScienceDaily]
Patients with at least 21 natural teeth had a median overall survival of 60.7 months, compared to 39.1 months for those with 20 or fewer natural teeth.[ScienceDaily]
The correlation between tooth count and survival remained statistically significant after adjusting for cancer stage, lymph node metastasis, chemotherapy, surgical margins, and nutritional status.[ScienceDaily]
Chewing function evaluated by posterior teeth occlusion was not independently linked to patient survival.[ScienceDaily]
The study was published in the Journal of Hepato-Biliary-Pancreatic Sciences.[ScienceDaily]

Because the study was conducted at a single hospital and exclusively involved patients of Japanese ethnicity, the generalizability of the findings to broader and international populations remains unverified.[ScienceDaily]
The exact biological mechanisms connecting oral bacteria, chronic inflammation, and pancreatic cancer progression are not fully understood.[ScienceDaily]