PR in Person, Inc.

09/07/2026

09/06/2026

People with more healthy or treated teeth tend to live longer than those with fewer, a large Japanese study of over 190,000 adults aged 75 and older has found.

Researchers tracked dental checkup records against death records over several years. People with zero remaining teeth had about 70% higher mortality risk than those with 21 or more. But the study's key finding was more specific: healthy and properly treated teeth were linked to lower mortality, while untreated decayed teeth were linked to higher mortality — meaning it's not just tooth count that matters, but whether those teeth are healthy or being cared for.

Researchers suggest this may reflect broader effects of oral health on the body, such as easier chewing supporting better nutrition, or chronic infection and inflammation from untreated decay affecting overall health — though this study didn't test those mechanisms directly.

Source: Otsuki et al., BMC Oral Health (2025). DOI: 10.1186/s12903-025-07275-6

09/06/2026

What you're looking at is a cross-section of a human tooth — one of nature's most remarkable engineering achievements.

The outermost layer, enamel, is the hardest substance in the human body. Composed of about 96% mineral, it protects the tooth from daily wear, chewing forces, and acidic challenges.

Beneath the enamel lies dentin, a living tissue filled with thousands of microscopic tubules. These tiny channels transmit sensations such as heat, cold, and pain toward the center of the tooth.

At the core is the pulp — a living chamber containing blood vessels and nerves that nourish the tooth and keep it responsive throughout life.

The tooth is anchored to the jaw by its root, covered by cementum and connected to the surrounding bone through the periodontal ligament, a specialized tissue that acts like a shock absorber during chewing.

Strong as stone, yet alive and sensitive, every tooth is a masterpiece of biological design. Beyond helping us eat, teeth support speech, facial structure, and overall quality of life.