Hydroxyapatite (HA) is an inorganic mineral present in human bone and teeth. It plays a role in the structural strength of bone and in bone regeneration. While it occurs naturally in bone, healthcare ...

Just how many teeth do humans have? We take a bite out of the science to help you digest the facts. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...

Teeth first evolved as sensory organs, not for chewing, according to a new analysis of animal fossils. The first tooth-like structures seem to have been sensitive nodules on the skin of early fish ...

Human beings smile for a number of reasons. You may smile when you spot your long-lost bestie in baggage claim, when you engage your co-workers during a presentation, or when you imagine your ex’s ...