Medically reviewed by Jennifer Steinhoff, MD Key Takeaways The humerus is the only bone in the upper arm. It connects to the shoulder and elbow joint.The humerus works with muscles to raise and rotate ...

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 ...