Hydroxyapatite (HAp) is a naturally occurring mineral of biological and agricultural importance. It is a member of calcium phosphate, and it has a Ca/P ratio of 1.67 which is identical to bone apatite. The common mineral apatite has formula Ca5(PO4)3X, where X is F, Cl, OH, or a mixture; it is hydroxyapatite if the extra ion is mainly hydroxide. Up to 50% by volume and 70% by weigh of human bone is a modified form of HAp, known as bone mineral. The main substance of our teeth is HAp (97 % of enamel and 70 % of dentin). Due to its similarity in size, crystallography and chemical composition with human hard tissue, HAp is one of the most widely studied materials for orthopedic and dental implants. HAp could be prepared from natural or synthesized sources via several processes, and can be made as a powder.

Matexcel provides HAp in different dimensions, from nano to micro sizes, as well as different grades such as research, medical and food grades.