Host: The Japanese Society for Dental Materials and Devices
Calcium phosphates have been subjects of the intensive research in the last decades. There are two types of calcium phosphate materials: Bioactive and bioresorbable. For example, sintered hydroxyapatite has been described as bioactive but nonresorbable. Biphasic calcium phosphate, calcium phosphate cements that form precipitated hydroxyapatite or other calcium phosphate phases, certain calcium phosphate coatings, bioglass are bioresorbable. Bioactive materials are biocompatible, and are directly bonded to bone. Bioresorbable materials are biocompatible and are resorbed by osteoclast, leading to new bone formation. A calcium phosphate cement consisting of tetracalcium phosphate and dicalcium phosphate anhydrous or dicalcium phosphate dihydrate reacts with water to harden and form nano-HA crystals as product, as a result it is biocompatible and bioresorbable. Therefore, these calcium phosphate biomaterials are useful in medical and dental applications. These include: an endodontic filling material, an implant material for periodontal bone defects and alveolar ridge augmentation, a coating material to stabilize metal implants. The presentations given in this symposium will highlight some of the most important advances in the use of electrochemical deposition or chemical precipitation methods to form calcium phosphate coatings on metal surfaces and in calcium phosphate cements.
