Device and method for preparing calcium phosphate-based bone cement

• Main Authors: Mizutani, Yoichiro, Sawamura, Takenori, Hattori, Masateru, Okuyama, Masahiko
• Format: Patent
• Language: English
• Published: 09.04.2002

This invention relates to a device suitable for preparing by kneading a calcium phosphate-based cement which may be utilized as a dental or medical cement and for applying the resultant kneaded cement to a treatment site, and to a method for preparing a calcium phosphate-based cement. More particularly, the invention relates to a kneading device for preparing calcium phosphate-based cement and for applying the resultant kneaded cement to defective portions of bone, for example bone which has suffered fracture or osteoporosis, or applying the resultant kneaded cement as an adhesive for bonding artificial bone, such as that formed from metal or ceramic, to bone, as well as to a method for preparing the calcium phosphate-based cement. A kneading device adapted for preparing calcium phosphate-based cement and for applying the cement directly to a required site which comprises a cylinder which includes a hollow cylindrical body portion and a nozzle formed at the distal end of the cylindrical body portion; a plug having an axial through-hole slidably disposed within the proximal end of the cylindrical body portion; a piston assembly which includes a shaft extending through the through-hole of the plug for axial and rotatable movement, a kneading element at the distal end of the shaft within the cylindrical body portion, and a handle formed at the proximal end of the shaft external of the cylindrical body portion; a cover member attached to and forming a closure for the nozzle ; and a stop member for locating the plug in position at the proximal end of the cylindrical body portion.