ÉLÉMENT D'INSTRUMENT MÉDICAL, INSTRUMENT MÉDICAL, COMPOSANT D'INSTRUMENT MÉDICAL, PIÈCE À MAIN MÉDICALE, PROCÉDÉ DE FABRICATION D'ÉLÉMENT D'INSTRUMENT MÉDICAL, ET DISPOSITIF DE COUPE MÉDICAL
An object is to provide a medical instrument element, a medical instrument, a medical instrument component, and a medical handpiece processed in a complicated manner so as to provide a desired level of performance, and a method for producing the medical instrument element. A head housing (31) including a cooling path (50) permitting cooling water to flow therein and including a bent portion at which a flow direction of the cooling water is changed is formed by stack molding.