As for this invention structure being simple, production cost is cheap, strength, it is superior in durability, it designates that the part dentures which can correspond to narrow Obe are offered as purpose. The part dentures 6 of this invention, denture on the denture floor through metal wire 16 10 which supports 8 and denture 8 and the denture floor 10, it possesses with the denture floor moving element 12 which, time motion possibly is supported provides salient 22 on the denture floor, 10 provides concave section 24 in denture floor moving element 12, when the time moving in the direction which closes denture floor moving element 12, after the part 28 of concave section 24 contacted salient 22, locus of the movement for the salient 22 of the part 28 when you supposed that metal wire 16 does not deform elasticity,Passes by inside salient 22.本発明は構造が簡単で、製造コストが安価であり、強度、耐久性に優れ、狭小部に対応することができる部分入れ歯を提供することを目的とする。本発明の部分入れ歯6は、義歯8と、義歯8を支持する義歯床10と、義歯床10に金属線16を介して回動可能に支持された義歯床可動部12とを有し、義歯床10に突出部22を設け、義歯床可動部12に凹部24を設け、義歯床可動部12を閉じる方向に回動したとき、凹部24の部分28が突出部22に接触した後の、金属線16が弾性変形しないと仮定した場合の部分28の突出部22に対する移動の軌跡が突出部22内を通る。
