PROBLEM TO BE SOLVED: To provide a partial denture capable of being attached and also detached without cutting the remaining teeth and the alveolar bone like a crown bridge and an implant, and furthermore, without using a denture base like a partial plate denture.SOLUTION: A partial denture 1 concerning the present invention includes: an artificial tooth 10； an engagement member for supporting the artificial tooth 10, configured in an opening/closing manner, and engaged with the inside of toothing in a closed state； and a lock structure 14 for fixing the closed state of the engagement member in a releasable manner. The engagement member includes: a first engagement part 20 engaged with an inclined part inclining to a direction being spread as going to the tooth root of each of multiple teeth in the toothing； a second engagement part 30 engaged with an undercut part inclining to an opposite side to the inclined part of at least one tooth in the toothing； and a third engagement part engaged with a region serving as resistance to the movement to the inside of at least one tooth in the toothing.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2020,JPO&INPIT【課題】クラウンブリッジやインプラントのように残存歯や歯槽骨の切削を伴わず、しかも、部分床義歯のように義歯床を用いることなく装着することができて、取り外しも可能な部分義歯を提供する。【解決手段】本発明に係る部分義歯１は、人工歯１０と、人工歯１０を支持し、開閉可能に構成され、閉状態において、歯列の内側に係合する係合部材と、係合部材の閉状態を解除可能に固定するためのロック構造１４とを備え、係合部材は、歯列における複数の歯のそれぞれの、歯根に向かうほど広がる方向に傾斜する傾斜部に係合する第一の係合部２０と、歯列における少なくとも一つの歯の、傾斜部とは反対側に傾斜するアンダーカット部に係合する第二の係合部３０と、歯列における少なくとも一つの歯の、内側への移動に対して抵抗となる部位に係合する第三の係合部とを備える。【選択図】図２
