PROBLEM TO BE SOLVED: To improve a comfortable wearability by allowing a wearer to attach or detach the invention by himself/herself.SOLUTION: A prosthesis 12 of the denture system 1 includes a concave contact face 58a which comes into contact with a gum 24. On a first referential cross-section including a first referential line, at a front teeth part, a distance d1 between a first point and an outer edge of the prosthesis 12 on a palatal side or a tongue side is d1≤20 mm, in which the first point is an intersection point of the contact face 58a and a line between a center of an artificial tooth 32 and a point 3 mm shifted from the bottom part of the artificial tooth 32 toward the palatal side or the tongue side in parallel with the first referential line. Also, at a molar part, a distance d2 between a second point and an outer edge of the prosthesis 12 on a palatal side or a tongue side is d2≤20 mm, in which the second point is an intersection point of the contact face 58a and a line between a center of the artificial tooth 38 and a point shifted by a/2 (a is a cheek-tongue diameter of the artificial tooth 38 in the first referential cross-section) from the bottom part of the artificial tooth 38 toward the palatal side or the tongue side in parallel with the first referential line.SELECTED DRAWING: Figure 5【課題】 装着者自身が着脱でき、装着時の快適性をより向上させる。【解決手段】 義歯システム１の補綴物１２は歯肉２４に接触する凹状の接触面５８ａを有する。第１基準線を含む第１基準断面において、前歯部では、人工歯３２の最底部から第１基準線と平行に口蓋側又は舌側に３ｍｍずれた位置と人工歯３２の中央とを結んだ直線と、接触面５８ａとの交点を第１の点とすると、第１の点と口蓋側又は舌側における補綴物１２の外縁との距離ｄ１はｄ１≦２０ｍｍであり、かつ、臼歯部では、人工歯３８の最底部から第１基準線と平行に口蓋側又は舌側にａ／２（ａは第１基準断面における人工歯３８の頬舌径）ずれた位置と人工歯３８の中央とを結んだ直線と、接触面５８ａとの交点を第２の点とすると、第２の点と口蓋側又は舌側における補綴物１２の外縁との距離ｄ２は、ｄ２≦２０ｍｍである。【選択図】 図５
