PROBLEM TO BE SOLVED: To provide a denture system installed and removed by a wearer himself/herself and further improving comfort during the wearing thereof.SOLUTION: A prosthesis 12 in a denture system comprises a recessed contact surface 58a that is brought into contact with the gums 24. At a front tooth section in a first reference cross section including a first reference line, when an intersection of the contact surface 58a and a straight line connecting the center of an artificial tooth 32 and a position offset from the bottom section of the artificial tooth 32, parallel to the first reference line by 3 mm to the palate side or to the tongue side is defined as a first point, a distance d1 between the first point and the outer edge of the prosthesis 12 on the palate side or on the tongue side satisfies d1≤20 mm, and, at a molar section, when an intersection of the contact surface 58a and a straight line connecting the center of an artificial tooth and a position offset from the bottom section of the artificial tooth, parallel to the first reference line by a/2 ((a) is the buccolingual diameter of the artificial tooth in the first reference cross section) to the palate side or to the tongue side is defined as a second point, a distance d2 between the second point and the outer edge of the prosthesis 12 on the palate side or on the tongue side satisfies d2≤20 mm.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の頬舌径）ずれた位置と人工歯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
