Denture retaining bar and system

A denture retaining system comprising:

• a denture bar constructed for affixation to a human, the denture bar having
• a distal end,
• a lingual-side surface,
• a vestibular-side surface,
• a bone-facing surface and
• a superstructure-facing surface that is opposite the bone-facing surface,
• wherein the bone-facing surface at the distal end is relieved from the superstructure-facing surface at the distal end by a first angle of between 10° and 25° measured relative to an axis perpendicular to a longitudinal plane passing through the lingual side and vestibular side surfaces of the denture bar;
• wherein an anterior portion of the superstructure-facing surface is relieved from a corresponding anterior portion of the vestibular side surface by an anterior angle that is within 5° of the first angle and
• an overdenture superstructure having a distal surface that substantially conformingly mates to the distal end of the denture bar when the overdenture superstructure is positioned against the superstructure-facing surface of the denture bar, and is coupled to the denture bar by no more than two attachment elements located only on the superstructure-facing surface at a position on the denture bar to an anterior side of a first molar position.