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Precision partial denture attachments designed to attach the partial denture to receptacles that are externally connected to the crown contour. These attachments are typically two-component devices that attach to each other with a high degree of precision: one component is externally fixed to the abutment teeth and a second component is an integral part of the partial denture base (frequently made of a high-density plastic). Rigid and resilient attachments are available that permit a slight vertical, hinging, and/or rotational movement as the patient bites.
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