| 摘要 |
A denture retention system includes a denture and an abutment. The denture has an inner channel with an elastic liner having shaped cavities. The cavities have a shaft, a radially outwardly extending ledge surface at the inner end of the shaft and an opening at the outer end of the shaft. The abutment has a shaft portion, a head portion at one end of the shaft portion and a threaded portion at the other end of the shaft portion. The head portion has an undercut surface that extends radially outwardly from the shaft portion. The ledge surface and undercut surfaces overlap and engage one another to retain the denture in the cavity. The threaded part of the abutment threads into an implant or implants into a jaw. The cavity expands when the abutment is inserted or removed from the cavity, and contracts after insertion.
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