| 摘要 |
A complete denture is disclosed for both maxillary and mandibular prostheses of the type having a hard base structure formed of acrylic plastic into which prosthetic teeth are set, the hard base structure fused to a deflectable tray layer of thermo plastic material which is deflectable when warm to adapt the denture to the general contours of the maxillary or mandibular ridges, a subsequent coating of autopolymerizing acrylic plastic being applied to the tray providing precise fitting of the denture to the oral contours of the wearer and stabilizing the soft deflectable tray in its newly achieved configuration. The hard base structure disclosed provides a tight bond to the prosthetic teeth and holds them securely in position in the occlusal plane but features a segmentation which allows lateral adjustment in the relative position of the posterior prosthetic teeth in each segment with respect to the teeth in the other segments to thus provide a capability for adjusting the prosthetic teeth to the maxillary or mandibular residual ridges. The segmentation in the preferred embodiment is provided by extending a thin juncture of deflectable material between two anterior teeth, i.e., the central incisors, to allow each half of the denture to be laterally shifted with respect to the other during fitting of the denture. Also disclosed, in the maxillary denture, is a pleat formed in that portion of the deflectable tray layer forming the palatal vault which serves to accommodate any shifting in position of the respective hard base structure segments. An alternate embodiment discloses the segmentation of the hard base structure into three segments, a first segment into which are mounted the anterior prosthetic teeth and two posterior teeth carrying segments. In the method of fitting the denture, the segments are laterally adjusted during fitting operation with respect to each other to align the prosthetic teeth with maxillary and mandibular ridges. The resulting denture may be either directly used as a prosthesis or used as a model in constructing a final prosthesis.
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