| 摘要 |
A dental fastening device is disclosed for fastening a wax substructure of a subsequently fabricated dental bridge adjacent to a first and second dental die during the fabrication and shaping of the wax coping or substructure. The substructure includes a pontic portion disposed between a first and a second abutment portion. The fastening device inhibits relative movement between the pontic and abutment portions during solidification and shrinkage of the substructure. The fastening device comprises a first elongate tie down member having a first and a second end. The first end of the first tie down member is anchored to the lingual face of a cast adjacent to the first die and the second end of the first tie down member is anchored to the buccal face of the cast adjacent to the first die. The first tie down member extends from the lingual face of the cast over the occlusal surface of the first abutment portion and around the buccal face of the cast. A second tie down member includes a first and a second end, the second member fastening the second abutment portion of the wax substructure against movement relative to the second die. The second tie down member extends around the second abutment portion of the substructure such that during the hardening and inherent shrinkage of the wax substructure, the first and second tie down member cooperate together for inhibiting relative movement between the pontic portion and the adjacent abutment portions of the wax substructure so that the subsequently fabricated dental bridge will be an accurate fit.
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