| 释义 |
ˈpontic, a.2 and n. Anat. and Path.
[f. L. pons, pont-em bridge + -ic.]
A. adj. Pertaining to the pons Varolii (see pons 2): = pontal, pontile, pontine.
1890Lancet 5 Apr. 739/2 The only case over forty being one of pontic abscess.
B. n. Dentistry. An artificial tooth that forms part of a dental bridge, being held in place by attachment to its neighbouring teeth, and not fixed directly to the jaw.
1916J. H. Prothero Prosthetic Dentistry (ed. 2) xxix. 785 The term ‘pontic’ has been suggested as a substitute for ‘dummy’ in describing a bridge tooth replacement. The term seems scarcely appropriate, since practically all fixed bridges are of the rigid truss type. 1932F. R. Felcher Art of Porcelain in Dentistry xi. 133 Pontics should not be so built that they extend too far into the sockets, as a recession will usually result if this is done. 1956J. N. Anderson Appl. Dental Materials xiii. 128 When making a bridge, the ‘pontic’ or bridging part is joined to the supports or ‘retainers’. 1974D. H. Roberts in Harty & Roberts Restorative Procedures Practising Dentist xxii. 327 Where metal-ceramic full crowns are used as retainers then the same material is normally employed for the pontic. |