| 释义 |
post-ˈdam, v. Dentistry.
[f. posterior a. and n. + dam n.1]
trans. and absol. To construct a ridge along the upper posterior border of a palatal denture, which will press against the soft palate and form a seal. So post-ˈdamming vbl. n., the construction of such a ridge.
1910J. W. Greene Clin. Course Dental Prosthesis 47 We must have a way to post-dam, in such cases, without the patient's help. Ibid. 50 After you post-dammed its [sc. the impression's] rear end, it drops. Ibid., You over-strained the palate in post-damming. 1945F. W. Craddock Prosthetic Dentistry iii. 56. Finally, the upper impression is post-dammed with a further addition of softened wax or compound across the posterior palatal edge. 1953H. R. B. Fenn et al. Clin. Dental Prosthetics v. 115 Post-damming is a means of increasing pressure over an area in order, either to control an impression material, or to improve peripheral seal.
Hence post-dam (also post dam) n., a ridge of this kind.
1932E. H. Mauk in Turner & Anthony Amer. Textbk. Prosthetic Dentistry (ed. 6) iii. 133 Dr. J. Ewell Neal..makes special reference to the notch or groove in the bone posterior to the tuberosity on each side where the quantity and character of the soft tissue are such as to tolerate, without injury, more ‘post-dam’ than was usually employed. 1940M. G. Swenson Compl. Dentures xiii. 167 The anterior line of the post dam area is determined by palpating in the mouth, in order to keep the post dam pressure on soft tissue. 1945F. W. Craddock Prosthetic Dentistry iii. 65 The post-dam extends from tuberosity to tuberosity and will generally be about 1/8 inch wide and 1/32 to 1/16 inch deep. 1953H. R. B. Fenn et al. Clin. Dental Prosthetics x. 277 Indirectly the post-dam seal influences phonation, for if it is inadequate the denture may become unseated during the formation of those sounds having an explosive effect. 1976R. M. Basker et al. Prosthetic Treatm. Edentulous Patient ix. 110 This projection, the post-dam, compresses the palatal mucosa once the denture is placed in the mouth and thus creates a border seal. |