Volume 1

A work on operative dentistry ... / by G.V. Black ; with revision by Arthur D. Black.

  • Greene Vardiman Black
Date:
1924
Catalogue details

Licence: Public Domain Mark

Credit: A work on operative dentistry ... / by G.V. Black ; with revision by Arthur D. Black. Source: Wellcome Collection.

    446/480 page 290
    Excavator. A cutting instrument having a sharp blade, shank, and shaft or handle, for use in the preparation of cavities in teeth for the reception of fillings. Extension for prevention. Extension for the prevention of the recurrence of decay after a filling has been made. This extension is always to be made in the preparation of proximal and gingival third cavities. In each case the extension is toward the axial line angles of the tooth for the reason that the regions of these angles are the least liable to the beginnings of caries of any portion of the circum¬ ference of the tooth near the free margins of the gingivae. Facet. On the teeth; a worn spot made by the rubbing of the proximal sur¬ faces of adjoining teeth. A slight loss of the substance of the enamel in the begin¬ ning of erosion, etc. A facet may also be made by grinding with a fine stone. Facets occur on the occlusal surfaces of the teeth from wear. Ferment. A substance which causes chemical and physical changes in fer¬ mentable substances with which it comes in contact. Certain soluble ferments, as pepsin, pancreatin, ptyalin, etc., induce an action similar or identical with digestion; but do not induce further changes. The living ferments, microorganisms, carry the process to its ultimate ends by converting the fermentable substances into other chemical compounds. Fermentation. Chemical and physical changes induced by certain micro¬ organisms. A form of decomposition. There are a number of distinct fermentations, as vinous fermentation, lactic fermentation, acetic fermentation, etc. Festoon. An enlargement of that part of the interproximal gingivse occupying the embrasures at the angles of the teeth buccally and lingually, but more commonly only the buccal portion. Fibrils, dentinal. The fibrils occupying the dentinal canals. See Fibrils of Tomes. Fibrils of Tomes. The prolongations from the odontoblasts which occupy the dentinal canals. They reach from the pulp chamber to the enamel or cementum. See Dentinal fibrils. Filling, n. The material placed in a cavity in a tooth; the resultant of the act of placing a filling. Syns.: A plug; a stopping. Filling, v. The act of placing filling materials into a cavity of the tooth or roots of teeth. Syns: Plugging; stopping. Finger positions. The positions of the fingers in performing dental operations. A systematization of the nomenclature of finger positions. See Figures 46-61, inclu¬ sive, Vol. 2. Fissure. A fault in the surface of a tooth caused by the imperfect joining of the enamel of the different lobes. Fissures occur along the lines of the developmental grooves, and more rarely along the lines of supplemental grooves. Fissure bur. A bur in the form of a solid cylinder with even, straight or parallel surfaces. See Figure 137, Vol. 2. Fissure cavity. A cavity beginning along the line of a fissure. The terms ‘1 pit cavities ’ ’ and 11 fissure cavities; ’ are often used. Fistula. [L] A reed, or pipe. An abnormal opening from a normal cavity to the surface for the discharge of a normal secretion. “In pathology, a narrow passage or duct, formed by disease or injury, leading from an abscess to a free surface, or furnishing an abnormal means of egress from some normal cavity, as in vesico-vaginal fistula. ” Century Dictionary. ‘ ‘ (Medical.) A long, sinuous pipe-like ulcer, with a narrow orifice and without disposition to heal. Hoblyn. Fistulse have different names according to the discharge which they afford, and the organs in which they are seated, as lachrymal, biliary, salivary, synovial, urinary. Dunglison. ” Worcester. “ (Medical.) A permanent abnormal opening into the soft parts with a constant discharge; a deep, narrow, chronic abscess; an abnormal opening between an internal
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