| SAS | sarcoma amplified sequence; self-rating anxiety scale; short arm splint; Sklar Aphasia Scale; sleep ... |
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| SCS | Saethre-Chotzen syndrome; shared computer system; silicon-controlled switch; Society of Clinical Sur... |
| SLS | segment long-spacing; short-leg splint; single limb support; Sjogren-Larsson syndrome; stagnant loop... |
| labial | <dentistry> The tooth surface next to your lips or things mounted on the tooth surfaces next to your lips. (08 Jan 1998) |
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| labial arch | An orthodontic arch wire that approximates the labial surfaces of the teeth. (05 Mar 2000) |
| labial bar | A major connector located labial to the dental arch joining two or more bilateral parts of a mandibular removable partial denture. (05 Mar 2000) |
| labial commissure | Junction of upper and lower lip which occurs at corner of mouth. See: angle of mouth. (05 Mar 2000) |
| labial embrasure | A space existing on the facial aspect of the interproximal contact area between adjacent anterior teeth. (05 Mar 2000) |
| labial flange | The portion of the flange of a denture which occupies the labial vestibule of the mouth. (05 Mar 2000) |
| labial gingiva | That portion of the gingiva that covers the labial surfaces of the teeth and the alveolar process. (05 Mar 2000) |
| labial glands | Mucous glands in the submucous tissue of the lips. Synonym: glandulae labiales. (05 Mar 2000) |
| labial hernia | Hernia through the canal of Nuck. (05 Mar 2000) |
| labial occlusion | Malposition of a tooth in a labial direction, the occlusion as seen from the labial side of the arches. (05 Mar 2000) |
| labial part of orbicularis oris muscle | <anatomy> The major part of the orbicularis oris muscle within the body of the lips. Synonym: pars labialis musculi orbicularis oris. (05 Mar 2000) |
| labial sulcus | A furrow between the developing lip and gum. Synonym: labiodental sulcus, lip sulcus, primary labial groove. (05 Mar 2000) |
| labial surface | The surface of a tooth that faces the buccal or labial mucosa of vestibule of the mouth; opposite to the lingual surface of tooth. Synonym: facies vestibularis dentis, facies facialis dentis, buccal surface, facial surface of tooth, facies buccalis, facies labialis, labial surface. (05 Mar 2000) |
| labial tubercle | The slight projection on the free edge of the centre of the upper lip at the lower extent of the philtrum. Synonym: tuberculum labii superioris, procheilon, prochilon, tubercle of upper lip. (05 Mar 2000) |
| labial veins | See: anterior labial veins, posterior labial veins, inferior labial vein, superior labial vein. (05 Mar 2000) |