2007 ICD-9-CM Procedure 24.91 Extension or deepening of buccolabial or lingual sulcus Those procedures designed to widen the zone of attached gingiva and deepen the vestibular depth which will facilitate the clearance of the area for natural food passage, and provide access for toothbrushing and interdental stimulation. 24.91 is a specific code that can be used to specify a procedure 24.91 contains 11 index entries View the full Volume 3 24.* hierarchy Index entries containing 24.91: Caldwell operation (sulcus extension) 24.91 Deepening buccolabial sulcus 24.91 lingual sulcus 24.91 Extension buccolabial sulcus 24.91 lingual sulcus 24.91 Kazanjiian operation (buccal vestibular sulcus extension) 24.91 Operation Caldwell (sulcus extension) 24.91 Kazanjiian (buccal vestibular sulcus extension) 24.91 Trauner (lingual sulcus extension) 24.91 Trauner operation (lingual sulcus extension) 24.91 Vestibuloplasty (buccolabial) (lingual) 24.91