Lower Alveolar Carcinoma Segmental V Marginal Resection Wald, R. M. and Calcaterra, T. C. Arch Otolaryngol 109: 578, September, 1983 A comparison between segmentai (full thickness) and marginal (partial thickness) resection after 2 years survival rate with no evidence of disease was made in 53 patients with lower alveolar ridge squamous cell carcinoma. Comparison for these two techniques was done for each stage of the disease. The comparison of the results indicate that marginal resection especially when combined with radiation, is as effective as segmental in Stages I, II and possibly in stage III. However, Stage IV carcinoma must be treated by a combined segmental resection. It was discussed that although more experience and research must be done in this field, the results disclosed that marginal resection was shown to be effective in the first two stages of the disease, and may be performed as the initial form of therapy in selected cases. Failure rates for both marginal and segmental were similar, 33% and 30%. Division ofHead and Neck Surgery, Department ofSurgery, UCLA School ofMedicine, Los Angeles, California 90024. Dr. Andreas Parashis Recession in Sites with Inadequate Width of the Keratinized Gingiva An Experimental Study in the Dog Ericsson, I. and Lindhe, J. J Clin Periodontol 11: 95, February, 1984 To compare the effect of a mucogingival restoration in gingival units with a wide or a narrow zone of keratinized tissue, periodontal inflammation was induced in three beagle dogs, with ligatures placed around the necks of the mandibular premolars. After 8 months, an apically positioned flap was done on the right side which left a zone of attached gingiva, while on the left side a gingivectomy eliminating all the keratinized tissue, was done to induce periodontal health. Plaque control after surgery included topical applications of 0.2% Chlorhexidine digluconate for 2 weeks followed by mechanical brushing. At baseline Day 0, a notch was prepared at the level of the gingival margin on the buccal root surface of the teeth. A steel band was cemented, at this time, around these teeth with a reduced, but healthy periodontium. At Day 180, a biopsy of the buccolingual sections of each root was analyzed after the animals were killed. Large amounts of deposits were found in all experimental sites. In 8 out of 12 sites of the gingivectomy group, the gingival margin shifted apically, but none of the flap group had shifted. The subgingival steel band, used as a marginal overhang, encouraged plaque accumulation leading to gingivitis. The results suggested that a restoration placed subgingivally in an area with a lack of or a narrow zone of attached gingiva can lead to the apical displacement of the margin. Department ofPeriodontology, Faculty of Odontology, University oj Gothenburg, Box 33070. S. 40033, Gothenburg, Sweden. Dr. Jean Pierre Altounian Utilization of the Pedicle of the Temporal-ForeheadFlap to Close Defects in the Maxilla after Tumor