Authors : Mahmoud Kazemi , Maryam Memarian and Venus Loran
Abstract: Different techniques have been used for achieving effective gingival retraction without damaging periodontal tissues, while they accompany with some disadvantages in practice. New techniques are required for achieving better management of gingival tissue in addition to be fast and simple. Comparing the effects of Expasyl paste and presaturated gingival cord with aluminum chloride on gingival retraction, recession and inflammation. Ten patients who needed gingival retraction prior to make impression were included in the study. At random, presaturated cord (with AlCl3) or expasyl paste were placed into each buccal-side gingival sulcus of paired posterior teeth. After removing the cord/paste, casts were made. All the casts were bucco-lingually sectioned at the buccal ridge by a rotary diamond disk and the widths of gingival sulcus were measured by a traveling microscope (Edmund optics Inc., barrington, NJ, USA) as the distance from the tooth to the gingival crest. The gingival recession was defined as the distance between the reference line marked on th e buccal side of the casted teeth and the gingival level, measured by a jig in 4 phases, 0, 7, 14 and 28 days. The gingival index was evaluated in the 4 phases, too. Data were analyzed using paired t-test or Wilcoxone rank test (α = 0.05).The mean width of the retracted sulcus in the presaturated cord group (0.46±0.34 mm) was greater than Expasyl paste group (0.34±0.36 mm, p<0.001). In all the 4 phases, the mean gingival recession in the cord group was significantly greater than Expasly paste group (p<0.001). The inflammation score was significantly higher in the cord group in compare to the paste group, in 7th day (p = 0.03) and 14th day (p = 0.04). Based on the findings, gingival retraction with Expasyl paste method caused less injury to gingival tissues than impregnated cord, while both provide gingival retraction.
Mahmoud Kazemi , Maryam Memarian and Venus Loran , 2009. Comparing the Effectiveness of Two Gingival Retraction Procedures on Gingival Recession and Tissue Displacement: Clinical Study. Research Journal of Biological Sciences, 4: 335-339.