Comparative analysis of tensile strength between three types of retraction cords

Introduction : Gingival retraction is the withdrawal of marginal gingiva away from tooth. This procedure creates a space between prepared tooth and gingival tissues to catch more fine details impression material. The most common device used in clinical practice cord. Aim study aims evaluate tensile strength cords designed with different braiding technology. Materials methods A total 150 experimental units were studied. They divided into 3 groups 50 each according type cord (Ultrapak #00, braided without core, monofilament core). We tested LMT 100 micro-tensile apparatus. data analyzed using SPSS v. 21. critical significance level p <0.05 used. Results comparative analysis shows statistically significant difference knitted threads #00) ( <0.001). results indicated highest 41.95 N/mm 2 , followed closely by same cotton braid average 39.80 last came Ultrapak 22.11 . Conclusions show higher compared #00 cord, which made knitting