REINFORCED GINGIVAL RETRACTION CORD

摘要

Gingival retraction cords (34) are constructed from two or more strands (36, 38, 40, 42) that are interlocked to form a knitted, braided, woven, or twisted retraction cord. At least one or more strands (36, 38, 40) are made from an absorbent material and another strand (42) is made from a degradation-resistant material, such as nylon, polyester, fiberglass, or metal. The absorbent strands (36, 38, 40) are impregnated with an active agent. The degradation-resistant strand (42) resists degradation by the active agent. Because the degradation-resistant strand (42) is part of the cord's pattern, the retraction cord (34) can be made sturdier without adversely affecting the cord's inherent deformation properties.