Reinforced gingival retraction cord

Details Reinforced gingival retraction cord Reinforced gingival retraction cord

2007-01-30

2007-01-30

Wilson, John J (Department: 3732)

Dentistry

Apparatus

Having absorption means or means to isolate tooth or mouth...

Reexamination Certificate

active

11064725

ABSTRACT:
Gingival retraction cords are constructed from two or more strands that are interlocked to form a knitted, braided, woven, or twisted retraction cord. At least one strand is made from an absorbent material and another strand is made from a degradation-resistant material, such as nylon, polyester, fiberglass, or metal. The absorbent strands are impregnated with an active agent. The degradation-resistant strands resist degradation by the active agent. Alternatively, one or more strands are used to make the knit, weave, or braid and each strand is made from two or more different fibers. For example, one or more absorbent fibers and one or more synthetic fibers can be twisted to make a blended strand. The blended strands can be used to knit, braid, or weave a retraction cord. Because the degradation-resistant strands are part of the strand pattern, the retraction cords can be made sturdier without adversely affecting the cord's inherent deformation properties.

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Fazekas, A., “Effects of Pre-Soaked Retraction Cords on the Microcirculation of the Human Gingival Margin” Oper Dent 27(4): 343-8 2002.
Nieto-Martinez, D., “Effects of Diameter, Chemical Impregnation and Hydration on the Tensile Strength of Gingival Retraction Cords” J. Oral Rehibil, 28(12): 1094-100 2002.
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