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US 10,327,871 B2Granted
Reinforced gingival retraction cord
AssigneeKing Abdulaziz University
InventorsFahad Ibrahim Fatiny, Mohammed A. Wahbi, Turki Y. Alhazzazi, Yaser M. Alkhiary
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Abstract
A dental retraction elongated member, for example, a retraction cord, for placement between a tooth and its adjacent gum tissue during dental impression taking and restorative procedures includes a core coated with a thermoplastic material so that the retraction cord is resistant to shredding, tearing, and sticking to dental restorative and impression taking materials.
Claims20
A flexible dental retraction elongated member comprising:
- a core consisting essentially of a single strand of stainless steel wire or braided, weaved, or twisted stainless steel wires;
- and
- an exterior thermoplastic coating comprising polytetrafluoroethylene (PTFE) or expanded polytetrafluoroethylene (e-PTFE) that does not swell when contacted with moisture,
- wherein the coating covers the core and is irreversibly attached to the core with an adhesive,
- wherein a diameter of the dental retraction elongated member ranges from 0.5 to 3.0 mm,
- wherein a ratio of the diameter of the dental retraction elongated member to a diameter of the core is from 7:6 to 10:1;
- wherein the dental retraction elongated member has a Young's modulus ranging from 1 to 100 GPa, is bendable and remains bent after being bent, and is configured to be placed between a tooth and adjacent gum tissue.
4 more elements
A flexible dental retraction elongated member comprising:
- a core consisting essentially of a single strand of stainless steel wire;
- braided, weaved or twisted stainless steel wires;
- or braided, weaved or twisted Stainless steel wires and polymer strands;
- an exterior thermoplastic coating comprising polytetrafluoroethylene (PTFE) or expanded polytetrafluoroethylene (e-PTFE) that ranges in thickness from 0.25 to 1.5 mm;
- wherein the coating covers the core and is irreversibly attached to the core with an adhesive;
- wherein a diameter of the dental retraction elongated member ranges from 0.5 to 3.0 mm,
- wherein a ratio of the diameter of the dental retraction elongated member to a diameter of the core is from 2:1 to 4:1;
- wherein the member has a Young's modulus ranging from 5 to 20 GPa, is bendable and remains bent after being bent, and is configured to be placed between a tooth and adjacent gum tissue.
5 more elements
Dependencies are inferred from the claim text.