Triple Tray with Flexible Joint

U.S. Patent No: 6,913,461 B2

An apparatus and method to avoid dental impression material distortion comprised of dental impression triple tray with a flexible hinge rendered inflexible by a light-cured compound. The curing light is conveyed by an optical fiber assembly. Accurate simultaneous impressions of upper and lower impressions and bite registration, with the mouth completely closed and the jaw accurately positioned in centric closure are insured. Spring back of the impression tray frame caused by bite pressure against points on the frame are minimized by allowing the hinge element to initially flex when first placed in the mouth. While the impression polymer is curing, a light of the proper frequency range is delivered via the optical fiber to the light-cured compound in the hinge area to render the hinge inflexible.

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