초록 ▼

Continuous fibers, resin-fiber pastes, or continuous fiber-reinforced preforms are inserted into tooth cavities to form high-strength dental restorations. The fibers may be mixed or coated with a resin monomer and may be used with fillers such as fluoride-releasing fillers and colorants. The resin-f

Continuous fibers, resin-fiber pastes, or continuous fiber-reinforced preforms are inserted into tooth cavities to form high-strength dental restorations. The fibers may be mixed or coated with a resin monomer and may be used with fillers such as fluoride-releasing fillers and colorants. The resin-fiber mixture may be hardened into preforms suitable for inserting into tooth cavities. Conventional filling materials such as composite resins and glass ionomers may be used to complete the restoration. Other applications include endodontic posts, retention pins, provisional restorations, and indirect restorations. Fiber reinforcement results in strength, toughness and elastic modulus (stiffness) several times greater than those of currently available direct-filling composite resins. The fiber performs are easily handled and placed into tooth cavities; the restorations are aesthetic and wear compatible, and release fluoride. The final restoration has significantly reduced polymerization shrinkage because the fiber preform can be pre-hardened and therefore will shrink little during hardening of the final restoration.

대표청구항 ▼

1. A method for preparing a continuous fiber-reinforced restoration for direct filling a tooth cavity in a tooth having an occlusal surface, the method comprising:inserting into a prepared tooth cavity a fiber material selected from the group consisting of a hardened fiber composite preform, fibers,

1. A method for preparing a continuous fiber-reinforced restoration for direct filling a tooth cavity in a tooth having an occlusal surface, the method comprising:inserting into a prepared tooth cavity a fiber material selected from the group consisting of a hardened fiber composite preform, fibers, an unhardened fiber-resin paste, and a partially-hardened flexible fiber composite preform; wherein fibers in the fiber material extend continuously across at least 60% of the widest dimension of the tooth cavity, and wherein the fibers are oriented in a direction generally parallel to the occlusal surface of the tooth; filling the tooth cavity with a direct-filling material; and hardening the direct-filling material to form the continuous fiber-reinforced restoration.