公开(公告)号：EP1200037A1

公开(公告)日：2002-05-02

申请号：EP00948955.0

申请日：2000-07-26

Applicant: Dentsply International, Inc.

Inventor： LICHKUS, Andrew, M. ,  SCHIFFER, William, James, Jr. ,  NALBONE, Craig, L. ,  DECAVALCANTE, Michael, L.

IPC: A61K6/087 ,  A61C13/267

CPC classification number: A61C13/267 ,  A61C13/082 ,  A61C13/20 ,  A61C13/206

Abstract: The invention provides a dental device comprising thermoplastic polyamide having a Charpy notched impact strength of at least 3.5 ft-lb/in2. Preferably the polyamide comprises at least 10 percent by weight of micro-crystals having a largest dimension less than 750 nanometers. Preferably the device is a Denture base, denture, partial denture, clasp, splint, or night guard. Preferably the polyamide has an opacity of less than 30 percent. The invention provides a metal cartridge container containing particles of thermoplastic polyamide effectively free of pigment. The metal cartridge is used in a method of making a partial dental prosthesis having a substantially transparent clasp. First a substantially transparent thermoplastic is injected into a first portion of a mold cavity of a mold containing an artificial tooth, and then a substantially opaque thermoplastic injecting into a second portion of the mold cavity. The removable partial dental prosthesis formed includes an artificial tooth supported by a base integrally connected to a clasp, wherein the base includes pigment and is substantially opaque, and the clasp is substantially transparent and effectively without pigment.

公开(公告)号：EP1200037B1

公开(公告)日：2005-11-23

申请号：EP00948955.0

申请日：2000-07-26

Applicant: DENTSPLY INTERNATIONAL, INC.

Inventor： LICHKUS, Andrew, M. ,  SCHIFFER, William, James, Jr. ,  NALBONE, Craig, L. ,  DECAVALCANTE, Michael, L.

IPC: A61K6/087 ,  A61C13/267

CPC classification number: A61C13/267 ,  A61C13/082 ,  A61C13/20 ,  A61C13/206

Abstract: The invention provides a dental device comprising thermoplastic polyamide having a Charpy notched impact strength of at least 3.5 ft-lb/in2. Preferably the polyamide comprises at least 10 percent by weight of micro-crystals having a largest dimension less than 750 nanometers. Preferably the device is a Denture base, denture, partial denture, clasp, splint, or night guard. Preferably the polyamide has an opacity of less than 30 percent. The invention provides a metal cartridge container containing particles of thermoplastic polyamide effectively free of pigment. The metal cartridge is used in a method of making a partial dental prosthesis having a substantially transparent clasp. First a substantially transparent thermoplastic is injected into a first portion of a mold cavity of a mold containing an artificial tooth, and then a substantially opaque thermoplastic injecting into a second portion of the mold cavity. The removable partial dental prosthesis formed includes an artificial tooth supported by a base integrally connected to a clasp, wherein the base includes pigment and is substantially opaque, and the clasp is substantially transparent and effectively without pigment.