US 5,348,475 AGranted

Trimodal method of curing dental restorative compositions

AssigneeJeneric/Pentron Incorporated

InventorsSamuel Waknine, Arun Prasad, Weitao Jia

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Abstract

A trimodal method of curing dental composite restorative materials involves the use of visible light illumination for the initial curing of the composite resin and a combination of dry heat and vacuum for the complete cure of the composite restorative materials. More specifically, the method for preparing dental restorative materials includes the steps of forming a dental restoration from a composite resin of a type conventionally employed in the dental profession, in which the composite resin includes a photosensitizing system for initiating polymerization of the composite resin upon exposure to visible light, an initiator for initiating polymerization upon application of heat and at least one filler; exposing the thus prepared restoration to a source of visible light to at least partially cure said composite resin and then subjecting the thus prepared restoration to a combination of heat and vacuum to complete polymerization of said complete resin.

Claims7

Dependent claims

A method for preparing a composite dental restoration exhibiting improved toughness and fracture resistance comprising the steps of:

(A) forming a dental restoration from at least one layer of a composite resin, said composite resin comprising
(i) at least one binder resin,
(ii) a diluent monomer,
(iii) a photopolymerization system comprising an initiator for initiating polymerization of the composite resin upon exposure to visible light and an accelerator,
(iv) an initiator for initiating polymerization of the composite resin upon application of heat, and
(v) at least one filler, wherein each layer of the composite resin is exposed to a source of visible light to partially cure each layer of said composite resin to provide sufficient hardening to enable building up of additional layers of composite resin thereon;
(b) subjecting the thus prepared restoration to a combination of dry heat and vacuum sufficient to remove residual monomeric surface layers and anaerobically complete polymerization of said composite resin.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/051,444Filed 22 Apr 1993 · continuation
Priority: 8 May 1991
Granted: 20 Sep 1994
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

A61C 5/30
Filling or capping teeth: securing inlays, onlays or crowns
A61C 5/70
Filling or capping teeth: tooth crowns; Making thereof
A61K 6/884
Preparations for artificial teeth, for filling teeth or for capping teeth: comprising natural or synthetic resins
A61C
Dentistry

Family

Serial697,063Parent of this continuation · filed 8 May 1991
US 5,348,475 AThis patent

From the US filing history. Foreign family members aren’t listed.

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