Dentistry – Method or material for testing – treating – restoring – or... – Crown
Patent
1999-08-09
2000-08-22
Manahan, Todd E.
Dentistry
Method or material for testing, treating, restoring, or...
Crown
433218, A61C 508
Patent
active
061062952
ABSTRACT:
An esthetic preformed crown for children which uses layers of a custom crown material applied as a veneer over non-precious, semiprecious and precious casting metals fabricated for the casting of custom copings and as an alternative to porcelain, vitrioids, copolyester, epoxy, and acrylics. The veneer is comprised of high density polyethylene, which is thermoformed over a screened preformed stainless steel crown to obtain the desired appearance. The crown material is specifically comprised of pigmented high-density polyethylene because of its high elastic limit great flexural strength, ability to withstand great shearing force when mechanically bonded to a preformed crown. The crown of the present invention has natural appearance of a vital tooth. The high density polyethylene veneer in this esthetic preformed crown has a greater bond strength than any current state of the art veneer or other facing material currently used on children's esthetic stainless steel crowns.
REFERENCES:
patent: 4433959 (1984-02-01), Faunce
patent: 4722689 (1988-02-01), Corbett
patent: 5308243 (1994-05-01), Emmons
patent: 5538429 (1996-07-01), Mayclin
patent: 5624261 (1997-04-01), Wiedenfeld
Green et al, "Chairside Aesthetic Option for Anterior Stainless SteelCrowns", American Academy of Pediatric Dentistry, 1998, San Diego, California.
Tofuki et al, "Effect of Surface Preparation on the Bond Strength of Thermoset Resins to Stainless Steel," Journal of Pedodontics, Vol 9:77 (1984) p. 77-83.
Undated Brochure: "White Steel Crowns" (2 pages).
Undated Brochure: "The New Generation of Pedo Stainless Steel Crowns" (1 page).
1991 Brochure: "Welcome to the Wonderful World of Kinder Crowns" (1 pahge).
1993 Brochure: "The Whiter Biter Crown II" (1 page).
Undated Brochure: "Java Crown" (1 page).
Undated Brochure: "Nu Smile Primary Crowns" (1 page).
GSF Trust
Manahan Todd #E.
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