Dental and orthodontic articles of reactive metals

• US 6,390,813 B1
• Filed: 08/13/2001
• Issued: 05/21/2002
• Est. Priority Date: 05/30/1995
• Status: Expired due to Term

• Current Assignee: Ormco Corporation (Envista Holdings Corporation)
• Original Assignee: Ormco Corporation (Envista Holdings Corporation)
• Inventors: Sachdeva, Rohit Chaman Lal, Farzin-Nia, Farrokh
• Primary Examiner(s): Lewis, Ralph A.
• Application Number:
  US09/928,564
• Publication Number:
  US 20020045147A1
• Time in Patent Office: 281 Days
• Field of Search: 433/2, 433/20, 433/215, 420/421, 420/422
• US Class Current: 433/20
• CPC Class Codes: C22C 14/00 Alloys based on titanium
• CPC Class Codes: C22C 16/00 Alloys based on zirconium

Abstract

Dental and orthodontic articles comprising alloys of a material selected from the group consisting of Ti, Zr, Si, Mo, Co, Nb and Be. The alloys may further include at least one secondary alloying element selected from the group consisting of Ta, Cr, Al, V, Pd, Hf and Fe. The alloys preferably comprise a primary constituent in the range of about 30-85% by weight of the alloy, a secondary alloying component in the range of about 0.5-10% by weight, and the alloy has a modulus of elasticity in the range of about 5 million to 15 million psi.

Claims

1. A dental or orthodontic article comprising an alloy having as a primary constituent at least one element selected from the group consisting of Ti, Zr, Si, Mo, Co, Nb, and Be, and at least one secondary alloying element selected from the group consisting of Ta, Cr, Al, V, Pd, Hf, and Fe, said alloy having a maximum average grain size of about 100 microns, and said alloy being substantially free of Ni, said article selected from the group consisting of orthodontic archwires, springs, brackets and endodontic files and reamers.

2. A dental or orthodontic article according to claim 1 wherein said primary constituents are Ti and Mo and said secondary alloying element is Hf.

3. A dental or orthodontic article according to claim 1 wherein said primary constituent is Ti.

4. A dental or orthodontic article according to claim 1 wherein said primary constituent is Zr.

5. A dental or orthodontic article according to claim 1 wherein said primary constituents are Ti and Zr.

6. A dental or orthodontic article according to claim 1 wherein said alloy is biocompatible.

7. A dental or orthodontic article according to claim 1 wherein said alloy exhibits at least partial superelastic and shape memory characteristics.

8. A dental or orthodontic article according to claim 1 wherein said secondary alloying element is present in the range of about 0.5-10% by weight of said alloy.

9. A dental or orthodontic article according to claim 8 wherein said secondary alloying element is present in the range of about 1.0-10% by weight of said alloy.

10. A dental or orthodontic article comprising an alloy having as primary constituents Ti, Mo and at least one element selected from the group consisting of Zr, Si, Co, Nb, and Be, said alloy having a maximum average grain size of about 100 microns, and said alloy being substantially free of Ni, said article selected from the group consisting of orthodontic archwires, springs, brackets and endodontic files and reamers.

11. A dental or orthodontic article according to claim 10 wherein said alloy has a modulus of elasticity in the range of about 5 million to 15 million psi.

12. A dental or orthodontic article according to claim 10 wherein said primary constituents are Ti, Mo and Zr.

13. A dental or orthodontic article according to claim 10 wherein said alloy is biocompatible.

14. A dental or orthodontic article according to claim 10 wherein said alloy exhibits at least partial superelastic and shape memory characteristics.

15. A dental or orthodontic article according to claim 10 wherein said primary constituents are Ti, Mo and Nb.