Abstract
Chrome cobalt alloy orthodontic wire may be heat treated to increase spring performance and efficiency. This study was designed to quantify the effects that several heat treatment temperatures have upon the ability of .016" x .022" type 1 chrome cobalt wire to resist permanent deformation. In addition, the changes in resistance to permanent deformation due to heat treatment at 900° F were studied in .018" stainless steel wire and chrome cobalt wire of all four tempers.
When compared to untreated wire, .016" x .022" type 1 chrome cobalt wire exhibited a maximum increase of approximately 174 percent in resistance to permanent deformation due to heat treatment in a dental oven for 5 minutes at 1200° F. An increased resistance to permanent deformation of 95 percent was seen following heat treatment at 900° F.
.016" x .022" type 1 chrome cobalt wires heat treated with an electrical resistance unit using 950° F temper indicating paste exhibited increases in resistance to per permanent deformation similar to wires heat treated in the dental oven at 800° and 900° F.
When compared to untreated wires, .018" diameter stainless steel wire and type 1, type 2, type 3, and type 4 chrome cobalt wire heat treated at 900° F showed respective increases of 139 percent, 138 percent, 164 percent, 133 percent, and 167 percent in resistance to permanent deformation.
LLU Discipline
Orthodontics
Department
Dentistry
School
Graduate School
First Advisor
Jack L. Tomlinson
Second Advisor
Alden B. Chase
Third Advisor
Richard A. Simms
Fourth Advisor
Roland D. Walters
Fifth Advisor
Clelan G. Ehrler
Degree Name
Master of Science (MS)
Degree Level
M.S.
Year Degree Awarded
1974
Date (Title Page)
6-1974
Language
English
Library of Congress/MESH Subject Headings
Dental Materials
Type
Thesis
Page Count
vii; 42
Digital Format
Digital Publisher
Loma Linda University Libraries
Copyright
Author
Usage Rights
This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights.
Recommended Citation
Fillmore, Galen M., "Heat Treatment of Chrome Cobalt Alloy Orthodontic Wire" (1974). Loma Linda University Electronic Theses, Dissertations & Projects. 2256.
https://scholarsrepository.llu.edu/etd/2256
Collection
Loma Linda University Electronic Theses and Dissertations
Collection Website
http://scholarsrepository.llu.edu/etd/
Repository
Loma Linda University. Del E. Webb Memorial Library. University Archives