A Comparative evaluation of fatigue behavior of removable partial denture alloys with and without heat treatment

Murali Ramamoorthi, Abdul Aziz Al Khuraif

Abstract


Aims: To compare the fatigue behavior of removable partial denture alloys with and without heat treatment. Material and Methods: A total of 35 specimens were casted and divided into 7 groups. The groups studied were low gold alloy, medium gold alloy, palladium alloy and cobalt chromium alloy group. One way deflection fatigue test was used to evaluate fatigue of alloys. The number of cycles required to fracture each specimen was recorded and subjected to statistical analysis. Results: More number of cycles required to fracture the heat treated noble alloys. The base metal alloy showed more fatigue resistance than low gold alloy but less than medium gold alloy and palladium alloy. Conclusion: Age hardening increases the fatigue resistance of noble alloys. Clinical Implications: The mechanical property of cast restorations can be modified by heat treatment of the alloys, and can improve the longevity of the restoration.


Keywords


Deflection Fatigue Test;Noble Alloys;Age Hardening;Heat Treatment

References


Bates J. Partial denture design: modern concepts. Design:[II] retention, safety and occlusal correction. Dental Update1986;13(7):322-8.

Vallittu PK, Kokkonen M. Deflection fatigue of cobalt-chromium, titanium, and gold alloy cast denture clasp. The Journal of Prosthetic Dentistry 1995; 74(4):412-9.

Bridgeport DA, Brantley WA, Herman PF. Cobalt Chromium and Nickel Chromium Alloys for Removable Prosthodontics, Part 1: Mechanical Properties. Journal of Prosthodontics 1993; 2(3):144-50.

Brudvik JS, Morris HF. Stress-relaxation testing. Part III: Influence of wire alloys, gauges, and lengths on clasp behavior. The Journal of Prosthetic Dentistry1981;46(4):374-9.

Ikebe K, Nokubi T, Kibi M, Ono T, Okuno Y. Influence of dimensional factors and heat treatment on permanent deformation of wrought wire clasps. The Journal of Osaka University Dental School1992;32:75-83.

Ghani F, Mahood M. A laboratory examination of the behaviour of cast cobalt-chromium clasps. Journal of Oral Rehabilitation1990;17(3):229-37.

VandenBrink JP, Wolfaardt JF, Faulkner MG. A comparison of various removable partial denture clasp materials and fabrication procedure for placing clasps on canine and premolar teeth. The Journal of Prosthetic Dentistry1993;70(2):180-8.

Yli-Urpo A, Lappalainen R, Huuskonen O. Frequency of damage to and need for repairs of removable dentures. Proceedings of the Finnish Dental Society Suomen Hammaslääkäriseuran toimituksia1985;81(3):151.

Morris H, Farah J, Craig R, Hood J. Stress distribution within circumferential clasp arms. Journal of Oral Rehabilitation1976;3(4):387-94.


Full Text: PDF

Refbacks

  • There are currently no refbacks.




Index Copernicus Index Copernicus Google Scholar NISCAIR OpenJGateDOAJUlrichsWeb
line
System Developed By Stanford University Arizona State University Simon Fraser University Canadian Centre For Studies In Publishing University of British Columbia - Faculty of Education
W3C XHTML v1.0 Verified W3C verified Valid CSS v2.1 PHP5 Enabled CopyScape Protected Made On Mac Apache Enabled MySQL Powered
Published by Celesta Software Pvt Ltd