Comparative study on the fit of Maxillary Complete Denture Bases at the Posterior Palatal Border Made by Heat Cure Acrylic Resin Processed on High Expansion Stone and Type III Dental Stone

Sunil Arora, Rajashekar Sangur, Dayakra H.R.

Abstract


Background: The advent of acrylic resins in 1937 was a major breakthrough in the annals of modern dentistry. Their recognition and acceptance in prosthodontics was indeed incredible as they were found to be more aesthetic, easy to manipulate both in the clinic as well as in the laboratory. Aims: To determine the effect of high expansion stone (type V) in compensating the acrylic resin shrinkage compared to type III dental stone. Materials and Methods: A total of 30 edentulous maxillary casts were made from this master mold, out of which 15 were made with type-V high expansion dental stone and another 15 were made from type-III dental stone. These 30 edentulous casts were used for processing the maxillary denture bases. Each acrylized denture base was recovered, trimmed, polished and numbered before its adaptation on the master cast for reading. Results: Analysis of the data revealed that the maxillary denture bases processed on high expansion dental stone casts produced openings along the posterior palatal border that were substantially 39% smaller compared with the denture bases processed on type-III dental stone. Conclusion: The use of high expansion dental stone can be recommended to compensate for the acrylic shrinkage.


Keywords


Type III Dental Stone;Maxillary Denture Base;Type V Expansion Stone

References


Anthony D, Peyton F. Dimensional accuracy of various denture-base materials. The Journal of Prosthetic Dentistry1962;12(1):67-81.

Sykora O, Sutow EJ. Improved fit of maxillary complete dentures processed on high expansion stone casts. The Journal of Prosthetic Dentistry 1997; 77(2):205-8.

Chen J, Lacefield W, Castleberry D. Effect of denture thickness and curing cycle on the dimensional stability of acrylic resin denture bases. Dental Materials1988;4(1):20-4.

Skinner E, Cooper E. Physical properties of denture resins: Part I. Curing shrinkage and water sorption. J Am Dent Assoc1943;30(6):1845-52.

Peyton F. History of resins in dentistry. Dental clinics of North America1975;19(2):211-22.

Johnson D, Duncanson Jr M. The plastic postpalatal denture seal. Quintessence International 1987; 18 (7): 457-62.

Sykora O, Sutow E. Posterior palatal seal adaptation: influence of a high expansion stone. Journal of Oral Rehabilitation1996;23(5):342-5.


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