Accession Number:

ADA230875

Title:

The Effect of Surface Treatment on the Knoop Hardness of DICOR

Descriptive Note:

Interim rept. Sep 1987-Mar 1988

Corporate Author:

SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TX

Personal Author(s):

• Naylor, W. P.
• Munoz, Carlos A.
• Goodacre, Charles J.
• Swartz, Marjorie L.
• Moore, B. K.

Report Date:

1990-01-01

Pagination or Media Count:

14.0

Abstract:

One reported advantage of DICOR is a hardness comparable to human enamel. However, DICOR restorations are subjected to different surface treatments as a result of processing, esthetics, and functional requirements. This study compared the Knoop hardness of DICOR specimens under three conditions Treatment I cerammed Treatment II cerammed and shaded and Treatment III sectioned to reveal internal DICOR material. Knoop hardness differences among groups were statistically significant P 0.05. The cerammed surface was the hardest state of DICOR and harder than human enamel. Shaded DICOR had a surface hardness comparable to dental porcelain. The internal glass- ceramic material, located beneath the shaded porcelain and cerammed skin, had a Knoop hardness similar to human enamel. Article will be published in the International Journal of Prosthodontics, Mar-Apr 1991.

Descriptors:

• *HARDNESS
• REQUIREMENTS
• HUMANS
• MATERIALS
• PROCESSING
• SURFACE FINISHING
• ENAMELS
• GLASS
• SURFACES
• CERAMIC MATERIALS
• INTERNAL
• DENTISTRY
• FUNCTIONS
• CERAMIC COATINGS

Subject Categories:

• Anatomy and Physiology
• Medicine and Medical Research
• Ceramics, Refractories and Glass

Distribution Statement:

APPROVED FOR PUBLIC RELEASE