SANDBLASTING SURFACE TREATMENT METHOD TO PREVENT SUBSURFACE DAMAGE OF THREE TYPES OF DENTAL ZIRCONIA AND INDUCE COMPRESSIVE STRESS THROUGH PHASE CHANGE
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United States of America Patent
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Issued Date -
Jun 1, 2023
app pub date -
Nov 29, 2022
filing date -
Nov 30, 2021
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Abstract
Provided is a surface treatment method for dental zirconia, which includes sandblasting the surfaces of three types of dental zirconia (3Y-TZP, 4Y-PSZ and 5Y-PSZ) with alumina particles, and when sandblasting conditions are optimized for each type of zirconia, the microstructure destruction of a subsurface layer may be minimized and compressive stress may be reinforced by a phase change, thereby improving mechanical properties, and the penetration of resin cement through microcracks inhibits crack propagation and thus is advantageous in increasing bonding efficiency of dental zirconia. In addition, a dental article including dental zirconia made by the surface treatment method for zirconia, and clinically suitable sandblasting protocols are provided.
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