The Effect of Sintering Program on the Compressive Strength of Zirconia Copings.

Statement Of The Problem: Considering the limitations of conventional sintering of zirconium oxide (ZrO) copings, shortening the sintering time can be proposed as an alternative method for making the copings.

Purpose: This study aimed to assess the effects of sintering time on compressive strength of Yttria Tetragonal Zirconia Polycrystal (Y-TZP) copings.

Materials And Method: Thirty copings of pre-sintered 3Y-TZP blanks were milled and sintered in a special furnace for three different durations (n=10 per group).