Effect of Marginal Designs on Fracture Strength of High Translucency Monolithic Zirconia Crowns

Figure 1

Stainless-steel dies were machined in cylindrical shape with chamfer margin (a) and possessed an axial surface height of 5.5 mm with 6-degree taper and round occlusal and cervical line angles of 6.0 mm and 7.0 mm in diameter, respectively (b). Zirconia crowns were fabricated on dies according to the thickness of chamfer margin, and either absence (c) or presence of collar (d), according to their respective dimensions.

(a)

(b)

(c)

(d)