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Porcelain veneering and subsequent shear bond strength testing procedures using Ultradent jig. (a) Zirconia specimen placed into the jig; (b) Liner application; (c) Liner applied to the zirconia surface; (d) Veneering porcelain on the liner; (e) Porcelain veneered on the surface; (f) Shear bond strength testing. In the no-liner subgroups, steps (b,c) were omitted.
