Research Article

Effectiveness of Nanohydroxyapatite on Demineralization of Enamel and Cementum Surrounding Margin of Yttria-Stabilized Zirconia Polycrystalline Ceramic Restoration

Figure 1

Human third molar (a) was sectioned at 1 mm below and above cementoenamel junction (CEJ) (b). The crown-CEJ-root (CCR) portion was removed and replaced with the yttria-stabilized tetragonal zirconia polycrystalline (Y-TZP) disk by bonding to the crown (C) and root (R) portion using resin cement (c) and then inserted in acrylic block (d) to create a flat surface area of 4 × 4 mm2 (e).