International Journal of Computerized Dentistry, Pre-Print
Moslemian, Naeime / Koulivand, Soudabeh / Zeighami, Somayeh / Nankali, Ali / Alikhasi, Marzieh
Seite 1 – 24
Aim: This study is aimed to evaluate the effect of milling mode and margin defining method on marginal and internal adaptation of digitally designed and fabricated ceramic veneers.
Materials and Methods: Forty extracted central incisors were prepared for ceramic veneers. Veneers were categorized into 4 groups (#10) based on designing (automatic or manual defining of cervical and incisal margins) and milling mode (fine or extra-fine). Veneers were cemented to teeth using resin cement and then polished. After cementation, the teeth were embedded in clear polyester resin. Then the teeth cut into three section, absolute marginal gap at the cervical margins (AMGC), marginal gap at incisal (MGI) and cervical margins (MGC), and internal gap (IG) at axial wall were evaluated using a scanning electron microscope. Two-way ANOVA and t-tests were used (α=.05).
Result: Margin defining method affected adaptation of internal and incisal margin; automatic software margin defining resulted in less IMG (P=.038) and IG (P=.009) than manual.
Conclusion: Selection of milling mode didn’t affect marginal gap. Margin defining method affected marginal gap at incisal margin and internal gaps.