Comparison of the means of qualitative (Likert scale) and quantitative (fourier coefficients) image evaluation of NOMAR, DEMAR, IMAR and IMAR+DEMAR at dental implants.

* Comparison of the means vs. NOMAR**Comparison of the means IMAR vs. DEMAR.*** Comparison of the means IMAR vs. IMAR+DEMARNOMAR = no metal artifact reduction, DEMAR = Dual-energy metal artifact reduction, IMAR = iterative metal artifact reduction, IMAR+DEMAR = combination of IMAR and DEMAR, p = p value, n.s. = non-significant.