The effects of different implant crown restorative materials on the detection of proximal caries of adjacent teeth in cone-beam computed tomography (CBCT) scans using various machines, metal artifact-reduction (MAR) algorithm, and exposure protocols.

Standard+MAR came in 2nd with a statistically significant positive association (K 1.000, p 0.046) by Observer 3, Emax using the Standard setting produced statistically significant positive association (K 1.000, p 0.083) by Observer 3, the 3Y using the Standard settings was the 2nd lowest of all settings with a barely not statistically significant results with a negative association (K -0.800, p 0.083) by observer 3, and finally 5Y using the Standard setting was the lowest of all with a statistically significant negative association (K -0.471, p 0.025; K -0.800, p 0.083; K -1.000, p 0.157 respectively) by Observers 1, 2 and 3 (Tables 4-7, Fig. 1).

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The inter-observer agreement was insignificant, while intra-observer agreement was highly significant.

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