Evaluation of artifacts in cone-beam computed tomography from different intraradicular pins and cementation materials...

To evaluate the generation of artifacts from intraradicular pins and cementation materials in cone-beam computed tomography images, using different exposure protocols.

Sixty extracted single-rooted premolars human were divided into six groups such as G1: Fiberglass pin with Allcem cement, G2: Metal core fiberglass pin core with Allcem cement, G3: metal core fiberglass pin with Allcem Core cement, G4: Fiberglass pin with Allcem Core cement, G5: Fiberglass pin with Panavia cement, and G6: metal core fiberglass pin with Panavia cement. CBCT images were acquired on the Orthophos XG^® 3D (Sirona Dental Systems, Bensheim, Germany) following the protocols with the exposure parameters; 1) high definition (HD) mode (70 kV and 6 mA, voxel size 100 µm, scan time 14s, 500 basis images), and 2) non-HD mode (70 kV and 10 mA, voxel size 160 µm, scan time 5s, 200 basis images). Two-way analysis of variance (ANOVA) and Tukey HSD post-hoc tests, Fisher's exact test and the McNemar test were performed to detect statistically significant factors.

For both HD and non-HD acquisition modes, the percentage of severe artifacts was higher in groups G3 and G6 (P<0.05). In the quantitative analysis, no significant differences were found among the parameters studied after accounting for all variables (P>0.05).

The type of fiberglass pin and cement used did not affect the production of the artifacts. When evaluating the scanning modes, the non-HD mode, which had lower mAs and fewer image bases, showed less artifact severity on the assessed CBCT scans.