Abstract
Background and aims. At present, cone beam computed tomography (CBCT) has become a substitute for computed
tomography (CT) in dental procedures. The metallic materials used in dentistry can produce artifacts due to the beam hardening
phenomenon. These artifacts decrease the quality of images. In the present study, the number of artifacts as a result of
beam hardening in the images of dental implants was compared between two NewTom VG and Planmeca Promax 3D Max
CBCT machines.
Materials and methods. An implant drilling model was used in the present study. The implants (Dentis) were placed in
the canine, premolar and molar areas. Scanning procedures were carried out by two CBCT machines. The corresponding
sections (coronal and axial) of the implants were evaluated by two radiologists. The number of artifacts in each image was
determined using the scale provided. Mann-Whitney U test was used for two-by-two comparisons at a significance level of
P<0.05.
Results. There were statistically significant differences in beam hardening artifacts in axial and coronal sections between
the two x-ray machines (P<0.001), with a higher quality in the images produced by the NewTom VG.
Conclusion. Given the higher quality of the images produced by the NewTom VG x-ray machine, it is recommended for
imaging of patients with extensive restorations, multiple prostheses or previous implant treatments.