Comparison of X-ray absorption for various dental materials using cone-beam CT

抄録

Purpose : To evaluate multiple dental materials and identify those that could be optimally used for a new digital impression method for the mucosa of the edentulous maxillary and mandibular ridges using cone-beam CT (CBCT).

Materials and Methods : This study evaluated the following dental materials, fitting test materials (5 materials), impression materials (2 materials), and tissue conditioning materials (2 materials). A contrast phantom and a dental CBCT unit were used for the experimental evaluations. The nine dental materials and five reference substances were CBCT-photographed, and the pixel values in the regions of interest were calculated from the obtained image data using general-purpose software. Subsequently, the X-ray absorption rates of these materials were converted to pseudo-CT values.

Results : Fit Checker^TM and Fine Checker^® and EXADENTURE^® showed higher pseudo- CT values than the other materials, with no significant differences between them in single slice. Fit Checker^TM, Fine Checker^®, and EXADENTURE^® showed higher pseudo- CT values than the other materials, especially Fit Checker^TM in multi-slice.

Conclusions : Fit Checker^TM, Fine Checker^®, and EXADENTURE^® showed higher pseudo-CT values than other dental materials, suggesting a high possibility of three-dimensional construction of the edentulous ridge mucosa.