Accuracy and reproducibility of permanent dentitions and dental arch measurements: comparing three different digital models with a plaster study cast.

Aim: The objective of the present study was to assess the accuracy and reproducibility of permanent dentition and dental arch measurements of three digital scanners compared with the gold standard, a physical plaster cast.

Materials And Methods: In this cross-sectional study, the following records of 30 patients were used: 1) orthodontic physical plaster study cast (PPSC); 2) digitally scanned physical model (DSPM), 3) direct intraoral model scanned with a Trios color scanner; and 4) direct 3D CBCT digital model. The following 3D measurements were obtained: mesiodistal tooth dimensions; total tooth materials; dental arch perimeters; total arch lengths; and intermolar, interpremolar, and intercanine widths.

A Rare Case Series: Impacted Distomolars.

Background: The occurrence of multiple supernumerary teeth in individuals without any associated syndrome is rare. Supernumerary teeth may occur in any region of the dental arch and are frequently observed in the maxillary region. But the occurrence of distomolars is rare, particularly mandibular distomolars are extremely rare.