Crown inclination measured by laser scanner

We developed the computer measurement procedure to measure crown inclination of three-dimensional (3D) dental images scanned by laser scanner to reduce human error.20 study models with normal occlusion were scanned by laser scanner. Crown inclinations of each tooth of scanned 3D dental images were measured according to Andrews’ method. Results: The mean value measured by our method and that measured by manual procedure in the same sample did not detect significant differences. In the variances of the measurements, the results of measurement by our method were larger than that by manual procedure for almost all teeth.Compared to other data, the results of our procedure tended to show large variances than that of other report with manual method. On the other hand, compared to non-manual procedure, the data and that of variances tended similar.Our procedure could objectively measure inclinations with less prejudice and or human error of examiner. This procedure would be useful in research and in the clinic.