A laser scanner and machine vision system for dental plaster model inspection

In this paper, we proposes a machine vision system to approximate depth of drilled dental plaster model in training process of young dentist and undergraduate dentist. The system is based on basic laser scanner and machine vision technique. The proposed system consists of two main parts: an image acquisition process using basic line laser scanner and depth measurement system based on a right and isosceles triangle. 450 laser points on each dental plaster model sample are extracted for testing. From our experimental result, our system is more effectiveness to inspect the practiced dental plaster model than manual inspection by a senior dentist. Our efficiency proposed system is 0.1 mm error in depth on measurement range 0.2 to 1.2 mm depth.