D scanner uses in dentistry and how to use 3D scanner to measure tooth movements before and after orthognathic surgery

start with an introduction about 3Dscanner,and how does it work briefly. and its uses in general dentistry.
the uses of 3D images to measure tooth movement in orthodontic patients and show recent articles that show that.
accuracy in using 3Dimage in measuring tooth movement and its reliability.
Kindly i want the writer to be from USA, it makes a big difference regarding this topic.