The accuracy and reliability in tooth shade selection using different instrumental techniques : a vitro study
This study aimed to evaluate the accuracy and reliability of tooth shade selection in the model using 30 milled crowns via five methods: 1). Digital single–lens reflex (DSLR) camera with twin flash (TF) and polarized filter (DSLR+TF), 2). DSLR camera with a ring flash (RF) and polarized filter (DSLR+RF), 3). Smart-phon...