Performance differences in the detection of subgingival calculus by laser fluorescence devices.This study compared the performance of three laser fluorescence (LF) devices (DIAGNOdent Classic, DIAGNOdent Pen and KEY3 laser) under standardized laboratory conditions for detecting subgingival deposits of calculus on root surfaces of extracted teeth in typodonts.  The KEY3 showed greater accuracy (86.4 %) than the DIAGNOdent Pen (84 %) and DIAGNOdent Classic (80.2 %).  The intra-examiner reproducibility was also higher for the KEY3 (mean Cohen kappa 0.74) than the DIAGNOdent Pen (0.66) and DIAGNOdent Classic (0.6). 
DIAGNOdent Classic
Performance differences in the detection of subgingival calculus by laser fluorescence devices.This study compared the performance of three laser fluorescence (LF) devices (DIAGNOdent Classic, DIAGNOdent Pen and KEY3 laser) under standardized laboratory conditions for detecting subgingival deposits of calculus on root surfaces of extracted teeth in typodonts.  The KEY3 showed greater accuracy (86.4 %) than the DIAGNOdent Pen (84 %) and DIAGNOdent Classic (80.2 %).  The intra-examiner reproducibility was also higher for the KEY3 (mean Cohen kappa 0.74) than the DIAGNOdent Pen (0.66) and DIAGNOdent Classic (0.6). 
DIAGNOdent Pen
Performance differences in the detection of subgingival calculus by laser fluorescence devices.This study compared the performance of three laser fluorescence (LF) devices (DIAGNOdent Classic, DIAGNOdent Pen and KEY3 laser) under standardized laboratory conditions for detecting subgingival deposits of calculus on root surfaces of extracted teeth in typodonts. 
KEY3 laser