A properly measured lower tooth should ensure that – • The operator uses a fulcrum to steady the tip and regulate the pressure of the tip contacting the target area. • The tip is in contact with the target area. • The tooth is centered in the image box. • The tooth image is not blurred. • The measurement should not include lip, tongue, opposing teeth, or operator’s fingers. • The glare is centered mesially/distally at the juncture of the incisal and middle thirds of the tooth.
If the glare were excessive in this area, it would be advisable to move the glare toward the incisal edge until it is minimized.
You might prefer to place the glare on the incisal edge, center it, and then tip the back of the ShadeVision instrument down very slowly until the glare artifact just begins to scatter off the incisal edge – hold still and then release the "Target" button to measure.
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