Conclusion A significant change in shade of teeth when dehydrated was detected by both instrumental and visual assessment. Teeth became lighter and perceivable colour change had not returned to baseline shade within 30min of rehydration. Therefore shade matching procedures should be carried out before the teeth are exposed to dehydration. Clinical significance As most dental procedures lead to dehydration of teeth which can alter their shade and may lead to errors in shade matching. To avoid unacceptable mismatch of colour between natural teeth and dental restoration it is important that the shade matching procedure is carried out at the beginning of the appointment. (Source: Journal of Dentistry)
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