- Perceptibility and acceptability thresholds for colour differences in dentistry
- Journal of Dentistry
- Volume | Issue number
- 42 | 6
- Pages (from-to)
- Document type
- Faculty of Dentistry (ACTA)
Data on acceptability (AT) and perceptibility thresholds (PT) for colour differences vary in dental literature. There is consensus that the determination of ΔE* is appropriate to define AT and PT, however there is no consensus regarding the values that should be used. The aim of this clinical review was to provide a systematic approach to the topic of colour science of high clinical relevance to dental research.
Materials and methods
MEDLINE/PubMed, WoS and EBSCO databases were searched up to January 7, 2013; the outcome was restricted to English, and to clinical studies were spectrophotometers were used for measurement.
Forty-eight studies were eligible and met the inclusion criteria. Of the 48 studies there appeared to be a trend in their source references: 44% referred to the same study for the PT (ΔE* = 1); and 35% referred to the same article for the AT (ΔE* = 3.7).
More than half the studies defined PT as ΔE* = 1, and one third of the studies referred to ΔE* = 3.7 as the threshold at which 50% of observers accepted the colour difference. Most clinical studies refer to the same few in vitro literature that have attempted to determine PT and AT from decades ago.
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