TABLE 4.

Taxonomy of tooth wear diagnosis, according to TWES 2.0

Category	Description	Example
1. Generalised severity no/mild/moderate/severe/extreme	The most severe generalised grade comes first	Generalised mild tooth wear
2. Localised severity no/mild/moderate/severe/extreme	It is subsequently combined, if applicable, with a different localised grade	Generalised mild tooth wear and localised severe tooth wear
3. Pathology no/yes	Tooth wear is “pathological” if it is moderate, severe or extreme AND at least one of the criteria from Table 3	Generalised mild tooth wear and localised severe pathological tooth wear
4. Origin Both chemical and mechanical Mainly chemical and partially mechanical Mainly mechanical and partially chemical Partially chemical and partially mechanical	The origin is either “mainly” or “partially” mechanical or chemical, depending if ≥ 50% or < 50% of the clinical signs of Table 3 indicate the cause respectively; and “both” in case of mechanical and chemical being both ≥ 50%	Mild generalised tooth wear and severe localised pathological tooth wear, mainly mechanical and partially chemical