TABLE 5.

Classification system of tooth wear, according to TWES 2.0

Generalised	Mild		Tooth wear,	Both chemical and mechanical Mainly chemical/mechanical Partially chemical/mechanical
	Moderate	Pathological		Both chemical and mechanical Mainly chemical/mechanical Partially chemical/mechanical
	Severe	Pathological		Both chemical and mechanical Mainly chemical/mechanical Partially chemical/mechanical
	Extreme	Pathological		Both chemical and mechanical Mainly chemical/mechanical Partially chemical/mechanical
Localised	Mild			Both chemical and mechanical Mainly chemical/mechanical Partially chemical/mechanical
	Moderate	Pathological		Both chemical and mechanical Mainly chemical/mechanical Partially chemical/mechanical
	Severe	Pathological		Both chemical and mechanical Mainly chemical/mechanical Partially chemical/mechanical
	Extreme	Pathological		Both chemical and mechanical Mainly chemical/mechanical Partially chemical/mechanical
Generalised = 3 to 6 sextants; localised = 1 or 2 sextants; mild = grade 1; moderate = grade 2; severe = grade 3; extreme = grade 4; pathological: see Table 3 mainly/partially/both: see Table 4