Table 1 Tooth wear scoring system

Part a: dental morphotype

P₃

Anterior (1), posterior (2) and back (3) valley

P₄

Anterior (1) and back (3) valley

M₁

Dentine exposed in all cusps but all dentine fields isolated

M₃ Additional distal element (ADE)

Dentine exposed in the additional distal element but all dentine fields isolated

Part b: wear scoring system

P₃

0

3 valleys

1

2 valleys and trace of the third one

2

2 valleys and no traces of the third one

3

1 valley and traces of the others

4

1 valley, traces of another one and no traces of the third one

5

1 valley and no traces of the others

6

Traces of 1 o 2 valleys and no traces of the others

7

No traces of valleys

P₄

0

2 valleys

1

1 valley and traces of the other one

2

Traces of the 2 valleys

3

Traces of 1 valley and no traces of the other one

4

Traces of valleys

5

No traces of valleys

M₁ M₂ M₃

0

Dentine exposed connects the lingual and buccal slopes of the cusps but all dentine fields remain isolated

1

Dentine exposed connects the lingual-mesial and buccal-mesial and the lingual-distal and buccal-distal slopes of the mesial or distal cusp and one infundibulum is closed

2

Dentine exposed connects the lingual-mesial and buccal-mesial and the lingual-distal and buccal-distal slopes of the mesial and distal cusp and both infundibula are closed

3

1 infundibulum closed and reduced to less than half and the other still open

4

1 infundibulum closed and reduced to less than half and the other closed and isolated

5

1 infundibulum closed and reduced to less than half and the other closed and not isolated

6

2 infundibula closed, not isolated and reduced to less than half

7

1 infundibulum no longer recognizable and the other still open

8

1 infundibulum no longer recognizable and the other closed and isolated

9

1 infundibulum no longer recognizable and the other closed and not isolated

10

1 infundibulum no longer recognizable and the other closed and reduced to less than half

11

Both infundibola no longer recognizable

M₃ Additional distal element (ADE)

0

Not connected with other cusps

1

Dentine exposed connects respectively buccal or lingual sides of the additional distal element with the lingual-distal or buccal-distal slopes of the distal cusps

2

Dentine exposed connects buccal and lingual sides of the additional distal element with the lingual-distal and buccal-distal slopes of the distal cusps

3

Dentine exposed connects buccal and lingual sides of the additional distal element with the lingual-distal and buccal-distal slopes of the distal cusps with back fossa well visible

4

Dentine exposed connects buccal and lingual sides of the additional distal element with the lingual-distal and buccal-distal slopes of the distal cusps with traces of back fossa

5

Dentine exposed connects buccal and lingual sides of the additional distal element with the lingual-distal and buccal-distal slopes of the distal cusps with back fossa no longer recognizable