“…For example, consider the two use scenarios where abrasion of a similar plastic product ocurrs by sanding (ranges from 1 to 300 J/s based on sander used) or chewing (average male jaw around 61 J/s). − For example, using a power input of sanding of 1 J/s for the PETG-2% composite, the abrasion rate is calculated by multiplying the slope (Figure ) by the power input, 0.3064 × 1, to obtain a value for the abrasion rate of 0.31 g/m 2 /s . In this manner, values of abrasion during sanding are calculated to range from 0.28 to 83 g/m 2 /s, 0.30 to 90 g/m 2 /s, and 0.31 to 92 g/m 2 /s for PETG-0, PETG-0.5, and PETG-2, respectively. , For chewing, an estimation of the power input is calculated assuming a mean molar force for males of 383.9 N based on an average male jaw length of 118.5 mm , and an instantaneous chew time of 0.75 s to obtain a estimated power of 61 J/s. Composite abrasion is then calculated as 0.3064 × 61 = 19 g/m 2 /s.…”