Table 1.

Criteria for evaluating surface characteristics

	Criterion and Magnification	Appearance	Scores
A	Surface relief ×100	Very smooth	4
		Smooth	3
		Rough	2
		Very rough	1
B	Regularity of surface structure ×300	Completely regular	4
		Almost Regular	3
		Partially regular	2
		Not regular	1
C	Portion of surface irregular ×300	< 10% of cut surface	4
		11–25% of cut surface	3
		26–50% of cut surface	2
		> 50% of cut surface	1
D	Position of the irregular area ×300	No irregularities	4
		Peripheral only	3
		Large region	2
		All over	1