Reliability of Pederson Scale in Surgical Extraction of Impacted Lower Third Molars: Proposal of New Scale

Table 4

Pederson scale * Kharma scale crosstabulation.

	Kharma scale				Total
	Easy	Slightly difficult	Moderately difficult	Very difficult
Pederson scale
Slightly difficult	17	18	2	0	37
Moderately difficult	4	18	20	9	51
Very difficult	0	4	2	6	12
Total	21	40	24	15	100