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

Table 6

Pederson scale * Parant scale crosstabulation.

	Parant scale				Total
	Extraction by forceps	Extraction requiring osteotomy	Extraction requiring osteotomy and; coronal section	Complex extraction
Pederson scale
Slightly difficult	14	19	2	2	37
Moderately difficult	2	24	22	3	51
Very difficult	0	8	4	6	12
Total	16	51	28	5	100