Research Article
Reliability of Pederson Scale in Surgical Extraction of Impacted Lower Third Molars: Proposal of New Scale
Table 2
Kharma scale/relationship (position of the molar).
| | Mesioangular | 0 | | Horizontal/transverse | 1 | | Vertical | 2 | | Distoangular | 3 | | Depth | | | Level A: high occlusal level | 1 | | Level B: medium occlusal level | 2 | | Level C: deep occlusal level | 3 | | Ramus relationship/space available | | | Class 1: sufficient space | 0 | | Class 2: reduced space | 1 | | Class 3: no space | 2 | | Roots form | | | Convergent | 0 | | Divergent | 1 | | Bulbous | 2 | | Difficulty index | | | Very difficult | 7–10 | | Moderately difficult | 5–7 | | Slightly difficult | 3-4 | | Easy | 1-2 |
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