Open Access

Table I

Pederson difficulty index [11].

Variable Classification Value
Position of the molar Mesioangular 1
Horizontal 2
Vertical 3
Distoangular 4
Relative depth Class A 1
Class B 2
Class C 3
Relation with ramus and available space Class 1 1
Class 2 2
Class 3 3
Difficulty score Total
Easy 3–4
Moderate 5–6
Difficult 7–10

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