10. Mesioangular impaction 43% Least difficult Horizontal impaction 3% More difficult than mesioangular ones Vertical impaction 38% Third in difficulty Distoangular impaction 6% Most difficult
15. Envelope incision Posterior ï laterally to avoid lingual n. Three-cornered flap Release incision: M of the 2 nd molar. 1. Gain adequate access through a properly designed soft tissue flap