The most common third molar, followed by the third molar and cuspids. Symptoms such as alveolar bone resorption. Therefore, obstructive teeth that can cause these lesions should be extracted. Due to the malposition of the obstructed teeth, they are blocked by adjacent teeth and some of them may be completely encapsulated by bone tissue. Therefore, it is more difficult to extract an obstructed tooth than other teeth, because the gum has to be cut open if it is covered by the gum, the bone has to be removed if it is buried by the bone, and the crown has to be split and extracted in pieces if it is blocked by the neighboring teeth. Therefore, extraction of obstructed teeth takes longer time and there are more complications that may occur during and after the operation, such as bleeding, broken roots, damage to adjacent teeth, postoperative lower lip numbness, dry socket, etc.