After extraction of the 3rd molar with mesial periodontal defect, osteotomy for 2nd molar implant is initiated in the mesial slope of the 3rd molar socket (Fig.1 red dashed line). The large mesial periodontal defect of the 3rd molar is probably related to traumatic occlusion associated with the third molar tilting after the 2nd molar extraction.
Xin Wei, DDS, PhD, MS 1st edition 12/01/2017, last revision 01/19/2020