“…Numerous other stimuli lead to external root resorption, such as reimplantation of teeth, 6,7 periapical inflammation, tumors or cysts, excessive mechanical or occlusal forces, 7 extreme orthodontic movements, 8 tooth impactions, 7 supernumerary teeth, 9 and periodontitis. 10 External root resorption has also been hypothesized to occur as a result of endocrine imbalances and systemic conditions (Table 1 [11][12][13][14][15][16][17][18][19][20][21][22] ). In some cases, a familial pattern was noted.…”