Tooth germs of third molars develop at around 9 years of age and erupt between the ages of 17 and 25. Their agen­esis affects approximately 20% of the population. Resorp­tion is a physiological or pathological process that leads to a loss of dental hard tissue. As a result of odontoclastic activity, cementum and/or dentin are lost. External re­sorption of second molars caused by pressure from third molars is a pathological process. The severity of resorp­tion can be classified as mild (loss of less than half the dentin thickness), moderate (resorption of at least half the dentin thickness), or severe (extending to the pulp cham­ber). The risk of resorption depends on the position of the tooth germs of the third molars. The prognosis for second molars with asymptomatic resorption is favorable after the extraction of the causative third molars. These teeth usually require only periodic follow-up.

Aim

To present clinical cases in which radiographic examination confirmed resorption of second molars caused by the presence and abnormal eruption pathway of third molars.

Material and methods

In the seven presented clinical cases, patient history was obtained, clinical examination was performed, and radiographic imaging was planned, including panoramic radiography and CBCT.

Results

Resorption of second molars caused by third molars may be diagnosed in patients of various ages, both during the development of third molars and after their development is complete.

Conclusions

The occurrence of complications in the form of second molar resorption caused by third molars is difficult to predict. Correct positioning of the tooth germ on routine radiographic examination does not guarantee the absence of resorption in the future.