A radiograph from year 1999 showing the whole tooth 46. The tooth was vital and no periapical changes could be seen. Most probably the pulp is unaffected by the resorption.
Cervical resorption should be surgically cleaned and filled (e.g. with a composite filling) without delay when detected. In the present case, untypically slow development, possible late detection, and uncertainty of the correct diagnosis may have been the reasons for the delay in starting the treatment.