The use of limited cone beam computed tomography in the diagnosis and management of a case of perforating internal root resorption.

AIM: To describe the use of cone beam computed tomography (CBCT) in the diagnosis and management of a maxillary lateral incisor with perforating internal root resorption (IRR).
SUMMARY: Root resorption is the loss of dentine or cementum as a result of osteoclastic cell action. IRR occurs exclusively as a result of pulpal inflammation. Until very recently, the diagnosis of internal and external resorptive defects has been limited to the information obtained from conventional radiographic techniques. This case report describes the use of CBCT in the diagnosis and treatment planning of a case of perforating IRR. Emphasis is given to the modifications made to the treatment procedures in view of the additional information obtained from the CBCT data. KEY LEARNING POINTS: • Internal root resorptive defects may perforate the external root surface, and this may not be detectable using conventional radiographic techniques; consideration of this should be made during diagnosis and treatment planning. • CBCT provides additional relevant information on the location and nature of root resorptive defects when compared with that provided by conventional radiographs. • CBCT findings may modify treatment planning, as well as the techniques that may be employed during both non-surgical and surgical endodontic treatment.