Can concrescence diagnosis be obtained merely by clinical and imaging examination? from clinical case to histology




Clinical Diagnosis; Oral Diagnosis; Diagnostic Techniques and Procedures; Oral Pathology; Tooth Abnormalities.


Concrescence is a rare type of union of two teeth, with no predisposition for a particular ethnicity, gender or age, specifically united by a portion of cementum, without the fusion of dentin, commonly reported in the posterior maxilla region, in most cases, this anomaly affects the second and third molars. Its diagnosis is suggested by radiographic images when there is proximity between two teeth, without signs of the periodontal ligament, or interdental bone between them, often showing a radiographic overlap. The lack of attention to these signs can lead to complications during endodontic and surgical procedures, such as unplanned extraction of the involved teeth, even leading to legal problems. The aim of this paper is to report a histologically proven case of concrescence between an erupted second molar largely compromised by caries and an impacted third molar, in addition to presenting a literature review, along with the histological aspect, about the subject.


Bancroft, J. D., & Stevens, A. (1996). Theory and Practice of Histological Techniques. (4a ed.), New York; Churchill Livingstone.

Berkovitz, B. K. B., Holland, G. R., & Moxham, B. J. (2004). Anatomia, embriologia e histologia bucal. (3a ed.), Porto Alegre Artmed.

Foran, D., Komabayashi, T., & Lin, L. M. (2012). Concrescence of permanent maxillary second and third molars: case report of non-surgical root canal treatment. J of Oral Scie. 54(1), 133-136.

Gunduz, K., Sumer, M., Sumer, A. P., & Gunhan, O. (2006). Concrescence of a mandibular third molar and a supernumerary fourth molar: Report of a rare case. Brit Dent J. 200(3), 141-2, feb 11.

Kardach, E. G., Sobieszczyk, M., & Sokalski, J. (2016). A Rare Case of Concrescence of Impacted Maxillary Molars. Dent. Med. Probl. 53, 2, 291–295.

Khanna, S., Sandhu, S., Bansal, H., & Khanna, V. (2011). Concrescence – a report of two cases. Int. J. Dent. Clin. 3, 75–76.

Neville, B., Damm, D. D., Allen, C., & Chi, A. (2016). Oral and maxillofacial pathology. (4a ed.), Philadelphia: Saunders.

Pereira, A. S., et al (2018). Methodology of cientific research. [e-Book]. Santa Maria City. UAB / NTE / UFSM Editors. Available at: handle/1/15824/Lic_Computacao_Metodologia-Pesquisa-Cientifica.pdf?sequence=1.

Romito, L. M. (2004). Concrescence: Report of a rare case. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 97, 325-7.

Sugiyama, M. I., Ogawa, Y. S., Tohmori, H., Higashikawa, K., & Kamata, N. (2007). Concrescence of teeth: cemental union between the crown of an impacted tooth and the roots of an erupted tooth. J of Oral Path & Med. 36(1), 60–2.

Syed, A. Z., Alluri, L. C., Mallela, D., & Frazee, T. (2016). Concrescence: Cone-Beam Computed Tomography Imaging Perspective. Case Reports In Dentistry, 2016, 1-4.




How to Cite

Delanora, L. A., Simon, M. E. de S., Rodriguez, E. A. S., Faverani, L. P., & Pavan, A. J. (2020). Can concrescence diagnosis be obtained merely by clinical and imaging examination? from clinical case to histology. Research, Society and Development, 9(9), e41996893.



Health Sciences