Bilateral hyperplasia of the coronoid process: A surgical approach

Authors

DOI:

https://doi.org/10.33448/rsd-v14i9.49422

Keywords:

Hyperplasia, Mandible, Trismus.

Abstract

Coronoid process hyperplasia (CPH) is a rare condition that affects the mandibular bone, characterized by excessive growth of the coronoid process, resulting in progressive limitation of mouth opening. The etiology of CPH remains uncertain, but factors such as genetic predisposition, hormonal stimuli, mandibular trauma, and hyperactivity of the masticatory muscles are commonly associated with its development. CPH occurs predominantly in men and usually presents bilaterally, negatively impacting patients’ quality of life by compromising functions such as eating and communication. Diagnosis is primarily made through computed tomography, which allows for a detailed evaluation of coronoid process morphology and helps distinguish CPH from other temporomandibular disorders. Treatment is predominantly surgical and includes two main techniques: coronoidectomy, which completely removes the coronoid process, and coronoidotomy, which sections the process without removing it. Both techniques have specific advantages, and the choice of approach—generally intraoral to reduce complications—is influenced by the surgeon’s experience and the needs of the case. The aim of the present study is to report the case of a patient who presented with a rare case of bilateral coronoid process hyperplasia, treated through surgical resection using the intraoral coronoidotomy technique with interposition of the buccal fat pad.

References

Almeida Neto, L. F., Marcelino, K. P., Barbosa, G. A. S., Macêdo, F. C., Dantas, W. R. M., Dantas, E. M., et al. (2020). Tratamento multidisciplinar de hiperplasia do processo coronoide. Research, Society and Development, 9(9), e256997375.

Ambereen, A., Bhutia, O., Roychoudhury, A., Yadav, R., Khakhla, D. H., & Vishwakarma, K. (2021). Is coronoidectomy superior to coronoidotomy for improving maximum incisal opening in patients with oral submucous fibrosis?. Journal of Oral and Maxillofacial Surgery, 79(4), 863-e1.

Farronato, M., et al. (2019). Bilateral hyperplasia of the coronoid process in pediatric patients: What is the gold standard for treatment? Journal of Craniofacial Surgery, 30(4), 1058–1063.

Goh, Y. C., Tan, C. C., & Lim, D. (2020). Coronoid hyperplasia: A review. Journal of Stomatology, Oral and Maxillofacial Surgery, 121(4), 397-403.

Jiang, W., et al. (2022). The regrowth of mandibular coronoid process after coronoidectomy: A retrospective analysis of 57 cases. Journal of Oral and Maxillofacial Surgery, 80(1), 151–161.

Khandavilli, S., et al. (2016). First case of bilateral coronoid hyperplasia in monozygotic twin sisters—A new aetiological perspective? Oral and Maxillofacial Surgery, 20(4), 441–443.

Liogi, R., et al. (2003). Hiperplasia bilateral do processo coronóide da mandíbula: relato de caso clínico. Revista Brasileira de Cirurgia Periodontia, 275–279.

McLoughlin, P. M., Hopper, C., & Bowley, N. B. (1995). Hyperplasia of the mandibular coronoid process: An analysis of 31 cases and a review of the literature. Journal of Oral and Maxillofacial Surgery, 53(3), 250–255.

Mulder, C. H., Kalaykova, S. I., & Gortzak, R. A. Th. (2012). Coronoid process hyperplasia: A systematic review of the literature from 1995. International Journal of Oral and Maxillofacial Surgery, 41(12), 1483–1489.

Neville, B. W., Damm, D. D., Allen, C. M., & Chi, A. C. (2016). Oral and maxillofacial pathology (4th ed.). WB Saunders.

Nogueira, C., et al. (2021). Treatment of hyperplasia of the coronoid process of the mandible in adults: Analysis of 42 literature reports and illustrative case. Revista Gaúcha de Odontologia, 69, e20210034.

Parmentier, G. I. L., et al. (2022). A systematic review of treatment and outcomes in patients with mandibular coronoid process hyperplasia. Journal of the Korean Association of Oral and Maxillofacial Surgeons, 48(3), 133–148.

Pereira, A. S. et al. (2018). Metodologia da pesquisa científica. [free ebook]. Santa Maria: Editora da UFSM.

Romano, M., et al. (2017). Bilateral coronoid hyperplasia: A report of six cases. Journal of Biological Regulators and Homeostatic Agents, 31(2 Suppl 1), 139–145.

Sanromán, J. F., et al. (2024). Endoscopically assisted intraoral coronoidectomy for treatment of coronoid hyperplasia. Journal of Craniofacial Surgery, 35(2), 636–638.

Shiying, S., et al. (2023). TGFB3 gene mutation associated with mandibular coronoid process hyperplasia: A family investigation. Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology, 136(2), e109–e115.

Shujaat, S., et al. (2023). Morphological characteristics of coronoid process and revisiting definition of coronoid hyperplasia. Scientific Reports, 13(1), 21049.

Tolentino, E. S., et al. (2018). Mandibular coronoid process hyperplasia: A case report. Revista CEFAC, 20(3), 400–405.

Wang, W. (2023). Congenital mandibular coronoid process hyperplasia and associated diseases. Oral Diseases, 29(6), 2438–2448.

Zhang, Y., et al. (2022). Two cases of bilateral coronoid process hyperplasia causing restricted mouth opening. West China Journal of Stomatology, 40(4), 476–482.

Published

2025-09-05

Issue

Section

Health Sciences

How to Cite

Bilateral hyperplasia of the coronoid process: A surgical approach. Research, Society and Development, [S. l.], v. 14, n. 9, p. e1414949422, 2025. DOI: 10.33448/rsd-v14i9.49422. Disponível em: https://rsdjournal.org/rsd/article/view/49422. Acesso em: 5 dec. 2025.