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Long-Term Pterygomandibular Ankylosis: Rare Presentation.

Andre Luis Costa Cantanhede1, Elesbão Ferreira Viana Junior1, Roque Soares Martins Neto1

  • 1Department of Oral and Maxillofacial Surgery, Presidente Dutra University Hospital, Barao de Itapari Street, 227 - Centro, Sao Luís, MA 65020-070 Brazil.

Journal of Maxillofacial and Oral Surgery
|April 11, 2022
PubMed
Summary

Pterygomandibular ankylosis, a rare condition causing jaw immobility, involves a bone bridge connecting the coronoid process to the sphenoid bone. Surgical management of a long-standing case yielded a satisfactory outcome.

Keywords:
AnkylosisMandibleSphenoidTrauma

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Area of Science:

  • Oral and Maxillofacial Surgery
  • Temporomandibular Joint Disorders
  • Skeletal Biology

Background:

  • Pterygomandibular ankylosis is a rare form of pseudo-ankylosis characterized by a bony union between the coronoid process and the sphenoid bone.
  • This condition represents an extra-articular manifestation of temporomandibular joint (TMJ) ankylosis, distinct from intra-articular fusion.
  • It can lead to significant functional impairment, including limited mouth opening and masticatory difficulties.

Observation:

  • A 34-year-old female patient presented with a 17-year history of pterygomandibular ankylosis.
  • The condition involved a substantial bony bridge, restricting temporomandibular joint (TMJ) mobility.
  • Clinical assessment confirmed the extent of the extra-articular fusion impacting the coronoid process and sphenoid bone.

Findings:

  • Surgical intervention was performed to address the extensive pterygomandibular ankylosis.
  • The surgical procedure successfully released the bony bridge, restoring mandibular mobility.
  • Post-operative evaluation demonstrated a satisfactory functional outcome with improved mouth opening.

Implications:

  • This case highlights the feasibility of surgical management for long-standing and severe pterygomandibular ankylosis.
  • Successful surgical release can significantly improve patient quality of life by restoring jaw function.
  • Further research into optimal surgical techniques and long-term outcomes for this rare condition is warranted.