Journal of Oral Medicine and Pain

Korean Academy of Orofacial Pain and Oral Medicine (대한안면통증구강내과학회)
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Posterior Disk Displacement in the Temporomandibular Joint: A Report of Two Cases

  • Kim, Jihoon (Department of Oral Medicine and Oral Diagnosis, School of Dentistry and Dental Research Institute, Seoul National University) ;
  • Kim, Moon-Jong (Department of Oral Medicine and Oral Diagnosis, School of Dentistry and Dental Research Institute, Seoul National University) ;
  • Kho, Hong-Seop (Department of Oral Medicine and Oral Diagnosis, School of Dentistry and Dental Research Institute, Seoul National University)
  • Received : 2016.05.28
  • Accepted : 2016.07.06
  • Published : 2016.09.30
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Abstract

Posterior disk displacement (PDD) of the temporomandibular joint (TMJ) is a rare condition and most descriptions of TMJ PDD are about the adhesion of superior TMJ in which the position of disk is relatively posterior to anteriorly translated condyle in open mouth position. However, there have been reports about truly posteriorly positioned disk to the condyle in closed mouth position. This type of PDD has been classified into three subtypes-thin flat disk type, grossly posterior displaced disk type, and perforated disk type. Here, we report two rare cases of TMJ PDD, one with thin flat disk and one with perforated disk. Its possible etiology, pathogenetic mechanisms, related signs and symptoms, differential diagnoses, and treatments were reviewed and discussed.

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References

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Cited by

  1. Difficulty in Closing Mouth in Patient with Disc Displacement: A Case Report vol.42, pp.1, 2017, https://doi.org/10.14476/jomp.2017.42.1.16