Effect of Occlusal Appliances and Clenching on the Internally Deranged TMJ Space

Takuo Kuboki, Yasushi Takenami, Maria G. Orsini, Kenji Maekawa, Atsushi Yamashita, Yoshiharu Azuma, Glenn T. Clark

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


Aims: Stabilization appliances and mandibular anterior repositioning appliances have been used to treat patients with internal derangement of the temporomandibular joint (TMJ) based on the assumption that these appliances work by decompressing the TMJ. The purpose of this study was to indirectly test this assumption. Methods: Bilateral TMJ tomograms of 7 subjects with unilateral anterior disc displacement without reduction (ADDwor) were taken during comfortable closure and during maximum clenching in maximum intercuspation; tomograms were also taken with the 2 types of occlusal appliances in use. Outlines of the condyle and the temporal fossa were automatically determined by an edgedetection protocol, and the minimum joint space dimension of the joints with and without ADDwor was automatically measured for each experimental condition as the outcome variable. Results: Upon comfortable closure and maximum clenching, the minimum joint space dimensions of the ipsilateral and contralateral joints with the use of stabilization appliances and mandibular anterior repositioning appliances were not significantly different from those seen in maximum intercuspation. Conclusion: These findings do not indicate that these appliances induce an increase in joint space during closing and clenching in joints with ADDwor.

Original languageEnglish
Pages (from-to)38-48
Number of pages11
JournalJournal of Orofacial Pain
Issue number1
Publication statusPublished - 1999


  • Image-analyzing procedure
  • Mandibular anterior repositioning appliance
  • Stabilization appliance
  • Temporomandibular disorders
  • Tomogram

ASJC Scopus subject areas

  • Dentistry(all)
  • Clinical Neurology
  • Anesthesiology and Pain Medicine


Dive into the research topics of 'Effect of Occlusal Appliances and Clenching on the Internally Deranged TMJ Space'. Together they form a unique fingerprint.

Cite this