Related Experiment Video
Updated: Aug 13, 2026

Full-Endoscopic Isolation Zone Technique for the Treatment of Lumbar Disc Herniation
Published on: April 7, 2023
Disc position and morphology in patients with nonreducing disc displacement treated by injection of sodium
S Sato1, M Sakamoto, H Kawamura
1Department of Oral and Maxillofacial Surgery I, Tohoku University School of Dentistry, Sendai, Japan. shuichi@mail.cc.tohoku.ac.jp
Abstract:
Disc position and morphology were examined in 21 patients (22 joints) with nonreducing disc displacement of the temporomandibular joint (TMJ) at more than 12 months after undergoing injection of sodium hyaluronate into the superior joint space. The patients' clinical signs and symptoms improved during the follow-up period. In all patients, the disc was displaced anteriorly on mouth closure and did not reduce into the normal position during mouth opening at follow-up, whereas a normal disc position was found in all the controls. In the patients, the disc deviated from the normal biconcave configuration found in all of the controls on the follow-up magnetic resonance imaging (MRI). Disc displacement apparently is persistent and continued disc deformity common in patients, although the clinical signs and symptoms improved.
More Related Videos
Related Concept Videos
Herniated Intervertebral Disc l: Introduction
Degenerative Disc Disease I: Introduction
Degenerative Disc Disease ll: Pathophysiology

