The activity of anterior temporal muscle, the number of tooth contacts, and total duration of closure during maximal and habitual clenching were studied in varied chair positions. Fifteen subjects were evaluated. The means for the muscle activity of anterior temporal muscle during habitual clenching were 63.5-73.5% of maximum muscle activity. The number of tooth contacts and total duration of closure were significantly increased as biting pressure was increased from habitual to maximal clenching. No significant differences were detected in all variables among varied chair positions. The above results also suggested that occlusal instability was very common. Further research is required to explain the relationship, if any, of these variables to craniomandibular disorders.
This article aims to report a rare case of traumatic long‐standing unilateral dislocation of temporomandibular joint (TMJ). To the best of our knowledge, this is the first reported case of unilateral TMJ dislocation in the paediatric population. A healthy 15‐year‐old boy presented to our department complaining of facial pain around the TMJ region. A diagnosis of unilateral left TMJ dislocation associated with myofacial pain was made based on history, clinical and radiographic examinations. Manual reduction alone was not successful to keep the reduced left condyle within the glenoid fossa. Intermaxillary fixation was needed to improve the treatment outcome. Non‐steroidal anti‐inflammatory drug was prescribed for myofacial pain. The management of this case was challenging contributed to the nature of clinical presentations.
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