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Publication:
The Chinese Journal of Dental Research

Year 2002
Volume 5 , Issue 2

Back
Pages: 34 - 38

Measurement and Classification of Intra-articular Pressure in the Temporomandibular Joint with Anterior Disc Displacement without Reduction

Zhi Guang Zhang, MD/Yue Xu, DDS/You Hua Zheng, DDS/Yi Qing He, DDS/Kai Su, DDS/Zhuo Hui Chen, DDS

Objective: To establish the fluctuating curve of intra-articular pressure in the temporomandibular joint (TMJ) with anterior disc displacement without reduction and to discuss the mechanism of formation. Methods: Twenty-two affected sides were identified in 16 patients. A No. 8 syringe needle was used to pierce the upper compartment of the TMJ. The pre-arthroscopy intra-articular pressure was measured by the pressure transducer via the flexural rigid tubing in open and closed positions. The curve and mean value were documented. Results: The pressure values were classified into 3 types: high pressure, reverse pressure and low pressure. The first type manifested a general increase and wide amplitude in pressure averaging 7.11 17.87 mmHg in open position and 9.65 7.03 mmHg in closed position. Contradictory to the first type, the second type showed extraordinary variation in pressure, 7.48 8.49 mmHg in open position and -3.91 6.25 mmHg in closed position. The patients of the last type had significantly low negative intra-articular pressure, which averaged -114.49 91.61 mmHg in open position and -61.24 24.03 mmHg in closed position. Conclusion: The TMJs with anterior disc displacement without reduction can be classified into 3 types: high pressure, reverse pressure, and low pressure.

 

 

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