West China Journal of Stomatology

Previous Articles     Next Articles

Measurement and Analysis of the Intra-articular Pressure in Temporomandibular Joint with Sudden-onset, Severe Closed Lock

XU Yue1,ZHANG Zhi-guang2,ZHENG You-hua2   

  1. 1.Dept.ofOrthodontics,West China College ofStomatology,Si- chuan University,Chengdu610041,China; 2.Dept.ofOral andMaxillofacial Surgery,Guanghua College ofStomatology,Sun Yat-sen University,Guangzhou510055,China
  • Received:2005-02-25 Revised:2005-02-25 Online:2005-02-20 Published:2005-02-20


Objective The study aims to find outthe fluctuating curve of the intra-articular pressure in temporomandibular joint with sudden-onset, persistent, severe closed lock and discuss the mechanism of its formation. We also investigate the effects of the arthrocentesis.Methods 20 affected sides in 16 patientswere collected. ANo.8 syringe needlewas used to pierce intothe upper compartment of TMJ. The pre-arthrocentesis intra-articular pressure was measured by the pressure transducer via the flexural rigid tubing at open and close bite. The curve and mean value were documented during the operation.Results The patientswith sud- den-onset, persistent, severe closed lock had significantly low negative intra-articular pressure in their affected temporomandible joints. The average pressureswas (-9.947±8.854) kPa at open bite and (-6.475±4.147) kPa at close bite.Conclusion The TMJs with sudden-onset, persistene, severe closed lock has particular characters on etiology and clinical behavior. Arthrocentesis is one of the effective treatments to the diseases.

Key words: sudden-onset, severe closed lock, pressure, temporomandibular joint disc, temporomandibular joint disor- der