关键词: 突发性严重绞锁, 压力, 颞下颌关节盘, 颞下颌关节紊乱病

Abstract:

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