Related Experiment Video
Updated: Feb 5, 2026

Full-Endoscopic Isolation Zone Technique for the Treatment of Lumbar Disc Herniation
Published on: April 7, 2023
Evaluation of effusion and articular disc positioning after two different arthrocentesis techniques in patients with
Primo Guilherme Vargas Pasqual1, Rodrigo Lorenzi Poluha2, Ênio Tadashi Setogutti3
1Department of Dentistry, Faculty of Medicine, Federal University of Rio Grande do Sul , Porto Alegre, RS, Brazil.
Objective:
To evaluate joint effusion and positioning of the articular disc through magnetic resonance imaging (MRI) before and after two different arthrocentesis techniques.
Methods:
Twenty-six patients with dislocation of the articular disc without reduction (ADDwoR) were included and randomly divided into two groups: single needle arthrocentesis with distention of the upper compartment of the TMJ (A1) and conventional arthrocentesis with 2 needles (A2).
Results:
A statistically significant difference was observed between the different effusion categories (p = 0.009). No differences were found comparing both treatment modalities concerning the position of the mandibular condyle and the articular disc.
Conclusion:
Conventional arthrocentesis was able to change the effusion variable, whereas the single needle arthrocentesis was not. Both techniques were responsible for altering the position of the mandibular head or the disc-head complex, projecting them to a more anterior position related to the increase in the final maximum interincisal distance.
Related Concept Videos
Position and Displacement
Position and Displacement Vectors
Further, several important kinds of...
Design Example: Calculating Safe Diameter for Wind-Exposed Disc
Reactions at the Benzylic Position: Oxidation and Reduction
Behavior of Gas Molecules: Molecular Diffusion, Mean Free Path, and Effusion
Pleural Effusion I: Introduction
There are two main types of pleural effusion: transudative and exudative. They are differentiated using Light's...

