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Updated: May 10, 2026
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Knee Arthrocentesis in Adults
Published on: February 25, 2022
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Can protrusive movements during TMJ arthrocentesis improve final results?
Eduardo Grossmann1, Rodrigo Lorenzi Poluha2
1Dentistry Faculty, Federal University of Rio Grande Do Sul, Coronel Corte Real Street, 130, 90630-080, Porto Alegre, Brazil.
Summary
Single-puncture temporomandibular joint (TMJ) arthrocentesis effectively manages disk displacement without reduction (DDwoR). Incorporating protrusive movements during TMJ arthrocentesis significantly improved maximal interincisal distance compared to techniques without these movements.
Area of Science:
- Oral and Maxillofacial Surgery
- Orthodontics
- Pain Management
Background:
- Temporomandibular joint (TMJ) disk displacement without reduction (DDwoR) is a common condition.
- Arthrocentesis is a minimally invasive procedure for TMJ disorders.
- Optimizing TMJ arthrocentesis techniques is crucial for improving patient outcomes.
Purpose of the Study:
- To compare the efficacy of single-puncture TMJ arthrocentesis with and without protrusive movements for DDwoR.
- To evaluate the impact of technique variations on maximal interincisal distance (MID), pain perception, and operation duration.
Main Methods:
- A randomized, double-blind study involving 36 patients diagnosed with DDwoR.
- Two groups (N=18 each) received TMJ arthrocentesis using a concentric needle-cannula system.
- Group 1 included protrusive movements; Group 2 did not. MID, VAS pain scores, and operation duration were recorded.
Main Results:
- Group 1 showed significantly greater MID after 1 year compared to Group 2 (p<0.001).
- Both techniques significantly reduced pain perception (VAS), with no intergroup difference.
- Operation duration (OP) showed no significant difference between the groups.
Conclusions:
- TMJ arthrocentesis, with or without protrusive movements, effectively improves MID in DDwoR patients.
- The addition of protrusive movements during TMJ arthrocentesis may offer enhanced functional improvement in MID.
- Protrusive movements did not significantly affect pain reduction or procedure time.
