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Updated: Mar 22, 2026
Knee Arthrocentesis in Adults
Published on: February 25, 2022
Single-needle arthrocentesis (Shepard cannula) vs. double-needle arthrocentesis for treating disc displacement
Wael Talaat1,2, Mohamed M Ghoneim2, Mohammed Elsholkamy2
1a Department of Oral and Craniofacial Health Sciences , College of Dental Medicine, University of Sharjah , Sharjah , UAE.
Objectives:
To compare single- vs. double-needle arthrocentesis with viscosupplementation for treating disc displacement without reduction of the temporomandibular joint.
Methods:
Fifty-six patients with a magnetic resonance imaging diagnosis of non-reducing disc displacement were included. Arthrocentesis with viscosupplementation was performed on patients in group I using the Y-shaped needle (Shepard cannula) technique; the standard double-needle technique was performed on patients in group II. Patients were evaluated on postoperative day 1, and 1, 3, and 6 months later, patient- and procedure-related parameters were assessed.
Results:
In both groups, significant improvement in the baseline levels was achieved (p < 0.01). Both techniques were equally effective at reducing pain and increasing the maximal mouth opening. The single-needle technique was easier to perform and required a shorter operative time (p < 0.01).
Discussion:
Single-needle (Shepard cannula) arthrocentesis can be an alternative to the standard technique; however, it might add to the cost of the procedure.
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