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Updated: Jan 9, 2026
Knee Arthrocentesis in Adults
Published on: February 25, 2022
Comparison of clinical outcomes between DDWOR and TMJ-OA patients treated with arthrocentesis and injectable PRF: a
Mehmet Zahit Baş1, Tahsin Tepecik2
1Department of Oral and Maxillofacial Surgery, Private Practice, Istanbul, Türkiye.
Objective:
To compare 12-month outcomes of single-session arthrocentesis with intra-articular injectable platelet-rich fibrin (i-PRF) in temporomandibular joint osteoarthritis (OA) vs disc displacement without reduction (DDWOR).
Study Design:
Single-center retrospective cohort of 89 consecutive patients (OA = 48, DDWOR = 41) treated by one surgeon.
Methods:
Double-needle lavage (∼100 mL saline) followed by intra-articular i-PRF (∼1.5 mL). Primary outcomes were pain on function (0-100 visual analog scale) and maximum interincisal opening (mm) measured at baseline (T0) and 12 months (T1). Two-tailed tests (α = 0.05) and Cohen's d were used.
Results:
Both groups improved significantly at T1 (P < .001). OA showed greater relative pain reduction (-66.4% vs -52.5%; d≈0.50), whereas DDWOR achieved larger functional gains (ΔMIO 5.34 vs 2.71 mm; +19.7% vs +8.8%; d≈0.77-0.84).
Conclusions:
Arthrocentesis plus i-PRF yields clinically meaningful 12-month improvements in both conditions, with greater pain relief in OA and greater mouth-opening gains in DDWOR, supporting individualized, goal-oriented TMJ management.
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