ArticleActa orthopaedica et traumatologica turcica2025
Comparative effects of cyclooxygenase-2 selective and nonselective nonsteroidal anti-inflammatory drugs and acetaminophen on rotator cuff tendon-bone healing in a rat model.
Article in Acta orthopaedica et traumatologica turcica, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Objective: This study aimed to investigate and compare the e!ects of naproxen (a nonselective nonsteroidal anti-inflammatory drug [NSAID]), celecoxib (a cyclooxygenase (COX)-2 selective NSAID), and acetaminophen (an analgesic with minimal anti-inflammatory activity) on tendon and tendon-bone healing following surgically induced supraspinatus tendon repair in a rat model. Methods: In this experimental study, 56 adult male Wistar Albino rats (mean weight, 300 g) were randomized into 4 groups (n=14 per group): control (1% methylcellulose vehicle), naproxen, celecoxib, and acetaminophen. A standardized full-thickness tear of the supraspinatus tendon was surgically created, and repair was performed using transosseous suture fixation through a humeral bone tunnel. Postoperative treatments were administered via oral gavage for 14 days. Tendon healing was assessed at 28 days through histological evaluation using modified Bonar scoring (n=6 per group) and biomechanical testing via uniaxial tensile assays (n=8 per group). Primary outcome measures included Bonar scores, maximum tensile strength, displacement, and sti!ness. Results: The acetaminophen and control groups demonstrated superior maximum strength and sti!ness compared to the NSAID-treated groups; however, these di!erences did not achieve statistical significance (maximum strength: P=.28; sti!ness: P=.40). Histological analyses revealed significantly enhanced tendon-bone healing in the acetaminophen and control groups relative to the celecoxib and naproxen groups (P=.01). Conclusion: The early postoperative administration of COX-2 selective and nonselective NSAIDs may compromise early tendon-bone healing compared to acetaminophen. Although biomechanical di!erences were not statistically significant at 28 days, histological findings underscore the potential impact of analgesic selection on early postoperative tendon healing. Level of Evidence: N/A.
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