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Background: Achilles tendinopathy (AT) is a common and difficult to treat musculoskeletal disorder. Purpose: To examine whether 1 injection of platelet-rich plasma (PRP) would improve outcomes more effectively than placebo (saline) after 3 months in patients with AT. Study Design: Randomized controlled trial; Level of evidence, 1. Methods: A total of 24 patients with chronic AT (median disease duration, 33 months) were randomized (1:1) to receive either a blinded injection of PRP (n = 12) or saline (n = 12). The primary endpoint was improvement in Victorian Institute of Sports Assessment–Achilles (VISA-A) score at 3 months. Secondary outcomes were pain at rest, pain while walking, pain when tendon was squeezed, ultrasonographic changes in tendon thickness, and color Doppler activity. Patients were informed that they could drop out after 3 months if they were dissatisfied with the treatment. Results: After 3 months, all 24 patients were reassessed (no dropouts). No difference between the PRP and the saline group could be observed with regard to the primary outcome (VISA-A score: mean difference [MD], –1.3; 95% CI, −17.8 to 15.2; P = .868). Secondary outcomes were pain at rest (MD, 1.6; 95% CI, −0.5 to 3.7; P = .137), pain while walking (MD, 0.8; 95% CI, −1.8 to 3.3; P = .544), pain when tendon was squeezed (MD, 0.3; 95% CI, −0.2 to 0.9; P = .208), color Doppler activity (MD, 0.3; 95% CI, −0.2 to 0.8; P = .260), and tendon thickness (MD, 0.8 mm; 95% CI, 0.1 to 1.6 mm; P = .030). After the 3-month follow-up, a large dropout was observed: 75% of patients in the PRP group and 33% in the saline group. Conclusion: PRP injection did not result in an improved VISA-A score over a 3-month period in patients with chronic AT compared with placebo. The only secondary outcome demonstrating a statistically significant difference between the groups was change in tendon thickness; this difference indicates that a PRP injection could increase tendon thickness compared with saline injection. The conclusions are limited to the 3 months after treatment owing to the large dropout rate. [ABSTRACT FROM AUTHOR]

The article presents the study which examined the effectiveness of platelet-rich plasma (PRP) as a treatment for patellar tendinopathy. Among the measures used in the study are the Victorian Institute of Sports Assessment (VISA) score for patellar tendinopathy, the visual analog scale (VAS) for pain, and the Tegner activity scale. Based on the results, the apparent benefits of PRP as treatment dissipate over time.

The article reports a study to evaluate whether a single injection of platelet-rich plasma (PRP) is more effective than placebo (saline) or glucocorticoid in reducing pain in adults with lateral epicondylitis (LE) after 3 months. The results proved that neither PRP nor glucocorticoid was superior to saline in pain reduction in LE at the primary end point at 3 months. However, injection of glucocorticoid had a short-term pain reducing effect at 1 month in contrast to the other therapies.

Background: The authors developed a novel technique to improve tendon-bone healing by hybridizing calcium phosphate (CaP) with a tendon graft using an alternating soaking process. Hypothesis: Anterior cruciate ligament (ACL) reconstruction using the CaP-hybridized tendon graft would have a better clinical outcome and reduce the percentage of bone tunnel enlargement compared with a conventional method because of the enhanced anchoring between the tendon graft and the bone. Study Design: Randomized controlled trial; Level of evidence, 1. Methods: Patients (N = 64) with unilateral ACL rupture underwent arthroscopically assisted single-bundle ACL reconstruction using a 4-strand semitendinosus tendon or 4-strand semitendinosus and gracilis tendons with EndoButton femoral fixation and screw washer tibial fixation. These patients were equally randomized to undergo the CaP (n = 32) or conventional (n = 32) method using a transtibial tunnel approach according to the closed envelope method. In the CaP group, the tendon graft was hybridized with the CaP at both ends of the graft. One surgeon performed all reconstructions without knowing which graft was prepared. Patients’ backgrounds regarding age at surgery, gender, period before surgery, and associated meniscal injuries were similar in the 2 groups. All patients followed the same postoperative protocol. At 1 and 2 years after surgery, they were evaluated with the manual knee laxity test, KT-1000 arthrometry, International Knee Documentation Committee (IKDC) examination form, Tegner scale, and Lysholm scale. Also, 1 year postoperatively, bone tunnel enlargement was analyzed using computed tomography, intensity of the tendon graft by magnetic resonance imaging (MRI), and tendon graft appearance by arthroscopic examination. All the examinations were performed blindly. Results: All patients underwent a minimum 2-year follow-up. KT-1000 arthrometry data indicated statistically significant decreased average anterior tibial translation in the CaP group compared with the conventional method group: 1.0 6 2.0 mm versus 1.9 6 1.6 mm (P\.05), respectively, at 1 year; 1.6 6 2.1 mm versus 2.6 6 2.4 mm (P\.05), respectively, at 2 years. The Lysholm score was higher in the CaP group than in the conventional method group at 2 years (96.9 6 4.3 vs 91.7 6 13.3, P\.05). The CaP-hybridized tendon graft reduced the percentage of bone tunnel enlargement of the anteroposterior diameter at the main joint aperture site 1 year postoperatively (femoral side: 15.5% 6 13.4% vs 22.1% 6 16.4%, P\.05; tibial side: 19.3% 6 17.1% vs 26.1% 6 13.7%, P\.05). The results of the pivot-shift test, IKDC grade, and Tegner score; the intensity of the tendon graft (MRI); and arthroscopic appearance were not significantly different at both follow-up periods in the 2 groups. Conclusion: The CaP-hybridized tendon graft improved anterior knee stability and Lysholm scores at the 2-year follow-up and improved anterior knee stability and reduced the percentage of bone tunnel enlargement in both tunnels at the 1-year follow-up compared with the conventional method for single-bundle ACL reconstruction. However, longer follow-up is needed to investigate the appearance of any increased instability. [ABSTRACT FROM AUTHOR]