Answer:

For individuals with grade two knee osteoarthritis, like you, injecting hyaluronic acid (HA) or platelet-rich plasma (PRP) can be suitable treatment options. However, the mechanisms of action for each method are entirely different.

HA is a natural component of joint fluid. When a joint degenerates, the amount of HA gradually decreases, reducing its ability to lubricate and absorb shock. Supplemental HA injections help reduce friction between joint surfaces, making the joint smoother, improving pain symptoms, and increasing mobility. HA injections do not stimulate new cartilage formation; they primarily maintain a favorable joint environment to protect the intact cartilage tissue.

Doctor examines a patient with knee osteoarthritis. Illustration: Tam Anh General Hospital

In contrast, PRP injection is a biological therapy that uses platelet-rich plasma separated from the patient's own blood. The growth factors in PRP promote wound healing, reduce inflammation, support tissue repair processes, and improve the biological environment within the joint.

A musculoskeletal specialist will prescribe either HA or PRP injections after examining and specifically assessing each case. This decision depends on the patient's age, the extent of joint damage, and their mobility needs.

The effectiveness of both HA and PRP is not permanent. After injection, pain and joint stiffness symptoms may decrease for a certain period. The response time varies for each person, depending on the severity of osteoarthritis, lifestyle, and treatment responsiveness. Patients need to maintain foundational treatment measures such as weight management, rehabilitation exercises, strengthening muscles around the joint, and adjusting activities that overload the knee joint to achieve long-term effectiveness.

In patients with severe knee osteoarthritis, where the joint space has narrowed significantly or there are obvious joint deformities, the effectiveness of both HA and PRP injections is very limited. They primarily help partially improve symptoms, offering no significant long-term benefits for joint function.

You should visit a specialized medical facility for a comprehensive assessment by a doctor regarding the extent of your osteoarthritis, symptoms, and any co-existing conditions. This will help in choosing the optimal treatment method to ensure effectiveness and safety.

Master. Doctor Hoang Thi Quynh Anh

Department of Musculoskeletal Medicine

Tam Anh Cau Giay General Clinic