Joint replacement is one of the most successful operations in medical history. But it is an irreversible procedure: after joint replacement, there is no way back. How to know if the moment has come — or if there is still an alternative?

Sign 1: Pain at Rest and at Night

If the joint hurts not only during activity but also at rest — especially nighttime pain that wakes you up — this is a signal of serious destruction. In early stages of osteoarthritis, pain occurs only during activity and subsides at rest.

Sign 2: X-ray Shows “Bone-on-Bone”

The joint space on X-ray is completely absent — bones are rubbing against each other (Kellgren-Lawrence IV). This is an objective criterion that is hard to ignore. However: even with KL-IV, some patients retain acceptable function.

Sign 3: Range of Motion Limited >50%

Normal knee flexion is 130–150°. If less than 90° is available — quality of life suffers (cannot sit normally, climb stairs). For hip: inability to put on socks or shoes.

Sign 4: Leg Axis Deformity

Varus (bow-legged) or valgus (knock-kneed) deformity >15° creates uneven loading and accelerates destruction. Correction without prosthesis (osteotomy) is possible only in early stages.

Sign 5: NSAIDs No Longer Help

If ibuprofen, diclofenac, and other painkillers no longer relieve pain or require maximum doses — the inflammatory process is beyond medication control.

Sign 6: Walking Distance < 500 Meters

If you cannot walk 500 meters without stopping due to pain — this is significant functional limitation. Standard test: 6-minute walk test (6MWT).

Sign 7: You Avoid Daily Activities

Stopped going to the store, avoid stairs, gave up walks. Social isolation due to pain is a serious indicator.

Sign 8: Joint Instability

Sensation that the knee “gives way” or the hip joint “pops out.” This indicates destruction of the ligament apparatus and joint capsule.

Sign 9: Avascular Necrosis of Bone

Avascular necrosis of the femoral head stages III–IV (collapse of the joint surface) is a direct indication for joint replacement. In early stages (I–II), regenerative therapy can slow progression.

Sign 10: Age and Activity