Ahlbäck classification of knee osteoarthritis
The Ahlbäck classification is one of many ways to grade knee osteoarthritis.
Classification
- grade 1: joint space narrowing (less than 3 mm)
- grade 2: joint space obliteration
- grade 3: minor bone attrition (0-5 mm)
- grade 4: moderate bone attrition (5-10 mm)
- grade 5: severe bone attrition (more than 10 mm)
History and etymology
This classification was proposed by Ahlback et al. in 1968.
See also
Related Radiopaedia articles
Arthritides
- autoimmune
- degenerative
-
osteoarthritis (mnemonic)
- post-traumatic osteoarthritis
- erosive osteoarthritis
- grading
- Kellgren and Lawrence system
- osteoarthritis of the hip - grading
- osteoarthritis of the knee - grading
- rapidly destructive osteoarthritis of the hip
- osteoarthritis of the hand
- osteoarthritis of the knee
- scaphotrapeziotrapezoidal (STT) arthritis
- osteoarthritis of the vertebral column
- osteoarthritis of the TMJ
- primary cystic arthrosis of the hip
- secondary synovial osteochondromatosis
-
osteoarthritis (mnemonic)
- depositional
- infectious
- miscellaneous disorders
- related articles
Knee pathology
The knee is a complex synovial joint that can be affected by a range of pathologies:
- bone and cartilage
-
knee fractures
- distal femoral condyle fracture
- tibial plateau fracture (classification)
- patella fracture
-
avulsion fractures of the knee
- arcuate complex avulsion fracture (arcuate sign)
- anterior cruciate ligament avulsion fracture
- biceps femoris avulsion fracture
- iliotibial band avulsion fracture
- patella fracture
- posterior cruciate ligament avulsion fracture
- reverse Segond fracture
- Segond fracture
- semimembranosus tendon avulsion fracture
- Stieda fracturechronic avulsion injuries
- dislocation
- chondromalacia patellae
- osteoarthritis of the knee
- osteochondral defects
- osteochondritis dissecans of the knee
- pattern of bone contusion in knee injuries
-
knee fractures
- ligaments
- anterior cruciate ligament tear
- anterior cruciate ligament ganglion cyst
- anterior cruciate ligament mucoid degeneration
- posterior cruciate ligament tear
- medial collateral ligament tear
- lateral collateral ligament tear
- medial patellofemoral ligament tear
- posterolateral corner injury
- posteromedial corner injury
- tendons
- meniscal lesions
- bursosynovial lesions
- fat pad
- popliteal fossa
- fascia
- alignment
- knee
- patellofemoral
- gamut
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