Arthroplasty

Question 1

Definition of Osteoarthritis

Answer 1

A chronic disorder of the synovial joint in which
- There is progressive softening and disintegration of articular cartilage accompanied by new growth of cartilage and bone at the joint margins (osteophytes),
- Cyst formation and
- Sclerosis in the subchondral bone,
- Mild synovitis, and
- Capsular fibrosis

Question 2

Identify A, B, C, D, E

Answer 2

A -> Osteophyte at the margin
B -> Sclerosis of Subchondral bone
C -> Subchondral Cysts
D -> Asymmetrical loss of joint space (cartilage erosion)
E -> Loose bodies may be present (FRAGMENTATION of osteochondral surface)

Question 3

Conservative & Surgery

Management of OA

Answer 3

Conservative:
R -> Rest
A -> Activity Modification
M -> Medication (Anti-inflammatory medication, supplements like glucosamine and chondroitin sulfate)
P -> Physical therapy
o
S -> Steroid injection

Surgery (If failed medical treatment):
1. Arthroscopic debridement
2. Realignment osteotomy
3. Arthroplasty (Joint replacement)

Question 4

Define Arthroplasty

Answer 4

Surgical refashioning of a joint aiming to relief pain and retain or restore movement

Question 5

What is avascular necrosis of the hip?

Answer 5

It is the death of bone due to ischemia

Question 6

Causes of AVN

Answer 6

Mnemonic (ASEPTIC)
A -> Alcohol, Arthritis (RA), Amyloidosis
S -> Steroid, SLE, Sickle cell disease
E -> Erlenmeyer flask (Gaucher’s disease)
P -> Pancreatitis
T -> Trauma
I -> Idiopathic, Infection
C -> Caisson disease

Question 7

Common site of AVN

Answer 7

1. Head of femur
2. Femoral Condyle
3. Head of humerus
4. Proximal poles of scaphoid
5. Talus

Question 8

Name the classification of AVN of the hip

Answer 8

Steinberg Classification