Joint Fusion

Question 1

Arthrodesis

Answer 1

Joint Fusion - artificial induction of joint ossification. Remove damaged joint tissue and facilitate healing such that bones unite

Question 2

Arthrodesis used to treat…

Answer 2

1. Pain
2. Disability
3. Decreased function and range of motion
4. Instability

As a result of fractures disrupting the joint, OA< RA, joint instability and infection

Question 3

Biomechanical effects of carpal fusion

Answer 3

1. Change in carpal positioning
2. Reduced wrist motion
3. Altered force transmission
4. Reduced grip strength
5. Four-corner fusion (pain relief, patient satisfaction, ROM, grip strength)

Question 4

Surgical Fusion Reasons

Answer 4

1. Degenerative disc disorder
2. Fractured vertebra
3. Disc herniation
4. Spondylosis
5. Scoliosis
6. Sponylolisthesis
7. Tumour

To alleviate pain, stabilise the spine and maximise axial load bearing.

Question 5

Reasons for Lumbar Fusion

Answer 5

1. Scoliosis
2. Spondylolisthesis
3. Stenosis
4. Disc herniation
5. Disc degeneration

Question 6

Types of spinal fusion

Answer 6

1. Posterolateral (bone graft placed between transverse processes, vertebrae fixed with stabilising construct)
2. Interbody (IVD removed, bone graft placed in the removal site, typically better fusion rate, anterior to posterior approach)

Question 7

Biomechanical effects of spinal fusion

Answer 7

1. Alters load transmission (increase pressure in adjacent discs)
2. Adjacent segments compensate for ROM