Joint fusion Flashcards
Briefly describe the process of joint fusion
Removal of diseased cartilage
Bone ends are removed and both ends are fused using fixation
What symptoms is it used to treat (4)
Pain
Loss of motion
Instability
Disability
What conditions is it used to treat (4)
Rheumatoid Arthritis
Osteoarthritis
Joint fractures
Infection
Intercarpal fusion sites?
Any adjacent vertebrae
Four-corner fusion
What carpal bones are fused in four-corner fusion
Scaphoid is excised
Capitate, Lunate, Hamate, Triquetrum
What is an indication for four-corner fusion
Kienböck’s disease - avascular necrosis of the lunate
Biomechanical effects (3)
Reduced wrist motion
Reduced grip strength
Altered force transmission
Types of non-surgical carpal fusion
Osseous calcification
Non-osseous calcification
These are both congenital
What is a Block Vertebrae
When adjacent vertebral bodies do not separate but dont result in a change of height for a vertebra in that region
Indications for spinal fusion (6)
Spondylolisthesis Scoliosis Compression fracture Degenerative disk Disc herniation Spondylosis
Objectives of spinal fusion
Alleviate pain
Stabilise the spine
Maximise axial load bearing
2 types of spinal fusion
Posterolateral
Interbody
Describe the process of interbody spinal fusion
IVD removed and bone cage is placed to prevent collapse
Bone graft is placed in the cage (bone graft is able to be left on its own)
Fix with screws/plates/rod
Briefly outline posterolateral fusion
Bone grafts are placed between transverse processes and fused
Biomechanical effects of spinal fusion
Alters load transmission - increased pressure in adjacent disks
Adjacent segment pathology: adjacent segments compensate for range of motion and degenerate
