vertebroplasty vs kyphoplasty
DESCRIPTION
Pain from acute vertebral fracture appears to be due in part to instability (non-union or slow union at the fracture site), while more than 1/3 of patients become chronically painful. Traditional treatment for patients with painful VCFs includes bed rest, narcotic analgesics and bracing, resulting in increased pain because of acceleration bone loss and muscle weakness.TRANSCRIPT
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Vertebroplasty vs Kyphoplasty
George Sapkas
Associate Professor1st Orthopaedic Dpt
Medical SchoolAthens University
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• PainPain from acute vertebral from acute vertebral fracture appears to be fracture appears to be due in part todue in part to instability instability (non-union or slow union (non-union or slow union at the fracture site), while at the fracture site), while more than more than 1/31/3 of patients of patients become chronically become chronically painful.painful.
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• Traditional treatmentTraditional treatment for for patients with painful VCFs patients with painful VCFs includes bed rest, narcotic includes bed rest, narcotic analgesics and bracing, analgesics and bracing, resulting in increased pain resulting in increased pain because of acceleration bone because of acceleration bone loss and muscle weakness.loss and muscle weakness.
UthoffUthoff: JBJS 1978: JBJS 1978ConvertinoConvertino: Med Sci Exerc 1997: Med Sci Exerc 1997
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Investigations
Plain x-rays
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CT-scan
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M.R.I.
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Bone scanning
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Management of fractures in patients with osteoporosis
• In general early functional treatment is used to allow early restoration of function and weight bearing
• Fracture treatment should always be accompanied by an investigation of the bone mass in these patients
• Nutritional support and calcium and vitamin supplementation should be provided during the healing phase
Orthop. Clin. North Am 1990 Jan:21(1) 125-141
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Spinal fixation
Posterior stabilization
Vertebral body -pedicle enforcement
• Matchstick Cortical Bone-graft
• Cancellous Bone • Carbonated Apatite • Methylmethacrylate
etc
• Matchstick Cortical Bone-graft
• Cancellous Bone • Carbonated Apatite • Methylmethacrylate
etc
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Spinal fixation
Anterior - Posterior stabilization
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Spinal fixation
Vertebroplasty plus
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Complications
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Intra-operative
Cement leakage
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Early post-operative hardware failure
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Late post-operative hardware failure
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Minimal invasive techniques
Minimal invasive techniques
Vertebroplasty - KyphoplastyVertebroplasty - Kyphoplasty
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Vertebroplasty – KyphoplastyIndications
• Vertebral fractures (compression ± burst)
• Osteoporotic fractures (compression ± burst)
• Pathologic fractures of the spinal vertebra (metastasis)
• Haemangioma of the vertebra• Multiple myeloma
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• Destruction of the posterior spinal elements
• Burst fractures (±)• Neurologic compression syndromes
(due to dislocated bony fragments)• Destruction of dorsal structures
(vertebral arch and facet joints) • Vertebra plana• Spinal infection • Allergy
(methylmethacrylate etc)• Coagulopathy • Untreated cardiovascular disturbances
Vertebroplasty – KyphoplastyContraindications
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Vertebroplasty
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Vertebroplasty technique
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Extrapedicular - Transpedicular Extrapedicular - Transpedicular
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Contrast materialleakage
Contrast materialleakage
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Kyphoplasty Kyphoplasty
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Identification of landmarks and optimal Identification of landmarks and optimal position of instrumentationsposition of instrumentations
Transpedicular Correct PlacementTranspedicular Correct Placement
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Identification of landmarks and optimal Identification of landmarks and optimal position of instrumentationsposition of instrumentations
Too MedialToo Medial
Nerve root or Nerve root or Cord Injury Cord Injury CSF leakageCSF leakage
SolutionSolutionConstant MonitoringConstant Monitoring
of Insertion Pin of Insertion Pin TrajectoryTrajectoryCorrectCorrect
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Identification of landmarks and optimal Identification of landmarks and optimal position of instrumentationsposition of instrumentations
CorrectCorrect Too LateralToo Lateral
Burst fracture of Burst fracture of Vertebral wall Vertebral wall
SolutionSolution
Constant MonitoringConstant Monitoringof Insertion Pin of Insertion Pin
TrajectoryTrajectory
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TranspedicularTranspedicular
T9 – L5T9 – L5 Upper thoracic spine> T9
Upper thoracic spine> T9
T8T8T8T8
ExtrapedicularExtrapedicular
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Haemagioma – T8Haemagioma – T8
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COMPLICATIONS
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• The frequency of complications is 1.3% in osteoporosis
Service de neuroradiologie Charcot hospital de la Pitie-Salpetiere, Paris, France
vertebroplastyvertebroplasty
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• Cement leakage
(intevertebral disc)• In vertebroplasty cement In vertebroplasty cement
leakage is leakage is 65%65% in in metastases and metastases and 30%30% in in osteoporotic fractures.osteoporotic fractures.
CottonCotton: Radiology 1996: Radiology 1996ChirasChiras: J Neuro Radiol 1997: J Neuro Radiol 1997
vertebroplastyvertebroplasty
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• Cement leakageo spinal canal
o intervertebral disc
vertebroplastyvertebroplasty
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• Cement displacementanteriorly(vertebra plana)
vertebroplastyvertebroplasty
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Vertebral cortex fractureVertebral collapse
Vertebral cortex fractureVertebral collapse
Kyphoplasty
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SKy bone expander system for
percutaneous Kyphoplasty
Unilateral - BilateralUnilateral - Bilateral
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SKy bone expander system for
percutaneous Kyphoplasty
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SKy bone expander system for
percutaneous Kyphoplasty
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SKy bone expander system for
percutaneous Kyphoplasty
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OBSERVATIONS
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VERTEBROPLASTYVERTEBROPLASTY KYPHOPLASTYKYPHOPLASTY
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Vertebroplasty vs KyphoplastyVertebroplasty vs Kyphoplasty
• The risk of fracture in the adjacent levels is enhanced in the balloon kyphoplasty group
• The risk seems to be higher in patients with non recent fractures than in patients with recent fractures
Belkoff SM et alSpine 2001
Grobs J.S. et al J. Spinal Disord. 2005
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Vertebroplasty vs KyphoplastyVertebroplasty vs Kyphoplasty
• It remains unclear whether these new fractures above or below the enhanced vertebra(e) are due to the course of osteoporosis or to the increased stiffness of the stabilized vertebral body
Uppin AA et alRadiology 2993
Meltron LI et alOsteoporosis 1999
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Vertebroplasty vs KyphoplastyVertebroplasty vs Kyphoplasty
• Cement leakage is a significant problem related mainly with vertebroplasty
• In 25% of the vertebral bodies in the vertebroplasty group cement leakage to the epidural space or segmental vessels was detected.
• The reasons were o The lower viscosity of the PMMA.
o The destruction of the integrity of the vertebral structure
Philips FM et alSpine 2002
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Vertebroplasty vs KyphoplastyVertebroplasty vs Kyphoplasty
• It remains unclear whether these extravertebral deposits of PMMA cause deterioration of the local blood supply and contribute to the ongoing pain and other complications such as :o pulmonary embolismo Neurological complicationso Allergic reactions
Grobs J.S. et al J. Spinal Disord. 2005
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Vertebroplasty vs KyphoplastyVertebroplasty vs Kyphoplasty
Ballon Kyphoplasty
Significance Vertebroplasty
Significance
Decrease of wedge (%)
6.0 (0-9.5) P= 0.000004
0.0 (0.0 – 0.3) NS
Increase of height (%)
5.8 (0-10.6) P= 0.00001 0.0 (0.0 – 0.0) NS
Grobs J.G. et alJ. Spinal Disord. 2005
Grobs J.G. et alJ. Spinal Disord. 2005
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Vertebroplsaty vs KyphoplastyVertebroplsaty vs Kyphoplasty
Visual analog scale
Ballon Kyphoplasty
Significance Vertebroplasty Significance
Post operative 3.5 (2.5-5.9) P= 0.00003 3.0 (2.0 – 4.o) P=0.002
1. Year ODI (%)
2.7 (1.6-3.8)42 (25-52)
P= 0.0004P=0.03
5.7.0 (3.8 – 6.6)47 (31-56)
P=0.04
NS
2. Years ODI (%)
2.0 (0.5-5.3)56 (44-70)
P= 0.005NS
4.6 (0.6 – 6.3)52 (32-67)
P=0.03
NS
Grobs J.G. et alJ. Spinal Disord. 2005
Grobs J.G. et alJ. Spinal Disord. 2005
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CONCLUSIONS
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Vertebroplasty - Kyphoplastyare indicated in:
• Vertebral fractures (compression ± burst)
• Osteoporotic fractures (compression ± burst)
• Pathologic fractures of the spinal vertebra (metastasis)
• Haemangioma of the vertebra• Multiple myeloma
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• Destruction of the posterior spinal elements
• Burst fractures (±)• Neurologic compression syndromes
(due to dislocated bony fragments)• Destruction of dorsal structures
(vertebral arch and facet joints) • Vertebra plana• Spinal infection • Allergy
(methylmethacrylate etc)• Coagulopathy • Untreated cardiovascular disturbances
Vertebroplasty - Kyphoplasty
are contraindicated in:
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Vertebroplasty - Kyphoplastyadvantages
• May be performed under local anaesthesia as a day case
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Vertebroplasty - Kyphoplasty advantages
• Provide significant relief of pain
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• Is unable to restore the lost height of the vertebra
VERTEBROPLASTY disadvantages
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VERTEBROPLASTY
• It seems to be more favourable in recent vertebral fractures (osteoporotic etc) without major deformity
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VERTEBROPLASTYVERTEBROPLASTY
• No substantial loss of the obtained correction at the follow up
• No substantial loss of the obtained correction at the follow up
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Balloon Kyphoplasty advantages
• Restores sufficiently the height of the collapsed vertebra
• Is associated with inferior possibility of cement leakage
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Balloon Kyphoplasty disadvantages
• The risk of fracture in the adjacent levels is enhanced in the balloon kyphoplasty
• Increased operative time and radiation exposure
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KyphoplastySKy bone expander system
Advantages • Expandable rigid polymer
device rather than a hydraulic one
• This enables improved control over devices’ position and expansion direction and eliminates risk of device failure
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KyphoplastySKy bone expander system
• The fact that the SKy bone expander always expands to the same predefined shape and size is highly beneficial in treating vertebral fractures, when reconstruction controllability is of paramount importance
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