treatment of osteoporosis - weebly
TRANSCRIPT
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Treatment of Osteoporosis
Prof DH van Papendorp
SA Orthopaedic Journal
November 2002 Vol 1 No 2 pg 34-38
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Actions
Cell effect
Bone Effect
Target
Agents
Antiresorption
Osteoclast
Stabilisation
High turnover
Estrogen
Calcitonin
SERMs
Bishosphonates
Formation
Osteoblast
Increase
Low turnover
Vitamin D
Fluoride
Anabolic Steroids
PTH and PTHRP
Growth hormone
• Calcium
• Hip Protectors
• Balloon Kyphoplasty
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RISK FACTORS : CONTROL YES NO
• Smoking
• Alcohol
• Avoidance of dairy products
• Lack of exercise
• Caffeine
• Too many carbonated (“soft”) drinks
• High protein diet
• PO4
• Childless
2 or more YES
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Inactive osteoblasts
Osteoclasts
Active osteoblasts Osteoid tissue
1 2 3 4
Age 1% loss / yr
E 50-65 yr ® Trab bone loss 2-3%
ETIOLOGYETIOLOGY
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Biphosphonates
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General structure of pyrophosphate and
bisphosphonates
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How Bisphosphonates Work in Osteoporosis
Adapted from Rodan GA, Fleisch HA J Clin Invest 1996;97:2692–2696; Chesnut CH III et al Am J Med 1995;99:144–152;
Garnero P et al J Clin Endocrinol Metab 1994;79(6):1693–1700; Wasnich RD, Miller PD J Clin Endocrinol Metab 2000;85(1):
231–236; Chavassieux PM et al J Clin Invest 1997;100(6):1475–1480; Adami S Bone 1995;17(4):383–390; Epstein S Mayo Clin
Proc 2005;80(3):379–388.
Maintained or improved
microarchitecture
and mineralization
Bone
Turnover
Bone
Mineral
Density
Fracture
Risk
Bone
Strength
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Fluoride
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Vitamin D
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Calcium
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Age Daily / mg
• 1-9 800
• 10-18 1200
• 19-menopause 1000
• Pregnancy 1200 - 1500
• Breast feeding 1200 - 1500
• Men 1000
DAILY CALCIUM REQUIREMENTS
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CALCIUM SUPPLEMENTATION
Calcium Carbonate 40
Calcium Sulphate 36
Calcium Phosphate 30
Calcium Lactate 18
Calcium Gluconate 9
Calcium Malate 30
% Ca
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Structure of estradiol and raloxifene
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Anabolic Steroids
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Parathyroid Hormone
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Calcitonin
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PHYSICAL ACTIVITY
Weight bearing exercise
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GROWTH HORMONE
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xternal hip protectors are designed with a view to dispersing
the weight of a blow from the neck of the femur during a fall
or impact to the hip.
E
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