The Journal of Bone and Joint Surgery (American) 78:618-32 (1996)
© 1996 The Journal of Bone and Joint Surgery, Inc.
Instructional Course Lecture |
Instructional Course Lectures, The American Academy of Orthopaedic Surgeons - Osteoporosis: Diagnosis and Treatment*
JOSEPH M. LANE, M.D. ,
EDWARD H. RILEY, M.D. and
PHILIP Z. WIRGANOWICZ, M.D. , LOS ANGELES, CALIFORNIA
An Instructional Course Lecture, The American Academy of Orthopaedic Surgeons
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Introduction
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Osteoporosis is characterized by decreased bone mass and increased susceptibility to fracture. Primary osteoporosis is defined as osteoporosis that occurs in an individual who has no endocrinopathy or other disease state that would account for the changes in bone mass. Osteoporosis affects 20 million individuals in the United States1. These individuals sustain more than 1.2 million fractures (including more than 280,000 fractures of the hip) annually; the estimated cost of treatment of such fractures was $10 billion in 19921,112. The absolute number and percentage of persons who have osteoporosis are expected to increase because of the prolonged longevity of the American population. The risk of a fracture of the proximal part of the femur increases with age, especially in women who are more than fifty years old92. Fractures of the proximal part of the femur are associated with a high rate of mortality, and most persons who . . . [Full Text of this Article]

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