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Fractures & Repair. Male vs. Female Pelvis. Female Structure (All related to female pelvis functioning as a birth canal): Iliac bones more flared Angle of pubic arch greater > distance b/t ischial spines Sacral curvature shorter & wider Bones lighter. Osteopenia/Osteoporosis.
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Male vs. Female Pelvis Female Structure (All related to female pelvis functioning as a birth canal): • Iliac bones more flared • Angle of pubic arch greater • > distance b/t ischial spines • Sacral curvature shorter & wider • Bones lighter
Osteopenia/Osteoporosis • In early adulthood, the activity of osteoblasts & osteoclasts are about equal • Bone is constantly being remodeled • In late adulthood, the balance shifts & osteoclasts start tearing more bone down • In females, the lack of estrogen enhances the ability of osteoclasts to absorb bone. • Since the osteoblasts (the cells which produce bone) are not encouraged to lay down more bone, the osteoclasts win and more bone is lost than is produced.
Symptoms of Osteoporosis • Trabeculae are lost & spaces develop in bone • Spaces fill in with fibrous & fatty tissue • “Fragility fractures” result • Loss of bone density • Loss of bone mass
Risk Factors for Osteoporosis • Post-menopausal females • Genetics • Low dietary calcium • Lack of weight-bearing exercise • Smoking • Drinking alcohol • Recent weight loss • Caucasian or Asian women with slight build • Older age
Diagnosis & Treatment of Osteoporosis • Both diseases are assessed by measuring BMD (bone mineral density) • Osteopenia is defined as 1 to 2.5 standard deviations below the mean for BMD • Osteoporosis is a BMD of at least 2.5 std. dev. below the mean • Medication (biophosphonates 1X weekly or monthly) to build bone • Weight-bearing exercise 30 min. daily • 1.000-1,500 mg daily of Ca • 200 IU Vit D
Disorders of the Skeletal System • Of the vertebral column: kyphosis – an exaggerated thoracic curvature (rounded shoulders & hunchback) scoliosis – abnormal lateral curvature pf the vert. column lordosis – accentuated lumbar curvature
Disorders of the Vert. Column • Kyphosis Scoliosis Lordosis→
Osgood-Schlatter Disease • commonly seen in a growing child and adoles- cent • this is b/c the bones are typically growing faster than the muscles and tendons, so they have a tendency to become tight. • most often seen in preteen and teenage boys from 9 to 13 years old. • occasionally diagnosed in girls ages 8 to 13.
Osteogenesis Imperfecta • Commonly called “Brittle Bone Disease” • The classic symptoms include: • weak bones, which makes them susceptible to fractures • usually below average height • blue tint to the whites of their eyes (blue sclera) • multiple bone fractures • early hearing loss • loose joints (hypermobility) and flat feet • the development of poor teeth • bowed legs and arms • the severity of the disease varies greatly