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Related Concept Videos

Bone Disorders01:29

Bone Disorders

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Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
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Osteoclasts in Bone Remodeling01:31

Osteoclasts in Bone Remodeling

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Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during...
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Bone Remodeling01:40

Bone Remodeling

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Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
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Hormones and Bone Tissue01:17

Hormones and Bone Tissue

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The endocrine system produces and secretes hormones, which interact with the skeletal system. These hormones control bone growth, maintain bone once it is formed, and remodel it.
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
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Role of Vitamins in Maintaining Bone Health01:25

Role of Vitamins in Maintaining Bone Health

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The growth and maintenance of bone are regulated by a combination of nutritional factors, including vitamins, such as vitamin A, B12, C, D, and K.
Vitamin A
Vitamin A is involved in the process of bone remodeling. Retinoic acid, the active metabolite of Vitamin A, has nuclear receptors in osteoblasts and osteoclasts, which are involved in bone remodeling.
Vitamin B12
Vitamin B12 acts as a cofactor during the formation of osteoblast-related proteins, such as osteocalcin. Vitamin B12 plays a role...
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What is the Skeletal System?01:02

What is the Skeletal System?

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Overview
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Osteoporosis: A Review.

Suzanne N Morin1, William D Leslie2, John T Schousboe3

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This summary is machine-generated.

Osteoporosis affects millions, increasing fracture risk in older adults. Effective treatments include antiresorptive and anabolic medications, alongside lifestyle changes and fracture liaison services, to reduce fractures and improve outcomes.

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Area of Science:

  • Gerontology
  • Orthopedics
  • Pharmacology

Background:

  • Osteoporosis is a prevalent condition characterized by low bone mass and fragility, leading to significant morbidity, mortality, and economic burden.
  • Globally, osteoporotic fractures impact a substantial portion of the population over 50, with 1 in 3 women and 1 in 5 men affected.

Purpose of the Study:

  • To outline current management strategies for osteoporosis, focusing on pharmacological interventions and supportive care.
  • To highlight the importance of risk assessment and personalized treatment approaches for fracture prevention.

Main Methods:

  • Review of risk factors for osteoporosis, including demographics, medical history, and bone mineral density (BMD) measurements.
  • Evaluation of therapeutic options: antiresorptive agents (bisphosphonates, denosumab) and anabolic medications (teriparatide, abaloparatide, romosozumab).
  • Assessment of the role of fracture liaison services and lifestyle modifications (calcium, vitamin D, exercise) in managing osteoporosis.

Main Results:

  • Antiresorptive agents are recommended for high-risk patients to reduce vertebral and hip fractures.
  • Anabolic medications are indicated for very high-risk individuals, often followed by antiresorptive therapy.
  • Fracture liaison services significantly improve medication initiation and adherence, reducing subsequent fractures.

Conclusions:

  • Osteoporosis management requires a multifaceted approach combining pharmacotherapy, lifestyle adjustments, and coordinated care.
  • Early identification of high-risk individuals and timely intervention with appropriate treatments are crucial for mitigating fracture risk and improving patient outcomes.