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Bone Disorders01:29

Bone Disorders

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...
Bone Remodeling01:40

Bone Remodeling

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.
What is the Skeletal System?01:02

What is the Skeletal System?

Overview
Osteoclasts in Bone Remodeling01:31

Osteoclasts in Bone Remodeling

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 bone...
The Functions of the Skeletal System01:22

The Functions of the Skeletal System

The most apparent functions of the skeletal system are support, protection, and movement. However, bone tissue also performs several other critical metabolic functions. For one, the bone matrix acts as a reservoir for a number of minerals important to the functioning of the body, especially calcium and phosphorus. These minerals, present in the bone tissue, can be released back into the bloodstream when required. Calcium ions, for example, are essential for muscle contractions and controlling...
Hormones and Bone Tissue01:17

Hormones and Bone Tissue

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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Related Experiment Videos

The "osteoporosis disease".

Giulio Guido1, Michelangelo Scaglione, Luca Fabbri

  • 1Orthopedic Division, University of Pisa, Pisa, Italy.

Clinical Cases in Mineral and Bone Metabolism : the Official Journal of the Italian Society of Osteoporosis, Mineral Metabolism, and Skeletal Diseases
|March 31, 2012
PubMed
Summary

Osteoporosis is a widespread, complex disease often poorly managed. This analysis covers its causes, risks, and treatments, emphasizing that patient care and prevention are not solely the surgeon's responsibility.

Related Experiment Videos

Area of Science:

  • Orthopedics
  • Endocrinology
  • Public Health

Background:

  • Osteoporosis is a significant global health issue characterized by compromised bone strength.
  • Current management strategies often fall short, leading to widespread and poorly controlled disease.
  • Fractures associated with osteoporosis result in substantial morbidity and healthcare costs.

Purpose of the Study:

  • To analyze the multifaceted reasons behind osteoporosis being a complex and poorly controlled condition.
  • To provide a comprehensive overview of osteoporosis, encompassing its etiopathogenesis, epidemiology, risk factors, diagnosis, and therapy.
  • To highlight the importance of integrated management for osteoporotic fractures and preventive strategies, extending beyond orthopedic surgical domains.

Main Methods:

  • Review of existing literature on osteoporosis.
  • Analysis of etiological and epidemiological data.
  • Evaluation of current diagnostic and therapeutic approaches.

Main Results:

  • Osteoporosis presents complex challenges due to its multifactorial nature.
  • Effective management requires a holistic approach addressing prevention, diagnosis, and treatment.
  • Patient care for osteoporotic fractures and preventive measures should involve multidisciplinary teams.

Conclusions:

  • Addressing the complexity of osteoporosis necessitates a broader perspective than traditional orthopedic management.
  • Integrated strategies for fracture management and prevention are crucial for better patient outcomes.
  • Improved control of osteoporosis requires collaboration among various medical specialties and public health initiatives.