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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...

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 bone...

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.
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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.

Nursing Evaluation

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Related Experiment Video

Updated: May 21, 2026

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population

Published on: January 31, 2025

[QOL evaluation for osteoporosis].

¹Department of Regenerative and Transplant Medicine, Niigata University Graduate School of Medical and Dental Sciences, Japan.

Clinical Calcium

|June 2, 2012

Summary

Evaluating Health-Related Quality of Life (HRQOL) is crucial for osteoporosis patients. The Japanese Osteoporosis Quality of Life Questionnaire (JOQOL) assesses osteoporosis-specific HRQOL in Japanese individuals.

Area of Science:

Orthopedics
Rheumatology
Public Health

Context:

Osteoporosis significantly impacts patients' lives, causing pain, spinal deformities, and reduced physical function.
Health-Related Quality of Life (HRQOL) assessment is vital for managing osteoporosis.
Existing HRQOL measures may not fully capture the nuances of osteoporosis-specific impacts.

Purpose:

To introduce and describe the Japanese Osteoporosis Quality of Life Questionnaire (JOQOL) for assessing osteoporosis-specific HRQOL.
To provide a validated tool for evaluating the quality of life in Japanese patients with osteoporosis.

Summary:

The JOQOL, developed by the Japanese Society for Bone and Mineral Research, was first created in 1999 and revised in 2000.
The 2001 version of JOQOL comprises 38 items across six domains, utilizing a 5-point Likert scale (0-4).

Related Experiment Videos

Last Updated: May 21, 2026

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population

Published on: January 31, 2025

Scores range from 0 to 152, offering a comprehensive measure of HRQOL in osteoporosis patients.

Impact:

The JOQOL facilitates a more accurate understanding of the patient experience with osteoporosis.
It supports evidence-based treatment strategies by incorporating patient-reported outcomes.
This tool aids in monitoring treatment effectiveness and improving patient care for osteoporosis.