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Related Concept Videos

Fractures: Bone Repair01:27

Fractures: Bone Repair

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Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the...
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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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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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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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Related Experiment Video

Updated: Nov 7, 2025

Creating Rigidly Stabilized Fractures for Assessing Intramembranous Ossification, Distraction Osteogenesis, or Healing of Critical Sized Defects
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Creating Rigidly Stabilized Fractures for Assessing Intramembranous Ossification, Distraction Osteogenesis, or Healing of Critical Sized Defects

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Managing bone loss in open fractures.

Andrew Adamczyk1, Bradley Meulenkamp1, Geoffrey Wilken1

  • 1The Ottawa Hospital, Division of Orthopaedics, University of Ottawa, Ottawa, Ontario, Canada.

OTA International : the Open Access Journal of Orthopaedic Trauma
|May 3, 2021
PubMed
Summary
This summary is machine-generated.

Segmental bone loss presents significant challenges for orthopaedic surgeons. Optimal management requires a multidisciplinary, step-wise approach focusing on bone and wound bed preparation, soft tissue health, and patient optimization.

Keywords:
bone losslower extremity fractureopen fracture

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Area of Science:

  • Orthopaedic Surgery
  • Regenerative Medicine
  • Trauma Surgery

Background:

  • Segmental bone defects present complex clinical and surgical challenges.
  • Current treatment options lack a clear consensus or definitive guidelines for optimal management.
  • Effective treatment necessitates careful consideration of multiple patient-specific factors.

Purpose of the Study:

  • To address key questions regarding the management of segmental bone loss.
  • To discuss common obstacles and challenges encountered in treating these injuries.
  • To review current and emerging treatment modalities for segmental bone defects.

Main Methods:

  • The article synthesizes existing literature and clinical experience.
  • It emphasizes a step-wise, multidisciplinary approach to patient care.
  • Focus is placed on bone and wound bed preparation, soft tissue management, and patient medical optimization.

Main Results:

  • Optimal outcomes depend on meticulous pre-operative planning and execution.
  • A coordinated, multidisciplinary strategy is crucial for success.
  • Addressing soft tissue health and patient comorbidities is paramount.

Conclusions:

  • There is a need for standardized guidelines in managing segmental bone loss.
  • A comprehensive, individualized approach enhances treatment efficacy.
  • Ongoing research and development are vital for advancing treatment options.