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Related Concept Videos

Fractures: Bone Repair01:27

Fractures: Bone Repair

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 procedure...
Bone Remodeling and Repair01:31

Bone Remodeling and Repair

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...
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.
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...
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...

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Related Experiment Video

Updated: May 31, 2026

Creating Rigidly Stabilized Fractures for Assessing Intramembranous Ossification, Distraction Osteogenesis, or Healing of Critical Sized Defects
07:35

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

Published on: April 11, 2012

Managing bone defects.

Aaron Nauth1, Michael D McKee, Thomas A Einhorn

  • 1Department of Surgery, Division of Orthopaedics, St Michael's Hospital, University of Toronto, Toronto, Canada. aaron.nauth@utoronto.ca

Journal of Orthopaedic Trauma
|July 9, 2011
PubMed
Summary
This summary is machine-generated.

Managing bone defects from trauma and nonunion is challenging due to sparse evidence. Treatment requires integrating existing data with clinical principles and patient-specific factors for optimal orthopaedic trauma care.

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Establishment of a Segmental Femoral Critical-size Defect Model in Mice Stabilized by Plate Osteosynthesis
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Half-segmental Diaphyseal Bone Defect Model in Rats for Evaluating Bone Substitute Performance in Load-bearing Regions
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Half-segmental Diaphyseal Bone Defect Model in Rats for Evaluating Bone Substitute Performance in Load-bearing Regions

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Last Updated: May 31, 2026

Creating Rigidly Stabilized Fractures for Assessing Intramembranous Ossification, Distraction Osteogenesis, or Healing of Critical Sized Defects
07:35

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Published on: April 11, 2012

Establishment of a Segmental Femoral Critical-size Defect Model in Mice Stabilized by Plate Osteosynthesis
06:38

Establishment of a Segmental Femoral Critical-size Defect Model in Mice Stabilized by Plate Osteosynthesis

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Half-segmental Diaphyseal Bone Defect Model in Rats for Evaluating Bone Substitute Performance in Load-bearing Regions
04:32

Half-segmental Diaphyseal Bone Defect Model in Rats for Evaluating Bone Substitute Performance in Load-bearing Regions

Published on: December 30, 2025

Area of Science:

  • Orthopaedic Surgery
  • Trauma Management
  • Bone Defect Repair

Background:

  • Bone defects resulting from trauma and nonunion present significant clinical challenges in orthopaedic patient care.
  • Current literature offers various treatment options, but high-level comparative evidence is limited due to the rarity of these injuries.

Purpose of the Study:

  • To review the existing evidence for diverse treatment modalities used in managing bone defects.
  • To provide a comprehensive overview to aid clinicians in decision-making for complex orthopaedic trauma cases.

Main Methods:

  • Literature review of available evidence on bone defect management.
  • Synthesis of contemporary fracture management principles.
  • Consideration of patient and surgeon-specific factors.

Main Results:

  • A wide array of treatment options for bone defects are documented.
  • Evidence guiding the optimal management strategy remains relatively sparse.
  • Treatment decisions necessitate a multifactorial approach.

Conclusions:

  • Effective management of bone defects requires a thorough understanding of current evidence.
  • Integration of clinical expertise and patient factors is crucial for successful outcomes in orthopaedic trauma.
  • Further research is needed to strengthen the evidence base for bone defect treatments.