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Related Concept Videos

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 Structure01:55

Bone Structure

Within the skeletal system, the structure of a bone, or osseous tissue, can be exemplified in a long bone, like the femur, where there are two types of osseous tissue: cortical and cancellous.
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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...

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An Improved Mechanical Testing Method to Assess Bone-implant Anchorage
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Modeling and experimentation of bone drilling forces.

JuEun Lee1, B Arda Gozen, O Burak Ozdoganlar

  • 1Carnegie Mellon University, Department of Mechanical Engineering, Pittsburgh, PA 15213, USA.

Journal of Biomechanics
|January 28, 2012
PubMed
Summary

A new mechanistic model accurately predicts bone drilling forces, crucial for orthopaedic surgery. This model helps optimize drilling conditions and design better surgical drill bits, enhancing patient safety.

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Area of Science:

  • Biomechanical Engineering
  • Orthopaedic Surgery
  • Materials Science

Background:

  • Bone drilling forces significantly impact orthopaedic surgery outcomes.
  • Uncontrolled forces can lead to complications like drill breakage and bone damage.

Purpose of the Study:

  • To develop and validate a mechanistic model for predicting thrust forces and torques during bone drilling.
  • To improve the safety and efficiency of orthopaedic surgical procedures.

Main Methods:

  • A mechanistic model incorporating variable drill geometry and specific energy formulation was developed.
  • Calibration involved experimental drilling tests on bovine tibia.
  • Validation was performed using different feed rates and spindle speeds.

Main Results:

  • The model accurately predicted bone drilling forces, aligning well with experimental data.
  • Significant variations in forces were observed between different animal bone samples.
  • The model demonstrated effectiveness across a range of drilling conditions.

Conclusions:

  • The developed model provides a reliable method for predicting bone drilling forces.
  • It can aid in selecting optimal drilling parameters and designing improved orthopaedic drill bits.
  • The model supports advancements in robotic surgery and surgical planning.