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Protocol for Developing a Femur Osteotomy Model in Wistar Albino Rats

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Published on: August 31, 2022

Vibration acceleration promotes bone formation in rodent models.

Ryohei Uchida^1,2,3, Ken Nakata³, Fuminori Kawano³

¹Department of Orthopedic Surgery, Osaka University Graduate School of Medicine, Osaka, Japan.

|March 7, 2017

Summary

Low-magnitude vibration acceleration significantly enhanced bone formation and healing in both ectopic bone formation and rib fracture models. Constant acceleration showed no significant effect on bone healing in these trunk models.

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Area of Science:

Biomedical Engineering
Orthopedics
Regenerative Medicine

Background:

Gravitational acceleration is ubiquitous, yet its influence on bone formation and healing modes remains unverified.
Understanding acceleration's impact is crucial for developing novel therapeutic strategies for bone repair.

Purpose of the Study:

To compare the effects of vibration and constant (centrifugal) accelerations on bone formation and healing.
To investigate the underlying mechanisms of acceleration's effects on bone in different models.

Main Methods:

Utilized BMP 2-induced ectopic bone formation (EBF) mouse and rib fracture healing (RFH) rat models.
Applied low- and high-magnitude vibration acceleration and constant (centrifuge) acceleration daily for 10 minutes.
Evaluated bone formation and healing using macroscopic, radiographic, histological, and micro-CT analyses.

Main Results:

Low-magnitude vibration significantly increased ectopic bone mass and bone volume in the EBF model.
Low-magnitude vibration significantly improved union rate and bone volume in the RFH model.
Constant acceleration showed no significant differences in bone formation or healing compared to controls in both models.

Conclusions:

Low-magnitude vibration acceleration effectively promotes bone formation and healing in the trunk.
The mechanisms by which vibration influences bone may differ between ectopic bone formation and fracture healing models.
Constant acceleration does not appear to enhance bone healing in these specific models.