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Periosteal response in translation-induced bone remodelling.
S A Feik1, G Ellender, D M Crowe
1School of Dental Science, University of Melbourne, Australia.
Journal of Anatomy
|August 1, 1990
Summary
Translation of transplanted bones causes periosteal strain and bone remodeling. Soft tissues surrounding the bone significantly influence this process, overriding internal bone strain effects.
Area of Science:
- Orthopedics
- Biomedical Engineering
- Cell Biology
Background:
- Bone translation during transplantation induces periosteal strain and subsequent bone remodeling.
- Understanding the periosteal response is crucial for bone healing and regeneration.
Purpose of the Study:
- To investigate the periosteal response to bone translation in an in vivo model, specifically examining the leading and trailing sides.
- To determine the influence of soft enveloping tissues on bone remodeling, independent of internal bone strain.
Main Methods:
- Utilized an in vivo rat model with caudal vertebrae transplanted onto pre-stressed helical torsion springs.
- Applied controlled translation to the bones, virtually eliminating internal bone strain.
- Analyzed tissue responses using optical and transmission electron microscopy.
Main Results:
- Compression on the leading side periosteum led to reduced formative activity and resorption.
- Tension on the trailing side periosteum resulted in accelerated formation and widening of periosteal layers.
- Periosteal changes, including cell and fiber alignment, reflected the direction of translation and remodeling.
- Remodeling direction reversed upon cessation of translation, with normal patterns restored upon equilibrium.
Conclusions:
- Enveloping soft tissues profoundly influence the nature and rate of bone remodeling.
- The periosteum acts as an integrated unit, modulating signals to osteoblasts for surface bone events.
- Bone remodeling in this model is driven by external soft tissue forces, not internal bone strain.