Principles in bone physiology.

Area of Science:

• Skeletal Physiology
• Biomechanics
• Bone Biology

Background:

• The traditional view posits non-mechanical agents (hormones, nutrients, genetics) as primary drivers of osteoblast and osteoclast activity.
• This paradigm fails to incorporate tissue-level features and biomechanical principles discovered post-1960.
• The Utah paradigm, proposed by Harold Frost, offers an alternative framework for understanding skeletal physiology.

Purpose of the Study:

• To challenge the obsolete view of non-mechanical agents dominating bone control.
• To highlight the significance of mechanical factors in postnatal bone mass and strength regulation.
• To present evidence supporting the Utah paradigm of skeletal physiology.

Main Methods:

• Review and synthesis of scientific literature on skeletal physiology.
• Comparison of the traditional paradigm with the Utah paradigm.
• Analysis of evidence supporting the dominance of mechanical factors in bone remodeling.

Main Results:

• Non-mechanical agents are secondary to mechanical factors in controlling bone strength and mass.
• The Utah paradigm accurately reflects the dominance of biomechanics in regulating bone.
• New evidence supports the Utah paradigm as a supplement to, rather than a replacement for, existing views.

Conclusions:

• Mechanical loading is the principal determinant of bone strength and mass.
• The Utah paradigm provides a more comprehensive understanding of skeletal physiology.
• Future research should integrate biomechanical principles into bone health studies.