Abstract
The element structure of a biomechanical system subjected an action of external force factors is studied. The radiocarpal joint of wrist is regarded as biomechanical system. The scaphoid bone is one element of the biomechanical system under investigation. The morphometrical analysis of cuts made in scaphoid frontal plane is fulfilled. The increase of bone tissue density from the cut centre to its periphery is revealed. The significant difference of bone tissue density in proximal and distal parts is determined too. The revealed tendencies allow us to develop the recommendations of construction design for scaphoid osteosynthesis. 
 
 biomechanical system, modeling, morphometry, radiocarpal joint, scaphoid, spongy bone tissue, fracture.
Highlights
The radiocarpal joint, being one part of human wrist, forms a complex biomechanical system
Performing important functions in human life, this joint is subjected to an action of external forces and an influence of some internal factors that weaken its strength properties
The internal factors consist of different kind deceases, for example, osteoporosis, and time factor
Summary
The element structure of a biomechanical system subjected an action of external force factors is studied. The radiocarpal joint of wrist is regarded as biomechanical system. The scaphoid bone is one element of the biomechanical system under investigation. The morphometrical analysis of cuts made in scaphoid frontal plane is fulfilled. The increase of bone tissue density from the cut centre to its periphery is revealed. The significant difference of bone tissue density in proximal and distal parts is determined too. The revealed tendencies allow us to develop the recommendations of construction design for scaphoid osteosynthesis
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