Structural and mechanical assessment of developing chick tendon

摘要: Abstract Changes in macroscopic stress-strain characteristics were used to assess alterations tendon microstructure during chick morphogenesis. Five periods of development observed: post fertilization days 14 (stage 40), 16 42), 17 43), 21 H0), 23 H2). The shapes the curves, ultimate tensile strength, and strain failure follow changes biomechanical properties development. strength increased from 2.05 MPa (1 MPa= 10 6 N/m 2 ) at stage 40 58.05 hatching. A statistically significant increase measured was observed between 42 43. Strain 13% 40, 22% 42, 29% for stages 43, H0, H2. total collagen assessed by measuring hydroxyproline content. Hydroxyproline/g dry weight each successive morphogenesis ranged 39.17 mg/g 83.41 Dry 12.91% 20.19% over same period. mean fibril diameter approximately 45 nm 62 nm. distribution unimodal all stages, but changed a tight 42) broad