ESS 150 Lecture Notes - Lecture 5: Ultimate Tensile Strength, Myofibroblast, Bone Healing
12 Apr 2018
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Document Summary
New tissue slowly gains strength and flexibility. Collagen fibers reorganize, the tissue remodels and matures and there is an overall increase in tensile strength (maximum strength is limited to 80% of the pre-injured strength) The maturation phase varies greatly from wound to wound often lasting anywhere from 21 days to 2 years. Area becomes more stable with permanent cells and structure. Type i collagen is found in skin, connective tissue, bone. Type i collage: more resistant, insoluble, cross-links with less fluid in area. Wolff"s law: bone and soft tissue will respond to the physical demands placed on them, causing them to remodel or realign along lines of tensile force. Injured structures must be exposed to progressively increasing loads throughout the rehabilitation process. Inflammation phase: immobilization is recommended to facilitate healing. Repair phase: controlled activity, flexibility and strength with support. Remodeling phase: aggressive active range of motion and strengthening exercises to facilitate tissue remodeling.
