PT Exam- Tissue injury and healingQuiz 12- Tissue Injury and Healing8 signs indicative of serious pathologyName First Last At what percent of stretch do collagen fibers begin to fail?* 3 to 5% 6 to 8% 9 to 11%Where on the stress strain curve do collagen fibers fail ?* Ultimate stress Necking Failure pointHow much force is required to tear collagen fiber?* 5 to 15 kg/mm2 15 to 25 kg/mm2 25 to 35 kg/mm2Rate of tissue healing (%)first 2 weeks2 to 6 weeks3 months Clot formation begins*MinutesHoursdaysweeksmonths Tissue Healing and Scar Formation TimelineCapillary budding begins*MinutesHoursdaysweeksmonths Tissue Healing and Scar Formation TimelineFibroblast formation begins*MinutesHoursdaysweeksmonths Tissue Healing and Scar Formation TimelineMuscle to skin wound closure complete*MinutesHoursdaysweeksmonths Tissue Healing and Scar Formation TimelineTendon and ligaments wound closure complete*MinutesHoursdaysweeksmonths Tissue Healing and Scar Formation TimelineScar tissue remains stretchable*MinutesHoursdaysweeksmonths Tissue Healing and Scar Formation TimelineScar tissue shrinkage completed*MinutesHoursdaysweeksmonths Tissue Healing and Scar Formation TimelineΔ
