PT Exam- Tissue injury and healing Quiz 12- Tissue Injury and Healing 8 signs indicative of serious pathology Name 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 point How much force is required to tear collagen fiber?* 5 to 15 kg/mm2 15 to 25 kg/mm2 25 to 35 kg/mm2 Rate 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 Timeline Δ
