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Mnemonics, Simplified Concepts & Thoughts

Wound Strength

Epomedicine, Jul 5, 2025Jul 5, 2025

Last updated on July 5, 2025

Wound strength is determined by both quantity and quality of collagen and an appropriate balance of deposition and breakdown. The amount of collagen in a wound plateaus at several weeks post-injury.

Timeline:

1. First few weeks: Strength increases rapidly, reaching about 20% of pre-injury strength at 3 weeks. 

2. Around 6 weeks: Wound strength increases significantly, nearing about 80% of the original strength. 

3. 3 months: Wound strength reaches approximately 80% of its original strength. 

4. Beyond 3 months: Strength continues to increase slowly, but the wound area will likely never be as strong as the original skin, typically reaching about 70-80%. 

The tensile strength of the wound gradually increases over time. At 3 weeks, the wound has achieved 20% of its full strength. A wound’s maximum tensile strength peaks at 3 months, where it reaches at 80% of its pre-injury level.

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PGMEE, MRCS, USMLE, MBBS, MD/MS General Surgery

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Epomedicine. Wound Strength [Internet]. Epomedicine; 2025 Jul 5 [cited 2025 Jul 5]. Available from: https://epomedicine.com/medical-students/wound-strength/.

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