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. Author manuscript; available in PMC: 2021 Jan 1.
Published in final edited form as: J Orthop Res. 2019 Oct 15;38(1):70–81. doi: 10.1002/jor.24487

Figure 3. Complete tear with immobilization mechanical properties.

Figure 3.

Tendon mechanical properties were altered with PEMF treatment. (A) Cross sectional area was larger for the 3 hour PEMF group at 1 week. (B) Stiffness was decreased at 1 and 3 weeks for 1 hour PEMF, and at 3 weeks for 3 hour PEMF. (C) Tissue modulus was decreased at 1 week for both treatment groups compared to controls. (D) Tanδ was decreased for the 3 hour PEMF group across tested frequencies, but (E) dynamic modulus was decreased for both PEMF groups at 3 weeks. (F) Hysteresis was increased for the 1 hour PEMF group across all phases of fatigue and for the 3 hour PEMF group at 50% fatigue life. (G) At 1 week, tendons in the 1 hour PEMF group failed at significantly lower loads than controls. Note that at 1 week post-op, only quasistatic parameters were measured. At 3 weeks, only quasistatic and viscoelastic parameters were reported due to the majority of samples failing prior to cyclic fatigue loading. Data is presented as mean+SD. Solid bars indicate significant differences (p<0.025).