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Table 1 Material properties of the rat patellar tendon for the 4 groups (Mean ± SD)

From: Effect of prostaglandin E2 injection on the structural properties of the rat patellar tendon

Group

Ultimate Stress (MPa)

Strain to Ultimate Load (mm/mm)

Elastic Modulus (MPa)

Energy Density to Ultimate Load (mJ/mm3)

Control

26.2 ± 6.8

0.34 ± 0.08

84.5 ± 23.2

4.66 ± 2.38

Saline

21.6 ± 4.7

0.28 ± 0.06

83.2 ± 17.1

3.14 + 0.98

PGE2-4 wks

27.1 ± 5.3

0.31 ± 0.09

90.0 ± 18.2

4.47 + 1.67

PGE2-8 wks

28.2 ± 5.9

0.24 ± 0.05

124.0 ± 35.0*,#,+

3.96 ± 1.22

F-test

P = 0.091

P = 0.053

P = 0.004

P = 0.226

  1. * Indicates difference from control group (P < 0.05) # Indicates difference from saline-injected group (P < 0.05).+ Indicates difference from PGE2-4 wks injection group (P < 0.05).