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Table 4 Hardness, elastic modulus and degraded layer thickness of the different samples of femoral heads in relation to the in vivo times after implantation

From: Comparison of zirconia degradation in dental implants and femoral balls: an X-ray diffraction and nanoindentation study

In vivo time (h)

Hardness (GPa)

Average stiffness (N/mm)

Elastic modulus (GPa) Ec*

Degraded layer thickness (μm)

0

16.7 ± 0.6

110 ± 9

247.8 ± 12.3

0

1124

15.8 ± 0.4

105 ± 7

243.9 ± 11.0

20 ± 8

2207

15.2 ± 0.5

100 ± 10

240.7 ± 10.1

160 ± 29

2507

14.5 ± 0.6

95 ± 9

238.6 ± 13.1

390 ± 50

3120

14.0 ± 0.8

96 ± 7

230.0 ± 10.0

709 ± 95

3789

13.3 ± 0.4

88 ± 9

224.1 ± 12.8

1300 ± 201

4123

13.1 ± 0.4

87 ± 4

216.2 ± 10.9

1800 ± 301

5120

12.0 ± 0.8

84 ± 7

207.8 ± 12.7

3807 ± 278

5350

12.2 ± 0.4

83 ± 9

202.3 ± 14.8

5099 ± 413

5888

11.8 ± 0.8

81 ± 8

201.8 ± 10.8

5308 ± 555