. Author manuscript; available in PMC: 2013 Aug 1.

Published in final edited form as: Dent Mater. 2012 May 10;28(8):e118–e126. doi: 10.1016/j.dental.2012.04.021

Table 3. Nanohardness, form factor and particle size of medium particles.

Material	Nano-Hardness (GPa)	Form Factor	Mean Particle Size (μm)
Glass	1.310 (0.150) [0.11]	1 (0) [0]	88.35 (8.24) [0.09]
Millet	0.279 (0.170) [0.61]	0.68 (0.20) [0.29]	8.07 (4.05) [0.50]
PMMA	0.279 (0.095) [0.34]	1 (0) [0]	28.95 (8.74) [0.30]
Poppy	0.226 (0.146) [0.65]	0.70 (0.30) [0.43]	14.08 (7.20) [0.50]

*Values displayed in [ ] represent COV