Effects of Prepolymerized Particle Size and Polymerization Kinetics on Volumetric Shrinkage of Dental Modeling Resins

Table 1

Volume-based PMMA particle size distribution.

Material	Median size*	Mean size^†	SD^‡	Mode size^§
JT (Jet Tooth Shade, control)	55.41	58.28	19.51	55.06
PK (Pi-Ku-Plast)	51.00	57.41	30.35	48.32
DL (DuraLay)	57.27	60.17	20.37	55.42
FR (Fino Resin PR)	64.89	74.80	44.57	63.31
GP (GC Pattern Resin)	110.15	116.27	53.74	124.80
GL (GC Pattern Resin LS)	125.71	127.12	59.70	143.32

All values are in μm. *The size that splits the volume distribution with half above and half below this diameter; ^†the volume mean diameter; ^‡standard deviation for the frequency distribution; §the peak of the frequency distribution.