<>Objective: The purpose of this study was to evaluate the physical properties of resin temporary cements including three dual-cured: Experimental (EXP, Kerr), Tempbond Clear (TBC, Kerr), Provilink (PRO, Ivoclar Vivadent) and one self-cured: Neo-Temp (NEO, Waterpik). Methods: Depth of cure (DOC) was determined using a ring mold (Ф10x8mm, light cure 10s, n=3). Shore A hardness was obtained (n=3) according to ASTM D2240 approximately 1hr after the specimens were prepared via self-cure. Specimens of translucency were prepared using a ring mold (Ф20x1mm, n=3) and self-cured.  The translucency was measured approximately 2hrs after curing by a spectrophotometer (BYK-Gardner TCS+ 8870).  For the bonding strength, a temporary crown and bridge material (Temphase) knob was prepared in a cylindrical mold (Ф7.6x4mm) and then bonded to the dentin with a cement via self-cure.  The shear bond strength was tested (n=4) after the bonded specimens were stored at 37°C for 24hrs. Results:

	EXP	TBC	PRO	NEO
DOC (mm, 10s)	8±1a *	8±1a	2±0b	0c
Hardness (Shore A)	90±1a	91±1a	91±2a	90±1a
Translucency (%, 1mm)	88.5±2.0a	65.9±1.5b	13.3±0.5c	13.8±0.7c
Bonding Strength to Dentin (psi)	14.0±4.1a,b	7.8±5.3b	1.6±0.5b	24.7±13.5a

  *Means with the same letter within the same row are not statistically different (p=0.05).

ANOVA analysis (p<0.05) showed that EXP and TBC had much higher DOCs than PRO and NEO. The hardness of all tested cements was not statistically different. EXP had the highest translucency among all tested cements. The bonding strength obtained with EXP was not significantly different from other cements, most likely due to the large standard deviations of the results. Conclusion:  EXP exhibited high translucency and moderate bonding strength, providing high esthetics and effective retention for cementing temporaries such as veneers.