Objective: To develop a new low shrinkage composite (LSC) and compare its physical properties with currently available dental composites. Method: LSC was formulated with filler loading as high as 87% by weight and 74% by volume. LSC was compared to three composites including Z250^™ (3M), Heliomolar^® (Vivadent), Glacier^™ (SDI). The volumetric shrinkage of composite was determined utilizing Acuvol^™ (Bisco). Diametral Tensile Strength (DTS) and Flexural Strength (FS) were measured by universally accepted test methods. The wear resistance test was carried out using the Oral Wear Simulator 2000 (Proto-tech). A ceramic stylus was used and data was analyzed using Surfanalyzer (Federal) after 100K cycles.  A statistical analysis was performed using one way ANOVA.  Results: 1) LSC has the lowest shrinkage and the highest FS among the four composites. 2) LSC and Z250 showed lower abrasion than Heliomolar and Glacier. 3) LSC has lower attrition than Glacier. 4) LSC and Z250 have higher DTS than Heliomolar and Glacier.

Composites	LSC	Z250	Heliomolar	SDI Glacier
Shrinkage (vol %) (n=3)	1.57±0.01	2.20±0.05	2.47±0.03	3.12±0.05
Wear µm (Abrasion) (n=6)	11.8±2.2	11.4±4.4	19.3±4.1	23.8±2.4
Wear µm (Attrition) (n=6)	38.0±8.1	23.3±8.1	41.3±12.4	69.5±15.1
DTS (MPa) (n=8)	50.0±7.0	52.1±3.8	36.4±2.8	40.8±3.3
Flexural Strength (MPa) (n=5)	140.0±21.3	112.6±10.5	79.4±8.3	79.8±11.2

Conclusion: LSC has significant low shrinkage without degradation in mechanical properties and wear resistance in comparison with other composites.