|Monomer change||Variables tested||Result|
|Pereira, S.G 
|Replace TEGDMA in Bis-GMA mixture with either CH3 Bis-GMA or CF3 Bis-GMA||Mechanical properties||The analogue CH3 Bis-GMA, which allows the preparation of medium-viscosity resins, is a good candidate to replace TEGDMA in Bis-GMA mixtures.materials with CH3 Bis-GMA diluents showed an enhanced microhardness.|
|Okamura, H 
|Experimental composite resins of
low-viscosity monomer mixtures
of newly developed polyfunctional acrylates
|Mechanical and physical properties||Mechanical (i.e., compressive, diametral tensile, and bending) strength of a polymer obtained from one new monomer mixture without fillers was similar to that of a bis-GMA/TEGDMA (2/1 weight ratio) based polymer.
In terms of setting shrinkage, the composites consisting of new monomer mixtures exhibited significantly smaller shrinkage than the bis-GMA based composites, and decreased with increase in filler content.
|Charton, C 
|co-monomer bis-GMA /TEGDMA (70/30 and 50/50 % and co-monomer UEDMA/TEGDMA
(88.5/11.5 and 66.5/33.5 %)
|Shrinkage stresses||The viscosities of the UEDMA bases were exactly the same as those of the bis-GMA ones.
Shrinkage stress Statistically, there was a negative correlation between viscosity, Tg and shrinkage stress.
|Prakki, A 
|Combining bis-GMA and TEGDMA, CH(3)bis-GMA or CF(3)bis-GMA, with aldehyde or diketone||Wear, roughness and hardness||The findings correlate with additives ability to improve degree of conversion of some composites/copolymers thereby enhancing mechanical properties.
Bis-GMA/TEGDMA and bis-GMA/CH(3)bis-GMA copolymers with additives became smoother after abrasion test.
|Prakki, A 
|Two additives, aldehyde or diketone,to Bis-GMA-based composites containing TEGDMA, (CH3Bis-GMA) or (CF3Bis-GMA).||Mechanical properties||The ability of additives to improve degree of conversion of some composite systems thereby enhancing mechanical properties.|
|Denis, A.B 
|Bis-GMA diluted with CH3bis-GMA
containing 0, 2, 8, 16 and 24 mol% propionaldehyde
|Physical, rheological, and mechanical
|24 mol% of Propionaldehyde significantly increased comonomer degree of conversion; Increased %DC is known to improve resin mechanical properties such as surface hardness|
|Prakki, A 
|Additives of Bis-GMA based copolymers andthat of TEGDMA, CH3Bis-GMA or CF3Bis-GMA.||Water sorption
|Aldehyde and diketone led to increases in the water sorption characteristics of experimental resins.|