A dental composition comprising (a) a dental resin and (b) a filler, wherein the dental resin is selected from a compound of the following formulae: or wherein the dental resin is a 2,2,4,4-tetramethyl-1,3-cyclobutandiol (TMCD) Resin 1 obtained by a one-step condensation reaction comprising reacting a preformed ICEM from 2,4,4- (2,2,4)-trimethyl-hexanediisocyanate (TMDI) and 2-hydroxyethylmethacrylate (HEMA), and TMCD 0.02 mol in the presence of dibutyltin dilaurate under a dry air atmosphere at a temperature from 30°C to 35°C for 14 hours, wherein2,6-di(tert-butyl)-4-methylphenol was added as an inhibitor to the reaction system, or wherein the dental resin is a TMCD Resin 2 obtained by a one-step condensation reaction comprising reacting TMCD and 2-isocyanatoethyl methacrylate in the presence of dibutyltin dilaurate under a dry air atmosphere at a temperature from 30°C to 35°C for 4 hours, wherein BHT was added to the reaction system as an inhibitor, or wherein the dental resin is a TMCD Resin 4 obtained by a two-step condensation reaction comprising reacting TMCD and slight excess of isophorone diisocyanate, (IPDI), followed by a reaction between the NCO-terminated prepolymer and 2-hydroxyethyl methacrylate, wherein the first reaction was carried out in the presence of dibutyltin dilaurate under a dry air atmosphere at a temperature from 30°C to 35°C for 4 hours, wherein BHT was added to the resulting prepolymer as an inhibitor, or wherein the dental resin is a TMCD Resin 5 and 6 obtained by a two-step condensation reaction comprising reacting TMCD and a slight excess of TMDI or IPDI in the presence of dibutyltin dilaurate under a dry nitrogen atmosphere at a temperature from 30°C to 35°C for 4 hours to form NCO-terminated prepolymers, wherein triethyleneglycol dimethacrylate (TEGDMA) was used as inert diluent, followed by end-capping reaction with 2-hydroxyethyl methacrylate, wherein BHT was added as an inhibitor, or wherein the dental resin is a TMCD Resin 7 obtained by a two-step condensation reaction comprising reacting TMCD and a slight excess of TMDI or IPDI in the presence of tin 2-ethylhexanoate (T-9) catalyst under a dry air atmosphere at a temperature from 30°C to 35°C for 4 hours to form NCO-terminated prepolymers, wherein TEGDMA was used as an inert diluent, followed by end-capping reaction with 2-hydroxyethyl methacrylate, wherein BHT was added as an inhibitor. (a) a dental resin and (b) a filler, or wherein the dental resin is a 2,2,4,4-tetramethyl-1,3-cyclobutandiol (TMCD) Resin 1 obtained by a one-step condensation reaction comprising reacting a preformed ICEM from 2,4,4- (2,2,4)-trimethyl-hexanediisocyanate (TMDI) and 2-hydroxyethylmethacrylate (HEMA), and TMCD 0.02 mol in the presence of dibutyltin dilaurate under a dry air atmosphere at a temperature from 30°C to 35°C for 14 hours, wherein2,6-di(tert-butyl)-4-methylphenol was added as an inhibitor to the reaction system, or wherein the dental resin is a TMCD Resin 2 obtained by a one-step condensation reaction comprising reacting TMCD and 2-isocyanatoethyl methacrylate in the presence of dibutyltin dilaurate under a dry air atmosphere at a temperature from 30°C to 35°C for 4 hours, wherein BHT was added to the reaction system as an inhibitor, or wherein the dental resin is a TMCD Resin 4 obtained by a two-step condensation reaction comprising reacting TMCD and slight excess of isophorone diisocyanate, (IPDI), followed by a reaction between the NCO-terminated prepolymer and 2-hydroxyethyl methacrylate, wherein the first reaction was carried out in the presence of dibutyltin dilaurate under a dry air atmosphere at a temperature from 30°C to 35°C for 4 hours, wherein BHT was added to the resulting prepolymer as an inhibitor, or wherein the dental resin is a TMCD Resin 5 and 6 obtained by a two-step condensation reaction comprising reacting TMCD and a slight excess of TMDI or IPDI in the presence of dibutyltin dilaurate under a dry nitrogen atmosphere at a temperature from 30°C to 35°C for 4 hours to form NCO-terminated prepolymers, wherein triethyleneglycol dimethacrylate (TEGDMA) was used as inert diluent, followed by end-capping reaction with 2-hydroxyethyl methacrylate, wherein BHT was added as an inhibitor, or wherein the dental resin is a TMCD Resin 7 obtained by a two-step condensation reaction comprising reacting TMCD and a slight excess of TMDI or IPDI in the presence of tin 2-ethylhexanoate (T-9) catalyst under a dry air atmosphere at a temperature from 30°C to 35°C for 4 hours to form NCO-terminated prepolymers, wherein TEGDMA was used as an inert diluent, followed by end-capping reaction with 2-hydroxyethyl methacrylate, wherein BHT was added as an inhibitor.