This describes the compositions of dental bonding used for adhering dental Biomaterials for Hard Tissue comprising a combination of one or more Polymerizable compounds recently synthesized Stable, Low shrinkage, and multifunctionalWhere the compounds are derived acidic - Methacrylates with excellent adhesion to Tooth substance (hard Enamel or Dentin) dental restoratives, and in marginal Sealing Quality between the tooth and the material adhered, and I Improved storage stability.Claim 1: a compound selected from the group consisting of: (i) a compound with the formula (1), where the Ring structure of the formula (1) is saturated or unsaturations and contains up to Three: - Where Y1 Y6, each independently selected from the group consisting of: C O, N and S,,Under the condition that at least three of Y1 Y6 are C - and where: (i) when any - between Y1 Y6 is o, s or unsaturated Nitrogen, then the corresponding H X1, X6 and Z1 - Z6 are absent； (ii) When either Y1 Y6 is a nitrogen - or unsaturated a carbon unsaturated, ENT Take the corresponding H are absent； X6 X1, each independently of the other,Is a direct link or selected from the group consisting of: = OR = = N - S, and when any of RX, where X1 = = - X6 is o or s, then the corresponding Z1 - Z6 are Absent, where RX is a C1 - 15 Group, optionally having at least one unsaturation a Branching and / or a Cycle, and Up to 4 times are replaced or not replaced and can be interrupted with at least a o or s,Where the substituents are selected, each independently from the group consisting of - Oh, - Orv, = OR = S - o2crv, - SH, - - socrv SRV, nhrv, - NH2, - n, - 2, - nhcorv (RV), nrcorv -, I -, BR -, - CL, - f, - CN, - - CO2H, co2rv, Cho, corv CONH2 -, -, - conhrv (RV), - 2, - - cosrv COSH, NO2 -, -, - and - SO3H, sorv so2rv Where that RV is a linear, branched or cyclic alkyl, with one to ten carbon Atoms； Z1 - Z6,Each independently is RS, where RS is selected from the group consisting of: (a) h； (b) a radical with the formula
