Darmawati M Y, Ismarul N, Fuad Y, Fazan F
AMREC, SIRIM Bhd, Lot 34, Jalan Hi-Tech 2/3, Kulim Hi-Tech Park, 09000, Kulim.
Med J Malaysia. 2004 May;59 Suppl B:27-8.
Linear polymers have been commonly used as dental composite. However the aim of this work is to use hyperbranched polymer in an attempt to produce dental composite. The reason is because the dendritic molecules have shown low viscosity at higher molecular weight compared to the linear counterparts. Therefore, this work attempts to substitute the linear polymer with as much of hyperbranched polymer in the dental composite that would pass the required ISO 4049:1998(E) "Dentistry - Resin-based filling material". Several formulations of dental composites were used, i.e. combinations of linear-linear and linear-hyperbranched polymers for comparison. Following this, physical and mechanical characterisation were conducted based on the ISO standards such as water sorption and water solubility. Other characterisation such as polymerisation shrinkage and Vickers hardness were also evaluated. It was found that different types of resins give different physical and mechanical properties. The maximum achievable hyperbranched polymer, which passes the required ISO standard, that can be incorporated in the linear polymer to form dental composite is 43% wt.
线性聚合物一直被广泛用作牙科复合材料。然而，这项工作的目的是使用超支化聚合物来制备牙科复合材料。原因是与线性聚合物相比，树枝状分子在较高分子量时显示出低粘度。因此，这项工作试图在牙科复合材料中用尽可能多的超支化聚合物替代线性聚合物，使其符合所需的ISO 4049:1998(E)“牙科——树脂基填充材料”标准。使用了几种牙科复合材料配方，即线性-线性和线性-超支化聚合物的组合进行比较。在此之后，根据ISO标准进行了物理和力学表征，如水吸附和水溶性。还评估了其他特性，如聚合收缩率和维氏硬度。结果发现，不同类型的树脂具有不同的物理和力学性能。能够掺入线性聚合物中以形成牙科复合材料并通过所需ISO标准的超支化聚合物的最大含量为43%（重量）。
