The remineralizing potential of hydroxyapatite (HA) prompted its use as a filler in dental composites. However, the compatibility between HA and organic compounds remains still insufficient, resulting in low mechanical properties. Moreover, HA is highly hydrophilic, leading to low mass stability of the composite. Polyhedral oligomeric silsesquioxanes are promising additives to dental composites; therefore, the compound from this group was used to modify the HA surface. Methacrylate-bearing silsesquioxane was synthesized and used as a modifier. Its structure was confirmed by Fourier-Transform Infrared Spectroscopy (FT-IR), Nuclear Magnetic Resonance Spectroscopy (NMR), and Mass Spectrometry (MS). HA modifications were conducted in several ways which efficiency was evaluated with FT-IR, Energy Dispersive Spectrometry (EDS), Thermogravimetric Analysis (TGA), Elemental analysis, and Scanning Electron Microscopy (SEM). Contact angle measurements also proved the wettability changes of the HA surface. All modification procedures were effective. The highest efficiency (78.6%) was obtained in the presence of the polymerization initiator and cross-linking agent at room temperature. The modified HA changed from highly hydrophilic to hydrophobic, which can be used in applications where its lower water sensitivity is required, i.e. in fillers for dental composites. The organic layered HA will bond stronger with the organic components of the composite matrix, improving therefore its mechanical properties.

羟基磷灰石 (HA) 的再矿化潜力促使其用作牙科复合材料中的填料。然而，HA与有机化合物的相容性仍然不足，导致机械性能较低。此外，HA 是高度亲水的，导致复合材料的质量稳定性低。多面体低聚倍半硅氧烷是牙科复合材料的有前途的添加剂；因此，该组的化合物用于修饰 HA 表面。合成了含甲基丙烯酸酯的倍半硅氧烷并用作改性剂。其结构已通过傅里叶变换红外光谱 (FT-IR)、核磁共振光谱 (NMR) 和质谱 (MS) 确认。HA 改性以多种方式进行，其效率通过 FT-IR、能量色散光谱 (EDS)、热重分析 (TGA)、元素分析和扫描电子显微镜 (SEM)。接触角测量也证明了 HA 表面的润湿性变化。所有修改程序均有效。在聚合引发剂和交联剂的存在下，室温下获得最高的效率 (78.6%)。改性 HA 从高度亲水变为疏水，可用于需要其较低水敏感性的应用，即牙科复合材料的填料。有机层状 HA 将与复合基质的有机成分结合得更牢固，从而提高其机械性能。所有修改程序均有效。在聚合引发剂和交联剂的存在下，室温下获得最高的效率 (78.6%)。改性 HA 从高度亲水变为疏水，可用于需要其较低水敏感性的应用，即牙科复合材料的填料。有机层状 HA 将与复合基质的有机成分结合得更牢固，从而提高其机械性能。所有修改程序均有效。在聚合引发剂和交联剂的存在下，室温下获得最高的效率 (78.6%)。改性 HA 从高度亲水变为疏水，可用于需要其较低水敏感性的应用，即牙科复合材料的填料。有机层状 HA 将与复合基质的有机成分结合得更牢固，从而提高其机械性能。