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Strength and Chemical Stability due to Aging of Two Bone Void Filler Materials

机译：两种骨空隙填料的老化导致的强度和化学稳定性

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摘要

Injectable resorbable bone cements for bone void fillings are gaining in interest. The materials resorb in vivo with loss of void filling capacity and strength as a consequence. The objective with this study is to qualitative determining the dissolution behaviour for a calcium sulphate and a calcium phosphate cement as function of storage time in different storage medium and correlate to their strength development. Experiments were performed on a calcium phosphate based cement, Norian SRS, and a calcium sulphate based cement, MUG X3. In the resorbtion study, the materials dissolution at different pH (3, 5 and 7) was compared over a period of 11 weeks. The materials compressive and biaxial flexural strength was measured after aging in phosphate buffer saline for up to 12 weeks. The proposed qualitative method to study dissolution behaviour of injectable biomaterials as function of time and medium were evaluated and proved to be useful. Both materials were dissolved after 3 weeks of storage in pH 3. MUG X3 dissolved faster than Norian SRS at pH 5. At pH 7 both materials were stable over the test period of 11 weeks. For both materials the strength decreases with storage time. Norian had a higher compressive strength than MUG X3 for the first week, after the first week the compressive strength was similar for the two materials. MUG X3 showed a higher flexural strength than Norian during the full test period.
机译：用于骨空隙填充的可注射的可吸收的骨水泥正在引起人们的兴趣。该材料在体内吸收，结果导致空隙填充能力和强度丧失。这项研究的目的是定性确定硫酸钙和磷酸钙水泥在不同存储介质中的存储时间的函数，并与它们的强度发展相关。实验是在磷酸钙基水泥Norian SRS和硫酸钙基水泥MUG X3上进行的。在再吸收研究中，在11周内比较了在不同pH（3、5和7）下材料的溶出度。在磷酸盐缓冲液中老化12周后测量材料的抗压强度和双轴弯曲强度。所提出的定性方法用于研究可注射生物材料随时间和介质的溶解行为，并得到了验证。在pH 3下保存3周后，两种材料均溶解。在pH 5下，MUG X3的溶解速度比Norian SRS快。在pH 7下，两种材料在11周的测试期内均保持稳定。对于这两种材料，强度均随存储时间而降低。在第一周，Norian的抗压强度高于MUG X3，在第一周后，两种材料的抗压强度相似。在整个测试期间，MUG X3的弯曲强度均高于Norian。

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