桩冠修复最严重的并发症为根折和桩钉折断无法取出，导致修复彻底失败。预成合金桩弹性模量大于牙本质会在牙根?粘结剂?桩界面产生应力，从而引起修复体失败的可能。纤维桩系统的出现，解决了这些问题，它易于从根管内拆取[6]。因此，玻璃纤维桩是一种更好的桩核修复体。
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