下颌第三磨牙截冠留根法的临床研究进展<a style="z-index: 2147483647; border-bottom: 0px; position: absolute; border-left: 0px; padding-bottom: 0px; margin: 0px; padding-left: 0px; width: 60px; padding-right: 0px; height: 25px; visibility: hidden; border-top: 0px; top: 0px; cursor: pointer; border-right: 0px; padding-top: 0px; left: 0px" id="bing-msbbp-search-anchor" target="