Two vs Four Implants with Locator Attachments Supporting Mandibular Overdentures: a Five-year Clinical Trial
ZUO Chen-qi, WEI Li-ping, HUANG Na, ZHANG Li-li, WANG Yuan-qin
《Journal of Oral and Maxillofacial Surgery》 . 2016, (4): 274 -276 .  DOI: 10.3969/j.issn.1005-4979.2016.04.008