Wilson P R, Bione H M
School of Dental Science, University of Melbourne, Vic, Australia.
J Dent. 1993 Oct;21(5):285-8. doi: 10.1016/0300-5712(93)90109-4.
Replacement of pin-retained amalgam restorations is complicated by the loss of prime pin sites and remaining pin sites posing anatomical problems. Self-threading dentine pins can be removed with an ultrasonic handpiece, and the pin site reused with a large pin. Retention of replacement pins is similar to original pins. Pin removal after experimental placement takes a considerable time (< 15 min), but pin removal from extracted pin-restored teeth is much quicker (mean of 45 s). The reuse of primary pin sites allows uncomplicated replacement of pin-retained amalgams, and is a useful clinical technique.
桩固位银汞合金修复体的替换因主要桩道的丧失以及剩余桩道存在解剖学问题而变得复杂。自攻型牙本质桩可用超声手机取出，桩道可使用大一号的桩重新利用。替换桩的固位与原桩相似。实验性放置后取出桩需要相当长的时间（<15分钟），但从拔除的桩修复牙上取出桩则快得多（平均45秒）。原桩道的重新利用可使桩固位银汞合金的替换操作简便，是一项实用的临床技术。
