Lazzati M, Macchi A, Vaj L
Ospedale Multizonale di Varese.
Mondo Ortod. 1990 Mar-Apr;15(2):201-4.
Retention is a problem which has acquired a growing importance in orthodontic therapy. Some studies infact have proved that relapse cases may happen frequently at the end of an orthodontic treatment. To prevent these relapses it's necessary a suitable period of retention. In this work we took into consideration the problem of lower incisors crowding and we proposed a method of retention with the application of a fixed maintainer from cuspid to cuspid. This maintainer is applicated with some contrivances to reduce the risk of maintainer removal.
保持是正畸治疗中一个日益重要的问题。事实上，一些研究已经证明，正畸治疗结束后复发情况可能经常发生。为了防止这些复发，需要一段合适的保持期。在这项工作中，我们考虑了下切牙拥挤的问题，并提出了一种从尖牙到尖牙应用固定保持器的保持方法。这种保持器通过一些装置来应用，以降低保持器脱落的风险。
