The related clinical study of fixed and removable retainers which were used longest and most widely undoubtedly has most important significance.
作为临床上使用最长、应用最广的活动与固定保持器，其相关临床研究无疑有着重要意义。
This research gives a theoretical support of application of PFM bridge fixed by telescopic crowns retainers.
本研究为套筒冠烤瓷桥在临床的应用推广奠定了理论基础。
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