Korsch Michael, Walther Winfried
Quintessence Int. 2015 Jul-Aug;46(7):583-9. doi: 10.3290/j.qi.a34077.
The cementation of fixed dental prostheses (FDPs) on implants involves the risk of undetected excess cement. If a zinc oxide-eugenol cement (ZEC) is used as the luting material, this risk appears to be lower, as the excess cement will dissolve in the peri-implant sulcus. However, using a ZEC on a general basis conflicts with the manufacturers' classification of a ZEC as a temporary luting material. To evaluate the clinical safety of ZECs, the present study investigated whether more ZECretained reconstructions than screw-retained reconstructions loosen over time.
In a retrospective observational study, the frequency of FDP loosening was investigated. For this purpose, data from patients who had been fitted with FDPs on two or more than two posterior implants were investigated. The study compared screw-retained (n = 59) vs cement-retained (n = 40) FDPs on implants over an observation period of 3.5 years after reconstruction incorporation. All cement-retained FDPs had been cemented with a temporary ZEC.
The prevalence of reconstruction loosening was significantly lower for cement-retained FDPs when a ZEC (10%) was used than it was for screw-retained FDPs (29%); four screw-retained FDPs and one cementretained FDP developed major complications. The survival rate of the reconstructions within the observation period was 97% for screw-retained FDPs and 100% for cement-retained FDPs (not significant).
The prevalence of cementretained FDP loosening was significantly lower than that of screw-retained FDPs. Cementing FDPs on implants using a temporary cement does not necessarily lead to a higher number of loosened reconstructions. Permanent cementation with ZEC appears to be justified.
在种植体上粘结固定义齿（FDPs）存在未被发现的多余粘固剂的风险。如果使用氧化锌丁香酚水门汀（ZEC）作为粘结材料，这种风险似乎较低，因为多余的粘固剂会溶解在种植体周围龈沟中。然而，普遍使用ZEC与制造商将ZEC归类为临时粘结材料相冲突。为了评估ZEC的临床安全性，本研究调查了随着时间推移，粘结式ZEC修复体是否比螺丝固位修复体松动得更多。
在一项回顾性观察研究中，调查了FDP松动的频率。为此，研究了在两个或两个以上后牙种植体上安装FDP的患者的数据。该研究比较了重建纳入后3.5年观察期内种植体上螺丝固位（n = 59）与粘结固位（n = 40）的FDP。所有粘结固位的FDP均使用临时ZEC进行粘结。
使用ZEC（10%）时，粘结固位FDP的修复体松动发生率显著低于螺丝固位FDP（29%）；四个螺丝固位FDP和一个粘结固位FDP出现了严重并发症。观察期内，螺丝固位FDP的修复体存活率为97%，粘结固位FDP为100%（无显著差异）。
粘结固位FDP的松动发生率显著低于螺丝固位FDP。使用临时粘固剂在种植体上粘结FDP不一定会导致更多的修复体松动。用ZEC进行永久粘结似乎是合理的。
