Reich E
Poliklinik für Zahnerhaltung und Parodontologie, Universität Regensburg.
Dtsch Zahnarztl Z. 1991 Feb;46(2):161-4.
Esthetic restorations for class V lesions extending into root dentin often show marginal discoloration after some time. In this clinical study the long term quality of glass ionomer cement and "sandwich" restorations was compared with each other. In 19 patients 83 class V lesions with the apical margin in dentin were restored with glassionomer cement (I: Fuji II/G-C Dental; II: Ketac Fil/ESPE) or with a glass ionomer liner (III: Lining Cement/G-C Dental; IV: Ketac Bond/ESPE) and laminated with a composite. Where necessary the margins were prepared apically with a butt joint. The observation period between placement and last follow-up check varied between 18 and 44 months. Modified Ryge criteria were used for the clinical assessment of 77 restorations. Marginal quality was assessed in the SEM using replicas. 15.8% of the "sandwich" type and 5% of the glass ionomer cement restorations were lost. All restored teeth remained vital. Clinically the best marginal quality was found with a glass ionomer cement (II) whereas only two thirds of the sandwich restorations and the other glassionomer cement (I) had perfect margins. In the SEM the glassionomer cements had significantly less marginal openings than one of the sandwich restorations (III).
延伸至根部牙本质的V类洞的美学修复体在一段时间后常常会出现边缘变色。在这项临床研究中，对玻璃离子水门汀和“三明治”修复体的长期质量进行了相互比较。在19名患者中，用玻璃离子水门汀（I组：Fuji II/G-C Dental；II组：Ketac Fil/ESPE）或玻璃离子衬层（III组：Lining Cement/G-C Dental；IV组：Ketac Bond/ESPE）修复了83个位于牙本质内且边缘位于根尖的V类洞，并在其上复合一层复合树脂。必要时，边缘采用对接方式向根尖方向预备。修复体放置至最后一次随访检查的观察期为18至44个月。采用改良的Ryge标准对77个修复体进行临床评估。使用复制品在扫描电子显微镜下评估边缘质量。“三明治”型修复体中有15.8%和玻璃离子水门汀修复体中有5%失败。所有修复的牙齿均保持活力。临床上，玻璃离子水门汀（II组）的边缘质量最佳，而只有三分之二的“三明治”修复体和另一种玻璃离子水门汀（I组）边缘完美。在扫描电子显微镜下，玻璃离子水门汀的边缘缝隙明显少于一种“三明治”修复体（III组）。
