Berger Lara, Matta Ragai-Edward, Weiß Christian Markus, Adler Werner, Wichmann Manfred, Zorzin José Ignacio
Department of Prosthodontics, University Hospital Erlangen, Glückstrasse 11, 91054 Erlangen, Germany.
Institute of Medical Informatics, Biometry and Epidemiology (IMBE) of the Friedrich-Alexander-University, Erlangen-Nuremberg, Waldstrasse 6, 91054 Erlangen, Germany.
Materials (Basel). 2024 May 1;17(9):2130. doi: 10.3390/ma17092130.
The marginal accuracy of fit between prosthetic restorations and abutment teeth represents an essential aspect with regard to long-term clinical success. Since the final gap is also influenced by the luting techniques and materials applied, this study analyzed the accuracy of the fit of single-tooth zirconia copings before and after cementation using different luting materials. Forty plaster dies with a corresponding zirconia coping were manufactured based on a single tooth chamfer preparation. The copings were luted on the plaster dies ( = 10 per luting material) with a zinc phosphate (A), glass-ionomer (B), self-adhesive resin (C), or resin-modified glass-ionomer cement (D). The accuracy of fit for each coping was assessed using a non-destructive digital method. Intragroup statistical analysis was conducted using Wilcoxon signed rank tests and intergroup analysis by Kruskal-Wallis and Mann-Whitney U tests (α = 0.05). Accuracy of fit was significantly different before/after cementation within A (0.033/0.110 µm) and B (0.035/0.118 µm; = 0.002). A had a significantly increased marginal gap compared to C and D, and B compared to C and D ( ≤ 0.001). Significantly increased vertical discrepancies between A and B versus C and D ( < 0.001) were assessed. Of the materials under investigation, the zinc phosphate cement led to increased vertical marginal discrepancies, whereas the self-adhesive resin cement did not influence the restoration fit.
修复体与基牙之间的边缘适合性精度是长期临床成功的一个重要方面。由于最终间隙也受粘结技术和所用材料的影响，本研究分析了使用不同粘结材料粘结前后单颗牙氧化锆全冠的适合性精度。基于单颗牙的肩台预备制作了40个带有相应氧化锆全冠的石膏模型。使用磷酸锌水门汀（A）、玻璃离子水门汀（B）、自粘结树脂水门汀（C）或树脂改性玻璃离子水门汀（D）将全冠粘结在石膏模型上（每种粘结材料10个）。使用无损数字方法评估每个全冠的适合性精度。组内统计分析采用Wilcoxon符号秩检验，组间分析采用Kruskal-Wallis检验和Mann-Whitney U检验（α = 0.05）。A组（0.033/0.110 µm）和B组（0.035/0.118 µm；P = 0.002）粘结前后的适合性精度有显著差异。与C组和D组相比，A组的边缘间隙显著增加，B组与C组和D组相比也是如此（P≤0.001）。评估发现A组和B组与C组和D组之间的垂直差异显著增加（P<0.001）。在所研究的材料中，磷酸锌水门汀导致垂直边缘差异增加，而自粘结树脂水门汀不影响修复体的适合性。
