Rismanchian Mansoor, Hatami Mahnaz, Badrian Hamid, Khalighinejad Navid, Goroohi Hossein
Dental Implant Research Center, Department of Prosthodontics, Dental School, Isfahan University of Medical Sciences, Isfahan, Iran.
J Oral Implantol. 2012 Dec;38(6):677-85. doi: 10.1563/AAID-JOI-D-11-00167. Epub 2011 Nov 2.
A microgap between implant and abutment can lead to mechanical and biological problems such as abutment screw fracture and peri-implantitis. The aim of this study was to evaluate microgap size and microbial leakage in the connection area of 4 different abutments to ITI implants. In this experimental study, 36 abutments in 4 groups (including Cast On, Castable, Solid, and Synocta abutments) connected to Straumann fixtures (with their inner part inoculated with bacterial suspension) and microbial leakage were assessed at different times. The size of the microgap in 4 randomized locations was then measured by scanning electron microscope. The data were analyzed by SPSS software and by 1-way variance statistical test, Kruskal-Wallis, and their supplementary tests (Mann-Whitney HSD and Tukey's; α = .05) at the next step. The effect of using different types of abutments was significant on the mean microgap size (P < .001) and on the mean number of leaked colonies (CFU/mL) through the connection area of the implant and abutment within the first 5 hours of the experiment (P = .012); however, it did not significantly influence microleakage at 24 hours, 48 hours, and 14 days (P = .145). Using Synocta abutments compared with Solid abutments will not provide us with more accommodation, and vice versa. Using Solid and Synocta abutments can significantly decrease the microgap size; however, Cast On abutments do not show a significant difference in terms of microgap compared with Castable abutments. Microleakage in the connection area is comparable for these 4 abutments.
种植体与基台之间的微小间隙会导致机械和生物学问题，如基台螺丝断裂和种植体周围炎。本研究的目的是评估4种不同基台与ITI种植体连接区域的微小间隙大小和微生物渗漏情况。在这项实验研究中，将4组（包括铸造一体式、可铸造式、实心式和Synocta基台）的36个基台连接到Straumann种植体（其内部接种细菌悬液），并在不同时间评估微生物渗漏情况。然后通过扫描电子显微镜测量4个随机位置的微小间隙大小。数据通过SPSS软件进行分析，并在下一步通过单向方差统计检验、Kruskal-Wallis检验及其补充检验（Mann-Whitney HSD和Tukey检验；α = 0.05）进行分析。在实验的前5小时内，使用不同类型基台对平均微小间隙大小（P < 0.001）和通过种植体与基台连接区域渗漏的菌落平均数（CFU/mL）有显著影响（P = 0.012）；然而，在24小时、48小时和14天时，对微渗漏没有显著影响（P = 0.145）。与实心基台相比，使用Synocta基台不会为我们提供更多的容纳空间，反之亦然。使用实心基台和Synocta基台可显著减小微小间隙大小；然而，铸造一体式基台与可铸造式基台在微小间隙方面没有显著差异。这4种基台在连接区域的微渗漏情况相当。
