Vafaee Fariborz, Nikanjam Saeed, Farahnaki Arash, Mahabadi Meysam, Farashi Sajjad, Khazaei Sara, Shahabi Shiva
Dental Implants Research Center, Avicenna Institute of Clinical Sciences, Avicenna Health Research Institute, Hamadan University of Medical Sciences, Hamadan, Iran.
Department of Prosthodontics, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran.
J Adv Periodontol Implant Dent. 2025 Apr 21;17(2):65-70. doi: 10.34172/japid.025.2292. eCollection 2025 Jun.
Excess cement is one of the most prevalent problems with cement-retained implant-supported prostheses. The excess cement may be considered an important source of inflammation during implant application. Optimizing the design procedure for reducing excess cement is necessary for successful and safe implant applications.
This study assessed the effect of two confounding factors, i.e., emergence profile and space gap size, on the level of excess cement. Three types of emergence profiles (concave, convex, and straight) and three different gap sizes (30, 60, and 90 µm) were considered for implant design, and the level of excess cement was measured for each design.
Statistical analyses using one-way ANOVA followed by post hoc value correction revealed that the best emergence profile with the lowest excess cement was the straight profile, with statistically lower excess cement compared with concave and convex profiles (<0.05) and no significant difference between concave and convex profiles. Furthermore, analyses showed that lower gap size was associated with lower excess cement, even though increasing the gap size from a threshold (>60 µm) made the difference significant. Interaction analysis using two-way ANOVA also indicated the interaction between the emergence profile and space gap size.
The results emphasized that a straight profile with a smaller gap size should be considered to reduce the excess cement. However, due to the small sample size of the study, further analyses with different types of materials, angles of deformation, and gap sizes are required to reveal the exact relationship between excess cement and the design specifications.
多余的骨水泥是种植体支持的骨水泥固位假体最常见的问题之一。多余的骨水泥可能被认为是种植体植入过程中炎症的重要来源。优化设计程序以减少多余的骨水泥对于成功且安全的种植体植入是必要的。
本研究评估了两个混杂因素，即种植体颈部外形和间隙大小，对多余骨水泥量的影响。种植体设计考虑了三种类型的种植体颈部外形（凹形、凸形和直形）和三种不同的间隙大小（30、60和90微米），并对每种设计测量多余骨水泥的量。
使用单因素方差分析并随后进行事后检验值校正的统计分析表明，多余骨水泥量最低的最佳种植体颈部外形是直形，与凹形和凸形相比，多余骨水泥量在统计学上更低（<0.05），凹形和凸形之间无显著差异。此外，分析表明间隙尺寸越小，多余骨水泥量越低，尽管从阈值（>60微米）增加间隙尺寸会使差异显著。使用双因素方差分析的交互分析也表明了种植体颈部外形和间隙大小之间的相互作用。
结果强调，应考虑采用间隙尺寸较小的直形种植体颈部外形以减少多余的骨水泥。然而，由于本研究样本量较小，需要用不同类型的材料、变形角度和间隙尺寸进行进一步分析，以揭示多余骨水泥与设计规格之间的确切关系。
