Mousa Mohammed Assayed, Alshubrmi Hasna, Issrani Rakhi, Alzarea Bader Kureyem
Department Prosthetic Dental Sciences, College of Dentistry, Jouf University, Jouf, Saudia Arabia.
Department of Prosthodontics, Hail Dental Center, Ministry of Health, Hail, Saudia Arabia.
J Adv Prosthodont. 2024 Dec;16(6):336-347. doi: 10.4047/jap.2024.16.6.336. Epub 2024 Dec 19.
This study assessed the microgap width and adhesion of three bacterial species in four dental implants with different interlocks under four screwing torques.
Ten samples of four implant systems with various interlockings, including full-hexagonal (FHI), cylindrical-conical trilobe-index (TLI), Morse-taper with octagon terminal index (OI), and hexagonal interlock (slip-fit) (HI-SF), were used. The abutments were screwed to the fixtures under torques of 10, 20, 30, and 40 Ncm. The microgap between the abutment and the platform was assessed using a Scanning Electron Microscope (SEM). The leakage of 3 bacteria, including Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa, was evaluated under 30 Ncm torque.
The TLI system showed the widest gap under all torques compared to others. There was no significance among all systems under different screwing torques. Regarding the leakage, there was no adherence to and and 36.4% of to the HI-SF, followed by the OI system. The FHI and TLI systems showed the highest bacterial adherence.
Even with low torque, the studied systems showed gap widths narrower than acceptable width. Implant systems with FHI and OI demonstrated misfits of less than 2 µm upon 10 Ncm and less than 1 µm when the torque increases, giving them priority to be used in areas with poor bone quality. The HI-SF demonstrated a high ability to resist the adherence to and , followed by OI. However, demonstrated a high ability to adhere to all systems.
本研究评估了在四种不同旋紧扭矩下，四种具有不同互锁结构的牙科种植体中三种细菌的微间隙宽度和粘附情况。
使用了十种样本，包括四种具有不同互锁结构的种植系统，即全六边形（FHI）、圆柱 - 圆锥三叶形指数（TLI）、带八角形末端指数的莫氏锥度（OI）和六边形互锁（滑配）（HI - SF）。基台在10、20、30和40 Ncm的扭矩下旋紧到种植体上。使用扫描电子显微镜（SEM）评估基台与平台之间的微间隙。在30 Ncm扭矩下评估三种细菌（金黄色葡萄球菌、大肠杆菌和铜绿假单胞菌）的渗漏情况。
与其他系统相比，TLI系统在所有扭矩下显示出最宽的间隙。在不同旋紧扭矩下，所有系统之间无显著差异。关于渗漏情况，金黄色葡萄球菌和大肠杆菌在HI - SF上无粘附，36.4%的铜绿假单胞菌粘附于HI - SF，其次是OI系统。FHI和TLI系统显示出最高的细菌粘附率。
即使在低扭矩下，所研究的系统显示出的间隙宽度也比可接受宽度窄。FHI和OI种植系统在10 Ncm时显示出小于2 µm的不匹配，当扭矩增加时小于1 µm，使其优先用于骨质量差的区域。HI - SF显示出对金黄色葡萄球菌和大肠杆菌的高抗粘附能力，其次是OI。然而，铜绿假单胞菌显示出对所有系统的高粘附能力。
