Sun Fei, Lv Li-Tao, Cheng Wei, Zhang Jia-Le, Ba De-Chun, Song Gui-Qiu, Lin Zeng
Key Laboratory of Implant Device and Interface Science of Liaoning Province, School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China.
Materials (Basel). 2021 Sep 24;14(19):5542. doi: 10.3390/ma14195542.
Mechanical properties play a key role in the failure of dental implants. Dental implants require fatigue life testing before clinical application, but this process takes a lot of time. This study investigated the effect of various loading angles and implant lengths on the static fracture and fatigue life of dental implants. Implants with lengths of 9 mm and 11 mm were prepared. Static fracture tests and dynamic fatigue life tests were performed under three loading angles (30°, 40°, and 50°), and the level arm and bending moment were measured. After that, the fracture morphology and fracture mode of the implant were observed. The results showed that 9 mm length implants have a higher static failure load and can withstand greater bending moments, while 11 mm length implants have a longer fatigue life. In addition, as the loading angle increases, the static strength and bending moment decrease linearly, and the fatigue life shows an exponential decrease at a rate of three times. Increasing the loading angle reduces the time of the implant fatigue test, which may be an effective method to improve the efficiency of the experiment.
力学性能在牙种植体失效中起关键作用。牙种植体在临床应用前需要进行疲劳寿命测试，但这个过程耗时较长。本研究调查了不同加载角度和种植体长度对牙种植体静态断裂和疲劳寿命的影响。制备了长度为9毫米和11毫米的种植体。在三个加载角度（30°、40°和50°）下进行静态断裂试验和动态疲劳寿命试验，并测量了力臂和弯矩。之后，观察种植体的断裂形态和断裂模式。结果表明，9毫米长的种植体具有更高的静态失效载荷，能够承受更大的弯矩，而11毫米长的种植体具有更长的疲劳寿命。此外，随着加载角度的增加，静态强度和弯矩呈线性下降，疲劳寿命以三倍的速率呈指数下降。增加加载角度可缩短种植体疲劳测试时间，这可能是提高实验效率的有效方法。
