| 摘要 |
The device has a female rod (2) comprising a cavity (5), and connected to a bony portion. A male rod (1) is articulated in the cavity and connected to another bony portion. The male rod includes a lateral articulation surface (13) coacting with a lateral surface of the cavity to guide inclination movements of the male rod relative to the female rod. Resilient rings e.g. Belleville rings, are arranged to exert an action countering the inclination movements. The resilient rings are disposed in an interior recess (10) of the male rod. |
