The Trident® Ceramic Acetabular System
An artificial hip replacement device that features a new, state-of-the-art ceramic-on-ceramic
The artificial hip replacement device consists of four basic components: an alumina ceramic insert (socket liner), an alumina ceramic femoral head (ball), a metal acetabular shell (socket), and a metal femoral stem (hip stem).
The hip stem is inserted into the top of the thigh bone. The ball fits onto the top of the hip stem. The socket liner and mating socket are fixed to the hip joint. The ball and socket articulate together.
The Trident® implant has bearing surfaces (the ball and socket) made of alumina ceramic. Laboratory testing of alumina ceramic has shown it to have less wear than the metal and plastic materials that are currently used in total hip surgery. Alumina ceramic is extremely hard -- in fact, its hardness is second only to diamond -- and provides excellent lubrication between the ball and socket. Because of its material characteristics, alumina ceramic-on-ceramic demonstrates significantly lower wear versus conventional metal-on-plastic components in laboratory testing. Therefore, it is anticipated that these improved wear characteristics will extend the life of the implants.
Purpose of the Device
This total hip replacement is indicated for patients with painful, disabling hip joint disease caused by a severe form of arthritis. This total hip replacement should not be used for patients:
- Who may have an infection in or near the hip joint
- Who are unable to comply with the instructions for preparing for and recovering from the surgery
- Who do not have enough healthy bone to support fixation of the implants
- Whose bones are not fully grown