What types of spacers are used in hip joint endoprosthesis?

In hip joint endoprosthesis, various types of spacers are used to provide stability and alignment to the prosthetic implant. One common type of spacer is the cement spacer, which is made from bone cement and is used to fill the space between the implant and the surrounding bone. Cement spacers help in distributing loads and preventing stress shielding. Another type is the modular spacer, which consists of two separate components that can be assembled to fit the specific anatomy of the patient. These spacers allow for adjustment and alignment during the surgery. Additionally, some hip joints may use metal-on-metal or ceramic-on-ceramic spacers, which provide durability and reduce wear on the prosthetic components. The choice of spacer depends on factors such as patient characteristics, surgeon preference, and the specific type of hip joint endoprosthesis being used.

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