Cruciate allograft is a reconstruction of the cruciate ligament using material from another person (ie donor tendon).
The use of allograft for the first procedure to reconstruct a torn cruciate ligament is a bit controversial. Most surgeons nowadays would tend to use an autograft, although an allograft might be the first choice for a second or third procedure if there are no more tendons available to harvest.
Is cruciate allograft safe?
Although transmission of infection is a risk with any allograft, most are purchased from accredited tissue banks which adhere to stringent regulation although standards might vary from country to country. The tissue is harvested from a donor, and processed to make it safe and able to be stored. Very occasionally an allograft might be taken from a family member, such as a parent for a child, and in this case there is no tissue bank involved.
Allograft Use in Anterior Cruciate Ligament Reconstruction. Jost PW, Dy CJ, Robertson CM and Kelly AM. HSS J. 2011 Oct; 7(3): 251–256.
A Systematic Review of Failed Anterior Cruciate Ligament Reconstruction With Autograft Compared With Allograft in Young Patients Wasserstein D, Sheth U, Cabrera A and Spindler, KP. Sports Health. 2015 May; 7(3): 207–216.