Assessment of the accuracy of patient-specific drilling guides for cervical (C5-C6) and lumbar (L4-L5) vertebrae in cats.

Ten sets of vertebral biomodels and the corresponding drilling guides were created to evaluate the implantation accuracy in the cervical (C5-C6) and lumbar (L4-L5) vertebrae of cats. Smooth pins were implanted using the guides on the right side of five randomly assigned biomodel sets and on the left side of the remaining sets, with the contralateral side undergoing freehand implantation. Subsequently, a new tomographic study was conducted to measure the implantation angles.