Nontraumatic fracture of the polyethylene tibial post in a bi-cruciate stabilized total knee prosthesis

Tibial post fracture in total knee arthroplasty is a rare but disabling complication. The authors report a case of a nontraumatic fracture of the polyethylene tibial post in a patient with a bi-cruciate stabilized Journey total knee arthroplasty system with subsequent episodes of knee subluxation. Early revision is required to resolve this particular problem.