Fracture of a cemented modern titanium alloy tibia baseplate: a case report

Abstract

This case highlights a fracture of a modern tibia basetray. The patient is a 52-yearold female who underwent a total knee arthroplasty that had catastrophic posterior medial polyethylene wear 5-years following the original surgery. She underwent a polyethylene exchange to an anterior constrained style polyethylene and a year and a half later presented with severe medial pain and a locked knee. Radiographs initially demonstrated significant anterior translation of the tibia on the femur and she was indicated for revision surgery. Radiographs the day prior to revision demonstrate a fractured posterior medial corner of the base tray and a disengaged polyethylene in the suprapatellar pouch. Revision TKA was undertaken and given the inability to control AP translation with a none or semi constrained knee design, reconstruction with a rotating hinge knee was performed.

Catastrophic Failure of the Tibial Component After Total Knee Arthroplasty: Fracture and Dissociation Between the Baseplate and Stem

“…Eccentric joint contact forces seen in malalignment are further amplified in the setting of an elevated BMI, as any varus deviation of the tibial component from being perpendicular to the mechanical axis of the tibia increases the risk of tibial component failure [ 3 ]. Obesity has been described as a separate risk factor for aseptic loosening, varus collapse, and baseplate failure even without the presence of malalignment [ 5 ]. Abdel et al.…”

“…Abdel et al. reported the incidence of aseptic loosening in TKA patients with BMI ≥ 35 kg/m 2 to be nearly double that of those with BMI < 35 kg/m 2 , independent of the coronal alignment of the components [ 5 ].…”

Development of patient-specific 3D printed implants for total knee arthroplasty

“…TKA achieves a patient satisfaction rate of 75% to 89%, and about 50% of patients experience postoperative functional limitations and infections. Causes of extra-articular wear are found to be micro-motion between the TKR tibial bearing and the metal base plate (reverse wear) as well as impulse of the ultra-high-molecular-weight polyethylene (UHMWPE) bearing against raw cement or hip and knee osteophytes [10].…”