Outcomes of Cementless-Backed Patellar Components.

Area of Science:

• Orthopedic Surgery
• Biomaterials Engineering
• Clinical Outcomes Research

Background:

• Early positive outcomes with cementless fixation in total knee arthroplasty (TKA) necessitate long-term efficacy evaluations.
• Limited data exists specifically on patellar component outcomes in cementless TKA.

Purpose of the Study:

• To evaluate implant survivorship, complications, and radiographic outcomes in a large cohort undergoing cementless TKA.
• To specifically assess the safety and efficacy of cementless patellar component fixation.

Main Methods:

• A retrospective review of 261 patients who underwent cementless TKA by a single surgeon.
• All patients received identical cementless tibial, femoral, and patellar components.
• Follow-up averaged 4.5 years, assessing complications and radiographic changes.

Main Results:

• Overall implant survivorship was 98% at a mean of 4.5 years.
• A single case of patellar aseptic loosening (0.3%) occurred, successfully revised.
• Other patellar complications included one tendon rupture and one patella fracture, both managed successfully.

Conclusions:

• Cementless fixation demonstrates high implant survivorship and a favorable safety profile in TKA.
• Patellar fixation using cementless components is a safe and effective technique in total knee arthroplasty.
• Radiographic outcomes were excellent, with no signs of progressive radiolucencies or subsidence.