STUDY BETWEEN SEMI-CONSTRAINED TOTAL KNEE ARTHROPLASTY WITH OR WITHOUT INTRAMEDULLARY STEM

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering

Background:

• Severe preoperative deformities are common in patients requiring primary knee prostheses.
• TC3 Depuy Johnson prostheses are utilized for total knee arthroplasty.

Purpose of the Study:

• To conduct a comparative clinical and radiographic analysis of TC3 Depuy Johnson primary prostheses.
• To evaluate the short-term outcomes of prostheses with or without a stem.

Main Methods:

• A retrospective comparative study involving three groups: prostheses with stem, without stem, and mixed.
• Clinical evaluation focused on implant loosening, alongside radiographic assessment of alignment and range of motion.

Main Results:

• Postoperative range of motion exceeded 96.7° across all groups.
• Average postoperative femoral-tibial angle was 5-6° valgus.
• Implant loosening incidence was 0% with stem, 14.3% without stem, and 16.7% in the mixed group, with no statistically significant difference.

Conclusions:

• No significant difference in implant loosening was observed between TC3 Depuy Johnson prostheses with or without a stem in the short term.
• Both stemmed and non-stemmed prostheses achieved favorable postoperative range of motion and alignment.
• Level of Evidence: III, Retrospective Comparative Study.