Abstract:
This study analyzes the biomechanical effects of modular augmented stems in constrained condylar knee implants using a combination of cadaveric experiments and specimen-specific computational models. The primary goal was to understand how these stems affect implant stability and load transfer within the tibia. The results showed that while experimental data had significant variability, the computational models consistently proved that stems reduce compressive strains in the proximal cancellous bone. This benefit was particularly pronounced in patients with lower bone quality, where the stem effectively transferred load distally to the stronger cortical bone. The findings highlight the importance of patient selection and appropriate implant sizing as key factors for determining the necessity and success of a stemmed implant.
