Related Experiment Video
Updated: Feb 2, 2026

Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty
Published on: February 27, 2018
Intramedullary versus extramedullary alignment guides on total knee arthroplasty: a meta-analysis
Ya-Fei Qin1, Na Li1, Yong-Xin Shi2,3
1Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin 300052, PR China.
Aim:
A meta-analysis concentrated on the effect of intramedullary and extramedullary systems on total knee arthroplasty.
Method:
Potential academic articles were identified from Cochrane Library, Medline, PubMed, Embase, ScienceDirect, CNKI, WanFang, VIP and other databases. The STATA version was used to analyze the pooled data.
Results:
There are obvious significant differences in drainage volume and transfusion rate. There was no significant difference in lower limb coronal alignment, coronal and sagittal alignment of the femoral component, operation time, postoperative knee score and complications.
Conclusion:
Our meta-analysis shows that the alignment of the extramedullary distal femur osteotomy is as accurate as intramedullary systems. Furthermore, extramedullary distal femur osteotomy without invading the femoral medullary cavity could reduce postoperative bleeding and the transfusion rate. Furthermore, research is required to test the robustness of our findings when more data is available and by undertaking both Bayesian and frequentist methods. When more data are available, the heterogeneity can be further explored through sensitivity analysis, and the available data can be combined to verify the hypothesis.
Related Concept Videos
Knee Joint
A total of seven ligaments support the knee joint. The patellar ligament, which is also attached to the quadriceps femoris...
Directing Effect of Substituents: meta-Directing Groups
Design Example: Alignment of a Road Line Using GIS
Total Voids in Concrete
Impression Management Techniques III: Aligning Actions
meta-Directing Deactivators: –NO2, –CN, –CHO, –⁠CO2R, –COR, –CO2H

