Where is the most anterior point of the tibia located and what is its significance?

• A. Location: most posterior tibial condyle; Significance: aligns the posterior of the implant.
• B. Location: most anterior point of the tibial condyle; Significance: aligns the anterior of the implant during planning stages.
• C. Location: tidemark; Significance: planning depth.
• D. Location: tibial plateau center; Significance: evaluation.

Answer: (B)

In planning a tibial implant, the reference point chosen should be a reliable, reproducible landmark on the proximal tibia. The most anterior point of the tibial condyle serves this purpose because it defines the forward edge of the tibial plateau. Aligning the implant’s anterior edge to this point helps ensure the front of the prosthesis sits flush with the anterior cortex, reducing the risk of anterior overhang or notch­ing and guiding proper orientation during planning. The posterior tibial condyle lies at the back and isn’t used for anterior alignment; the tidemark marks cartilage depth rather than a planning reference; and the tibial plateau center is useful for evaluating overall position but not specifically for aligning the implant’s anterior edge.