Which location of margin is least visible?

The most discreet location for the margin in dental prosthetics is the distal area. The distal margin, which is situated towards the back of the mouth, typically receives less visibility compared to other locations when a patient smiles or talks. This is primarily due to the natural position and movement of the jaw and tongue during typical oral functions.

In contrast, the mesial margin, positioned towards the front of the mouth, is more easily seen. The buccal surface, facing the cheeks, is also visible during conversation and eating. Additionally, the lingual margin, which is located on the tongue side of the teeth, can be observed, especially when individuals open their mouths wide or during certain movements. Therefore, the distal margin is favored for its ability to blend more seamlessly with the surrounding dentition, making it less visible and thus more aesthetically pleasing in many dental restorations.