Density plots showing the effect of smoothing on DNE, OPCR, RFI, PCV, surface area (SA), and tooth size.

A negative value indicates a decrease in the topographic value due to smoothing. Grey, solid lines are low triangle counts (< 210 triangles), dashed grey is medium-low triangle counts (210–1799 triangles), dashed black lines are medium-high triangle counts (1800–9999 triangles), and solid black lines are high triangle counts (10000+ triangles). For RFI, PCV, SA, and size, as triangle count increases, the effects of smoothing become more predictable, as is evidenced by the narrowing of the density distributions. DNE and OPCR are more sensitive to smoothing than the other metrics.