The portion of the surface of an object that is below the height of contourin relationship to the path of placement.
The contour of a cross‐sectional portion of a residual ridge or dental arch that prevents the insertion of a dental prosthesis.
Any irregularity in the wall of a prepared tooth that prevents the withdrawal or seating of a wax pattern or casting.
A condition of having overhanging tissue as could be the case in preparing a dental cavity for restoration. Undercutting helps to keep the filling material in place.
