What characteristic describes teeth that are displaced from their normal relation to the dental arch?

Teeth that are displaced from their normal relation to the dental arch are described as malaligned. This term refers to the positioning of the teeth being out of their ideal or natural alignment, which can affect both aesthetics and functionality. Malalignment can occur due to various factors, including overcrowding, genetic factors, or dental trauma.

Other options do not accurately capture this specific characteristic: "isolated" generally refers to teeth that are separated from others rather than misaligned, "exposed" typically means a tooth is visible above the gum line or has part of its structure visible due to gum recession or trauma, while "inverted" would imply a tooth is turned upside down, which is a more extreme condition rather than general misalignment. Hence, malaligned is the appropriate term for teeth that do not fit properly within the dental arch.