Which term refers to teeth that are not in their proper position within the dental arch?

The term that refers to teeth that are not in their proper position within the dental arch is "malaligned." This word is used to describe teeth that are misaligned or irregularly positioned, which can affect both aesthetics and functionality, such as biting and chewing. Malalignment can lead to various dental issues, including uneven wear on teeth, difficulty in cleaning certain areas, and potential jaw problems.

In contrast, the term "exposed" typically relates to teeth or tissue being visible inappropriately or not adequately protected, "inverted" usually refers to an object that is turned upside down, and "augmented" often means increased or enhanced, but does not specifically pertain to the positioning of teeth. Thus, malaligned is the most appropriate term for describing improperly positioned teeth within the dental arch.