The center of resistance of a tooth is the point where a single force results in pure translation without rotation. It is located approximately at the midpoint of the embedded portion of the root because this is where the tooth’s supporting structures, including the periodontal ligament and alveolar bone, provide optimal resistance. Forces applied at this point produce controlled tooth movement crucial in orthodontics and prosthodontics. Understanding this location helps in planning effective force application for tooth movement or stabilization during surgical procedures.

Reference: Contemporary Orthodontics, 6th Edition.