A lingual arch developer (350) having at least one force generator module (330) with an internal spring (338) is disclosed. A posterior wire section (356a) extends through one end of a housing (332). A stop (346) is attached to the posterior wire section (356a) and is located within this housing (332). The spring (338) is disposed within the housing (332) between this stop (346) and a collar (336) that is disposed at an opposite end of the housing (332). One end of an anterior wire (358) is mounted on the collar (336). Compression of the spring (338) during the installation of the lingual arch developer (350) on a dental arch of the patient will thereby exert forces on this dental arch and bias the posterior wire section (356a) and anterior wire section (358) apart.
