Passive use of Lingual Arch and Transpalatal Arch - Lingual arch (LLA) maintains molar position in cases of lower teeth space maintenance. - LLA and Transpalatal arch (TPA) stabilize molar position to avoid side effects during orthodontic therapy. - LLA prevents migration of permanent molars in cases of early loss of deciduous molars. - LLA blocks off eruption space for premolar teeth in cases of early loss of deciduous molars. - LLA maintains Leeway space in the arch after exfoliation of deciduous molars. - TPA can be used as an adjunct for anchorage in extraction treatment. - Studies show negligible difference between patients who received TPA and those who didn't. - TPA cannot provide absolute anchorage to prevent mesial movement of posterior molars. - TPA is effective in cases of palatally displaced canine teeth without requiring expansion. - TPA prevents buccal tipping of molars in Burstone-type Segmental Arch mechanics.

Active use of Lingual Arch and Transpalatal Arch - LLA and TPA can be activated to obtain molar movements in all planes of space. - LLA and TPA are frequently activated to expand or reduce intermolar distance and rotate molars. - TPA can be activated to maintain molar position in open bite cases with TADs for intrusion. - LLA and TPA archwires are usually made of stainless steel for passive use. - Beta-titanium wire is more effective for activating LLA or TPA for molar displacement.

Studies and Research - Brennan and Gianelly (2000) used lingual arch in mixed dentition to resolve incisor crowding. - Zablocki et al. (2008) studied the effect of TPA during extraction treatment. - Baccetti et al. (2011) conducted an RCT on treatment of palatally displaced canines with RME and/or TPA. - Fiorelli and Melsen (1995-2018) discuss the biomechanics of lingual arches. - Tsetsilas et al. (2015) analyzed symmetric and asymmetric expansion of molars using Burstone-type TPA.

Other uses of Transpalatal Arch - TPA can be used to prevent premolar space closure in cases of molar movement as a group. - TPA is used to prevent buccal tipping of molars in Burstone-type Segmental Arch mechanics. - TPA is used in cases of open bite to maintain molar position during TAD-assisted intrusion. - LLA and TPA archwires are typically made of stainless steel for passive use. - Beta-titanium wire is more effective for activating LLA or TPA for molar displacement.

General Information - Lingual arch and Transpalatal arch can be used for passive or active purposes. - Lingual arches are used to maintain molar position, prevent migration, and block off eruption space. - Transpalatal arches are used for anchorage, stabilization, and prevention of buccal tipping. - Stainless steel archwires are commonly used for passive use, while beta-titanium wire is preferred for activation. - Various studies and research have been conducted on the effectiveness and biomechanics of lingual and transpalatal arches.