Digital lingual orthodontics and temporary anchorage devices for efficient biomechanics

Abstract

IntRoductIon One of the major challenges in orthodontics is to achieve an excellent result with appliances that are both esthetic and comfortable. There is currently enormous interest in so-called "invisible orthodontics." The increasing demand for an esthetic appearance among adult orthodontic patients, even during orthodontic treatment period, has led to the advent of invisible orthodontic treatment. Tooth-colored brackets and archwires, clear aligner therapy, and lingual orthodontic treatment are the invisible way of treating the malocclusion so far available. However, these brackets and archwires are invisible from a certain distance only. Furthermore, the clear aligners are not purely invisible as it is a transparent sheet closely adapted to the teeth. The lingual orthodontic appliances are, in a true sense, the only invisible appliance system available. [1] The art and science of lingual orthodontics depends on choice of bracket system, laboratory procedure, wire form, and mechanics during initial leveling/aligning and retraction.

Evaluation of the stress generation on the cortical bone and the palatal micro-implant complex during the implant-supported en masse retraction in lingual orthodontic technique using the FEM: Original research

“…Over time, the technique itself has become simple with the advent of computerized planning, improved indirect lingual bracket bonding systems and the newer archwires. 1 In comparison to the labial orthodontics, the tooth movement is more comfortable in lingual orthodontics as the forces are closer to the center of resistance of the teeth. 2 However, the vertical bowing effect and the torque loss of the anteriors should be minimized by keeping the retraction force low.…”

“…It is generally agreed that the lingual orthodontics has the biomechanical advantage of providing greater anchorage stability than the conventional labial appliances. 1 Nevertheless, the use of micro-implants in the lingual orthodontic technique has been advocated to control the anterior torque loss, to bring about the bodily tooth movements and to bring about the intrusion of the anteriors. 5 Moreover, the paramedian zone of the palate is the most popular site for the placement of micro-implants owing to the low supply of blood vessels and nerves, thus ensuring the least damage to the underlying structures.…”