What is the difference between orthodontic palatal arch nance and tpa transverse palatal bar

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Why do people say I still look bad after wearing braces? In fact, there are many small skills in orthodontics, such as orthodontic transverse palatal rod nance tpa， If you do not understand the difference between the two, dental correction will achieve ideal results.

TPA and Nance arch are simple, effective oral devices with increased support, and have significant effects on patients with maxillary protrusion.

What is the difference between orthodontic nance and tpa? Look carefully at the difference Yao Yao said.

Function and principle of tpa transverse palatal bar

The first molars on both sides of the upper jaw are connected transversely with molar bands, usually placed behind the dental arch and above the tongue.

TPA is a commonly used method for strengthening support in the recommended extraction correction technology. Under the action of corrective force, the loss of maxillary molars' support is manifested as mesial tilt, cheek tilt, mesial torsion, and reduction of molars' width. The function of tpa transverse palatal bar is to stabilize the three-dimensional position of maxillary molars.

What is the picture of the nance bow gap maintainer like? What is the condition of the teeth?

Nance arch (palatal arch) space maintainer: it is a simple and effective support device with three-dimensional control support function, which is used to maintain the upper edentulous space. Its front should not contact the edge of the lower anterior teeth.

Nance arch is applicable to teeth with large crowding degree and small anterior tooth retraction. TPA transverse palatal bar is applicable to teeth with small crowding degree and large anterior tooth receptivity.

From the above analysis, we can see that the role of the transverse palatal bar (TPA) and the Nance arch is to disperse the reaction force acting on the molars and limit the support loss caused by the forward movement of the supporting molars.