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Mailyan 1 - Appliances for the dental arch form correction

Constructions of orthodontic appliances for correction of dental arches constitute fastening elements disposed on separate teeth and/or their groups made in the form of support-retaining metal wireframes, located close to the necks of the teeth and interconnected by lingual (arches) and/or vestibular springs. (see Fig1, Fig2, Fig3)

When the heights of teeth are small, to improve the fixation of appliances, fastening elements are made with removable and non-removable components (see Fig3), wherein the latter may also be made of composite materials.

Fig.1

Fig.2

Fig.3.

f non-uniform expansion of both the individual and at the same time several segments of the dentition is required, and with the aim to intensify their sagittal-transversal movements, the number of lingual (palatal) and/ or buccal springs fixed on palatal supports and welded between segments of support-retaining wireframes of lateral teeth is increased in the design of appliances, see Fig4.

The design peculiarities of appliances for the upper jaw depend on the geometrical shape of dentoalveolar arch and palatine vault, as well as the tasks set in treatment planning for sagittal and transversal movements of the teeth. Besides arches, palatal wire clasps and wireframes with springs can serve as a base (support) for appliances, which may have various position in the oral cavity: transverse, longitudinal, transverse-longitudinal and different geometric shape: semielliptical, semi lunar, trapezoidal, asymmetric etc. ( see. Monograph, New means of orthodontic treatment 1998 /p. 50 Figure 26, p. 52 Fig. 27).

Fig.4