The aim of this study was to assess the effects of thermoforming on aligner thickness and gap width in six aligner systems with the same nominal thickness.

A hybrid approach, which combines clear aligners with fixed appliance, is an efficient treatment alternative. This approach significantly reduces overall treatment time and unpredictable movements. The aim of this article is to show the application of the hybrid approach for different types of movements.

The aim of this study was to investigate and compare the gap (i.e. fit) and thickness of six aligner systems (Airnivol, ALL IN, Arc Angel, F22, Invisalign and Nuvola) using industrial computed tomography (CT).

Class III patients require early treatment in order to optimize the traditional expander effects; subsequently hybrid anchorage allowed to maximize skeletal advancement. In addition, loss of space for the erupting teeth and dento-alveolar tipping were avoided. The good results of the phase I treatment and of the active retainer meant that a complex case would become relatively simple at the phase II treatment.

This case demonstrates that hybrid application of clear aligners can be a rational and efficient approach for treating malocclusions, as compared with a clear aligner therapy alone option in which the magnitude of some movements would require a higher number of aligners and likely further refinement.

Low-frequency vibrations have been proposed as a means of accelerating tooth movement and reducing orthodontic treatment times. The aim of this study was to determine whether or not there is any difference in the accuracy of tooth movement with respect to a conventional protocol when low-frequency vibrations are associated with aligners replaced every 14 and 7 days.

The pressure exerted by an aligner is not evenly distributed across the entire surface of the tooth during lingual tipping of an upper incisor. The areas of force concentration were not identical, as these are influenced by factors resulting from the manufacturing and casting processes.

Simultaneous orthodontic and whitening treatment is likely to be well received by patients, since it combines two major factors involved in smile esthetics. This is particularly important because patient compliance plays a decisive role in the outcome of aligner treatment.

This case report describes the use of a miniscrew-assisted rapid palatal expander and aligners to correct bilateral cross-bite and crowding in an adult patient with a Class III skeletal pattern. This case report demonstrates the successful treatment with a narrow maxilla and bilateral cross-bite using a nonsurgical, conservative treatment.

The aim of this study was to describe an esthetic orthodontic treatment using aligners in an adult patient with class II subdivision associated with crowding and dental crossbite. An 18-year-old hyperdivergent male patient with skeletal class II from mandibular retrusion presented for an orthodontic treatment. Occlusally, the patient presents class II subdivision, crossbite at tooth 4.4, an upper midline deviated towards the left with respect to the lower and facial midlines, and slight crowding in both arches. The patient refused conventional fixed multibracket treatment in favor of aligners. Pre- and post-treatment records as well as 1-year follow-up records are presented.

Orthodontic aligner performance is strongly influenced by the material of their construction. Stress release, which may exceed 50% of the initial stress value in the early hours of wear, may cause significant changes in the behavior of the polymers at 24 hours from the application of orthodontic loads, which may influence programmed tooth movement.

The aim of this study was to evaluate the predictability of F22 aligners (Sweden & Martina, Due Carrare, Italy) in guiding teeth into the positions planned using digital orthodontic setup.

The aim of this study was to evaluate the predictability of F22 aligners (Sweden & Martina, Due Carrare, Italy) in guiding teeth into the positions planned using digital orthodontic setup.

Of the nine cleaning strategies examined, only that involving 5 min of ultrasonication at 42 k Hz combined with a 0.3% germicidal cationic detergent was observed to be statistically effective at removing the bacterial biofilm from the surface of F22 aligners.

Commercial aligners possess significantly different optical, and therefore aesthetic, properties, both as delivered and following aging. The aim was to assess and compare absorbance and transmittance values of three types of clear orthodontic aligners before and after two cycles of in vitro aging.

«This case report describes the treatment of an 11-year-old boy with hypodivergent skeletal
Class II, complete molar and canine Class II on the right and edge-to-edge relationship on the left,
centered midlines, deep bite, and large over jet. The patient was treated with a Runner appliance, a series of clear aligners with embedded resin blocks that advance the mandible. This functional appliance was designed on the basis of the construction bite provided by the orthodontist and enables simultaneous incisor alignment to be achieved thanks to pre-programming during the digital setup.»

The results of this analysis lead us to conclude that the retainers had no effect on athletic performance, and that the improvement in this criteria noted in both groups in the second session was probably brought about by training.

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