Abstract
Objective: To evaluate the effect of material thickness and width of the gingival edge on the forces and moments delivered by aligners prepared from Duran foil (PET-G) to a maxillary incisor during tipping and intrusion. Materials and Methods: Aligners prepared from PET-G of three material thicknesses (0.5, 0.625, and 0.75 mm) and three widths of gingival edges (0-1, 3-4, and 6-7 mm) were investigated during incisor palatal tipping and intrusion of 0.5 mm each. Forces and moments were measured with a six-component measuring device. The influence of aligner thickness and aligner extend on the force and moment development were tested for statistical significance (P <.05). Results: The F-x and F-z forces produced during palatal tipping and intrusion by the 0.75-mm aligner material was significantly higher than those produced by the 0.5-mm-thick material (P=.005 and P =.047, respectively). There was no statistical difference between aligner thickness of 0.5 and 0.625 mm and between 0.625 and 0.75 mm. The same behavior was observed for the palatal moment (M-y). The F-x and F-z forces produced during palatal tipping and intrusion by the aligner with an extension of 0-1 mm edge was significantly lower than that of the aligner with a larger extension (34 mm edge: P =.003;6-7 mm: P =.001). However, there was no statistical difference between aligners with a 3-4-mm and a 6-mm edge. The same behavior was observed for the palatal moment (M-y). Conclusions: The forces and moments exerted by the PET-G aligner on teeth vary, depending on the material thickness, width of the aligner edge, and direction of tooth movement.
| Dokumententyp: | Zeitschriftenartikel |
|---|---|
| Fakultät: | Medizin |
| Themengebiete: | 600 Technik, Medizin, angewandte Wissenschaften > 610 Medizin und Gesundheit |
| ISSN: | 0003-3219 |
| Sprache: | Englisch |
| Dokumenten ID: | 50875 |
| Datum der Veröffentlichung auf Open Access LMU: | 14. Jun. 2018, 09:44 |
| Letzte Änderungen: | 04. Nov. 2020, 13:28 |
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