Knaup, Isabel and Bartz, Jenny Rosa and Schulze-Spaete, Ulrike and Craveiro, Rogerio Bastos and Kirschneck, Christian and Wolf, Michael (2021) Side effects of twistflex retainers-3D evaluation of tooth movement after retainer debonding. JOURNAL OF OROFACIAL ORTHOPEDICS-FORTSCHRITTE DER KIEFERORTHOPADIE, 82. pp. 121-130. ISSN 1434-5293, 1615-6714
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Purpose Evaluation of tooth movement after retainer debonding in retainer-associated misalignment cases. Methods This pilot study is based on a retrospective data analysis. Adult patients (age 25.5 +/- 4.9 years) wearing fixed twistflex retainers and having visible retainer-associated misalignment were included and examined for tooth movement after retainer debonding. Orthodontic study models were taken at retainer debonding (t0) and 14 (+/- 1) weeks later (t1). They were digitally superimposed using 2D/3D dental imaging software and tooth movement was analyzed in all three dimensions. Results A total of 23 teeth (12 upper teeth: 10 incisors, 2 canines; 11 lower teeth: 7 incisors, 4 canines) were analyzed. Mean overall tipping was 1.11 +/- 0.82 degrees in the mesial/distal direction (angulation, x-axis), 2.02 +/- 1.9 degrees in the buccal/lingual direction (inclination, y-axis) and 1.28 +/- 0.99 degrees around the tooth axis (z-axis). Mean overall bodily movement was 0.30 +/- 0.31 mm in the mesial/distal direction (angulation, x-axis), 0.10 +/- 0.13 mm in the buccal/lingual direction (inclination, y-axis), and mean in- or extrusion 0.22 +/- 0.24 mm (z-axis). Mean tipping and bodily movement were more pronounced in the upper jaw. Conclusion The present data shows that tooth movement after debonding of twistflex retainers can be expected in misalignment cases.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FIXED RETAINERS; FOLLOW-UP; WIRES; HEALTH; Orthodontic appliances; fixed; X‑ effect; Retention; Bonded retainers; Orthodontic retainers |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Kieferorthopädie |
| Depositing User: | Petra Gürster |
| Date Deposited: | 21 Apr 2021 09:18 |
| Last Modified: | 21 Apr 2021 09:18 |
| URI: | https://pred.uni-regensburg.de/id/eprint/43294 |
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