Abstract
Objectives
This study evaluated and compared the effects of low-level laser therapy (LLLT) and piezocision on the amount of orthodontic tooth movement.
Materials and methods
Forty maxillary canines from 20 patients (mean age, 16.35 ± 1.14 years) were evaluated in a split-mouth design study. Miniscrew-supported canine distalization was performed. Piezocision was applied in the right maxillary canine region, and the left maxillary canines were irradiated with a diode laser (940 nm, 5 J/cm2). LLLT was performed on day 0 and days 3, 7, 14, 21, and 28 after the start of canine distalization in the first 4‑week period. Data were evaluated at baseline (T0) and after 4 (T1), 8 (T2), and 12 (T3) weeks. The amount of canine movement was determined from three-dimensional models, and the angulation of canines and first molars was analyzed based on lateral cephalograms.
Results
Intragroup and intergroup comparisons of canine distalization were performed for four different time intervals (T0–T1, T1–T2, T2–T3, T0–T3). The canine tooth movement in the T0–T1 period was significantly greater in the LLLT group compared to the piezocision group. No statistically significant differences were observed between the groups for the T1–T2, T2–T3, and T0–T3 periods. The amount of canine distalization in the T0–T1 period was significantly greater than that in the T1–T2 and T2–T3 periods in both groups. Tooth movement during the T1–T2 period was higher than that in the T2–T3 period in the LLLT group. Cephalometric evaluation revealed no statistically significant difference between the groups with respect to canine and first molar angulation.
Conclusion
Although laser application seems more effective during the first 4‑week period, considering the 12-week period, the effects of LLLT and piezocision on orthodontic tooth movement during canine distalization were similar.
Zusammenfassung
Zielsetzungen
Diese Studie bewertete und verglich die Auswirkungen der Low-level-Lasertherapie (LLLT) und der Piezozision auf das Ausmaß der kieferorthopädischen Zahnbewegung.
Materialien und Methoden
Vierzig Oberkiefereckzähne von 20 Patienten (Durchschnittsalter 16,35 ± 1,14 Jahre) wurden in einer Split-Mouth-Design-Studie untersucht. Es erfolgte eine minischraubengestützte Distalisierung der Eckzähne. Im rechten oberen Eckzahnbereich wurde eine Piezozision durchgeführt, die linken oberen Eckzähne wurden mit einem Diodenlaser (940 nm, 5 J/cm2) bestrahlt. Die LLLT wurde am Tag 0 sowie an den Tagen 3, 7, 14, 21 und 28 nach Beginn der Eckzahndistalisierung in der ersten 4‑Wochen-Periode durchgeführt. Die Daten wurden zu Studienbeginn (T0) sowie nach 4 (T1), 8 (T2) und 12 (T3) Wochen ausgewertet. Das Ausmaß der Bewegung der Eckzähne wurde anhand von 3‑dimensionalen Modellen bestimmt, und die Angulation der Eckzähne und ersten Molaren wurde anhand von lateralen Kephalogrammen analysiert.
Ergebnisse
Intra- und Intergruppenvergleiche der Eckzahndistalisierung wurden für 4 verschiedene Zeitintervalle (T0-T1, T1-T2, T2-T3, T0-T3) durchgeführt. Die Bewegung der Eckzähne in der T0-T1-Periode war in der LLLT-Gruppe im Vergleich zur Piezozisionsgruppe signifikant größer. Es wurden keine statistisch signifikanten Unterschiede zwischen den Gruppen für die Perioden T1-T2, T2-T3 und T0-T3 beobachtet. Das Ausmaß der Eckzahndistalisierung in der T0-T1-Periode war in beiden Gruppen signifikant größer als in den T1-T2- und T2-T3-Perioden. Die Zahnbewegung in der T1-T2-Periode war in der LLLT-Gruppe höher als in der T2-T3-Periode. Die kephalometrische Auswertung ergab keinen statistisch signifikanten Unterschied zwischen den Gruppen in Bezug auf die Angulation der Eckzähne und des ersten Molaren.
Schlussfolgerung
Zwar scheint die Laseranwendung während der ersten 4‑Wochen-Periode effektiver zu sein, doch die Auswirkungen der LLLT und der Piezozision auf die kieferorthopädische Zahnbewegung während der Eckzahndistalisierung waren unter Berücksichtigung der 12-Wochen-Periode ähnlich.
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G. Türker, İ. Yavuz and Z.B. Gönen declare that they have no competing interests.
Ethical standards
This study was approved by Erciyes University Clinical Trials Ethical Committee of the Faculty of Medicine (protocol number: 2014/251). Written informed consent of the patients were taken from the patients or their parents as a regular procedure.
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Türker, G., Yavuz, İ. & Gönen, Z.B. Which method is more effective for accelerating canine distalization short term, low-level laser therapy or piezocision? A split-mouth study. J Orofac Orthop 82, 236–245 (2021). https://doi.org/10.1007/s00056-020-00250-6
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DOI: https://doi.org/10.1007/s00056-020-00250-6
Keywords
- Accelerated tooth movement techniques
- Low-level laser therapy
- Canine retraction
- Flapless corticotomy
- Piezocision corticotomy