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External apical root resorption after nonextraction orthodontic treatment with labial vs. lingual fixed appliances

  • Hande PamukçuEmail author
  • Ömür Polat-Özsoy
  • Ayşe Gülşahi
  • Mehmet Özgür Özemre
Original Article

Abstract

Objectives

The aim of this retrospective study is to compare external apical root resorption (EARR) after labial and lingual fixed orthodontic treatment, as detected with panoramic radiographs.

Materials and methods

Sixty subjects were divided into two groups according to the treatment type: lingual (30 patients) and labial (30 patients) fixed orthodontic treatment. Panoramic radiographs which were obtained at the beginning of treatment (T0) and at the end of the treatment (T1) were evaluated. The maxillary and mandibular central and lateral incisors, as well as canine crown and root lengths were measured for T0 and T1. Crown to root ratios were used to determine EARR. Data were evaluated using analysis of variance and χ2 analysis.

Results

In all, 5 patients (16.7%) in the lingual group and 7 patients (23.3%) in the labial group had a minimum of one tooth with severe EARR, while 9 patients (30%) in the lingual group and 14 patients (46.7%) in the labial group had no EARR. A total of 26 teeth (7.2%) in the lingual group and 34 teeth (9.4%) in the labial group developed severe EARR; however, 184 teeth (51.1%) in the lingual group and 202 teeth (56.1%) in the labial group did not reveal any EARR. No statistically significant difference was found for the resorption rates between the treatment groups (p > 0.05). Although not statistically significant, there was a higher percentage of severe EARR in the mandible within the labial group.

Conclusions

Both lingual and labial orthodontic techniques showed statistically similar root resorption rates. EARR is a multifactorial issue and individual predispositions must also be taken into consideration.

Keywords

Lingual technique Fixed orthodontic treatment Root resorption rates Tooth length Dental radiography 

Externe apikale Wurzelresorption nach labialer vs. lingualer kieferorthopädischer Behandlung mit festsitzenden Apparaturen ohne Extraktion

Zusammenfassung

Ziele

Ziel dieser retrospektiven Studie ist es, externe apikale Wurzelresorptionen (EARR) nach labialer und lingualer festsitzende kieferorthopädischer Behandlung anhand Untersuchungen an Panoramaschichtaufnahmen zu vergleichen.

Material und Methoden

Sechzig Probanden wurden je nach Behandlungsart in die folgenden 2 Gruppen eingeteilt: linguale (30 Patienten) und labiale (30 Patienten) festsitzende kieferorthopädische Behandlung. Zu Beginn der Behandlung (T0) und am Ende der Behandlung (T1) wurden Panoramaschichtaufnahmen angefertigt und ausgewertet. Kronen- und Wurzellängen der zentralen und lateralen Inzisiven sowie der Eckzähne in Ober- und Unterkiefer wurden zu den Zeitpunkten T0 und T1 gemessen. Mittels der Kronen-Wurzel-Verhältnisse wurde die EARR bestimmt. Die Datenauswertung erfolgte mittels Varianz- und χ2-Analyse.

Ergebnisse

Insgesamt hatten 5 Patienten (16,7%) in der lingualen Gruppe und 7 Patienten (23,3%) in der labialen Gruppe mindestens einen Zahn mit schwerer EARR, während 9 Patienten (30%) in der lingualen Gruppe und 14 Patienten (46,7%) in der labialen Gruppe keine EARR aufwiesen. Insgesamt 26 Zähne (7,2%) in der lingualen und 34 Zähne (9,4%) in der labialen Gruppe entwickelten eine schwere EARR; jedoch zeigten 184 Zähne (51,1%) in der lingualen und 202 Zähne (56,1%) in der labialen Gruppe keine EARR. Ein statistisch signifikanter Unterschied für die Resorptionsraten zwischen den Behandlungsgruppen wurde nicht gefunden (p > 0.05). Obwohl statistisch nicht signifikant, gab es innerhalb der Labialgruppe einen höheren Prozentsatz an schwerer EARR im Unterkiefer.

Schlussfolgerungen

Sowohl linguale als auch labiale kieferorthopädische Techniken zeigten statistisch ähnliche Wurzelresorptionsraten. Die EARR ist ein multifaktorielles Phänomen, bei dem auch individuelle Prädispositionen zu berücksichtigen sind.

Schlüsselwörter

Linguale Technik Kieferorthopädie mit festsitzender Apparatur Wurzelresorptionsraten Zahnlänge Röntgenuntersuchung der Zähne 

Notes

Funding

This study was supported by the Başkent University Research Fund.

Compliance with ethical guidelines

Conflict of interest

H. Pamukçu, Ö. Polat-Özsoy, A. Gülşahi and M.Ö. Özemre declare that they have no competing interests.

Ethical standards

This study was approved by Başkent University Institutional Review Board (protocol number: D‑KA 17/ 03). Written informed consent of the patients were present in patients’ file as a regular procedure.

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Copyright information

© Springer Medizin Verlag GmbH, ein Teil von Springer Nature 2019

Authors and Affiliations

  1. 1.School of Dentistry, Department of OrthodonticsBaşkent UniversityAnkaraTurkey
  2. 2.Private Practice and School of Dentistry, Department of OrthodonticsBaşkent UniversityAnkaraTurkey
  3. 3.School of Dentistry, Department of Dentomaxillofacial RadiologyBaşkent UniversityAnkaraTurkey

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