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Clinical Oral Investigations

, Volume 22, Issue 6, pp 2389–2399 | Cite as

Impacted and transmigrated mandibular canines: an analysis of 3D radiographic imaging data

  • Michael H. Bertl
  • Clemens Frey
  • Kristina Bertl
  • Katharina Giannis
  • André Gahleitner
  • Georg D. Strbac
Original Article
  • 340 Downloads

Abstract

Objectives

Impacted and transmigrated mandibular canines differ greatly in incidence, etiopathology, associated anomalies, and treatment prospects, when compared to their maxillary counterparts. The aim of this study was to provide a detailed analysis of 3D radiographic imaging data of impacted mandibular canines.

Materials and methods

In a retrospective cross-sectional study, CT/CBCT data of 88 patients with a total of 94 impacted mandibular canines were analysed. Evaluated parameters included location, morphology, neighbouring structures, associated anomalies, the influence of those factors on mandibular canine transmigration, as well as applied treatment.

Results

Transmigration was found to occur in 40.4% of impacted mandibular canines. Transmigrated canines were located significantly more basally and horizontally angulated. Further, transmigration was significantly associated with a lack of contact to adjacent teeth and the canine’s apex not contacting the mandibular cortical bone. The overall incidence of root resorptions of adjacent teeth related to impacted mandibular canines was 7.3% and was more likely, if the canine was lingually impacted. While about half of the non-transmigrated impacted canines were orthodontically aligned, half of the transmigrated canines were surgically removed. Monitoring was the second most applied treatment strategy for both groups, and no canines were autotransplantated.

Conclusions

Root resorption of adjacent teeth and transmigration are commonly occurring phenomena related to impacted mandibular canines.

Clinical relevance

Treatment often entails the surgical removal of the canine—especially in cases of transmigration. The findings emphasise the importance of early diagnosis and CT/CBCT imaging for further diagnostics and future research of impacted mandibular canines.

Keywords

Mandibular canine Impaction Root resorption Transmigration CT CBCT 3D imaging 

Notes

Funding

The work was supported by the Divisions of Oral Surgery, Orthodontics, Radiology, and Dental Student Training and Patient Care, School of Dentistry, Medical University of Vienna, Vienna, Austria, as well as the Department of Periodontology, Faculty of Odontology, University of Malmö, Malmö, Sweden.

Compliance with ethical standards

Conflict of interest

Michael H. Bertl declares that he has no conflict of interest. Clemens Frey declares that he has no conflict of interest. Kristina Bertl declares that she has no conflict of interest. Katharina Giannis declares that she has no conflict of interest. André Gahleitner declares that he has no conflict of interest. Georg D. Strbac declares that he has no conflict of interest.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Informed consent

For this type of study, formal consent is not required.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Michael H. Bertl
    • 1
  • Clemens Frey
    • 2
  • Kristina Bertl
    • 2
    • 3
  • Katharina Giannis
    • 4
  • André Gahleitner
    • 5
    • 6
  • Georg D. Strbac
    • 2
  1. 1.Division of Orthodontics, School of DentistryMedical University of ViennaViennaAustria
  2. 2.Division of Oral Surgery, School of DentistryMedical University of ViennaViennaAustria
  3. 3.Department of Periodontology, Faculty of OdontologyUniversity of MalmöMalmöSweden
  4. 4.Division of Dental Student Training and Patient Care, School of DentistryMedical University of ViennaViennaAustria
  5. 5.Division of Radiology, School of DentistryMedical University of ViennaViennaAustria
  6. 6.Department of Diagnostic Radiology, Division of Osteoradiology, General HospitalMedical University of ViennaViennaAustria

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