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Retrospective fractal analyses of one-year follow-up data obtained after single-visit nonsurgical endodontic retreatment on periapical radiographs

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Abstract

Objectives

The aim of retrospective study was to evaluate the changes to the periapical bone sites after non-surgical endodontic retreatment by using fractal analysis on periapical radiographs.

Materials and methods

Thirty patients whose teeth had periapical lesions and underwent primary endodontic treatment were selected for nonsurgical single-visit endodontic retreatment. Two radiographs were taken, the first immediately after retreatment and the second at the 1-year follow-up. An identical region of interest close to the infected root apex was selected from each radiograph. FD was measured using the box-counting method. Periapical status was evaluated using the periapical index (PAI). Treatment outcomes were categorized into healed (PAI < 3), or not healed (PAI ≥ 3) based on radiographic criteria.

Results

The mean FD value significantly increased at the 1-year follow-up compared to baseline. No significant sex biases were apparent. According to the PAI, retreatment after 1 year resulted in a 63.3% healed.

Conclusion

The extent of periapical trabecular bone evident radiographically increased, as revealed by FD data, 1 year after endodontic retreatment.

Clinical relevance

The use of fractal analysis as a quantitative method to evaluate changes in periapical trabecular bone (such as healing and inflammation) after endodontic retreatment can be an important marker in determining the prognosis of endodontic retreatment.

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Acknowledgements

The authors would like to thank Hande Şenol for her assistance as statistical analyzer.

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Authors and Affiliations

  1. Department of Endodontics, Faculty of Dentistry, Pamukkale University, 20160, Pamukkale, Denizli, Turkey

    Samet Tosun

  2. Department of Endodontics, Faculty of Dentistry, Katip Çelebi University, 35300, İzmir, Turkey

    Emrah Karataslioglu & Mustafa Mert Tulgar

  3. Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Pamukkale University, 20160, Denizli, Turkey

    Gözde Derindag

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  1. Samet Tosun
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  2. Emrah Karataslioglu
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  4. Gözde Derindag
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Correspondence to Samet Tosun.

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The study was approved by the Pamukkale University Ethics Committee (approval number E-60116787–020–4352).

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The need for informed patient consent was waived because we used only anonymized retrospective data.

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The authors declare no competing interests.

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Tosun, S., Karataslioglu, E., Tulgar, M.M. et al. Retrospective fractal analyses of one-year follow-up data obtained after single-visit nonsurgical endodontic retreatment on periapical radiographs. Clin Oral Invest 25, 6465–6472 (2021). https://doi.org/10.1007/s00784-021-04079-0

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