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. 2024 Dec 20;9(4):418-424.
doi: 10.14744/eej.2023.04274. Epub 2024 Oct 31.

Increasing the Apical Sizes of Root Enlarged for Root Canal Obturation Influences the Outcome of Single-Root-Canal Teeth Affected by Apical Periodontitis

Shizu Hirata-Tsuchiya  1 , Daisuke Furutama  1 , Noriko Saito-Nakayama  1 , Tomoya Naruse  1 , Tomoki Kawayanagi  1 , Saki Nishihama  1 , Ayaka Miyata  1 , Satomi Shirawachi  1 , Naoki Sadaoka  1 , Chutian Wang  1 , Kazuma Yoshida  1 , Jun Nakanishi  1 , Shinji Matsuda  2 , Katsuhiro Takeda  1 , Hideki Shiba  1
Affiliations

Increasing the Apical Sizes of Root Enlarged for Root Canal Obturation Influences the Outcome of Single-Root-Canal Teeth Affected by Apical Periodontitis

Shizu Hirata-Tsuchiya et al. Eur Endod J. .

Abstract

Objective: To investigate the effect of increasing the apical size of roots enlarged for root canal obturation on the outcome of non-surgical endodontic treatment for teeth with apical periodontitis.

Methods: In this retrospective study, we included 210 cases of single-rooted canals treated at our dental units between October 2009 and January 2022. The clinical outcomes of teeth with enlarged root apical size from the International Organization for Standardization standard numbers 25 to 100 were investigated.

Results: The number of teeth with a root apical size of ≤50 and ≥ 55 were 158 and 52, respectively. In the former case, 144 (68.6%) teeth had good prognoses and 14 (6.7%) had poor prognoses. In the latter case, 28 (13.3%) teeth had good prognoses and 24 (11.4%) had poor prognoses.

Conclusion: Unfavourable clinical outcomes were observed in root canal-filled teeth with an enlarged apical root size of ≥ 55. Thus, these sizes potentially indicate poor outcomes of nonsurgical endodontic treatments.

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Conflict of interest statement

All authors declared no conflict of interest.

Figures

Figure 1
Figure 1
Flowchart of the study with the inclusion and exclusion criteria ISO: The International Organization for Standardization
Figure 2
Figure 2
Representative cases of apical sizes for root canal filling with ISO number 50 and 55. Before (a) and after (b) treatment of a case of mandibular left second premolar with root canal filling with ISO number 50 gutta-percha points. Two-year follow-up radiograph shows healing of the periapical lesion (good outcome). Before (c) and after (d) treatment of a case of maxillary left central incisor with root canal filling with ISO number 55 gutta-percha points. Seven-month follow-up radiograph does not show healing of the periapical lesion (poor outcome) ISO: The International Organization for Standardization
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