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Purpose <p>This study aimed to evaluate the success rate of pulpectomy in primary teeth under dental general anaesthesia (DGA), identify factors associated with outcomes in teeth with periapical disease, and investigate the characteristics and factors associated with hollow-tube formation.</p> Methods <p>We, retrospectively, analysed children undergoing primary tooth pulpectomy under DGA between December 2019 and November 2022. Demographic data, preoperative dental status, operative parameters, and follow-up outcomes were collected. Tooth survival was assessed with life-table analysis, and associated factors were analysed using multivariate Cox regression, with failure times for interval-censored data approximated at midpoints. Logistic regression was used to evaluate factors associated with root filling material resorption.</p> Results <p>Amongst 528 treated primary teeth from 171 patients (mean age 4.66&#xa0;years), median survival time fell within ranges of 36 to 42&#xa0;months clinically and 30 to 36&#xa0;months radiographically. Multivariable regression identified age, tooth type, endodontic diagnosis, and obturation quality as significant indicators of failure (<i>p</i> &lt; 0.05). In teeth with apical lesions, preoperative root resorption was significantly associated with failure (<i>p</i> = 0.028). Radiographically, 469 teeth showed resorption of filling material. Of 145 teeth exhibiting the hollow tubes, 33 progressed to radiographic failure. Younger age, pulpitis, and overfilling were the factors associated with hollow-tube formation.</p> Conclusion <p>The survival rate of primary teeth after pulpectomy under DGA declined rapidly over time. In teeth with apical lesions, preoperative root resorption was a major factor affecting survival. While teeth showing hollow tubes may demonstrate short-term stability, the long-term prognosis remains uncertain.</p>

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A long-term retrospective evaluation of pulpectomy and calcium hydroxide/iodoform paste resorption in primary teeth managed under dental general anaesthesia

  • 期刊论文

  • 发表日期：

    2026年3月27日

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  • J. Zhao,
  • Q. Wang,
  • F. Xie,
  • K. Sheng,
  • G. Lai,
  • J. Wang

摘要

Purpose

This study aimed to evaluate the success rate of pulpectomy in primary teeth under dental general anaesthesia (DGA), identify factors associated with outcomes in teeth with periapical disease, and investigate the characteristics and factors associated with hollow-tube formation.

Methods

We, retrospectively, analysed children undergoing primary tooth pulpectomy under DGA between December 2019 and November 2022. Demographic data, preoperative dental status, operative parameters, and follow-up outcomes were collected. Tooth survival was assessed with life-table analysis, and associated factors were analysed using multivariate Cox regression, with failure times for interval-censored data approximated at midpoints. Logistic regression was used to evaluate factors associated with root filling material resorption.

Results

Amongst 528 treated primary teeth from 171 patients (mean age 4.66 years), median survival time fell within ranges of 36 to 42 months clinically and 30 to 36 months radiographically. Multivariable regression identified age, tooth type, endodontic diagnosis, and obturation quality as significant indicators of failure (p < 0.05). In teeth with apical lesions, preoperative root resorption was significantly associated with failure (p = 0.028). Radiographically, 469 teeth showed resorption of filling material. Of 145 teeth exhibiting the hollow tubes, 33 progressed to radiographic failure. Younger age, pulpitis, and overfilling were the factors associated with hollow-tube formation.

Conclusion

The survival rate of primary teeth after pulpectomy under DGA declined rapidly over time. In teeth with apical lesions, preoperative root resorption was a major factor affecting survival. While teeth showing hollow tubes may demonstrate short-term stability, the long-term prognosis remains uncertain.