Stomatology ›› 2026, Vol. 46 ›› Issue (8): 561-566.doi: 10.13591/j.cnki.kqyx.2026.08.001

• Basic and Clinical Research •     Next Articles

Relationship between apical periodontitis and local marginal alveolar bone loss: A retrospective study

SUN Xu1, LI Jin2, SHEN Da2, WANG Xue3()   

  1. 1 Department of Stomatology, Liyang People’s Hospital, Liyang 213300, China
  • Received:2026-04-20 Online:2026-08-28 Published:2026-08-24

Abstract:

Objective To investigate the association between apical periodontitis(AP) and local marginal alveolar bone loss(ABL) based on cone beam computed tomography(CBCT). Methods This study adopted an intra-subject contralateral paired design. A total of 48 patients with 60 pairs of matched teeth were included. Teeth with definite apical periodontitis, defined as a CBCT-periapical index(CBCT-PAI) score ≥3, were assigned to the AP group, while the contralateral teeth with normal periapical status(PAI≤1) served as the control group. ABL was measured on CBCT images, and the alveolar bone loss percentage(ABL%) was calculated. Group comparisons were performed using the Wilcoxon signed-rank test, McNemar test, and Stuart-Maxwell test. Multivariable linear mixed-effects models(LMMs) were used to evaluate the trend association between CBCT-PAI scores and the extent of bone loss. Results The AP group showed significantly greater mean ABL and ABL percentage than the control group. The impact of AP on alveolar bone loss is more significant in the anterior teeth and molars. After adjustment for tooth type and other relevant factors, AP remained an independent factor associated with increased mean ABL and ABL percentage. Among AP teeth, each 1-point increase in CBCT-PAI score was associated with a 0.64 mm increase in mean ABL and a 5.07% increase in ABL percentage. Conclusion Apical periodontitis is significantly associated with increased local marginal ABL.

Key words: apical periodontitis, alveolar bone loss, intra-subject paired study, periapical index, endodontic-periodontal relationship

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