Survival of surgical endodontic treatment performed in a dental teaching hospital: a cohort study

Int Endod J. 2004 Nov;37(11):764-75. doi: 10.1111/j.1365-2591.2004.00869.x.

Abstract

Aim: To assess the survival function of surgical endodontic treatment performed at least 1 year before in a dental teaching hospital.

Methodology: A total of 194 teeth surgically treated between 1991 and 2001 were recalled and examined clinically and radiographically using a set of strict criteria. The Kaplan-Meier method and log rank test were used to evaluate the survival time. Confounding factors were examined by Cox regression analysis.

Results: The median survival time of the 154 first-time surgically treated teeth was 92.1 months (95% CI: 40.9-143.4) and that of the 40 resurgery cases was 39.1 months (95% CI: 6.1-72.1) up to the date of recall. There was a significant difference in the length of survival between the two groups. For those first-time surgery cases, the preoperative marginal bone loss and the operator had a significant influence on the survival time (P < 0.05).

Conclusions: The survival of surgical endodontic treatment declined nonlinearly with time. The preoperative marginal bone loss, operator and resurgery were important factors affecting the survival of this treatment modality.

MeSH terms

  • Alveolar Bone Loss / etiology
  • Cohort Studies
  • Dental Clinics
  • Dental Restoration Failure*
  • Endodontics / education
  • Humans
  • Observer Variation
  • Periapical Periodontitis / complications
  • Periapical Periodontitis / diagnostic imaging
  • Periapical Periodontitis / surgery*
  • Proportional Hazards Models
  • Radiography
  • Reoperation
  • Retrograde Obturation*
  • Survival Analysis
  • Treatment Outcome