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


METHODS
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.
Wang
Q
Q
Department of Operative Dentistry and Endodontics, The Stomatological Hospital of Wuhan University, Hubei, China.
Cheung
G S P
GS
Ng
R P Y
RP
D016301:Alveolar Bone Loss / Q000209:etiology; D015331:Cohort Studies; D003740:Dental Clinics; D019232:Dental Restoration Failure; D004708:Endodontics / Q000193:education; D006801:Humans; D015588:Observer Variation; D010485:Periapical Periodontitis / Q000150:complications / Q000000981:diagnostic imaging / Q000601:surgery*; D016016:Proportional Hazards Models; D011859:Radiography; D012086:Reoperation; D012184:Retrograde Obturation; D016019:Survival Analysis; D016896:Treatment Outcome