Caries Susceptibility of Endodontically Versus Nonendodontically Treated Teeth

By Merdad K, Sonbul H, Bukhary S, Reit C, Birkhed D

Date: 08/2012
Journal: JOE

Purpose: to assess the difference in caries susceptibility between endodontically treated teeth (ETT) and non-endodontically treated teeth (NETT) – N= 20 patients


•Each patient had a minimum of 2 endo-treated and 2 non endo-treated teeth on the contralateral side (control group).

•All teeth required having coronal filling ranging from simple occlusal filling to a crown.

•Patient was examined for

(1)de novo plaque formation (using plaque index),

(2) cariogenic microflora (S. Mutans and lactobacilli),

(3) pH drop in proximal plaque in situ,

(4) the quality of the coronal filling/crown including recurrent caries.

Most Highlighted Results:  

-The scores of the S.mutans counts and de-novo plaque formation in ETT > NETT

-The initial pH of dental plaque was significantly lower in ETT

-Clinical evaluation showed that, irrespective of the type of the restoration, recurrent decay was significantly higher in ETT 47.5% compared with their counterparts 22.5%.

Clinical Significance: 

ETT were more susceptible to caries. This could be attributed to the alteration of the biological environment of the tooth, such as the increase in S.mutans counts or to the inadequacy of the dental restoration after endodontic treatment.