In vivo evaluation of the sealing ability of two endodontic sealers in root canals exposed to the oral environment for 45 and 90 days

Abstract

This in vivo study evaluated the sealing ability of a resin-based sealer (AH Plus) and a zinc oxide-eugenol sealer (Endofill) in dogs' teeth, exposed to the oral environment for 45 and 90 days. Forty eight lower incisors from 8 dogs were endodonticaly treated. A stratified randomization determined the sealer use in each root canal. All canals were filled using the lateral condensation technique. The excess filling material at the cervical portion of the root canal was sectioned, leaving a 10-mm obturation length inside the canal. Teeth were provisionally sealed with glass ionomer cement for 24 h and the canals were exposed to the oral environment for either 45 or 90 days. Therefore, the experimental groups were as follows: A45- AH Plus for 45 days; A90- AH Plus for 90 days; E45- Endofill for 45 days; and E90- Endofill for 90 days (n=12). After the experimental period, the dogs were killed and the lower jaw was removed. The incisors were extracted and the roots were covered with two coats of nail varnish. The teeth were immersed in India ink for 96 h and submitted to diaphanization. Dye leakage (in mm) was measured using stereomicroscopy (10x magnification). The results were statistically analyzed using two-way ANOVA and Tukey test for multiple comparisons (á = 0.05). Group E90 (2.03±0.94) showed significantly higher mean leakage value than all other groups (p<0.001). None of the sealers, in both study conditions, were able to prevent dye leakage.

Biological Tissue Response to a New Formulation of a Silicone Based Endodontic Sealer

“…Endodontic sealers act as union agents between guttapercha and root canal walls, and must be able to fill gaps not reached by the solid obturation material (1,2). Besides presenting adequate physical properties, satisfactory biological behavior is a necessary requirement for their clinical application.…”

Clinical microscopic analysis of protaper retreatment system efficacy considering root canal thirds using three endodontic sealers

“…Removal of filling material is an important factor in root canal retreatment because it allows chemomechanical reinstrumentation and redisinfection of the root canal system It provides better access to the necrotic tissue remnants and microorganisms. However, previous studies have found that completely clean canal walls were not produced with any of the techniques investigated (Celik Ünal et al,2009; Giuliani et al,2008; Gu et al,2008; Hülsmann and Bluhm,2004; Kopper et al,2006; Maciel and Scelza,2006; Sae‐Lim et al,2000; Schirrmeister et al,2006a,b,c). Giuliani et al (2008) found ProTaper Universal retreatment system to perform better than hand K‐File or Profile rotary instrumentation, but filling debris remain in all samples.…”

“…They used one sealer type, Endofill. This sealer, according to a previous study (Kopper et al,2006), allows leakage to a greater extent than adhesive sealers, which possibly makes it easier to be removed.…”

Comparative Evaluation of Push-out bond Strength of Three Endodontic Sealers with and without Amoxicillin-An Invitro Study

“…Prognosis is the forecast of the course of a disease. To achieve this goal, the filling material should allow sealing of the root canal at both the root apex and the crown [13]. Microorganisms are the major aetiological agents responsible for pulpal and periapical pathology.…”