Comparison of push‐out bond strength of endodontic sealers after root canal drying with different techniques

Abstract

Objectives An ideal endodontic sealer should bond to both dentin and root‐filling material. This study aimed to assess the push‐out bond strength (PBS) of mineral trioxide aggregate (MTA)‐Fillapex, Endoseal MTA, AH26, and Sure‐Seal Root to root dentin after root canal drying with different techniques. Materials and Methods This in vitro study was conducted on 160 extracted mandibular premolars. After root canal preparation, the teeth were randomly divided into four groups ( n = 40) of drying with ethanol, paper point, air vacuum, and control (wet canal). Each group was divided into four subgroups ( n = 10) for use of AH26, Sure‐Seal Root, MTA‐Fillapex, and Endoseal MTA sealers. The mean PBS was measured by a universal testing machine. The mode of failure was determined under a stereomicroscope. Data were analyzed by the Kruskal–Wallis and Games–Howell tests. Results The maximum mean PBS was equally recorded in ethanol and paper point groups, and was significantly higher than that of control and air vacuum groups ( p < .001). In the use of AH26 sealer, the mean PBS in drying with ethanol was significantly higher than all other methods ( p < .05). The mean PBS in drying with a paper point was also significantly higher compared with control and air vacuum methods ( p < .05). In the use of Sure‐Seal, the mean PBS in drying with a paper point was significantly higher than other methods ( p < .05). The mean PBS in drying with ethanol was significantly higher than that in control and air vacuum methods ( p < .001). In the use of MTA‐Fillapex and Endoseal‐MTA, the technique of drying had no significant effect on PBS. Adhesive and mixed failures were the most common in all drying groups. Conclusions Drying with ethanol and paper point enhanced the PBS of sealers to root dentin.

Dentin Bond Strength of Calcium Silicate-Based Materials: A Systematic Review of In Vitro Studies

“…In the evaluation of bioceramic cements, namely, iRoot SP, MTA Fillapex, Endoseal MTA, and SureSeal Root, it was found that the optimal humidity conditions for achieving ideal strength involved normal humidity using the conventional protocol (paper tips), enhancing the adhesive strength of the sealers [46,49]. Calcium silicate and calcium phosphate in the composition of CSCs rely on humidity for the hydration reaction, allowing the sealer to set and harden [19].…”

“…It is noteworthy that while many studies only assess the sealer to examine the impact of humidity on the bond strength to root dentin, the behavior of these cements in clinical applications, particularly when used in conjunction with gutta-percha cones, should also be considered [19]. Consequently, the careful selection of the drying technique based on the type of cement used emerges as a critical step in endodontic treatment [46].…”

“…The following supporting information can be downloaded at https: //www.mdpi.com/article/10.3390/app14010104/s1, Table S1: POBS results from the included studies. References [3,[35][36][37]39,40,[42][43][44][45][46][47][48][49][50]52] are cited in the Supplementary Materials.…”