Study of the Effect of GapSeal on Microgap and Microleakage in Internal Hex Connection After Cyclic Loading

Abstract

Background and Aim: Formation of microgaps between the fixture and abutment surfaces is still one of the major problems that may lead to mechanical and biological failure and inflammation around the implant. In this study, the effect of GapSeal on the prevention of liquid leakage and microgap in internal hex connection was investigated. Materials and Methods: In this experimental study, sixteen internal hex implants (BioHorizons) were used in two groups. All implant-abutment assemblies were mounted in acrylic molds. GapSeal was inserted into the implants in the case group. All specimens were given a torque of 30 Ncm. Then, 1,200,000 cycles with a 100-N force and frequency of 1 Hz were applied to all samples. The samples were immersed in a methylene blue solution for microleakage evaluation. Microgap was randomly measured at six areas using scanning electron microscopy (SEM). Data were analyzed by SPSS 22 software using t-test. Result: The size of microgap was 3.04±0.54 µm in the control group and 0.99±0.39 µm in the case group, which was three times larger in the control group; the t-test showed that this difference was significant (P<0.000). In the control group, all samples (100%) showed leakage in the internal hex connection while in the case group, none of the samples (0%) showed leakage; Fischer's exact test showed that the difference was statistically significant (P<0.0001). Conclusion: According to the results of this study, it can be concluded that GapSeal reduces microgap and microleakage in the case group compared to the control group.

Effect of Different Dental Implant Prosthetic Joints on Marginal Bone Loss: Emerging Findings from a Bayesian Network Meta-Analysis (NMA) and Systematic Review

“…In the literature, the press-fit joint has been proposed to reduce the micro-gaps and improve the stability of the implant-abutment joint [32,51]. A precise adaptation of the prosthetic components is certainly important to produce a higher stability at the implant interfaces avoiding the creation of gaps [54]. The prosthetic joint precision fit is also a theoretical critical point for external and internal flat-to-flat systems, where the loading and the bending impairment could produce a marginal decoupling of the components [51].…”

Comparative evaluation of the microbial leakage at two different implant-abutment interfaces using a new sealant

“…Numerous efforts were put in, to seal the microgap between the implant and the abutment for preventing microleakage at the implant-abutment interface. Several materials have been used to seal the implantabutment interface, such as, adhesive, silicone Oring, a silicon hermetic washer, chlorhexidine-thymol varnish, and 2% chlorhexidine solution, some commercial antiseptic sealents like Gapseal, Keiroseal are also available [28][29][30][31][32][33] .…”