Journal of Research in Dental and Maxillofacial Sciences

en Study of the Effect of GapSeal on Microgap and Microleakage in Internal Hex Connection After Cyclic Loading Dental implant Dental implant Original article Original article 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. Results: 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. Dental Implant-Abutment Design, Dental Leakage/Microbiology, Siloxanes, Dental Implants, Dental Leakage/Prevention and Control 36 42 http://jrdms.dentaliau.ac.ir/browse.php?a_code=A-10-708-3&slc_lang=en&sid=1 SH Naser mostofy 10031947532846009027 10031947532846009027 No Assistant professor, Prosthodontics Dept, Dental Faculty, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran E Jalalian 10031947532846009028 10031947532846009028 No Assistant professor, Prosthodontics Dept, Member of implant research center, Dental Faculty, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran N Valaie 10031947532846009029 10031947532846009029 No Faculty member of Thalasemia Research center, Mazandaran ,Iran Z Mohtashamrad 10031947532846009030 10031947532846009030 No Dentist A Haeri 10031947532846009031 10031947532846009031 No Postgraduate student, Oral and maxillofacial surgery Dept, Dental Faculty, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran T Bitaraf taherehbitaraf@yahoo.com 10031947532846009032 10031947532846009032 Yes Assistant professor, Dental Implant Research Center, Dental Faculty, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran