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:: Volume 25, Issue 2 (4-2013) ::
J Iran Dent Assoc 2013, 25(2): 62-67 Back to browse issues page
Determination of a Proper Covering Material for Fixture-Abutment Microleakage Evaluation Using Radiotracers and Gamma-Counter; A Pilot Study
Mahnaz Arshad1 , Hakimeh Siadat * 2, Babak Fallahi3 , Hosain Mahgoli4
1- Member of Dental Research Center, and Prosthodontist
2- Member of Dental implant Research Center and Associate Professor, Department of Prosthodontics, School of Dentistry, Tehran University of Medical Sciences. Tehran, Iran , hsiadat@sina.tums.ac.ir
3- Associate Professor, Department of Nuclear Medicine, School of Medicine, Shariati/Nuclear medicine, Tehran University of Medical Sciences. Tehran, Iran
4- Assistant Professor, Department of Prosthodontics, School of Dentistry, Tehran University of Medical Sciences. Tehran, Iran
Abstract:   (10338 Views)
  Background and Aim: Radioisotopes adhere to any surface in which they come in contact. Covering the sample surface with a suitable material prior to submersion and isolation of the material before counting make it possible to evaluate the penetrating radioisotopes within the interfacial area. The aim of this study was to determine a suitable material to cover implant and abutment in evaluation of microleakage in implant-abutment interface using radiotracers and gamma counter .

  Materials and Methods: In this in vitro study, 46 samples were selected and divided into two groups. The first group consisted of implant samples covered with putty, nail polish and putty-super glue with 1mm distance from the interface. The second group included non-implant samples covered with putty, autopolymerizing acrylic resin, and nail polish. This group was used for evaluation of adherence levels of the radioisotopes. Microleakage test was performed with thallium-201 and gamma counting in three phases: 1) after removing samples from thallium solution, 2) after washout of samples, and 3) after removing covering materials. In order to compare penetration of radioisotopes within the samples analysis of co-variance was carried out .

  Results: There were statistically significant differences between three phases of gamma counting and between samples in different implant groups. Microleakage of implant-putty-glue was significantly less than that of implant-putty (217343.40± 86007.926). Similarly, implant-putty showed a significantly less microleakage than implant- nail polish . (313247.20±67933.031) .

  Conclusion: The best material among the ones considered in this study turned to be putty sealed by super glue. Contrarily, nail polish was not considered suitable due to increased microleakage .

 

Keywords: Thallium-201, radioisotope, microleakage, implant, fixture-abutment interface
Full-Text [PDF 776 kb]   (2289 Downloads)    
Type of Study: Original | Subject: Prosthodontics
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Arshad M, Siadat H, Fallahi B, Mahgoli H. Determination of a Proper Covering Material for Fixture-Abutment Microleakage Evaluation Using Radiotracers and Gamma-Counter; A Pilot Study. J Iran Dent Assoc 2013; 25 (2) :62-67
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Volume 25, Issue 2 (4-2013) Back to browse issues page
Journal of Iranian Dental Association

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