Marginal Discrepancy of Cast Copings to Abutments with Three Different Luting Agents. (2nd September 2019)

• Record Type: Journal Article
• Authors: Rosas, José; Mayta-Tovalino, Frank; Guerrero, Maria Eugenia; Tinedo-López, Pedro Luis; Delgado, Claudia; Ccahuana-Vasquez, Vanessa Z.
• Other Names: Lagravere Manuel Academic Editor.
• Is Part Of: International journal of dentistry. Volume 2019(2019)
• Publication Date: 2019-09-02
• Subjects: Dentistry -- Periodicals; Dentistry; Dentistry -- Periodicals; Electronic journals; Periodicals; 617.6
• DOI: 10.1155/2019/8657582
• Languages: English
• ISSNs: 1687-8728

Abstract

Abstract : Aim . The purpose of this study was to evaluate the MD (marginal discrepancy) on the calcinable copings in abutments for cemented prostheses with three luting agents. Methods . Sixty-four analogs of CeraOne-type abutments (NACONIH code, Titanium Fix Implant Sytem SP, Brazil) were divided into four groups ( n = 16). The copings were cast and placed on the CeraOne abutment analogs and cemented with eugenol-free zinc oxide (EfZO) ( n = 16), with glass ionomer (GI) ( n = 16), and with zinc phosphate (ZP) ( n = 16), and as a control group, there were CeraOne plastic copings (NACOC code, Titanium Fix Implant Sytem SP, Brazil) ( n = 16) which were not cemented with any material. After 24 hours, the MD of the four groups was measured. MD was evaluated using a stereoscopic microscope (Leica EZ4 W, Leica Microsystems, Germany) with an increase of ×100. MD was measured at four predetermined and equidistant sites with respect to the marginal line of the cast adaptation. The measurement was made from the distance between the free edge of the cast cylinder and the margin of preparation of the titanium abutment, with a level of statistical significance ofp < 0.05 . Results . Of the three fixing agents, the ZP was found to have the highest MD (53.59 ± 14.21 μ m); however, the lowest MD (41.72 ± 9.10 μ m) was found in the GI group. These differences are statistically significant atp < 0.001 . Conclusions . In summary, according to our results, it was found that ZP cement showed the highest MD after cementation, followed by the glass ionomer, while EfZO showed the lowest MD.