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. 2019 Jul;13(3):349-353.
doi: 10.1055/s-0039-1700662. Epub 2019 Dec 3.

Effect of Implant Platform Connection and Abutment Material on Removal Torque and Implant Hexagon Plastic Deformation

Paulo Henrique de Souza Pereira  1 , Marina Amaral  1 , Kusai Baroudi  1 , Rafael Pino Vitti  1 , Mohammad Zakaria Nassani  2 , Laís Regiane da Silva-Concílio  1
Affiliations

Effect of Implant Platform Connection and Abutment Material on Removal Torque and Implant Hexagon Plastic Deformation

Paulo Henrique de Souza Pereira et al. Eur J Dent. 2019 Jul.

Abstract

Objectives: The aim of this study was to evaluate the plastic deformation of the hexagonal connection, and the removal torque of the implant-abutment joint of two dental implants combined with internal or external hexagonal connection implants after mechanical cycling.

Materials and methods: Twenty-four dental implants were used in the study. Half of the implants had internal hexagonal connections (IH; Titamax II Plus) and the other half had external hexagonal connections (EH; Titamax Ti Ex). Four groups of two types of dental implant abutments (titanium: Ti, UCLA II Plus and zirconia: Zr, fabricated by CAD/CAM; n = 6) were investigated. The abutments received a metallic crown and the settings were submitted to mechanical cycling (MC; 106 cycles, axial load, 120N). The connection surface area was measured by scanning electron microscope (SEM) images. The removal torque was evaluated and the plastic deformation of the hexagonal surface of the implant was measured by comparing the images before and after MC.

Statistical analysis: Paired-t test was used to analyze the data statistically at a significance level of α = 0.05.

Results: The torque values decreased for all groups after MC, and the hexagonal surface area decreased due to plastic deformation for IH and EH associated with Zr abutments.

Conclusions: Zirconia abutments showed the worst plastic deformation of the implant connection surface and torque loosening when associated with IH implant.

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Conflict of interest statement

None declared.

Figures

Fig. 1
Fig. 1
SEM images of the implant hexagon surface of one sample from each group. ( A ) EH/Zr before mechanical cycling, ( B ) EH/Zr after mechanical cycling, ( C ) EH/Ti before mechanical cycling, ( D ) EH/Ti after mechanical cycling, ( E ) IH/Zr before mechanical cycling, ( F ) IH/Zr after mechanical cycling, ( G ) IH/Ti before mechanical cycling, (H) IH/Ti after mechanical cycling. SEM, scanning electron microscope.
See this image and copyright information in PMC

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