Microleakage assessment of CAD-CAM Cobalt-Chrome and Zirconia abutments on a conical connection dental implant: A comparative in vitro study
Microleakage assessment of CAD-CAM Cobalt-Chrome and Zirconia abutments on a conical connection dental implant: A comparative in vitro study

Impacto

Downloads

Downloads per month over past year

Molinero Mourelle, Pedro and Roccuzzo, Andrea and Yilmaz, Burak and Lam, Walter Yu Hang and Pow, Edmond Ho Nang and Río Highsmith, Jaime del and Gómez Polo, Miguel Ángel (2022) Microleakage assessment of CAD-CAM Cobalt-Chrome and Zirconia abutments on a conical connection dental implant: A comparative in vitro study. Clinical Oral Implants Research, 33 (9). pp. 945-952. ISSN 0905-7161

[thumbnail of Clinical Oral Implants Res - 2022 - Molinero‐Mourelle - Microleakage assessment of CAD‐CAM Cobalt‐Chrome and Zirconia.pdf]
Preview
PDF
Creative Commons Attribution Non-commercial No Derivatives.

1MB

Official URL: https://doi.org/10.1111/clr.13973



Abstract

Objective: To assess the marginal and bacterial microleakage in zirconia and CADCAM or cast Co-Cr implant abutments.
Methods: Sixty-four conical connection implants with their respective abutments were divided into four groups (Co-Cr (milled, laser-sintered, and cast) and Zirconia (milled)). All specimens were subjected to a chewing simulation and thermocycling. After aging process, specimens were submerged in a 0.2% methylene blue solution with Porphyromonas gingivalis (P.g) for 48 h. The marginal microleakage was measured using a 40× optical microscopy at the internal part of the implant, and when positive microleakage was observed, a DNA isolation with a polymerase chain reaction (PCR) test was used. The microbiological assessment was based on colony forming units (CFUs).
Results: Thirty (47%) implant-abutments presented microleakage and the PCR was performed on those specimens (1 Zirconia, 1 Co-Cr milled, 14 Co-Cr laser-sintered and 14 cast). Seven specimens (1 Co-Cr laser-sintered and six cast) presented values below the PCR detection limit t (<100 CFUs). The lowest CFUs count occurred in the Co-Cr milled group (5.17E+02 CFUs/ml) followed by zirconia (7.70E+03 CFUs/ml). The Co-Cr cast (9.39E+03 CFUs/ml) and laser-sintered (2.4E+05 CFUs/ml) groups had higher bacterial count. The CFU count comparison performed between Co-Cr cast and laser-sintered resulted in a statistically significant differences in favor of Co-CrCL (p<.05).
Conclusions: The abutment material and fabrication technique affected the implantabutment microleakage. Although the CAD-CAM abutments presented favorable results, all tested groups presented microleakage.


Item Type:Article
Uncontrolled Keywords:dental implant abutment connection; dental implant abutment design; dental implants; implant supported dental prosthesis; microleakage; polymerase chain reaction
Subjects:Medical sciences > Dentistry
Medical sciences > Dentistry > Dental implants
Medical sciences > Dentistry > Dental implants
ID Code:74865
Deposited On:30 Sep 2022 08:22
Last Modified:30 Sep 2022 10:55

Origin of downloads

Repository Staff Only: item control page