RT Journal Article
T1 Effect of Fabrication Technique on the Microgap of CAD/CAM Cobalt–Chrome and Zirconia Abutments on a Conical Connection Implant: An In Vitro Study
A1 Molinero Mourelle, Rocío
A1 Cascos Sánchez, Rocío
A1 Yilmaz, Burak
A1 Lam, Walter Yu Hang
A1 Pow, Edmond Ho Nang
A1 Río Highsmith, Jaime Del
A1 Gómez Polo, Miguel Ángel
AB The aim of this in vitro study was to investigate the microgaps at the implant–abutment interface when zirconia (Zr) and CAD/CAM or cast Co–Cr abutments were used. Methods: Sixtyfour conical connection implants and their abutments were divided into four groups (Co–Cr (milled, laser-sintered and castable) and Zirconia (milled)). After chewing simulation (300,000 cycles, under 200 N loads at 2 Hz at a 30◦ angle) and thermocycling (10,000 cycles, 5 to 50 ◦C, dwelling time 55 s), the implant–abutment microgap was measured 14 times at each of the four anatomical aspects on each specimen by using a scanning electron microscope (SEM). Kruskal–Wallis and pair-wise comparison were used to analyze the data (α = 0.05). Results: The SEM analysis revealed smaller microgaps with Co–Cr milled abutments (0.69–8.39 µm) followed by Zr abutments (0.12–6.57 µm), Co–Cr sintered (7.31–25.7 µm) and cast Co–Cr (1.68–85.97 µm). Statistically significant differences were found between milled and cast Co–Cr, milled and laser-sintered Co–Cr, and between Zr and cast and laser-sintered Co–Cr (p < 0.05). Conclusions: The material and the abutment fabrication technique affected the implant–abutment microgap magnitude. The Zr and the milled Co–Cr presented smallermicrogaps. Although the CAD/CAM abutments presented the most favorable values, all tested groups had microgaps within a range of 10 to 150 µm.
PB MDPI
YR 2021
FD 2021-04-30
LK https://hdl.handle.net/20.500.14352/87271
UL https://hdl.handle.net/20.500.14352/87271
LA eng
NO Molinero-Mourelle, P.; Cascos-Sanchez, R.; Yilmaz, B.; Lam, W.Y.H.; Pow, E.H.N.; Del Río Highsmith, J.; Gómez-Polo, M. Effect of Fabrication Technique on the Microgap of CAD/CAM Cobalt–Chrome and Zirconia Abutments on a Conical Connection Implant: An In Vitro Study. Materials 2021, 14, 2348. https://doi.org/ 10.3390/ma14092348
DS Docta Complutense
RD 8 abr 2025