Fracture strengths of the abutments with concave emergence profile
Makaleler > Tam Makale · 2024
Yazarlar: Fatma Ersil, Ayse Sule Nazligul, Muharrem Erhan ÇÖMLEKOĞLU, Mehmet SONUGELEN
International Dental Journal, Uluslararası, Wos, 2024, cilt 74, ss S365-S365
DOI: 10.1016/j.identj.2024.07.482
Özet
To investigate the effect of thinning the abutment neck to allow more space for soft tissue at the implant-abutment junction to the fracture strength of zirconia, lithium disilicate and polyether ether ketone (PEEK) materials. Fifteen abutment crowns with concave emergence profile were digitally fabricated from each material group (zirconia (IPS e.max ZirCAD LT), PEEK (Whitepeaks, Cobrapeek Medium) and lithium disilicate (IPS e.max CAD). The abutment crowns were cemented on Ti-bases with a dual-curing luting cement (Calibra Universal Self Adhesive Cement). The specimens were tested for fracture strength with a universal testing machine (Autograph, Shimadzu) using Trapezium X software. A fractographic analysis was made. The location of the fractures on the designs and their decementation status were recorded. The data (N±SD) were statistically analyzed (α=0.05, One-way ANOVA, Tukey HSD, SPSS 21.0). Screw and/or material fracture was observed at 2073.50 N,1773.25 N, for zirconia, and lithium disilicate, respectively while decementation was observed at 1227.50 N and screw fracture at 1100 N for PEEK. The differences between the control (1535,07± 409,5), zirconia, lithium disilicate and PEEK were significant (p=0,00). The differences between experimental groups were insignificant. PEEK was the most suitable material for the concave emergence profile design.