Authors
Amr Mohammed Hussein Elmesery, Amany Mohammed Korsel, Waleed Elshahawy
Published in
BMC oral health. Volume 25. Issue 1. Pages 738. May 20, 2025. Epub May 20, 2025.
Abstract
The marginal fit and force-damping response of implant-supported restorations play critical roles in the long-term success of dental implants. This study evaluates the effect of implant abutment materials- resin-ceramic material, lithium disilicate, PEEK, and Titanium- on implant-supported restorations' marginal fit and force-damping response. The study offers novel insights into stress distribution and marginal gaps, aiming to optimize implant-supported restoration outcomes.
Forty implant abutments were divided into four equal groups: Shofu HC, Tessera, BioHPP, and Titanium. Vertical marginal gap measurements were taken using a digital microscope before and after Cementation, and force damping was assessed using a custom impact test machine. Non-metal abutments were custom-fabricated using STL files and a CAD/CAM machine (CEREC MC X5, Dentsply Sirona) for Tessera (MT/LT-BL2), Shofu HC Block (A3-LT/M), a resin hybrid ceramic (61% zirconium silicate, 39% nano-filler composite), and BioHPP (bredent GmbH & Co KG). Quantitative data were expressed as mean ± SD and analyzed using ANOVA with post hoc Tukey test. Normality was confirmed with the Shapiro-Wilk test, and differences between groups were assessed with an unpaired Student's t-test.
Before Cementation, the Biohpp group demonstrated the highest marginal gap (35.49 ± 2.31 µm), followed by Titanium (31.05 ± 1.87 µm) and Shofu HC Block (29.35 ± 1.72 µm). Tessera exhibited the lowest marginal gap (23.70 ± 2.99 µm) (P < 0.001). After Cementation, marginal gaps increased across all groups, with Biohpp (46.47 ± 3.10 µm) and Titanium (38.43 ± 2.25 µm) showing the most significant gaps, while Tessera continued to demonstrate the lowest (30.80 ± 1.64 µm) (P < 0.001). In force damping tests, Shofu HC Block recorded the lowest impact force (0.804 ± 0.034 N), followed by Biohpp (0.866 ± 0.027 N) and Tessera (0.920 ± 0.029 N). Titanium exhibited the highest force (0.970 ± 0.033 N), with all results showing statistical significance (P < 0.001).
Lithium disilicate exhibited the smallest marginal gap before and after Cementation, while PEEK showed the largest, followed by Titanium and resin-ceramic material. Resin-ceramic material had the highest shock absorption for force damping, followed by PEEK and Lithium disilicate, while Titanium recorded the highest impact force, indicating the least damping ability.
PMID:
40389955
Bibliographic data and abstract were imported from PubMed on 20 May 2025.
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