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Turkish Journal of Medical Sciences

Abstract

Background/aim: This in vitro study aimed to evaluate and compare the retentive forces of novel nonmagnetic abutment designs developed as an alternative to conventional magnetic abutments for facial prostheses.Materials and methods: A plexiglass model was constructed and two extraoral implants were placed in these blocks in a parallel position. Nonmagnetic abutments made of titanium were fabricated and screwed onto the implants. The nonmagnetic systems represent a novel design and include two different abutment designs (Type 1 and Type 2) with silicone attachments. Retentive force values for three abutment types: Conventional Magnetic System (CMS), Nonmagnetic abutment Type 1 System (NMS1), and Nonmagnetic abutment Type 2 System (NMS2) were measured at 0th, 120th, 360th, 720th, and 1440th dislodging cycles using a test machine. Given the data's distribution characteristics, non-parametric tests were used for analysis. The Kruskal-Wallis test evaluated significant differences among groups, followed by Dunn's post-hoc test for specific group comparisons. The Friedman test compared the number of dislodging cycles for each group, and the Benjamini-Hochberg adjusted Wilcoxon sign-rank test was used for pairwise comparisons.Results: Both NMS1 and NMS2 groups exhibited significantly higher retentive forces compared to CMS for each of the same dislodging cycles (p<0.01). The NMS1 group showed the highest initial retentive force (9.98±0.89 N), followed by the NMS2 group (9.65±0.35 N), but this difference was not statistically significant. Significant differences in retention force values were observed among the three groups across the dislodging cycles (p<0.001). The lowest retentive force in the last dislodging cycle was observed in the CMS group (3.39±0.04 N). Additionally, the retention forces decreased in all groups with each increasing dislodging cycle.Conclusion: The two newly developed nonmagnetic systems displayed higher retentive forces compared to the magnetic systems and can be considered a viable alternative abutment option for facial prostheses.

Author ORCID Identifier

İREM SOZEN YANİKSÖZEN YANIK: 0000-0002-9420-7787

UFUK ADALİ: 0000-0001-6557-2841

JAMILA YASSINE: 0009-0006-8354-4653

FRANSIZKAFRANZİSKA SCHMIDTSCHMİDT: 0000-0003-4704-0467

WOLFGANG HANNAK: 0000-0001-5377-0453

BAHADIR ERSU: 0000-0003-2065-8064

DOI

10.55730/1300-0144.5953

Keywords

facial prostheses, implant, magnetic abutment, magnetic resonance Imaging, Nonmagnetic abutment

First Page

152

Last Page

160

Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

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