Int J Comput Dent. 2023 Jan 5;0(0):1-14. doi: 10.3290/j.ijcd.b3759607. Online ahead of print.
ABSTRACT
AIM: The aim of this in vitro study was the evaluation of the in-vitro performance and fracture force of 3D-printed anterior implant-supported temporary partial dentures (TPD) with different filler content.
MATERIALS AND METHODS: Identical anterior resin-based TPDs (tooth situation 11-13; n=8 per material) were 3D-printed of methacrylate resins with different filler content. A cartridge polymethacrylate (PMMA) material was used as a reference. After temporary cementation, combined thermal cycling and mechanical loading (TCML) was performed on all restorations to mimic clinical application. Behavior during TCML and fracture force was determined and failures were analyzed. Data were statistically investigated (Kolmogorov- Smirnov-test, one-way-ANOVA; post-hoc-Bonferroni, Kaplan-Meier-survival, α=0.05).
RESULT: Failure during TCML varied between three failures and total failure during loading time. Mean survival time varied between 93±206 x10³ cycles and 329±84 x10³ cycles. Significant different survival cycles between individual materials could be determined (Log Rank test Mantel Cox: Chi2 21,861, df =4, p<0.001). A correlation between filler level and survival cycles could be found (Pearson: 0.186, p=0.065). Fracture values of the surviving TPDs varied between 499 N and 835 N. Failures were characterized by fracture of the connector (n=24) followed by fractures at the abutment (n=10).
CONCLUSION: TDPs showed different filler-dependent survival. Individual 3D-printed materials provided comparable or even better performance than a standard cartridge system, and might be sufficient for temporary application of at least half a year.
PMID:36602785 | DOI:10.3290/j.ijcd.b3759607
