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Effect of post-processing on the mechanical properties of polymers printed by the fused filament fabrication method used as prosthodontic materials and dental biomaterials: a systematic review

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Abstract

Additive manufacturing offers several advantages such as accuracy, agility, and ability to customize parts with different geometries and complexities. However, this method has a disadvantage the poor adhesion between the layers resulting from the printing process, which leads to inferior mechanical properties of the materials printed by this technique. Thus, using strategies that improve these properties is beneficial for application in materials used in prostheses and biomaterials. However, there is still no consensus in the literature on the best method and how to perform it. The aim of this systematic review was to evaluate the post-processing methods used to improve the mechanical properties of polymers printed by the fused filament fabrication method. This systematic review is in accordance with the Preferred Reporting Items for Systematic Review and Meta-Analysis guidelines, and it was registered with the Open Science Framework (OSF) (https://osf.io/ckn6y). PubMed, Science Direct, EMBASE, and Scopus were the databases used in the search. Articles were selected by two independent reviewers according to the inclusion criteria. The risk of bias was analyzed by using the Joanna Briggs Institute adapted quasi-experimental study evaluation tool. The studies included in the present review point to the improvement in the mechanical properties of printed polymers when submitted to different types of post-processing. Post-processing was beneficial for polymers printed by the FFF technique. Thermal post-processing improves the mechanical properties of both semi-crystalline and amorphous polymers. The crystallinity and viscosity had a significant influence on mechanical properties. Chemical and mechanical post-processing improves surface roughness. However, the mechanical method does not apply to complex geometries.

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  1. Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo (USP), Av. Do Café, S/N 14040-904, Ribeirão Preto, SP, Brazil

    Murilo R. de Campos & Andréa C. dos Reis

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de Campos, M.R., dos Reis, A.C. Effect of post-processing on the mechanical properties of polymers printed by the fused filament fabrication method used as prosthodontic materials and dental biomaterials: a systematic review. Polym. Bull. 81, 2001–2021 (2024). https://doi.org/10.1007/s00289-023-04816-3

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