Finite element analysis of a novel 3D-printed temporary fixed prosthesis for edentulous jaws under multidirectional loading

doi:10.12337/zgkqzzxzz.2025.04.007

Abstract

Abstract: Objective This study aimed to investigate the biomechanical properties of a novel 3D-printed temporary fixed denture for edentulous jaws using finite element analysis, and to compare its mechanical performance with that of conventional non-3D-printed polyetheretherketone (PEEK) and 3D-printed polylactic acid (PLA). Methods A three-dimensional finite element model of a mandible with complete edentulism was established based on a patient treated with an implant-supported temporary fixed prosthesis at Hangzhou Stomatological Hospital (Pinghai Campus) in May 2024. Three materials were analyzed: polyetheretherketone (PEEK, A1), polylactic acid (PLA, A2), and 3D-printed light-curing temporary crown and bridge resin for additive manufacturing (A3). A static load of 150 N was applied to anterior and posterior crowns and bridges in eight different directions: vertical load on posterior teeth (G1), right posterior buccal-to-lingual load (G2), right posterior lingual-to-buccal load (G3), left posterior buccal-to-lingual load (G4), left posterior lingual-to-buccal load (G5), vertical load on anterior teeth (G6), anterior labial-to-lingual load (G7), and anterior lingual-to-labial load( G8). Finite element analyses were performed using ANSYS 2021 R1 to evaluate the maximum Von Mises stress (MPa), maximum total deformation (mm), maximum Von Mises strain (mm), and stress distribution maps for each material. Results ①The maximum Von Mises stress of A1 (PEEK) was lower than A2 (PLA) in all directions, and A3 exhibited lower Von Mises stress than A2 in five directions.② A3 demonstrated lower maximum total deformation and Von Mises strain than A1 and A2 in seven directions; however, in direction G6 (vertical load on anterior teeth), A3 exhibited the largest total deformation and Von Mises strain. ③For anterior loading, the greatest deformation was concentrated at the incisal edge, with Von Mises strain evenly distributed across the anterior teeth and stress concentrated around the connector of the prosthesis.④For posterior loading, the greatest deformation was located at the distal margin of the mandibular second molar, with relatively uniform strain distribution in posterior regions, and peak stress located at the implant-abutment connection. Conclusion The novel 3D-printed temporary fixed denture for edentulous jaws demonstrated partially superior mechanical properties compared to both PEEK and PLA materials under simulated functional loading.

Key words: Oral implant, Finite element analysis, Temporary fixed prosthesis, Edentulous jaw, 3D printing

Zhang Chuankai, Zhang Jiayuan, Pan Yulei, Chen Qingsheng, Lin Haiyan. Finite element analysis of a novel 3D-printed temporary fixed prosthesis for edentulous jaws under multidirectional loading[J]. Chinese Journal of Oral Implantology, 2025, 30(2): 135-143.

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