Impact of aging on the fracture strength of 3D-printed fixed implant prostheses: A comparative analysis of monolithic and bi-layer with or without fiber-reinforced composite frameworks

Renata Moreira Cançado; Adilson Sakuno; Franciele Floriani; Amirali Zandinejad; Cintia Helena Coury Saraceni; Elcio Magdalena Giovani; Alfredo Mikail Melo Mesquita

doi:10.1111/jopr.13988

$Impact of aging on the fracture strength of 3D-printed fixed implant prostheses: A comparative analysis of monolithic and bi-layer with or without fiber-reinforced composite frameworks$

Journal article

Peer reviewed

Impact of aging on the fracture strength of 3D-printed fixed implant prostheses: A comparative analysis of monolithic and bi-layer with or without fiber-reinforced composite frameworks

Renata Moreira Cançado, Adilson Sakuno, Franciele Floriani, Amirali Zandinejad, Cintia Helena Coury Saraceni, Elcio Magdalena Giovani and Alfredo Mikail Melo Mesquita

Journal of prosthodontics

11/28/2024

DOI: 10.1111/jopr.13988

PMID: 39610152

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Abstract

This study aims to evaluate the fracture strength of three-unit, implant-supported fixed dental prostheses (FDPs) constructed from 3D-printed resin. It compares structures with and without fiber-reinforced composite (FRC) frameworks under conditions that mimic artificial aging. Forty FDPs were fabricated and divided into two groups: monolithic (n = 20) and bi-layer (n = 20). The monolithic group (MG) consisted entirely of FDPs made from 3D-printed resin for permanent restorations, while the bi-layer group (BG) featured FDPs with an FRC framework veneered with the same 3D-printed resin. Each group was subdivided into two subgroups: one subjected to artificial aging (MTG, n = 10; BTG, n = 10), and the other served as the baseline control (n = 10). All subgroups underwent a mechanical bending test, applying a single load to failure using a universal testing machine. There was a statistically significant difference in fracture strength due to the presence of the FRC framework (p < 0.01). The framework became the FDP more resistant to load. The mean load to failure and standard deviations were as follows: MG 406.59N (±33.84), MTG 286.20N (±152.15), BG 1142N (±162.88), and BTG 945N (±211.52). Although no statistical differences in strength were observed between aged and nonaged subgroups, variations in failure patterns emerged, with the BG and BTG groups showing a predominance of failures compared to the MG. The inclusion of an FRC framework significantly enhanced the fracture strength of the FDPs. While the aging protocol did not alter the strength, failures predominantly occurred in the 3D-printed resin superstructure at the connectors. The highest rate of fractures occurred in the premolar connector.

Aging

dental prosthesis

flexural strength

fiberglass reinforced polymers post and core technique

CAD‐CAM

3D printing

digital technology

Details

Title: Subtitle: Impact of aging on the fracture strength of 3D-printed fixed implant prostheses: A comparative analysis of monolithic and bi-layer with or without fiber-reinforced composite frameworks
Creators: Renata Moreira Cançado - Universidade Paulista
Adilson Sakuno - Fundação Faculdade de Odontologia
Franciele Floriani - University of Iowa
Amirali Zandinejad - University of Rochester
Cintia Helena Coury Saraceni - Universidade Paulista
Elcio Magdalena Giovani - Universidade Paulista
Alfredo Mikail Melo Mesquita - Universidade Paulista
Resource Type: Journal article
Publication Details: Journal of prosthodontics
DOI: 10.1111/jopr.13988
PMID: 39610152
NLM abbreviation: J Prosthodont
ISSN: 1532-849X
eISSN: 1532-849X
Publisher: Wiley
Language: English
Electronic publication date: 11/28/2024
Academic Unit: Prosthodontics
Record Identifier: 9984752759302771

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