New aesthetic in-house 3D-printed brackets: proof of concept and fundamental mechanical properties.
Prog Orthod
; 23(1): 6, 2022 Feb 21.
Article
em En
| MEDLINE
| ID: mdl-35187595
ABSTRACT
OBJECTIVES:
Three-dimensional (3D) printing technology is an emerging manufacturing process for many orthodontic appliances, and the aim of this study was to evaluate the mechanical properties of resin-based materials as alternatives for the in-house preparation of orthodontic brackets. MATERIAL ANDMETHODS:
Two types of 3D printed resins used for temporary (T) and permanent (P) crown fabrication were included in this study. Ten blocks from each resin were manufactured by a 3D printer and, after embedding them in acrylic resin, the samples were subjected to metallographic grinding and polishing, followed by instrumented indentation testing (IIT). Martens hardness (HM), indentation modulus (EIT), and elastic index (ηIT) were determined with a Vickers indenter recording force-indentation depth curves from each specimen. After calculating descriptive statistics, differences between material types were investigated with Wilcoxon rank sum test accounting for clustering of measurements within specimens at alpha = 5%.RESULTS:
No statistically significant differences in the mechanical properties of the two tested materials were seen HM median 279 N/mm2 (interquartile range [IQR] 275-287 N/mm2) for T and median 279 N/mm2 (IQR 270-285 N/mm2) for P (P value = 0.63); EIT median 5548 MPa (IQR 5425-5834 MPa) for T and median 5644 (IQR 5420-5850 MPa) for P (P value = 0.84); ηIT median 47.1% (46.0-47.7%) for T and median 46.0% (IQR 45.4-47.8%) for P (P value = 0.24).CONCLUSIONS:
Under the limitations of this study, it may be concluded that the mechanical properties of the two 3D printed resins tested are equal, and thus, no differences in their clinical performance are expected.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Estética Dentária
/
Fenômenos Mecânicos
Limite:
Humans
Idioma:
En
Revista:
Prog Orthod
Assunto da revista:
ODONTOLOGIA
Ano de publicação:
2022
Tipo de documento:
Article
País de afiliação:
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