Development of a 3D printable maxillofacial silicone: Part I. Optimization of polydimethylsiloxane chains and cross-linker concentration

Swati K. Jindal, Martyn Sherriff, Mark G. Waters, Trevor J. Coward

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Statement of problem Conventionally, maxillofacial prostheses are fabricated by hand carving the missing anatomic defect in wax and creating a mold into which pigmented silicone elastomer is placed. Digital technologies such as computer numerical control (CNC) milling and 3-dimensional (3D) printing have been used to prepare molds directly or indirectly into which a biocompatible pigmented silicone elastomer is placed. Purpose The purpose of this in vitro study was to develop a silicone elastomer by varying composition that could eventually be 3D printed directly without a mold to create facial/body prostheses. Material and methods The silicone was composed of polydimethylsiloxane (PDMS), filler, catalyst, and cross-linker. Four types of base silicone polymers were prepared with different PDMS molecular weight combinations with long, medium, and short chain length PDMS. The effect of the cross-linker (2.5% to 12.5%) content in these bases was assessed for the effect upon the mechanical properties of the elastomer. Ten readings were made for each formulation, and differences in the means were evaluated with a 2-way ANOVA (α=.05). Results Variations in silicone composition resulted in hardness from 6.8 to 28.5 durometer, tensile strength from 0.720 to 3.524 kNm−1 and tear strength from 0.954 to 8.484 MPa. Significant differences were observed among all formulations (P
LanguageEnglish
Pages617-622
JournalJournal of Prosthetic Dentistry
Volume116
Issue number4
Early online date4 May 2016
DOIs
Publication statusPublished - 31 Oct 2016

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Silicone Elastomers
Silicones
Fungi
Maxillofacial Prosthesis
Elastomers
Tensile Strength
Waxes
Hardness
Tears
Prostheses and Implants
Reading
Analysis of Variance
Polymers
Hand
Molecular Weight
Technology
baysilon

Cite this

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title = "Development of a 3D printable maxillofacial silicone: Part I. Optimization of polydimethylsiloxane chains and cross-linker concentration",
abstract = "Statement of problem Conventionally, maxillofacial prostheses are fabricated by hand carving the missing anatomic defect in wax and creating a mold into which pigmented silicone elastomer is placed. Digital technologies such as computer numerical control (CNC) milling and 3-dimensional (3D) printing have been used to prepare molds directly or indirectly into which a biocompatible pigmented silicone elastomer is placed. Purpose The purpose of this in vitro study was to develop a silicone elastomer by varying composition that could eventually be 3D printed directly without a mold to create facial/body prostheses. Material and methods The silicone was composed of polydimethylsiloxane (PDMS), filler, catalyst, and cross-linker. Four types of base silicone polymers were prepared with different PDMS molecular weight combinations with long, medium, and short chain length PDMS. The effect of the cross-linker (2.5{\%} to 12.5{\%}) content in these bases was assessed for the effect upon the mechanical properties of the elastomer. Ten readings were made for each formulation, and differences in the means were evaluated with a 2-way ANOVA (α=.05). Results Variations in silicone composition resulted in hardness from 6.8 to 28.5 durometer, tensile strength from 0.720 to 3.524 kNm−1 and tear strength from 0.954 to 8.484 MPa. Significant differences were observed among all formulations (P",
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Development of a 3D printable maxillofacial silicone: Part I. Optimization of polydimethylsiloxane chains and cross-linker concentration. / Jindal, Swati K.; Sherriff, Martyn; Waters, Mark G.; Coward, Trevor J.

In: Journal of Prosthetic Dentistry, Vol. 116, No. 4, 31.10.2016, p. 617-622.

Research output: Contribution to journalArticle

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AU - Jindal, Swati K.

AU - Sherriff, Martyn

AU - Waters, Mark G.

AU - Coward, Trevor J.

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N2 - Statement of problem Conventionally, maxillofacial prostheses are fabricated by hand carving the missing anatomic defect in wax and creating a mold into which pigmented silicone elastomer is placed. Digital technologies such as computer numerical control (CNC) milling and 3-dimensional (3D) printing have been used to prepare molds directly or indirectly into which a biocompatible pigmented silicone elastomer is placed. Purpose The purpose of this in vitro study was to develop a silicone elastomer by varying composition that could eventually be 3D printed directly without a mold to create facial/body prostheses. Material and methods The silicone was composed of polydimethylsiloxane (PDMS), filler, catalyst, and cross-linker. Four types of base silicone polymers were prepared with different PDMS molecular weight combinations with long, medium, and short chain length PDMS. The effect of the cross-linker (2.5% to 12.5%) content in these bases was assessed for the effect upon the mechanical properties of the elastomer. Ten readings were made for each formulation, and differences in the means were evaluated with a 2-way ANOVA (α=.05). Results Variations in silicone composition resulted in hardness from 6.8 to 28.5 durometer, tensile strength from 0.720 to 3.524 kNm−1 and tear strength from 0.954 to 8.484 MPa. Significant differences were observed among all formulations (P

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