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New organosilicon maxillofacial prosthetic materials
- Source :
-
Dental Materials . May2002, Vol. 18 Issue 3, p281. 6p. - Publication Year :
- 2002
-
Abstract
- Objectives: The silicone elastomer A-2186 is a widely used maxillofacial prosthetic material. It is a pourable two-component silicone rubber cured by a platinum catalyst. Used as a prosthetic material, A-2186 has short working time and because of its hydrophobic nature, poor adhesion to non-silicone based adhesives. The purpose of this study is to evaluate the physical properties of new prosthetic materials based on methacryloxypropyl-terminated polydimethylsiloxane (MPDS-MF), and to compare the properties with those of A-2186.Methods: Hardness, tensile strength, ultimate elongation, tear strength and adhesive bonding strength of MPDS-MF and A-2186 with and without additives were determined and compared. The bonding strengths of the extrinsic colorant carrier with the prosthetic materials were also determined. Statistical analyses were done using a two-way analysis of variance (ANOVA). For significant effects, post-hoc tests were done using the Bonferroni correction.Results: The hardness of MPDS-MF is similar to A-2186. However, tensile strength, tear strength, ultimate elongation, and adhesive bonding strength of MPDS-MF are higher than those of A-2186.Significance: MPDS-MF is cured by free radical thermal polymerization and crosslinking. The working time of MPDS-MF, unlike A-2186, is long. The presence of methacrylate groups in MPDS-MF enhances its adhesion to non-silicone based adhesive. Based on the present study, it appears that MPDS-MF is suitable for use in fabricating of clinical prostheses. [Copyright &y& Elsevier]
- Subjects :
- *MAXILLOFACIAL prosthesis
*ELASTOMERS
*PLATINUM catalysts
*PROSTHODONTICS
Subjects
Details
- Language :
- English
- ISSN :
- 01095641
- Volume :
- 18
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Dental Materials
- Publication Type :
- Academic Journal
- Accession number :
- 7749229
- Full Text :
- https://doi.org/10.1016/S0109-5641(01)00050-1