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Meta-Analysis
. 2021 Apr-Jun;21(2):138-149.
doi: 10.4103/jips.jips_253_19.

The color stability of maxillofacial silicones: A systematic review and meta analysis

Priya Gupta  1 , Saee Deshpande  2 , Usha Radke  1 , Suresh Ughade  3 , Rajesh Sethuraman  4
Affiliations
Meta-Analysis

The color stability of maxillofacial silicones: A systematic review and meta analysis

Priya Gupta et al. J Indian Prosthodont Soc. 2021 Apr-Jun.

Abstract

Aim: This systematic review aims to identify and interpret results of studies that evaluated the changes in the color stability of maxillofacial prosthetic materials due to chemical instability of silicones and pigments and the effect of exposure to environmental conditions and aging factors on the same.

Settings and design: This systematic review was conducted in accordance with the Preferred Reporting Items for Systematic reviews and Meta-Analyses guidelines (PRISMA).

Materials and methods: Relevant articles written in English only, before November 15, 2019, were identified using an electronic search in the PubMed/Medline conducted to identify pertinent articles. The relevancy of the articles was verified by screening the title, abstract, and full text, if they met the inclusion criteria. A total of 42 articles satisfied the criteria, from which data were extracted for qualitative synthesis. This review protocol was registered in the International Prospective Register of Systematic Reviews (PROSPERO registration number CRD42019124562).

Statistical analysis used: Since considerable data heterogenicity was present in all studies except the ones on incorporation of TiO2 for which meta-analysis using random effects model was performed.

Results: The database search resulted in 234 studies, of which 202 articles were excluded due to lack of relevance, duplication, and unavailability of data. The remaining 32 fulltext articles were assessed for eligibility, out of which 2 articles were excluded. Twelve articles were yielded by manual search. A total of 42 studies were included in the present systematic review. Due to heterogeneous data, meta-analysis could be only carried out with the effect of TiO2 nano particle on color stability.

Conclusions: Although there has been extensive amount of research in this field, an ideal maxillofacial silicone exhibiting good color stability in various human and environmental aging conditions is yet to be identified. Human and environmental aging conditions have an adverse effect on the color stability and addition of TiO2 nano particle seems to improve the same.

Keywords: Accelerated aging; aging; color stability; dust; maxillofacial silicones; nanoparticle; silicone elastomers; sweat; weathering.

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Conflict of interest statement

None

Figures

Figure 1
Figure 1
Article selection Preferred Reporting Items for Systematic Reviews and Meta-analyses flowchart based on inclusion and exclusion criteria
Figure 2
Figure 2
Forest plot showing summary of standardized mean difference from fixed effect model and Random effect model
See this image and copyright information in PMC

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