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107492

Polymerization shrinkage of cured dental composites with different resin matrices

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Last updated: 22 Jan 2023

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Abstract

The purpose of this study was to evaluate the polymerization shrinkage of cured silorane based composite (FiltekTM P90) and methacrylate based composites (FiltekTM Z350XT) nanofilled and (FiltekTM Z250 XT) nanohybrid. A total of 45 specimens were prepared, they were divided into three main groups of 15 specimen for each according to the restorative material used (A); where “A1": Filtek p90, “A2": Filtek Z250XT and “A3": Filtek Z350XT. A rectangular glass slab was used for polymerization shrinkage measurements .The composite materials were condensed incrementally in the mold and covered with celluloid strip, then cured for 40 seconds by LED light curing.  Four reference points were marked, then the distance between top and bottom of the uncured material (thickness of the specimen) was measured at each reference point,then the thickness of the specimen was repeatedly measured at the same reference points giving the measurements of the cured samples. The measurements were recorded using digital microscope. Results: It was found that there were statistically significant differences in maximum polymerization shrinkage between the same shade of the three resin formulations. Conclusion: Silorane based composites polymerized through ring opening polymerization is considered an excellent alternative to Bis GMA based composites regarding to their low shrinkage and polymerization stresses.

DOI

10.21608/ajdsm.2017.107492

Volume

20

Article Issue

1

Related Issue

16276

Issue Date

2017-01-01

Receive Date

2020-08-13

Publish Date

2017-01-01

Page Start

71

Page End

75

Print ISSN

1110-6751

Online ISSN

2682-3314

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https://ajdsm.journals.ekb.eg/article_107492.html

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https://ajdsm.journals.ekb.eg/service?article_code=107492

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10

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Original Article

Type Code

848

Publication Type

Journal

Publication Title

Al-Azhar Journal of Dental Science

Publication Link

https://ajdsm.journals.ekb.eg/

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Article

Created At

22 Jan 2023