Internal adaptation of composite restorations with or without an intermediate layer: Effect of polymerization shrinkage parameters of the layer material

Seung Hoon Han, Alireza Sadr, Yasushi Shimada, Junji Tagami, Sungho Park

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Objectives: The purpose of this study was to compare the internal adaptation of resin composite restorations in Class I cavities with or without an intermediate layer, and to identify the relationships between the internal adaptation and the polymerization shrinkage parameters of the layer material. Methods: Class I cavities prepared in human third molars were treated with a one-step self-etch adhesive (G-Premio Bond, GC). In the control group, Tetric-EvoCeram Bulk-Fill (TBF, Ivoclar Vivadent) was placed using the bulk-fill technique and then light-cured. In the experimental groups, six different layer materials (three flowable resin composites, two bulk-fill resin composites, and a resin-modified glass-ionomer) were applied to a 1.5-mm thickness and light-cured, which was followed by TBF filling. After thermo-cycling, internal adaptation was measured using swept-source optical coherence tomography (SS-OCT) imaging and compared in terms of high brightness percentage (HB%) to represent the microgap. Shrinkage strain (SS), flexural modulus (FM), and polymerization shrinkage stress of the intermediate layer-resin composite complex (PS) were measured for each material. The relationships among HB%, SS, FM, and PS were evaluated statistically. Results: Groups with an intermediate layer showed lower HB% than the control group. The HB% correlated with PS (Pearson's correlation: R2 = 0.883, p < 0.05), and the PS correlated with the product of SS and FM. Conclusion: Internal adaptation depended on the polymerization shrinkage stress of the intermediate layer-resin composite complex. Clinical significance: Bulk-fill resin composite, which can show low polymerization shrinkage stress, may be used as an intermediate layer for better internal adaptation.

Original languageEnglish
Pages (from-to)41-48
Number of pages8
JournalJournal of Dentistry
Volume80
DOIs
Publication statusPublished - 2019 Jan 1

Fingerprint

Composite Resins
Polymerization
Light
Control Groups
Third Molar
Optical Coherence Tomography
Adhesives

All Science Journal Classification (ASJC) codes

  • Dentistry(all)

Cite this

@article{01013545c5d94d1d814ec1f3b8ff6b32,
title = "Internal adaptation of composite restorations with or without an intermediate layer: Effect of polymerization shrinkage parameters of the layer material",
abstract = "Objectives: The purpose of this study was to compare the internal adaptation of resin composite restorations in Class I cavities with or without an intermediate layer, and to identify the relationships between the internal adaptation and the polymerization shrinkage parameters of the layer material. Methods: Class I cavities prepared in human third molars were treated with a one-step self-etch adhesive (G-Premio Bond, GC). In the control group, Tetric-EvoCeram Bulk-Fill (TBF, Ivoclar Vivadent) was placed using the bulk-fill technique and then light-cured. In the experimental groups, six different layer materials (three flowable resin composites, two bulk-fill resin composites, and a resin-modified glass-ionomer) were applied to a 1.5-mm thickness and light-cured, which was followed by TBF filling. After thermo-cycling, internal adaptation was measured using swept-source optical coherence tomography (SS-OCT) imaging and compared in terms of high brightness percentage (HB{\%}) to represent the microgap. Shrinkage strain (SS), flexural modulus (FM), and polymerization shrinkage stress of the intermediate layer-resin composite complex (PS) were measured for each material. The relationships among HB{\%}, SS, FM, and PS were evaluated statistically. Results: Groups with an intermediate layer showed lower HB{\%} than the control group. The HB{\%} correlated with PS (Pearson's correlation: R2 = 0.883, p < 0.05), and the PS correlated with the product of SS and FM. Conclusion: Internal adaptation depended on the polymerization shrinkage stress of the intermediate layer-resin composite complex. Clinical significance: Bulk-fill resin composite, which can show low polymerization shrinkage stress, may be used as an intermediate layer for better internal adaptation.",
author = "Han, {Seung Hoon} and Alireza Sadr and Yasushi Shimada and Junji Tagami and Sungho Park",
year = "2019",
month = "1",
day = "1",
doi = "10.1016/j.jdent.2018.10.013",
language = "English",
volume = "80",
pages = "41--48",
journal = "Journal of Dentistry",
issn = "0300-5712",
publisher = "Elsevier BV",

}

Internal adaptation of composite restorations with or without an intermediate layer : Effect of polymerization shrinkage parameters of the layer material. / Han, Seung Hoon; Sadr, Alireza; Shimada, Yasushi; Tagami, Junji; Park, Sungho.

In: Journal of Dentistry, Vol. 80, 01.01.2019, p. 41-48.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Internal adaptation of composite restorations with or without an intermediate layer

T2 - Effect of polymerization shrinkage parameters of the layer material

AU - Han, Seung Hoon

AU - Sadr, Alireza

AU - Shimada, Yasushi

AU - Tagami, Junji

AU - Park, Sungho

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Objectives: The purpose of this study was to compare the internal adaptation of resin composite restorations in Class I cavities with or without an intermediate layer, and to identify the relationships between the internal adaptation and the polymerization shrinkage parameters of the layer material. Methods: Class I cavities prepared in human third molars were treated with a one-step self-etch adhesive (G-Premio Bond, GC). In the control group, Tetric-EvoCeram Bulk-Fill (TBF, Ivoclar Vivadent) was placed using the bulk-fill technique and then light-cured. In the experimental groups, six different layer materials (three flowable resin composites, two bulk-fill resin composites, and a resin-modified glass-ionomer) were applied to a 1.5-mm thickness and light-cured, which was followed by TBF filling. After thermo-cycling, internal adaptation was measured using swept-source optical coherence tomography (SS-OCT) imaging and compared in terms of high brightness percentage (HB%) to represent the microgap. Shrinkage strain (SS), flexural modulus (FM), and polymerization shrinkage stress of the intermediate layer-resin composite complex (PS) were measured for each material. The relationships among HB%, SS, FM, and PS were evaluated statistically. Results: Groups with an intermediate layer showed lower HB% than the control group. The HB% correlated with PS (Pearson's correlation: R2 = 0.883, p < 0.05), and the PS correlated with the product of SS and FM. Conclusion: Internal adaptation depended on the polymerization shrinkage stress of the intermediate layer-resin composite complex. Clinical significance: Bulk-fill resin composite, which can show low polymerization shrinkage stress, may be used as an intermediate layer for better internal adaptation.

AB - Objectives: The purpose of this study was to compare the internal adaptation of resin composite restorations in Class I cavities with or without an intermediate layer, and to identify the relationships between the internal adaptation and the polymerization shrinkage parameters of the layer material. Methods: Class I cavities prepared in human third molars were treated with a one-step self-etch adhesive (G-Premio Bond, GC). In the control group, Tetric-EvoCeram Bulk-Fill (TBF, Ivoclar Vivadent) was placed using the bulk-fill technique and then light-cured. In the experimental groups, six different layer materials (three flowable resin composites, two bulk-fill resin composites, and a resin-modified glass-ionomer) were applied to a 1.5-mm thickness and light-cured, which was followed by TBF filling. After thermo-cycling, internal adaptation was measured using swept-source optical coherence tomography (SS-OCT) imaging and compared in terms of high brightness percentage (HB%) to represent the microgap. Shrinkage strain (SS), flexural modulus (FM), and polymerization shrinkage stress of the intermediate layer-resin composite complex (PS) were measured for each material. The relationships among HB%, SS, FM, and PS were evaluated statistically. Results: Groups with an intermediate layer showed lower HB% than the control group. The HB% correlated with PS (Pearson's correlation: R2 = 0.883, p < 0.05), and the PS correlated with the product of SS and FM. Conclusion: Internal adaptation depended on the polymerization shrinkage stress of the intermediate layer-resin composite complex. Clinical significance: Bulk-fill resin composite, which can show low polymerization shrinkage stress, may be used as an intermediate layer for better internal adaptation.

UR - http://www.scopus.com/inward/record.url?scp=85056741964&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85056741964&partnerID=8YFLogxK

U2 - 10.1016/j.jdent.2018.10.013

DO - 10.1016/j.jdent.2018.10.013

M3 - Article

C2 - 30391684

AN - SCOPUS:85056741964

VL - 80

SP - 41

EP - 48

JO - Journal of Dentistry

JF - Journal of Dentistry

SN - 0300-5712

ER -