Abstract
Objective This study compared internal adaptation of composites under different C-factors and examined the relationship between internal adaptation and polymerization shrinkage parameters. Methods Cylindrical cavities 3 mm in diameter were prepared in 100 human third molars in two depths: 4 mm high C-factor (H-CF) or 1 mm low C-factor (L-CF). After adhesive application (Clearfil SE One, Kuraray Noritake), the composite was placed in two increments in three subgroups: Filtek Supreme (FS, 3 M ESPE); Charisma Diamond (CD, Heraeus Kulzer); Amelogen Plus (AP, Ultradent); and as a single increment in two subgroups: Tetric EvoCeram Bulk Fill (TB, Ivoclar Vivadent) and Venus Bulk Fill (VB, Heraeus Kulzer). After thermo-mechanical load-cycles, imperfect margin percentage (%IM) was calculated using swept-source optical coherence tomography (SS-OCT) imaging. The relationships between %IM and linear shrinkage (LS) and shrinkage stress, measured under either zero-compliance (PS0) or compliance-allowed (PS) conditions were evaluated. Results The %IM was significantly different between H-CF and L-CF groups. The %IM in H-CF turned out to be as groups CD, FS ≤ TB < AP, VB. The %IM in L-CF showed as groups CD, TB ≤ FS, AP < VB. There were significant correlations between shrinkage parameters and %IM, except between PS0 and %IM in L-CF. Significance Internal adaptation in a high C-factor cavity was inferior to that in a low C-factor cavity for both conventional and bulk-filled composites. Internal adaptation, polymerization shrinkage, and stress were different among composite materials. Polymerization stress under the compliance-allowed condition showed significant correlations with internal adaptations in high and low C-factor cavities.
| Original language | English |
|---|---|
| Pages (from-to) | 1085-1094 |
| Number of pages | 10 |
| Journal | Dental Materials |
| Volume | 32 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2016 Sep 1 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Dentistry(all)
- Mechanics of Materials
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Internal adaptation of resin composites at two configurations : Influence of polymerization shrinkage and stress. / Han, Seung Hoon; Sadr, Alireza; Tagami, Junji; Park, Sungho.
In: Dental Materials, Vol. 32, No. 9, 01.09.2016, p. 1085-1094.Research output: Contribution to journal › Article
TY - JOUR
T1 - Internal adaptation of resin composites at two configurations
T2 - Influence of polymerization shrinkage and stress
AU - Han, Seung Hoon
AU - Sadr, Alireza
AU - Tagami, Junji
AU - Park, Sungho
PY - 2016/9/1
Y1 - 2016/9/1
N2 - Objective This study compared internal adaptation of composites under different C-factors and examined the relationship between internal adaptation and polymerization shrinkage parameters. Methods Cylindrical cavities 3 mm in diameter were prepared in 100 human third molars in two depths: 4 mm high C-factor (H-CF) or 1 mm low C-factor (L-CF). After adhesive application (Clearfil SE One, Kuraray Noritake), the composite was placed in two increments in three subgroups: Filtek Supreme (FS, 3 M ESPE); Charisma Diamond (CD, Heraeus Kulzer); Amelogen Plus (AP, Ultradent); and as a single increment in two subgroups: Tetric EvoCeram Bulk Fill (TB, Ivoclar Vivadent) and Venus Bulk Fill (VB, Heraeus Kulzer). After thermo-mechanical load-cycles, imperfect margin percentage (%IM) was calculated using swept-source optical coherence tomography (SS-OCT) imaging. The relationships between %IM and linear shrinkage (LS) and shrinkage stress, measured under either zero-compliance (PS0) or compliance-allowed (PS) conditions were evaluated. Results The %IM was significantly different between H-CF and L-CF groups. The %IM in H-CF turned out to be as groups CD, FS ≤ TB < AP, VB. The %IM in L-CF showed as groups CD, TB ≤ FS, AP < VB. There were significant correlations between shrinkage parameters and %IM, except between PS0 and %IM in L-CF. Significance Internal adaptation in a high C-factor cavity was inferior to that in a low C-factor cavity for both conventional and bulk-filled composites. Internal adaptation, polymerization shrinkage, and stress were different among composite materials. Polymerization stress under the compliance-allowed condition showed significant correlations with internal adaptations in high and low C-factor cavities.
AB - Objective This study compared internal adaptation of composites under different C-factors and examined the relationship between internal adaptation and polymerization shrinkage parameters. Methods Cylindrical cavities 3 mm in diameter were prepared in 100 human third molars in two depths: 4 mm high C-factor (H-CF) or 1 mm low C-factor (L-CF). After adhesive application (Clearfil SE One, Kuraray Noritake), the composite was placed in two increments in three subgroups: Filtek Supreme (FS, 3 M ESPE); Charisma Diamond (CD, Heraeus Kulzer); Amelogen Plus (AP, Ultradent); and as a single increment in two subgroups: Tetric EvoCeram Bulk Fill (TB, Ivoclar Vivadent) and Venus Bulk Fill (VB, Heraeus Kulzer). After thermo-mechanical load-cycles, imperfect margin percentage (%IM) was calculated using swept-source optical coherence tomography (SS-OCT) imaging. The relationships between %IM and linear shrinkage (LS) and shrinkage stress, measured under either zero-compliance (PS0) or compliance-allowed (PS) conditions were evaluated. Results The %IM was significantly different between H-CF and L-CF groups. The %IM in H-CF turned out to be as groups CD, FS ≤ TB < AP, VB. The %IM in L-CF showed as groups CD, TB ≤ FS, AP < VB. There were significant correlations between shrinkage parameters and %IM, except between PS0 and %IM in L-CF. Significance Internal adaptation in a high C-factor cavity was inferior to that in a low C-factor cavity for both conventional and bulk-filled composites. Internal adaptation, polymerization shrinkage, and stress were different among composite materials. Polymerization stress under the compliance-allowed condition showed significant correlations with internal adaptations in high and low C-factor cavities.
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UR - http://www.scopus.com/inward/citedby.url?scp=84978388577&partnerID=8YFLogxK
U2 - 10.1016/j.dental.2016.06.005
DO - 10.1016/j.dental.2016.06.005
M3 - Article
C2 - 27372237
AN - SCOPUS:84978388577
VL - 32
SP - 1085
EP - 1094
JO - Dental Materials
JF - Dental Materials
SN - 0109-5641
IS - 9
ER -