Abstract
Objectives: Regardless of the cause, gap formation at the tooth-restoration interface may result in treatment failure; non-destructive assessment and monitoring of these defects are important. The aim of this in vitro study is to assess the tooth-restoration interface using a non-invasive technique; swept source optical coherence tomography (SS-OCT) and to confirm the findings with confocal laser scanning microscope (CLSM). Methods: Cylindrical class-I cavities (3 mm in diameter and 1.5 mm in depth) were prepared in the occlusal surface of human premolars. Each cavity was restored using an all-in-one adhesive system (Clearfil Tri-S Bond) and one of the three types of composites placed in bulk; Majesty Posterior, AP-X and Majesty LV (all by Kuraray Medical, Japan). Ten serial cross-sectional images of the whole restored cavity were obtained by SS-OCT at 1319 nm center wave length, to which locations the specimens were later trimmed, polished and observed under CLSM. An image analysis software was used to detect significant peaks in the signal intensity at the resin-dentin interface of the cavity floor. The presence and dimensions of gaps at the interface were also confirmed by CLSM. Results: Increased SS-OCT signal intensity along the interface corresponded well to the interfacial gaps detected by CLSM. The actual gap size detected ranged from 26 μm to 1.9 mm in length, and the universal composite APX showed lowest interfacial gaps. Conclusion: SS-OCT imaging technology can be used to non-invasively detect and quantify micrometer gaps at the bottom of composite restorations, and potentially become a monitoring tool for composite restorations both in the laboratory research, and in the clinics.
| Original language | English |
|---|---|
| Pages (from-to) | 915-925 |
| Number of pages | 11 |
| Journal | Dental Materials |
| Volume | 27 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - Sep 2011 |
| Externally published | Yes |
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Keywords
- Confocal laser scanning microscopy
- Gap
- Non-destructive testing
- Optical coherence tomography
- Resin composite
ASJC Scopus subject areas
- Dentistry(all)
- Materials Science(all)
- Mechanics of Materials
- Medicine(all)
Cite this
Non-invasive quantification of resin-dentin interfacial gaps using optical coherence tomography : Validation against confocal microscopy. / Bakhsh, Turki A.; Sadr, Alireza; Shimada, Yasushi; Tagami, Junji; Sumi, Yasunori.
In: Dental Materials, Vol. 27, No. 9, 09.2011, p. 915-925.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Non-invasive quantification of resin-dentin interfacial gaps using optical coherence tomography
T2 - Validation against confocal microscopy
AU - Bakhsh, Turki A.
AU - Sadr, Alireza
AU - Shimada, Yasushi
AU - Tagami, Junji
AU - Sumi, Yasunori
PY - 2011/9
Y1 - 2011/9
N2 - Objectives: Regardless of the cause, gap formation at the tooth-restoration interface may result in treatment failure; non-destructive assessment and monitoring of these defects are important. The aim of this in vitro study is to assess the tooth-restoration interface using a non-invasive technique; swept source optical coherence tomography (SS-OCT) and to confirm the findings with confocal laser scanning microscope (CLSM). Methods: Cylindrical class-I cavities (3 mm in diameter and 1.5 mm in depth) were prepared in the occlusal surface of human premolars. Each cavity was restored using an all-in-one adhesive system (Clearfil Tri-S Bond) and one of the three types of composites placed in bulk; Majesty Posterior, AP-X and Majesty LV (all by Kuraray Medical, Japan). Ten serial cross-sectional images of the whole restored cavity were obtained by SS-OCT at 1319 nm center wave length, to which locations the specimens were later trimmed, polished and observed under CLSM. An image analysis software was used to detect significant peaks in the signal intensity at the resin-dentin interface of the cavity floor. The presence and dimensions of gaps at the interface were also confirmed by CLSM. Results: Increased SS-OCT signal intensity along the interface corresponded well to the interfacial gaps detected by CLSM. The actual gap size detected ranged from 26 μm to 1.9 mm in length, and the universal composite APX showed lowest interfacial gaps. Conclusion: SS-OCT imaging technology can be used to non-invasively detect and quantify micrometer gaps at the bottom of composite restorations, and potentially become a monitoring tool for composite restorations both in the laboratory research, and in the clinics.
AB - Objectives: Regardless of the cause, gap formation at the tooth-restoration interface may result in treatment failure; non-destructive assessment and monitoring of these defects are important. The aim of this in vitro study is to assess the tooth-restoration interface using a non-invasive technique; swept source optical coherence tomography (SS-OCT) and to confirm the findings with confocal laser scanning microscope (CLSM). Methods: Cylindrical class-I cavities (3 mm in diameter and 1.5 mm in depth) were prepared in the occlusal surface of human premolars. Each cavity was restored using an all-in-one adhesive system (Clearfil Tri-S Bond) and one of the three types of composites placed in bulk; Majesty Posterior, AP-X and Majesty LV (all by Kuraray Medical, Japan). Ten serial cross-sectional images of the whole restored cavity were obtained by SS-OCT at 1319 nm center wave length, to which locations the specimens were later trimmed, polished and observed under CLSM. An image analysis software was used to detect significant peaks in the signal intensity at the resin-dentin interface of the cavity floor. The presence and dimensions of gaps at the interface were also confirmed by CLSM. Results: Increased SS-OCT signal intensity along the interface corresponded well to the interfacial gaps detected by CLSM. The actual gap size detected ranged from 26 μm to 1.9 mm in length, and the universal composite APX showed lowest interfacial gaps. Conclusion: SS-OCT imaging technology can be used to non-invasively detect and quantify micrometer gaps at the bottom of composite restorations, and potentially become a monitoring tool for composite restorations both in the laboratory research, and in the clinics.
KW - Confocal laser scanning microscopy
KW - Gap
KW - Non-destructive testing
KW - Optical coherence tomography
KW - Resin composite
UR - http://www.scopus.com/inward/record.url?scp=80051471240&partnerID=8YFLogxK
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U2 - 10.1016/j.dental.2011.05.003
DO - 10.1016/j.dental.2011.05.003
M3 - Article
VL - 27
SP - 915
EP - 925
JO - Dental Materials
JF - Dental Materials
SN - 0109-5641
IS - 9
ER -