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Background: To evaluate tooth discoloration by newly developed calcium silicate-based materials, and to examine the pre-application of dentin bonding agent (DBA) for preventing discoloration caused by mineral trioxide aggregate (MTA).
Methods: The roots of 50 premolars were randomly divided into five groups (n=10) and cavities were prepared from resected root surfaces. MTA was placed in the cavities of teeth belonging to the ProRoot MTA (Pr) and RetroMTA (Rt) groups. For teeth belonging to the DBA + ProRoot MTA (B-Pr) and DBA + RetroMTA (B-Rt) groups, DBA was first applied to the cavities prior to the addition of MTA. Teeth in the control group were restored with composite resin only (i.e., without MTA). After 12 weeks, MTA was removed from the Pr and Rt teeth and bleaching agents were applied for 3 additional weeks. Color assessments were recorded at baseline, and 1, 4, and 12 weeks, as well as after bleaching.
Results: Following 12 weeks of MTA treatment, there was a significant difference between the discoloration in the Pr and B-Pr groups. However, no significant difference was observed between the Rt and B-Rt groups. Following bleaching, the color changes (ΔE values) of the Pr group were not significantly different from those of the B-Pr group. The difference of ΔE between the Rt group after internal bleaching and the B-Rt group also was not significant.
Conclusions: RetroMTA caused significantly less discoloration than ProRoot MTA. Pre-application of DBA prevented discoloration by ProRoot MTA. MTA discoloration was improved equally well between DBA pre-application and post-bleaching. Clinical Relevance Tooth discoloration by mineral trioxide aggregate (MTA) limits its use in esthetic region. The pre-application of dentin bonding agent (DBA) and the newly developed RetroMTA prevented discoloration caused by MTA, thus expanding its use in esthetic applications.
Keywords
MTA discoloration, dentin bonding agent, bleaching, ProRoot MTA, RetroMTA
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Peer Review Timeline
CURRENT STATUS: Published
View the published article at BMC Oral Health.
No community comments so far
Submission checks complete
On 26 May, 2020
Editorial decision: Accept
On 26 May, 2020
No comments provided
Editorial decision: Minor revision
On 21 May, 2020
Editor assigned
On 08 May, 2020
Editor invited
On 07 May, 2020
Submission checks complete
On 10 Jan, 2020
No comments provided
Editorial decision: Minor revision
On 04 May, 2020
Review #2 received
Received 03 May, 2020
Review #1 received
Received 25 Apr, 2020
Reviewer #1 agreed
On 13 Apr, 2020
Reviewer #2 agreed
On 13 Apr, 2020
Editor assigned
On 12 Apr, 2020
Reviewers invited
Invitations sent on 12 Apr, 2020
Submission checks complete
On 11 Apr, 2020
Editor invited
On 11 Apr, 2020
Version 1
Posted 13 Jan, 2020
No comments provided
Editorial decision: Major revision
On 11 Mar, 2020
Review #1 received
Received 17 Feb, 2020
Review #2 received
Received 09 Feb, 2020
Reviewer #2 agreed
On 26 Jan, 2020
Reviewer #1 agreed
On 22 Jan, 2020
Reviewers invited
Invitations sent on 18 Jan, 2020
Editor assigned
On 09 Jan, 2020
First submitted
On 08 Jan, 2020
Submission checks complete
On 08 Jan, 2020
Editor invited
On 08 Jan, 2020
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Dentistry
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See the published version of this preprint at BMC Oral Health.
This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research article
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Published
View the published article at BMC Oral Health.
No community comments so far
Submission checks complete
On 26 May, 2020
Editorial decision: Accept
On 26 May, 2020
No comments provided
Editorial decision: Minor revision
On 21 May, 2020
Editor assigned
On 08 May, 2020
Editor invited
On 07 May, 2020
Submission checks complete
On 10 Jan, 2020
No comments provided
Editorial decision: Minor revision
On 04 May, 2020
Review #2 received
Received 03 May, 2020
Review #1 received
Received 25 Apr, 2020
Reviewer #1 agreed
On 13 Apr, 2020
Reviewer #2 agreed
On 13 Apr, 2020
Editor assigned
On 12 Apr, 2020
Reviewers invited
Invitations sent on 12 Apr, 2020
Submission checks complete
On 11 Apr, 2020
Editor invited
On 11 Apr, 2020
Version 1
Posted 13 Jan, 2020
No comments provided
Editorial decision: Major revision
On 11 Mar, 2020
Review #1 received
Received 17 Feb, 2020
Review #2 received
Received 09 Feb, 2020
Reviewer #2 agreed
On 26 Jan, 2020
Reviewer #1 agreed
On 22 Jan, 2020
Reviewers invited
Invitations sent on 18 Jan, 2020
Editor assigned
On 09 Jan, 2020
First submitted
On 08 Jan, 2020
Submission checks complete
On 08 Jan, 2020
Editor invited
On 08 Jan, 2020
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Dentistry
License:
This work is licensed under a CC BY 4.0 License. Read Full License
View the published article at BMC Oral Health.
Background: To evaluate tooth discoloration by newly developed calcium silicate-based materials, and to examine the pre-application of dentin bonding agent (DBA) for preventing discoloration caused by mineral trioxide aggregate (MTA).
Methods: The roots of 50 premolars were randomly divided into five groups (n=10) and cavities were prepared from resected root surfaces. MTA was placed in the cavities of teeth belonging to the ProRoot MTA (Pr) and RetroMTA (Rt) groups. For teeth belonging to the DBA + ProRoot MTA (B-Pr) and DBA + RetroMTA (B-Rt) groups, DBA was first applied to the cavities prior to the addition of MTA. Teeth in the control group were restored with composite resin only (i.e., without MTA). After 12 weeks, MTA was removed from the Pr and Rt teeth and bleaching agents were applied for 3 additional weeks. Color assessments were recorded at baseline, and 1, 4, and 12 weeks, as well as after bleaching.
Results: Following 12 weeks of MTA treatment, there was a significant difference between the discoloration in the Pr and B-Pr groups. However, no significant difference was observed between the Rt and B-Rt groups. Following bleaching, the color changes (ΔE values) of the Pr group were not significantly different from those of the B-Pr group. The difference of ΔE between the Rt group after internal bleaching and the B-Rt group also was not significant.
Conclusions: RetroMTA caused significantly less discoloration than ProRoot MTA. Pre-application of DBA prevented discoloration by ProRoot MTA. MTA discoloration was improved equally well between DBA pre-application and post-bleaching. Clinical Relevance Tooth discoloration by mineral trioxide aggregate (MTA) limits its use in esthetic region. The pre-application of dentin bonding agent (DBA) and the newly developed RetroMTA prevented discoloration caused by MTA, thus expanding its use in esthetic applications.
Figure 1
Figure 2
Figure 3
Figure 4
This is a list of supplementary files associated with this preprint. Click to download.
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