How Does the Color of Restorative Material Change during Exposure to Dietary Liquids Due to the Acquisition of a Discolored Layer?
, Wojciech Eliasz 3, Beata Czarnecka 4, Elżbieta Paszynska 1 and Marek Sikorski 5
Round 1
Reviewer 1 Report
In this manuscript, the authors reported how six dental materials were affected by different staining liquids. The following comments should be addressed.
Comments:
- Page 1, line 2: A mild suggestion, can authors use “affirmative sentence” to replace “interrogative sentence” as title.
- Page 1, line 8-10: Two first authors are affiliated in university so that the mails issued from Poznan University of Medical Sciences should be provided as other authors.
- Page 1, line 21: A comma is missing between (GC) and Filtek.
- Page 4, line 152: Is Table 4S provided or not?
- Page 5, lines 152, 178, 192, 206, 260, 274, 277, 305, and 350: For consistent, coca-cola should be replaced by “Coca-Cola.”
- Page 5, line 198: A period is missing between “currant juice” and “The color.”
- In Figure 1 to 11: If these experiments were performed in triplicate or more, please provide error bar.
- Page 7, line 273: Please move DE a little bit leftward.
- In Figure 2 to 11: Every “DL” of y-axis is not indicated, and “h” should be indicated in x-axis
- Page 7, line 280: The line “time” seems to be a typo.
- Page 13, line 341: slightly
- Page 13, lines 370-376: Please rewrite this paragraph.
Author Response
We would like to thank the Reviewer for all the valuable suggestions. We corrected all typographical errors and rewrote fragments that may seem unclear according to the suggestions (points 2, 3, 5, 8, 9-12). Also, e-mail addresses of all authors are now at a university *.edu.pl domain (point 2). The reference to Table 4S is also a typographical error ((the presented study is a fragment of a larger-scale study that included also prosthodontic materials) (point 4). Error bar, for clarity, is now provided in Fig. 1 for all samples (point 7).
Reviewer 2 Report
The manuscript entitled “How does the color of restorative material change during exposure to dietary liquids due to the acquisition of a discolored layer?” needs to be revised before it can be accepted for publication in “Coatings”. Some recommendations are as the following:
- The major problem with this manuscript is the lack of statistical analysis. The authors should indicate the number of replicates for the measurements and perform statistical analysis for the comparison of different treatments.
- Another point that is ignored is the digestive enzymes (i.e., α-amylase) that are released in the month in the presence of food materials, which may affect the results.
- The subsections of “results” can be rearranged. It would be better to discuss all color parameters for one sample at once.
- The conclusion can be extended. Please make recommendations based on your research outcomes.
Author Response
- The major problem with this manuscript is the lack of statistical analysis. The authors should indicate the number of replicates for the measurements and perform statistical analysis for the comparison of different treatments.
Response: We provided now statistical analysis for the ΔE parameter, as the most comprehensive one. Error bar is provided in the Figure, and p-values are presented for the end of the experiment, in order to provide a clear and comprehensible manner of presentation.
Another point that is ignored is the digestive enzymes (i.e., α-amylase) that are released in the month in the presence of food materials, which may affect the results.
Response: We added a point related to the presence of enzymes in discussion and conclusions, as it has been shown that enzymes may influence some color parameters that, in turn influence color stability.
- The subsections of “results” can be rearranged. It would be better to discuss all color parameters for one sample at once.
Response: We rearranged the results section according to the suggestion.
- The conclusion can be extended. Please make recommendations based on your research outcomes.
Response: Also, the conclusion has been extended and now includes a broader perspective with regard to future research directions and clinical performance of different materials.
Reviewer 3 Report
Line 42- use small letter for “one”
Line 63 – space needed
Line 75 remove the
Please state why the 6 dental materials were chosen? Based on what principle?
Line 102-103 – the staining times are not quite similar to reality. Maybe the authors will like to equivalate for example 1 h of exposure to daily consumption of one or more of the staining liquids.
Line 140 – point needed
Line 301-309 – this was stated before, is redundant
Line 306, 331 – point needed
Line 333 – the authors did not mention the polishing time as an influenced factor before this statement, nor included this variable in the study (compare polished vs not-polished material or compare different polishing periods, etc). You should add this as a recommendation for further studies and specify that this factor was not taken into account in this study.
Coca-Cola – please use the same format through the text
“in vitro” should be in italic
The “Author Contributions” is missing
Author Response
Line 42- use small letter for “one” , Line 63 – space needed , Line 75 remove the, 140 – point needed; Line 301-309 – this was stated before, is redundant; Line 306, 331 – point needed ; “in vitro” should be in italic; Coca-Cola – please use the same format through the text
Response: All these errors were corrected.
Please state why the 6 dental materials were chosen? Based on what principle?
Response: The materials that were chosen for the study included composite resin and compomer based materials that are widely used for esthetic restoration of dental hard tissues.. The study was designed in such way in order to include materials that may be suitable for restoration in aesthetic zones in all clinical scenarios, including not only the need for perfect color match (which is the property of composite resin materials), but also the location of the defect (e.g. subgingival cavities that constitute an indication for compomers), and the strength of the planned restoration.
Line 102-103 – the staining times are not quite similar to reality. Maybe the authors will like to equivalate for example 1 h of exposure to daily consumption of one or more of the staining liquids.
Response: The staining times were not randomly chosen, the authors decided to follow the methodology used for other research studies related to color stability of dental materials. The measurements for the majority of studies were performed after 24, 72, and 168 hours of staining, which is related to the designed longevity of the restoration. However, standardization of the results enables the study to be reviewed in broader context, such as e.g. meta analyses or systematic reviews.
Line 333 – the authors did not mention the polishing time as an influenced factor before this statement, nor included this variable in the study (compare polished vs not-polished material or compare different polishing periods, etc). You should add this as a recommendation for further studies and specify that this factor was not taken into account in this study.
Response: The issue of polishing and other porocedures is now included in discussion and conclusions, and Is also one of the points for further research.
The “Author Contributions” is missing
Response: It has been updated and is now correct.
Round 2
Reviewer 2 Report
The authors addressed the points that are raised by the reviewer. The manuscript is now improved and therefore may be accepted for publication.
Author Response
Thank you very much for checking the manuscript and for all comments.
Reviewer 3 Report
The paper looks much better!
The authors responded to all reviewer comments.
Still, slight modifications need to be done:
Line 24, 108 and 123 is Coca-ColaTM and in the rest of the text is just Coca-Cola
In the rest, the document seems ok.
Author Response
Thank you very much for checking the manuscript. We added the "®" symbol to Coca-Cola, as we checked that Coca-Cola is a registered trademark - now the name is the same throughout the whole text.
