Abstract
Objective
To compare the different restoration types of primary teeth to determine which type is appropriate for extensive caries of primary molars and incisors based on mechanical properties.
Materials and methods
A total of 160 primary teeth were evaluated in this study, including 80 incisors and 80 molars. Each category was divided into four groups: the control group, composite resin group, pre-veneered stainless steel crown (stainless steel crown) group, and zirconia crown group. Compressive strength test and fatigue strength test were performed.
Results
The compressive strength and fatigue strength of the composite resin group were significantly decreased compared with the control group (P < 0.05). The prefabricated crown groups showed increased fatigue and compressive strength compared with the control group, and the zirconia crown group was higher than that of the pre-veneered stainless steel crown group (P < 0.05). The zirconia crown group was less than the stainless steel crown group (P < 0.05) in the compressive strength but more than the stainless steel crown group (P < 0.05) in the fatigue strength.
Conclusions
The compressive strength and fatigue strength of crown restoration were superior to that of the composite resin filling. The fatigue strength of the zirconia crown also performed better than the pre-veneered stainless steel crown and the stainless steel crown. The compressive strength of the zirconia crown was less than that of the stainless steel crown.
Clinical relevance
The zirconia crown is a new restoration method for primary teeth that may be commonly applied in clinical practice.
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Acknowledgements
The authors gratefully acknowledge the State Key Laboratory of Military Stomatology of the Fourth Military Medical University.
Funding
This study was funded by the Independent Research Project of the State Key Laboratory of Military Stomatology (2019ZA06) and the Special Project of the National Clinical Research Center for Oral Diseases (LCA202010).
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All authors contributed to the study conception and design. Junhui Wang and Xiaojing Wang participated in all parts of the experiments. Baize Zhang participated in most of the experiments. Material preparation and data collection were performed by Yujiang Chen and Lulu Wang. The teeth used in the experiment were collected by Junhui Wang, Baize Zhang, Yujiang Chen, Lulu Wang, Yang Du, and Xiaojing Wang. The acquisition analysis and interpretation of data were performed by Junhui Wang and Baize Zhang. The first draft of the manuscript was written by Junhui Wang, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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This study was approved by the institutional research ethics committee at the Stomatological Hospital of the Fourth Military Medical University, China (Approval No. IRB-REV-2015020).
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The children’s parents/guardians were informed about the purpose of the study and inclusion of the extracted teeth in the research and provided written informed consent.
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The authors declare no competing interests.
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Wang, J., Zhang, B., Chen, Y. et al. A comparison of the mechanical proprieties of different types of primary tooth restorations: an in vitro study. Clin Oral Invest 26, 4419–4426 (2022). https://doi.org/10.1007/s00784-022-04404-1
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DOI: https://doi.org/10.1007/s00784-022-04404-1