Unveiling the mechanical performance of partially replaced coronal restorations in root canal-treated teeth: an in-vitro study
Abstract Objectives To compare the mechanical performance of partially replaced (repaired) intra-coronal restorations to totally replaced ones in root canal-treated teeth. Methods Thirty maxillary second premolars were selected according to strict criteria, mounted on moulds, and had mesio-occluso-d...
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2024-12-01
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| Series: | BMC Oral Health |
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| Online Access: | https://doi.org/10.1186/s12903-024-05180-y |
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| author | Mohammed Turky Gianluca Plotino Nermin Alsayed Mahmoud |
| author_facet | Mohammed Turky Gianluca Plotino Nermin Alsayed Mahmoud |
| author_sort | Mohammed Turky |
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| description | Abstract Objectives To compare the mechanical performance of partially replaced (repaired) intra-coronal restorations to totally replaced ones in root canal-treated teeth. Methods Thirty maxillary second premolars were selected according to strict criteria, mounted on moulds, and had mesio-occluso-distal (MOD) cavities prepared. Resin composite restorative material was used to perform the initial restoration, followed by aging procedures using thermo-mechanical cycling fatigue to replicate six months of intraoral aging. The specimens were then randomly divided into two groups: a totally replaced restoration (TR) group (n = 15), which involved the preparation of a traditional endodontic access cavity after the complete removal of the pre-existing coronal filling; and a partially replaced restoration (PR) group (n = 15), which involved accessing the tooth through the pre-existing restoration without completely removing it. Root canal preparation and filling procedures were conducted, and the access cavity was sealed with a new resin composite restoration, followed by a new thermo-mechanical cycling aging procedure. Finally, the specimens were submitted to a static fracture test to measure specimen fracture strength and determine the failure mode pattern (repairable fracture or irreparable fracture). Chi-square and t-tests were used for statistical analysis. Results Significant differences between the groups regarding their mechanical resistance were found. The average failure load of the TR group was 1115.13 N and 1330.23 N in the PR group (p = 0.002). Regarding the failure modes, the TR group exhibited eight irreparable fractures, while the PR group had four (p = 0.136). Conclusions Partially replaced restorations presented higher fracture strength and led to fewer irreparable fractures when compared to totally replaced restorations in root canal-treated teeth. |
| format | Article |
| id | doaj-art-1e06aebe72da45f48a1542d9510a9934 |
| institution | Kabale University |
| issn | 1472-6831 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Oral Health |
| spelling | doaj-art-1e06aebe72da45f48a1542d9510a99342024-12-29T12:50:17ZengBMCBMC Oral Health1472-68312024-12-0124111110.1186/s12903-024-05180-yUnveiling the mechanical performance of partially replaced coronal restorations in root canal-treated teeth: an in-vitro studyMohammed Turky0Gianluca Plotino1Nermin Alsayed Mahmoud2Department of Endodontics, Faculty of Dentistry, Minia UniversityPrivate PracticeDepartment of Conservative Dentistry, Faculty of Dentistry, Minia UniversityAbstract Objectives To compare the mechanical performance of partially replaced (repaired) intra-coronal restorations to totally replaced ones in root canal-treated teeth. Methods Thirty maxillary second premolars were selected according to strict criteria, mounted on moulds, and had mesio-occluso-distal (MOD) cavities prepared. Resin composite restorative material was used to perform the initial restoration, followed by aging procedures using thermo-mechanical cycling fatigue to replicate six months of intraoral aging. The specimens were then randomly divided into two groups: a totally replaced restoration (TR) group (n = 15), which involved the preparation of a traditional endodontic access cavity after the complete removal of the pre-existing coronal filling; and a partially replaced restoration (PR) group (n = 15), which involved accessing the tooth through the pre-existing restoration without completely removing it. Root canal preparation and filling procedures were conducted, and the access cavity was sealed with a new resin composite restoration, followed by a new thermo-mechanical cycling aging procedure. Finally, the specimens were submitted to a static fracture test to measure specimen fracture strength and determine the failure mode pattern (repairable fracture or irreparable fracture). Chi-square and t-tests were used for statistical analysis. Results Significant differences between the groups regarding their mechanical resistance were found. The average failure load of the TR group was 1115.13 N and 1330.23 N in the PR group (p = 0.002). Regarding the failure modes, the TR group exhibited eight irreparable fractures, while the PR group had four (p = 0.136). Conclusions Partially replaced restorations presented higher fracture strength and led to fewer irreparable fractures when compared to totally replaced restorations in root canal-treated teeth.https://doi.org/10.1186/s12903-024-05180-yCompression fractureDental restoration failureEndodonticsMechanical stressPremolar |
| spellingShingle | Mohammed Turky Gianluca Plotino Nermin Alsayed Mahmoud Unveiling the mechanical performance of partially replaced coronal restorations in root canal-treated teeth: an in-vitro study BMC Oral Health Compression fracture Dental restoration failure Endodontics Mechanical stress Premolar |
| title | Unveiling the mechanical performance of partially replaced coronal restorations in root canal-treated teeth: an in-vitro study |
| title_full | Unveiling the mechanical performance of partially replaced coronal restorations in root canal-treated teeth: an in-vitro study |
| title_fullStr | Unveiling the mechanical performance of partially replaced coronal restorations in root canal-treated teeth: an in-vitro study |
| title_full_unstemmed | Unveiling the mechanical performance of partially replaced coronal restorations in root canal-treated teeth: an in-vitro study |
| title_short | Unveiling the mechanical performance of partially replaced coronal restorations in root canal-treated teeth: an in-vitro study |
| title_sort | unveiling the mechanical performance of partially replaced coronal restorations in root canal treated teeth an in vitro study |
| topic | Compression fracture Dental restoration failure Endodontics Mechanical stress Premolar |
| url | https://doi.org/10.1186/s12903-024-05180-y |
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