Survival of severely compromised endodontically treated teeth restored with or without a fiber glass post
Abstract Objective The use of a fiber glass post (FGP) type and choice of FGP diameter to restore endodontically treated incisors without ferrule is controversial. This study evaluated survival rate and failure mode of severely compromised central incisors without ferrule rehabilitated using resin...
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| Format: | Article |
| Language: | English |
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University of São Paulo
2023-10-01
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| Series: | Journal of Applied Oral Science |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572023000100453&tlng=en |
| _version_ | 1797644572862447616 |
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| author | Maria Tereza Hordones RIBEIRO Gabriella de OLIVEIRA Helena Letícia Quirino de OLIVEIRA Lilibeth Carola Leyton MENDOZA Calebe de MELO Thiago Silva PERES Carlos José SOARES |
| author_facet | Maria Tereza Hordones RIBEIRO Gabriella de OLIVEIRA Helena Letícia Quirino de OLIVEIRA Lilibeth Carola Leyton MENDOZA Calebe de MELO Thiago Silva PERES Carlos José SOARES |
| author_sort | Maria Tereza Hordones RIBEIRO |
| collection | DOAJ |
| description | Abstract Objective The use of a fiber glass post (FGP) type and choice of FGP diameter to restore endodontically treated incisors without ferrule is controversial. This study evaluated survival rate and failure mode of severely compromised central incisors without ferrule rehabilitated using resin-based composite (RBC) with or without FGP with different diameters. Methodology A total of 60 decoronated bovine incisors without a ferrule were endodontically treated and prepared for 1.4, 1.6, and 1.8 mm diameter FGPs (Whitepost System DC 0.5, Fit 0.4, and DCE 0.5; FGM). Half of the teeth received FGPs cemented using dual-cure resin cement (Allcem Core; FGM), the other half were filled using only bulk-fill RBC (OPUS Bulk Fill; FGM). The crowns were directly restored with RBC. The roots were embedded in polystyrene resin and the periodontal ligament was simulated with polyether impression material. Fatigue testing was conducted under 5 Hz cyclic loading at 30 degrees to the incisal edge, beginning at 50 N (5,000 cycles) as a warmup. After, the load was increased 100 N every 15,000 cycles until fracture occurred. All specimens were subjected to transillumination, micro-CT analysis, and digital radiography before and after fatigue testing. Fracture mode was classified according to severity and repair potential. Data were analyzed with Kaplan-Meier survival test and post hoc log-rank test (α=0.05) for pairwise comparisons. Results Using FGP significantly increased the number of cycles to failure, irrespective of FGP diameters (p=0.001). The FGP diameters had no statistically significant effect on cycles to failure or failure mode. Conclusion Using FGP without ferrule improved survival rate of structurally severely compromised central incisors compared with rehabilitation without FGP. The diameter of the FGPs had no effect on the survival rate and failure mode. |
| first_indexed | 2024-03-11T14:32:33Z |
| format | Article |
| id | doaj.art-bd3237d614df431a972fb21845eb3041 |
| institution | Directory Open Access Journal |
| issn | 1678-7765 |
| language | English |
| last_indexed | 2024-03-11T14:32:33Z |
| publishDate | 2023-10-01 |
| publisher | University of São Paulo |
| record_format | Article |
| series | Journal of Applied Oral Science |
| spelling | doaj.art-bd3237d614df431a972fb21845eb30412023-10-31T07:45:28ZengUniversity of São PauloJournal of Applied Oral Science1678-77652023-10-013110.1590/1678-7757-2023-0241Survival of severely compromised endodontically treated teeth restored with or without a fiber glass postMaria Tereza Hordones RIBEIROhttps://orcid.org/0000-0002-5126-7931Gabriella de OLIVEIRAhttps://orcid.org/0000-0002-2581-185XHelena Letícia Quirino de OLIVEIRAhttps://orcid.org/0000-0002-1916-8589Lilibeth Carola Leyton MENDOZAhttps://orcid.org/0000-0003-1608-4299Calebe de MELOhttps://orcid.org/0000-0003-3263-5951Thiago Silva PEREShttps://orcid.org/0000-0002-8988-2614Carlos José SOAREShttps://orcid.org/0000-0002-8830-605XAbstract Objective The use of a fiber glass post (FGP) type and choice of FGP diameter to restore endodontically treated incisors without ferrule is controversial. This study evaluated survival rate and failure mode of severely compromised central incisors without ferrule rehabilitated using resin-based composite (RBC) with or without FGP with different diameters. Methodology A total of 60 decoronated bovine incisors without a ferrule were endodontically treated and prepared for 1.4, 1.6, and 1.8 mm diameter FGPs (Whitepost System DC 0.5, Fit 0.4, and DCE 0.5; FGM). Half of the teeth received FGPs cemented using dual-cure resin cement (Allcem Core; FGM), the other half were filled using only bulk-fill RBC (OPUS Bulk Fill; FGM). The crowns were directly restored with RBC. The roots were embedded in polystyrene resin and the periodontal ligament was simulated with polyether impression material. Fatigue testing was conducted under 5 Hz cyclic loading at 30 degrees to the incisal edge, beginning at 50 N (5,000 cycles) as a warmup. After, the load was increased 100 N every 15,000 cycles until fracture occurred. All specimens were subjected to transillumination, micro-CT analysis, and digital radiography before and after fatigue testing. Fracture mode was classified according to severity and repair potential. Data were analyzed with Kaplan-Meier survival test and post hoc log-rank test (α=0.05) for pairwise comparisons. Results Using FGP significantly increased the number of cycles to failure, irrespective of FGP diameters (p=0.001). The FGP diameters had no statistically significant effect on cycles to failure or failure mode. Conclusion Using FGP without ferrule improved survival rate of structurally severely compromised central incisors compared with rehabilitation without FGP. The diameter of the FGPs had no effect on the survival rate and failure mode.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572023000100453&tlng=enPost and core techniqueFatigueEndodontically-treated teethComposite resins |
| spellingShingle | Maria Tereza Hordones RIBEIRO Gabriella de OLIVEIRA Helena Letícia Quirino de OLIVEIRA Lilibeth Carola Leyton MENDOZA Calebe de MELO Thiago Silva PERES Carlos José SOARES Survival of severely compromised endodontically treated teeth restored with or without a fiber glass post Journal of Applied Oral Science Post and core technique Fatigue Endodontically-treated teeth Composite resins |
| title | Survival of severely compromised endodontically treated teeth restored with or without a fiber glass post |
| title_full | Survival of severely compromised endodontically treated teeth restored with or without a fiber glass post |
| title_fullStr | Survival of severely compromised endodontically treated teeth restored with or without a fiber glass post |
| title_full_unstemmed | Survival of severely compromised endodontically treated teeth restored with or without a fiber glass post |
| title_short | Survival of severely compromised endodontically treated teeth restored with or without a fiber glass post |
| title_sort | survival of severely compromised endodontically treated teeth restored with or without a fiber glass post |
| topic | Post and core technique Fatigue Endodontically-treated teeth Composite resins |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572023000100453&tlng=en |
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