Resistencia a la fractura de postes de fibra de vidrio vs postes colados en la rehabilitación de dientes posteriores tratados endodónticamente. Revisión bibliográfica
An endodontically treated tooth is usually structurally weakened by the loss of tooth tissue that has resulted from previous restorations, caries, and preparation for access to endodontic therapy. Consequently, a pulpless tooth requires a restoration process that preserves and protects the remaining...
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| Formatua: | bachelorThesis |
| Hizkuntza: | spa |
| Argitaratua: |
2023
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| Gaiak: | |
| Sarrera elektronikoa: | https://dspace.unl.edu.ec/jspui/handle/123456789/27524 |
| Etiketak: |
Etiketa erantsi
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Etiketa erantsi | Gaia: | An endodontically treated tooth is usually structurally weakened by the loss of tooth tissue that has resulted from previous restorations, caries, and preparation for access to endodontic therapy. Consequently, a pulpless tooth requires a restoration process that preserves and protects the remaining tooth structure. One of the alternatives for its treatment is mainly based on implanting intra-radicular posts in its canal. To delve deeper into the subject, we analyzed the fracture resistance of fiberglass posts and cast posts used in the rehabilitative treatment of endodontically treated posterior teeth employing a literature review of 25 articles published in PubMed, Science Direct, Google Academic, Scielo, Elsevier, Medi graphic databases, as of 2017. The results show that both posts complied with the ISO 10477 Norm, which states that the minimum fracture toughness in Mpa (megapascals) of fiber posts is 856 MPa, and the ISO 22674 standard corresponding to metals is 860 MPa. Thus, 100% of the fiberglass poles have a flexural strength of 1000 to 10999 MPa; the cobalt-chromium poles (9.1%) of all the cast poles have strength values of 5000 to 6999 MPa; the copper- aluminum alloy poles (36.4%) have a value of 11000-12999 MPa; and above these, showing superiority in strength of all the fiberglass poles, the cobalt-chromium poles (9.1%) of all the cast poles have strength values of 5000 to 6999 MPa; the copper-aluminum alloy poles (36.4%) have a value of 11000-12999 MPa; and above these, showing superiority in strength of all the cast poles and fiberglass poles; those of copper-aluminum alloys (36.4 %) a value of 11000-12999 Mpa; and above these, showing superiority in strength of all the cast poles and fiberglass, the nickel-chromium alloys by reporting 9.1 % a higher value of 15000-16000 Mpa. In conclusion, the cast poles with the nickel-chromium alloy had a higher fracture resistance (15536 Mpa) (9%) than the fiberglass poles (10251 Mpa) (28.6 %). On the other hand, the fiberglass posts are a biocompatible treatment option with the remaining dental tissue as they present a modulus of elasticity (40 Gpa) like that of dentin (18 Gpa). And the cast posts have a high resistance to fracture (15536 Mpa). However, the considerable stress generated on the tooth surfaces due to its high modulus of elasticity (205 Gpa) makes the tooth prone to cause root fractures |
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