Flexural modulus, flexural strength, and stiffness of fiber-reinforced posts
<b>Background: </b> The radiopacity degree of posts is not enough for adequate visualization during radiographic analyses. Glass fiber post with stainless steel reinforcement has been fabricated in an attempt to overcome this limitation. <b> Aim: </b> This study was designed...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wolters Kluwer Medknow Publications
2009-01-01
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| Series: | Indian Journal of Dental Research |
| Subjects: | |
| Online Access: | http://www.ijdr.in/article.asp?issn=0970-9290;year=2009;volume=20;issue=3;spage=277;epage=281;aulast=Novais |
| _version_ | 1818206651029651456 |
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| author | Novais Veridiana Quagliatto Paulo Bona Alvaro Correr-Sobrinho Lourenco Soares Carlos |
| author_facet | Novais Veridiana Quagliatto Paulo Bona Alvaro Correr-Sobrinho Lourenco Soares Carlos |
| author_sort | Novais Veridiana |
| collection | DOAJ |
| description | <b>Background: </b> The radiopacity degree of posts is not enough for adequate visualization during radiographic analyses. Glass fiber post with stainless steel reinforcement has been fabricated in an attempt to overcome this limitation. <b> Aim: </b> This study was designed to determine the influence of this metal reinforcement on the post mechanical properties. <b> Materials and Methods: </b> This study evaluated flexural modulus (E), flexural strength (σ), and stiffness (S) of five different fiber post systems (n = 5): RfX (Reforpost Glass Fiber RX; Ângelus, Londrina, PR, Brazil); RG (Reforpost Glass Fiber, Ângelus); RC (Reforpost Carbon Fiber, Ângelus); FP (Fibrekor Post; Jeneric Pentron Inc., Wallingford, CT, USA); and CP (C-Post; Bisco Dental Products, Schaumburg, IL, USA), testing the hypothesis that the insertion of a metal reinforcement (RfX) jeopardizes the mechanical properties of a glass fiber post. Posts were loaded in three-point bending using a testing machine with a crosshead speed of 0.5 mm/min. <b> Results</b> : The results were statistically analyzed using one-way ANOVA and Tukey′s multiple range tests (a = 0.05). Mean and standard deviation values of E (GPa), s (MPa), and S (N/mm) were as follows: RfX: 10.8 ± 1.6, 598.0 ± 52.0, 132.0 ± 21.9; RG: 10.6 ± 1.0, 562.0 ± 24.9, 137.8 ± 5.5; RC: 15.9 ± 2.4, 680.5 ± 34.8, 190.9 ± 12.9; FP: 10.9 ± 1.4, 586.8 ± 21.9, 122.4 ± 17.3; CP: 6.3 ± 1.7, 678.1 ± 54.2, 246.0 ± 41.7. Carbon fiber posts showed the highest mean s values (P < 0.05). In addition, RC showed the highest mean E value and CP showed the highest mean S value (P < 0.05). <b>Conclusion</b> : The hypothesis was rejected since the metal reinforcement in the glass fiber post (RfX) does not decrease the mechanical property values. Posts reinforced with carbon fibers have a higher flexural strength than glass fiber posts, although all posts showed similar mechanical property values with dentin. |
| first_indexed | 2024-12-12T04:16:24Z |
| format | Article |
| id | doaj.art-c083d1ba83be4342b7ed22081c4fcf47 |
| institution | Directory Open Access Journal |
| issn | 0970-9290 1998-3603 |
| language | English |
| last_indexed | 2024-12-12T04:16:24Z |
| publishDate | 2009-01-01 |
| publisher | Wolters Kluwer Medknow Publications |
| record_format | Article |
| series | Indian Journal of Dental Research |
| spelling | doaj.art-c083d1ba83be4342b7ed22081c4fcf472022-12-22T00:38:27ZengWolters Kluwer Medknow PublicationsIndian Journal of Dental Research0970-92901998-36032009-01-01203277281Flexural modulus, flexural strength, and stiffness of fiber-reinforced postsNovais VeridianaQuagliatto PauloBona AlvaroCorrer-Sobrinho LourencoSoares Carlos<b>Background: </b> The radiopacity degree of posts is not enough for adequate visualization during radiographic analyses. Glass fiber post with stainless steel reinforcement has been fabricated in an attempt to overcome this limitation. <b> Aim: </b> This study was designed to determine the influence of this metal reinforcement on the post mechanical properties. <b> Materials and Methods: </b> This study evaluated flexural modulus (E), flexural strength (σ), and stiffness (S) of five different fiber post systems (n = 5): RfX (Reforpost Glass Fiber RX; Ângelus, Londrina, PR, Brazil); RG (Reforpost Glass Fiber, Ângelus); RC (Reforpost Carbon Fiber, Ângelus); FP (Fibrekor Post; Jeneric Pentron Inc., Wallingford, CT, USA); and CP (C-Post; Bisco Dental Products, Schaumburg, IL, USA), testing the hypothesis that the insertion of a metal reinforcement (RfX) jeopardizes the mechanical properties of a glass fiber post. Posts were loaded in three-point bending using a testing machine with a crosshead speed of 0.5 mm/min. <b> Results</b> : The results were statistically analyzed using one-way ANOVA and Tukey′s multiple range tests (a = 0.05). Mean and standard deviation values of E (GPa), s (MPa), and S (N/mm) were as follows: RfX: 10.8 ± 1.6, 598.0 ± 52.0, 132.0 ± 21.9; RG: 10.6 ± 1.0, 562.0 ± 24.9, 137.8 ± 5.5; RC: 15.9 ± 2.4, 680.5 ± 34.8, 190.9 ± 12.9; FP: 10.9 ± 1.4, 586.8 ± 21.9, 122.4 ± 17.3; CP: 6.3 ± 1.7, 678.1 ± 54.2, 246.0 ± 41.7. Carbon fiber posts showed the highest mean s values (P < 0.05). In addition, RC showed the highest mean E value and CP showed the highest mean S value (P < 0.05). <b>Conclusion</b> : The hypothesis was rejected since the metal reinforcement in the glass fiber post (RfX) does not decrease the mechanical property values. Posts reinforced with carbon fibers have a higher flexural strength than glass fiber posts, although all posts showed similar mechanical property values with dentin.http://www.ijdr.in/article.asp?issn=0970-9290;year=2009;volume=20;issue=3;spage=277;epage=281;aulast=NovaisEndodontic postsflexural modulusflexural strengthstiffness |
| spellingShingle | Novais Veridiana Quagliatto Paulo Bona Alvaro Correr-Sobrinho Lourenco Soares Carlos Flexural modulus, flexural strength, and stiffness of fiber-reinforced posts Indian Journal of Dental Research Endodontic posts flexural modulus flexural strength stiffness |
| title | Flexural modulus, flexural strength, and stiffness of fiber-reinforced posts |
| title_full | Flexural modulus, flexural strength, and stiffness of fiber-reinforced posts |
| title_fullStr | Flexural modulus, flexural strength, and stiffness of fiber-reinforced posts |
| title_full_unstemmed | Flexural modulus, flexural strength, and stiffness of fiber-reinforced posts |
| title_short | Flexural modulus, flexural strength, and stiffness of fiber-reinforced posts |
| title_sort | flexural modulus flexural strength and stiffness of fiber reinforced posts |
| topic | Endodontic posts flexural modulus flexural strength stiffness |
| url | http://www.ijdr.in/article.asp?issn=0970-9290;year=2009;volume=20;issue=3;spage=277;epage=281;aulast=Novais |
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