{"title":"声发射测试在脆性材料断裂韧性评估中的应用。","authors":"Camille Haddad, Jean Gebran Eng, Amine El Zoghbi","doi":"10.5005/jp-journals-10024-3722","DOIUrl":null,"url":null,"abstract":"<p><strong>Aim: </strong>Evaluating the fracture resistance of dental ceramics is essential for assessing their behavior. This study aimed to validate a custom load-to-fracture test for assessing fracture strength compared to a conventional method.</p><p><strong>Materials and methods: </strong>Acoustic emission testing, a non-destructive (ND) lab test, was employed to evaluate the fracture toughness (FT) of brittle materials by capturing sound waves generated by crack formation in failing samples. A total of 130 samples, divided into three types (glass sheets, zirconia sheets, and monolithic zirconia crowns), were tested. The fracture loads were measured using both custom and conventional methods.</p><p><strong>Results: </strong>The mean fracture loads for glass sheets were 650.46 N ± 110.38 (custom) compared to 691.41 N ± 155.92 (conventional). For zirconia sheets, the values were 95.25 N ± 7.78 (custom) vs 112.75 N ± 31.26 (conventional). Monolithic zirconia crowns showed mean fracture loads of 1108.99 N ± 327.89 (custom) compared to 1292.52 N ± 271.42 (conventional). Statistically significant differences were evident in all three types, indicating lower values with custom testing for all samples.</p><p><strong>Conclusion: </strong>The custom testing demonstrated an advantage in identifying cracks at lower loads, thereby enhancing the accuracy of fracture load values. Despite its limitations, the study suggests that the custom setup could be a viable alternative to conventional fracture load testing of brittle materials. However, further testing with more materials is recommended to enhance the results' accuracy and generalizability.</p><p><strong>Clinical significance: </strong>The findings indicate that the custom load-to-fracture test can provide more accurate measurements of FT in dental ceramics, which is crucial for predicting their clinical performance and longevity. How to cite this article: Haddad C, Eng JG, Zoghbi AE. The Acoustic Emission Testing in the Evaluation of Fracture Toughness of Brittle Materials. J Contemp Dent Pract 2024;25(7):617-623.</p>","PeriodicalId":35792,"journal":{"name":"Journal of Contemporary Dental Practice","volume":"25 7","pages":"617-623"},"PeriodicalIF":0.0000,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The Acoustic Emission Testing in the Evaluation of Fracture Toughness of Brittle Materials.\",\"authors\":\"Camille Haddad, Jean Gebran Eng, Amine El Zoghbi\",\"doi\":\"10.5005/jp-journals-10024-3722\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Aim: </strong>Evaluating the fracture resistance of dental ceramics is essential for assessing their behavior. This study aimed to validate a custom load-to-fracture test for assessing fracture strength compared to a conventional method.</p><p><strong>Materials and methods: </strong>Acoustic emission testing, a non-destructive (ND) lab test, was employed to evaluate the fracture toughness (FT) of brittle materials by capturing sound waves generated by crack formation in failing samples. A total of 130 samples, divided into three types (glass sheets, zirconia sheets, and monolithic zirconia crowns), were tested. The fracture loads were measured using both custom and conventional methods.</p><p><strong>Results: </strong>The mean fracture loads for glass sheets were 650.46 N ± 110.38 (custom) compared to 691.41 N ± 155.92 (conventional). For zirconia sheets, the values were 95.25 N ± 7.78 (custom) vs 112.75 N ± 31.26 (conventional). Monolithic zirconia crowns showed mean fracture loads of 1108.99 N ± 327.89 (custom) compared to 1292.52 N ± 271.42 (conventional). Statistically significant differences were evident in all three types, indicating lower values with custom testing for all samples.</p><p><strong>Conclusion: </strong>The custom testing demonstrated an advantage in identifying cracks at lower loads, thereby enhancing the accuracy of fracture load values. Despite its limitations, the study suggests that the custom setup could be a viable alternative to conventional fracture load testing of brittle materials. However, further testing with more materials is recommended to enhance the results' accuracy and generalizability.</p><p><strong>Clinical significance: </strong>The findings indicate that the custom load-to-fracture test can provide more accurate measurements of FT in dental ceramics, which is crucial for predicting their clinical performance and longevity. How to cite this article: Haddad C, Eng JG, Zoghbi AE. The Acoustic Emission Testing in the Evaluation of Fracture Toughness of Brittle Materials. 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引用次数: 0
摘要
目的：评估牙科陶瓷的抗断裂性对于评估其行为至关重要。与传统方法相比，本研究旨在验证用于评估断裂强度的定制载荷-断裂测试：声发射测试是一种非破坏性（ND）实验室测试，通过捕捉失效样品中裂纹形成时产生的声波来评估脆性材料的断裂韧性（FT）。总共测试了 130 个样品，分为三种类型（玻璃片、氧化锆片和整体氧化锆冠）。采用定制方法和传统方法测量了断裂载荷：结果：玻璃片的平均断裂载荷为 650.46 N ± 110.38（定制），而传统方法为 691.41 N ± 155.92。氧化锆板的数值为 95.25 N ± 7.78（定制法）与 112.75 N ± 31.26（传统法）。整体氧化锆冠的平均断裂载荷为1108.99牛顿±327.89牛顿（定制）与1292.52牛顿±271.42牛顿（传统）。所有三种类型在统计学上都存在明显差异，表明所有样本的定制测试值都较低：定制测试在识别较低载荷下的裂缝方面具有优势，从而提高了断裂载荷值的准确性。尽管有其局限性，但研究表明，定制设置可以替代脆性材料的传统断裂载荷测试。不过，建议使用更多材料进行进一步测试，以提高结果的准确性和通用性：研究结果表明，定制载荷-断裂测试可以更准确地测量牙科陶瓷的FT，这对预测其临床性能和使用寿命至关重要。本文引用方式Haddad C, Eng JG, Zoghbi AE.声发射测试在脆性材料断裂韧性评估中的应用。J Contemp Dent Pract 2024;25(7):617-623.
The Acoustic Emission Testing in the Evaluation of Fracture Toughness of Brittle Materials.
Aim: Evaluating the fracture resistance of dental ceramics is essential for assessing their behavior. This study aimed to validate a custom load-to-fracture test for assessing fracture strength compared to a conventional method.
Materials and methods: Acoustic emission testing, a non-destructive (ND) lab test, was employed to evaluate the fracture toughness (FT) of brittle materials by capturing sound waves generated by crack formation in failing samples. A total of 130 samples, divided into three types (glass sheets, zirconia sheets, and monolithic zirconia crowns), were tested. The fracture loads were measured using both custom and conventional methods.
Results: The mean fracture loads for glass sheets were 650.46 N ± 110.38 (custom) compared to 691.41 N ± 155.92 (conventional). For zirconia sheets, the values were 95.25 N ± 7.78 (custom) vs 112.75 N ± 31.26 (conventional). Monolithic zirconia crowns showed mean fracture loads of 1108.99 N ± 327.89 (custom) compared to 1292.52 N ± 271.42 (conventional). Statistically significant differences were evident in all three types, indicating lower values with custom testing for all samples.
Conclusion: The custom testing demonstrated an advantage in identifying cracks at lower loads, thereby enhancing the accuracy of fracture load values. Despite its limitations, the study suggests that the custom setup could be a viable alternative to conventional fracture load testing of brittle materials. However, further testing with more materials is recommended to enhance the results' accuracy and generalizability.
Clinical significance: The findings indicate that the custom load-to-fracture test can provide more accurate measurements of FT in dental ceramics, which is crucial for predicting their clinical performance and longevity. How to cite this article: Haddad C, Eng JG, Zoghbi AE. The Acoustic Emission Testing in the Evaluation of Fracture Toughness of Brittle Materials. J Contemp Dent Pract 2024;25(7):617-623.
期刊介绍：
The Journal of Contemporary Dental Practice (JCDP), is a peer-reviewed, open access MEDLINE indexed journal. The journal’s full text is available online at http://www.thejcdp.com. The journal allows free access (open access) to its contents. Articles with clinical relevance will be given preference for publication. The Journal publishes original research papers, review articles, rare and novel case reports, and clinical techniques. Manuscripts are invited from all specialties of dentistry i.e., conservative dentistry and endodontics, dentofacial orthopedics and orthodontics, oral medicine and radiology, oral pathology, oral surgery, orodental diseases, pediatric dentistry, implantology, periodontics, clinical aspects of public health dentistry, and prosthodontics.
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