{"title":"复合增强材料对髓内治疗牙MOD腔修复体抗折性的影响。","authors":"Lena Bal, Cangül Keskin, Aybüke Karaca Sakallı, Bilge Özcan, İsen Güleç Koçyiğit","doi":"10.1007/s00784-025-06560-6","DOIUrl":null,"url":null,"abstract":"<p><strong>Objective: </strong>Bucco-lingual/palatinal vertical fractures are among the most common fractures found in mesio-occluso-distal (MOD) cavity restorations of endodontically treated teeth. This study aimed to compare the effects of different new-generation reinforcement materials applied to two cervical and coronal segments of the teeth on the fracture resistance of endodontically treated teeth in their coronal restorations.</p><p><strong>Materials and methods: </strong>A total of 84 freshly extracted, intact human mandibular molars were selected and treated endodontically according to standardized protocols. Standard MOD cavities were prepared, and the specimens were then randomly divided into seven groups (n = 12) based on the combinations of reinforcement materials applied to the cervical or coronal segments, and a control group. The control group had intact teeth. The experimental groups included combinations of flowable composite (Flow), posterior composite (PC), EverX flow (Xflow), EverX posterior (XP), PC, and Ribbond (RIB). After thermocycling, fracture resistance was evaluated using a universal testing machine, and failure patterns were examined under a stereomicroscope. Data were analyzed using the Kruskal-Wallis H test, following a Shapiro-Wilk test that indicated the data did not follow a normal distribution (p < .05).</p><p><strong>Results: </strong>A statistically significant difference was observed between the groups (p < .05). Group 5, which had RIB flow and XP restoration structure, exhibited the highest fracture resistance (1827.90 N), while Group 1, which had Flow and PC restoration structure, demonstrated the lowest fracture resistance (1121.98 N). Fiber-reinforced structures demonstrate superior fracture resistance compared to the other groups (p < .05). There was no significant difference between conventional restoration and Ribbond in the coronal segment (p > .05).</p><p><strong>Conclusion: </strong>Using fiber-reinforced restoration in the cervical segment increases fracture resistance more than in the coronal segment. Fiber-reinforced composites are easily packable and demonstrate higher fracture resistance than Ribbond.</p><p><strong>Clinical relevance: </strong>Resin-reinforced composite combinations used in cervical and coronal applications improve fracture resistance and can be safely applied for MOD cavity restoration of endodontically treated teeth.</p>","PeriodicalId":10461,"journal":{"name":"Clinical Oral Investigations","volume":"29 10","pages":"481"},"PeriodicalIF":3.1000,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of combined use of reinforcement materials on the fracture resistance of MOD cavity restorations in endodontically treated teeth.\",\"authors\":\"Lena Bal, Cangül Keskin, Aybüke Karaca Sakallı, Bilge Özcan, İsen Güleç Koçyiğit\",\"doi\":\"10.1007/s00784-025-06560-6\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Objective: </strong>Bucco-lingual/palatinal vertical fractures are among the most common fractures found in mesio-occluso-distal (MOD) cavity restorations of endodontically treated teeth. This study aimed to compare the effects of different new-generation reinforcement materials applied to two cervical and coronal segments of the teeth on the fracture resistance of endodontically treated teeth in their coronal restorations.</p><p><strong>Materials and methods: </strong>A total of 84 freshly extracted, intact human mandibular molars were selected and treated endodontically according to standardized protocols. Standard MOD cavities were prepared, and the specimens were then randomly divided into seven groups (n = 12) based on the combinations of reinforcement materials applied to the cervical or coronal segments, and a control group. The control group had intact teeth. The experimental groups included combinations of flowable composite (Flow), posterior composite (PC), EverX flow (Xflow), EverX posterior (XP), PC, and Ribbond (RIB). After thermocycling, fracture resistance was evaluated using a universal testing machine, and failure patterns were examined under a stereomicroscope. Data were analyzed using the Kruskal-Wallis H test, following a Shapiro-Wilk test that indicated the data did not follow a normal distribution (p < .05).</p><p><strong>Results: </strong>A statistically significant difference was observed between the groups (p < .05). Group 5, which had RIB flow and XP restoration structure, exhibited the highest fracture resistance (1827.90 N), while Group 1, which had Flow and PC restoration structure, demonstrated the lowest fracture resistance (1121.98 N). Fiber-reinforced structures demonstrate superior fracture resistance compared to the other groups (p < .05). There was no significant difference between conventional restoration and Ribbond in the coronal segment (p > .05).</p><p><strong>Conclusion: </strong>Using fiber-reinforced restoration in the cervical segment increases fracture resistance more than in the coronal segment. Fiber-reinforced composites are easily packable and demonstrate higher fracture resistance than Ribbond.</p><p><strong>Clinical relevance: </strong>Resin-reinforced composite combinations used in cervical and coronal applications improve fracture resistance and can be safely applied for MOD cavity restoration of endodontically treated teeth.</p>\",\"PeriodicalId\":10461,\"journal\":{\"name\":\"Clinical Oral Investigations\",\"volume\":\"29 10\",\"pages\":\"481\"},\"PeriodicalIF\":3.1000,\"publicationDate\":\"2025-09-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Clinical Oral Investigations\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://doi.org/10.1007/s00784-025-06560-6\",\"RegionNum\":2,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"DENTISTRY, ORAL SURGERY & MEDICINE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Clinical Oral Investigations","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1007/s00784-025-06560-6","RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"DENTISTRY, ORAL SURGERY & MEDICINE","Score":null,"Total":0}
Effect of combined use of reinforcement materials on the fracture resistance of MOD cavity restorations in endodontically treated teeth.
Objective: Bucco-lingual/palatinal vertical fractures are among the most common fractures found in mesio-occluso-distal (MOD) cavity restorations of endodontically treated teeth. This study aimed to compare the effects of different new-generation reinforcement materials applied to two cervical and coronal segments of the teeth on the fracture resistance of endodontically treated teeth in their coronal restorations.
Materials and methods: A total of 84 freshly extracted, intact human mandibular molars were selected and treated endodontically according to standardized protocols. Standard MOD cavities were prepared, and the specimens were then randomly divided into seven groups (n = 12) based on the combinations of reinforcement materials applied to the cervical or coronal segments, and a control group. The control group had intact teeth. The experimental groups included combinations of flowable composite (Flow), posterior composite (PC), EverX flow (Xflow), EverX posterior (XP), PC, and Ribbond (RIB). After thermocycling, fracture resistance was evaluated using a universal testing machine, and failure patterns were examined under a stereomicroscope. Data were analyzed using the Kruskal-Wallis H test, following a Shapiro-Wilk test that indicated the data did not follow a normal distribution (p < .05).
Results: A statistically significant difference was observed between the groups (p < .05). Group 5, which had RIB flow and XP restoration structure, exhibited the highest fracture resistance (1827.90 N), while Group 1, which had Flow and PC restoration structure, demonstrated the lowest fracture resistance (1121.98 N). Fiber-reinforced structures demonstrate superior fracture resistance compared to the other groups (p < .05). There was no significant difference between conventional restoration and Ribbond in the coronal segment (p > .05).
Conclusion: Using fiber-reinforced restoration in the cervical segment increases fracture resistance more than in the coronal segment. Fiber-reinforced composites are easily packable and demonstrate higher fracture resistance than Ribbond.
Clinical relevance: Resin-reinforced composite combinations used in cervical and coronal applications improve fracture resistance and can be safely applied for MOD cavity restoration of endodontically treated teeth.
期刊介绍：
The journal Clinical Oral Investigations is a multidisciplinary, international forum for publication of research from all fields of oral medicine. The journal publishes original scientific articles and invited reviews which provide up-to-date results of basic and clinical studies in oral and maxillofacial science and medicine. The aim is to clarify the relevance of new results to modern practice, for an international readership. Coverage includes maxillofacial and oral surgery, prosthetics and restorative dentistry, operative dentistry, endodontics, periodontology, orthodontics, dental materials science, clinical trials, epidemiology, pedodontics, oral implant, preventive dentistiry, oral pathology, oral basic sciences and more.
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