Effective Factors Including Periodontal Ligament on Vertical Root Fractures
| العنوان: | Effective Factors Including Periodontal Ligament on Vertical Root Fractures |
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| المؤلفون: | Naohiko Iwasaki, Takatomo Yoshioka, Motoko Okitsu, Hidekazu Takahashi, Hideaki Suda |
| المصدر: | Dental Materials Journal. 24:66-69 |
| بيانات النشر: | Japanese Society for Dental Materials and Devices, 2005. |
| سنة النشر: | 2005 |
| مصطلحات موضوعية: | Dental Stress Analysis, Dental Instruments, Universal testing machine, Materials science, Periodontal Ligament, business.industry, Root canal, Dentistry, Apex (geometry), Incisor, Tooth Fractures, medicine.anatomical_structure, Tooth Apex, Logistic analysis, Ceramics and Composites, medicine, Fracture (geology), Humans, Periodontal fiber, Maxillary central incisor, Tooth Root, business, General Dentistry, Root Canal Preparation |
| الوصف: | The purpose of the present study was to analyze effective factors including periodontal ligament on vertical root fractures (VRFs). Eighty maxillary central incisors were assigned to eight groups, depending on master apical file (MAF) size, loading point and existence of a simulated periodontal ligament (PDL). The gutta-percha in the root canal was vertically pressed with a Co-Cr rod using a universal testing machine. An ordinal logistic analysis was employed to determine significant factors. VRFs were observed in 88.8% of the specimens but no horizontal fractures were found. There were three types of VRFs: partial fracture not involving the apex (PF, 41.3%), partial fracture involving the apex (AF, 40.0%), and complete fracture (CF, 7.5%). MAF size significantly affected VRFs (p < 0.05); large MAF size exhibited more partial fractures involving the apex. Loading point and existence of PDL did not affect VRFs. |
| تدمد: | 1881-1361 0287-4547 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::47040f089841b6a674f0593d5d7e635bTest https://doi.org/10.4012/dmj.24.66Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....47040f089841b6a674f0593d5d7e635b |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 18811361 02874547 |
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