Effective Factors Including Periodontal Ligament on Vertical Root Fractures
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概要
- 論文の詳細を見る
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.
- 日本歯科理工学会の論文
著者
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TAKAHASHI Hidekazu
Advanced Biomaterials, Graduate School, Tokyo Medical and Dental University
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Iwasaki Naohiko
Advanced Biomaterials, Graduate School of Medical and Dentistry, Tokyo Medical and Dental Univ.
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Takahashi Hidekazu
東京医科歯科大学 医歯学総合研究科包括診療歯科学講座総合診療歯科学
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YOSHIOKA Takatomo
Pulp Biology and Endodontics,
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SUDA Hideaki
Pulp Biology and Endodontics,
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Iwasaki Naohiko
Advanced Biomaterials Department Of Restorative Sciences Division Of Oral Health Sciences Graduate S
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Iwasaki Naohiko
Advanced Biomaterials Graduate School Of Medical And Dentistry Tokyo Medical And Dental Univ.
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Takahashi Hidekazu
Advanced Biomaterials Department Of Restorative Sciences Division Of Oral Health Sciences Graduate S
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Suda Hideaki
Pulp Biology And Endodontics Department Of Restorative Sciences Division Of Oral Health Sciences Gra
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OKITSU Motoko
Pulp Biology and Endodontics, Department of Restorative Sciences, Division of Oral Health Sciences G
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Okitsu Motoko
Pulp Biology And Endodontics Department Of Restorative Sciences Division Of Oral Health Sciences Gra
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Yoshioka Takatomo
Pulp Biology And Endodontics Department Of Restorative Sciences Division Of Oral Health Sciences Gra
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Takahashi Hidekazu
Advanced Biomaterials Graduate School Of Medical And Dentistry Tokyo Medical And Dental Univ.
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Takahashi Hidekazu
Advanced Biomaterials Department Of Restorative Sciences Tokyo Medical And Dental University
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Takahashi Hidekazu
Oral Biomaterials Engineering Department Of Oral Materials Sciences And Technology Course Of Oral He
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Takahashi Hidekazu
Advanced Biomaterials Department Of Restorative Science Division Of Oral Health Science Graduate Sch
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Takahashi Hidekazu
Advanced Biomaterials Department Of Restorative Sciences Division Of Oral Health Sciences Graduate S
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Iwasaki Naohiko
Oral Biomaterials Engineering Course Of Oral Health Engineering School Of Oral Health Care Sciences
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