Effective factors including periodontal ligament on vertical root fractures.

Abstract:

: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.

journal_name

Dent Mater J

journal_title

Dental materials journal

authors

Okitsu M,Takahashi H,Yoshioka T,Iwasaki N,Suda H

doi

10.4012/dmj.24.66

keywords:

subject

Has Abstract

pub_date

2005-03-01 00:00:00

pages

66-9

issue

1

eissn

0287-4547

issn

1881-1361

journal_volume

24

pub_type

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