Logo-joddd
J Dent Res Dent Clin Dent Prospects. 2025;19(1): 23-28.
doi: 10.34172/joddd.025.42125
  Abstract View: 116
  PDF Download: 78

Basic Research

Original Article

Exploring the impact of remaining tooth structure and preparation size on the fracture resistance of endodontically treated mandibular premolars

Sıla Nur Usta 1* ORCID logo, Hilal Tekkanat 1, Yiğitcan Sağlam 1, Cumhur Aydin 1

1 Department of Endodontics, Gulhane Faculty of Dentistry, University of Health Sciences, Ankara, Turkey
*Corresponding Author: Sıla Nur Usta, Email: silandeniz29@gmail.com

Abstract

Background. This study evaluated the influence of the combined effects of remaining dentin walls and mechanical instrumentation with taper sizes of 0.04 and 0.06 on the fracture resistance of endodontically treated mandibular premolars.

Methods. Seventy single-canal mandibular premolar teeth with similar dimensions were selected and divided into one control group and three main experimental groups: control group: intact teeth, group 1: four remaining walls, group 2: three remaining walls, and group 3: two remaining walls. Each group was further divided into two subgroups in terms of preparation size (0.06 or 0.04 taper). The teeth were restored with composite resin after creating restorative models and performing endodontic treatments. The fracture resistance of teeth was measured by the push-out test. Data were analyzed using two-way ANOVA and post hoc tests and the square of Spearman’s linear coefficient (P<0.05).

Results. The control group exhibited the highest fracture resistance compared to the experimental groups (P<0.05). Regardless of the taper size, group 3 showed the lowest fracture resistance values compared to groups 1 and 2 (P<0.05). Preparation sizes similarly affected the fracture strength of teeth (P>0.05). A significant positive association was found between the remaining dentin walls and fracture resistance (P<0.05).

Conclusion. This study emphasized the importance of preserving coronal dentin for fracture resistance in endodontically treated teeth (ETTs). Conservative instrumentation did not provide any advantages over traditional preparation in increasing fracture resistance.


First Name
Last Name
Email Address
Comments
Security code


Abstract View: 117

Your browser does not support the canvas element.


PDF Download: 78

Your browser does not support the canvas element.

Submitted: 17 Jan 2025
Revision: 25 Feb 2025
Accepted: 08 Mar 2025
ePublished: 31 Mar 2025
EndNote EndNote

(Enw Format - Win & Mac)

BibTeX BibTeX

(Bib Format - Win & Mac)

Bookends Bookends

(Ris Format - Mac only)

EasyBib EasyBib

(Ris Format - Win & Mac)

Medlars Medlars

(Txt Format - Win & Mac)

Mendeley Web Mendeley Web
Mendeley Mendeley

(Ris Format - Win & Mac)

Papers Papers

(Ris Format - Win & Mac)

ProCite ProCite

(Ris Format - Win & Mac)

Reference Manager Reference Manager

(Ris Format - Win only)

Refworks Refworks

(Refworks Format - Win & Mac)

Zotero Zotero

(Ris Format - Firefox Plugin)