The Effects of Endodontic Access Cavity Preparation Design on the Fracture Strength of Endodontically Treated Teeth: Traditional Versus Conservative Preparation

Ozyurek T., Ulker O., Demiryutrek E. O., Yılmaz F.

JOURNAL OF ENDODONTICS, cilt.44, sa.5, ss.800-805, 2018 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 44 Sayı: 5
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1016/j.joen.2018.01.020
  • Dergi Adı: JOURNAL OF ENDODONTICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.800-805
  • Anahtar Kelimeler: Conservative access cavity, EverX Posterior, fracture strength, SDR, traditional access cavity, MINIMALLY INVASIVE ENDODONTICS, FIBER-REINFORCED COMPOSITE, FINITE-ELEMENT-ANALYSIS, IN-VITRO, INSTRUMENTATION EFFICACY, RESIN COMPOSITE, RESTORATIVE PROCEDURES, MAXILLARY MOLARS, RESISTANCE, EXTRACTION
  • Ondokuz Mayıs Üniversitesi Adresli: Evet

Özet

Introduction: The aim of this study was to compare the fracture strengths of mandibular molar teeth prepared using traditional endodontic cavity (TEC) and conservative endodontic cavity (CEC) methods and restored using SDR (Dentsply Caulk, Milford, DE) and EverX Posterior (GC Dental, Tokyo, Japan) base composite materials. Methods: A hundred mandibular first molar teeth were randomly divided into 5 groups. In group 1 (the control group), samples were kept intact. In group 2, TECs were prepared, and the samples were restored with EverX Posterior and composite resin. In group 3, CECs were prepared, and the samples were restored with EverX Posterior and composite resin. In group 4, TECs were prepared, and the samples were restored with SDR and composite resin. In group 5, CECs were prepared, and the samples were restored with SDR and composite resin. This load was applied on the samples at 1-mm/min speed using a 6-mm round-head tip until fracture. The forces resulting in fracture were recorded in newton units. The data were analyzed using Kruskal-Wallis and Pearson correlation tests at a 5% significance level. Results: The fracture strengths of the samples in the control group were significantly higher than the experimental groups (P < .05). There was no statistically significant difference in the endodontic access cavities prepared used the TEC and CEC methods and restored using the same composite base material (P > .05). Conclusions: CEC preparation did not increase the fracture strength of teeth with class II cavities compared with TEC preparation. The fracture strength of teeth restored with the SDR bulk-fill composite was higher than that of teeth restored with EverX Posterior.