The effect of taper and apical preparation size on fracture resistance of roots

DOĞANAY YILDIZ E., Fidan M. E., SAKARYA R. E., Dincer B.

AUSTRALIAN ENDODONTIC JOURNAL, vol.47, no.1, pp.67-72, 2021 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 47 Issue: 1
  • Publication Date: 2021
  • Doi Number: 10.1111/aej.12472
  • Journal Name: AUSTRALIAN ENDODONTIC JOURNAL
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, EMBASE, MEDLINE
  • Page Numbers: pp.67-72
  • Keywords: apical preparation size, fracture resistance, taper, RESIDUAL DENTIN THICKNESS, MANDIBULAR 1ST MOLARS, ROTARY INSTRUMENTATION, MAXILLARY PREMOLARS, TOOTH FRACTURE, FILLED TEETH, ENLARGEMENT, IRRIGATION, REDUCTION, IMPACT
  • Bursa Uludag University Affiliated: Yes

Abstract

This study investigated the effect of taper and apical preparation size on the fracture resistance of roots. 84 mandibular incisor teeth were selected. Groups (n = 12): uninstrumented (control group), 25/0.04, 25/0.06, 25/0.08, 30/0.04, 30/0.06 and 30/0.08. K3XF files (Kerr Endodontics, Orange, CA) were used for canal preparation. Fracture resistance was tested using a Universal test machine. For statistical analysis, the level of significance was P <= 0.05, and one-way anova and post hoc LSD tests were used. The control group showed the highest fracture resistance (P < 0.05). No significant difference was found between 25/0.04 and 25/0.06; 25/0.06 and 25/0.08; 30/0.04 and 30/0.06; 30/0.06 and 30/0.08; 25/0.04 and 30/0.04; 25/0.06 and 30/0.06; and 25/0.08 and 30/0.08 (P > 0.05). Significant differences were found between 25/0.04 and 25/0.08; 30/0.04 and 30/0.08; and 25/0.08 and 30/0.04 (P < 0.05). In conclusion, the clinical selection of larger tapers can cause a higher risk of fracture.