The fracture resistance of pulpotomized primary molars restored with zirconia crowns, lithium disilicate or resin based ceramic endocrowns

BMC Oral Health. 2024 May 20;24(1):583. doi: 10.1186/s12903-024-04332-4.

Abstract

Background: Endocrown in pediatric dentistry was rooted in the fundamental principles of preserving healthy dental tissues, leveraging contemporary adhesive methodologies.

Aim: This research aimed on assessing and comparing the fracture resistance of pulpotomized primary molars when rehabilitated with zirconia crowns and two distinct types of endocrowns, namely E-Max and Brilliant Crios.

Methods: The study involved thirty, anonymized, freshly extracted second primary molars that underwent pulpotomy. These teeth were then evenly divided into three groups, each consisting of ten specimens: the zirconia crown, the E-Max endocrown, and the Brilliant Crios endocrown groups. Post-pulpotomy, the teeth were prepared for their respective restorations. Subsequent to this preparation, the zirconia crowns, E-Max endocrowns, and Brilliant Crios endocrowns were secured. To evaluate the fracture resistance using a computer-controlled testing machine (Instron), a progressively increasing load was applied to each group until fracture occurred. The gathered data were then analyzed for outliers and subjected to normality testing using the Shapiro-Wilk and/or Kolmogorov-Smirnov tests, with a significance threshold set at 0.05.

Results: There was no statistically significant difference in fracture resistance of pulpotomized primary molars among lithium disilicate (E-Max) group (mean=1367.59N), Brilliant Crios group (mean=1349.73N) and zirconia group (mean=1240.82N).

Conclusion: Endocrowns can be considered a promising restoration for pulpotomized primary molars.

Keywords: Brilliant crios; E-Max; Endocrown; Molars; Primary.

MeSH terms

  • Ceramics / chemistry
  • Crowns*
  • Dental Porcelain* / chemistry
  • Dental Restoration, Permanent / methods
  • Dental Stress Analysis
  • Humans
  • Materials Testing
  • Molar*
  • Pulpotomy* / methods
  • Tooth Fractures
  • Tooth, Deciduous*
  • Zirconium*

Substances

  • zirconium oxide
  • lithia disilicate