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Original Research

Open Access

Evaluation of stress generation in core build up-material of mutilated primary teeth: a comparative finite element analysis between BioFlx, stainless steel and zirconia crowns

  • Tripti Lath1
  • Nilesh Rathi1,*,
  • Vini Mehta2
  • Viddyasagar Prabhakar Mopagar3
  • Raju Umaji Patil4
  • Shivyogi Hugar5
  • Marco Cicciù6
  • Giuseppe Minervini7,8

1Department of Pediatric and Preventive Dentistry, Dr. D. Y. Patil Dental College and Hospital, Dr. D. Y. Patil Vidyapeeth, 411018 Pune, India

2Department of Dental Research Cell, Dr. D. Y. Patil Dental College and Hospital, Dr. D. Y. Patil Vidyapeeth, 411018 Pune, India

3Department of Pediatric and Preventive Dentistry, Rural Dental College, 414001 Loni, India

4Department of Pedodontics and Preventive Dentistry, STES Sinhgad Dental College and Hospital, 411041 Pune, India

5Department of Paediatric and Preventive Dentistry, Department of Pediatric and Preventive Dentistry, KLE Vishwanath Katti Institute of Dental Sciences & Hospital, 59010 Belagavi, India

6Department of Biomedical and Surgical and Biomedical Sciences, Catania University, 95123 Catania, Italy

7Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, 600077 Chennai, India

8Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania Luigi Vanvitelli, 80138 Naples, Italy

DOI: 10.22514/jocpd.2024.132 Vol.48,Issue 6,November 2024 pp.117-122

Submitted: 16 April 2023 Accepted: 13 July 2023

Published: 03 November 2024

*Corresponding Author(s): Nilesh Rathi E-mail: nilesh.rathi@dpu.edu.in

Abstract

Stainless-steel crowns (SSCs) are the most durable restorative option for deciduous teeth, although they are unsightly. However, prefabricated zirconia crowns (ZCs) look more pleasant but require substantial dental preparation. Recently, BioFlx crowns have been introduced as a white-colored alternative to SSCs, providing both flexibility and aesthetics. However, clinical trials have not assessed their oral cavity load-bearing capacity and suitability for repairing severely decayed deciduous teeth. To address this gap, the present study compared the shear stresses generated by BioFlx crowns, ZCs and the gold standard SSCs when restoring extensively decayed deciduous teeth using finite element analysis (FEA). The restoration was represented by three finite element models with the identical tooth structure: BioFlx, SSC and ZC, constructed using a Trios 3 scanner and exported for analysis using ANSYS. The FEA results showed that ZCs had the maximum axial static load stress at 40.91 MPa, followed by SSCs at 39.331 MPa and BioFlx at 14.009 MPa. ZCs produced 2.932 MPa at 45◦, SSCs 3.005 MPa and BioFlx 0.3227 MPa. ZCs had a maximum primary stress of 3.055 MPa at 0◦, while SSCs and BioFlx had 2.3 and 0.3017 MPa, respectively. Deformation analysis revealed that under a load direction of 90◦, SSCs deformed by 5.978 mm, ZCs by 5.971 mm and BioFlx by 5.971 mm. When the load was applied at an angle of 45◦, SSCs deformed by 6.527 mm, ZCs by 5.444 mm and BioFlx by 5.447 mm. SSCs deformed 5.452 mm at 0◦ load, while ZCs and BioFlx deformed 6.472 and 6.479 mm, respectively. Based on these findings, BioFlx crowns, in combination with the underlying core material, can withstand maximum loads, suggesting that a mutilated primary posterior tooth restored with glass ionomer cement and a BioFlx crown may be a viable option for frequent clinical use.


Keywords

Deciduous maxillary second molar; Finite element analysis; Fracture resistance; BioFlx crown; Preformed zirconia crown; Stainless steel crowns


Cite and Share

Tripti Lath,Nilesh Rathi,Vini Mehta,Viddyasagar Prabhakar Mopagar,Raju Umaji Patil,Shivyogi Hugar,Marco Cicciù,Giuseppe Minervini. Evaluation of stress generation in core build up-material of mutilated primary teeth: a comparative finite element analysis between BioFlx, stainless steel and zirconia crowns. Journal of Clinical Pediatric Dentistry. 2024. 48(6);117-122.

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