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Home Paedodontic preformed crowns in primary teeth and relative degree of dental wear

Paedodontic preformed crowns in primary teeth and relative degree of dental wear

Authors:

  • A. G. Signoriello
    Resident, DDS, MsC, Department of Neurosciences – Dentistry Section
  • E. Stellini
    Full Professor, DDS, Department of Neurosciences – Dentistry Section
  • R. Bertolini
    Researcher, Engineer, PhD, Department Industrial Engineering
  • L. Pezzato
    Researcher, Engineer, PhD, Department Industrial Engineering
  • P. Positello
    Resident, DDS, MsC, Department of Neurosciences – Dentistry Section
  • A. A. Gracco
    Associate Professor, DDS, Department of Neurosciences – Dentistry Section
  • S. Mazzoleni
    Aggregate Professor, DDS, Department of Neurosciences – Dentistry Section
  • F. S. Ludovichetti
    Adjunct Professor, DDS, PhD, PhD, Department of Neurosciences – Dentistry Section, Università degli Studi di Padova, Padova, Italy

DOI:

https://doi.org/10.23804/ejpd.2024.2013

ABSTRACT


Aim

Prosthetic rehabilitation of deciduous teeth in paediatric age using pre-formed crowns has been considered one of the best methods of dental restoration since their introduction. Their main advantages are related to durability, longevity and a low rate of recurrent cavities. Since stainless steel crowns do not coincide with aesthetic needs of parents and patients, preformed paedodontic crowns made of zirconia and nano-hybrid composite was introduced. The aim of the study is to evaluate the degree of wear on the enamel and on themselves of the different paedodontic crowns.

Material and methods

Nine bovine teeth and nine paedodontic crowns for deciduous molars were selected for the study, three of which in zirconia, three in nano-hybrid composite and three in stainless steel. Wear test was carried out on the Rtech™ Instruments tribometer applying a force of 50 N. After that, both the bovine teeth and the paedodontic crowns were observed using a stereo microscope (Zeiss Stemi C-500) and a scanning electron microscope (SEM, Cambridge Stereoscan 440). The areas of wear were calculated with a software [ImageJ, version 1x, Wayne Rasband, Maryland, USA].

Results

The zirconia crown was found to have the highest friction coefficient (0.77), while the metal crown the lowest (0.47). The zirconia crown showed the smallest wear area (0.98), while the nano-hybrid composite crown had the largest wear area (5.6). Regarding the wear of the opposing bovine teeth, the nano-hybrid composite crown caused a lower wear volume (0.00585) and wear area (1.2) than zirconia and stainless steel crowns, which achieved similar results.

Conclusion

Pre-formed paediatric crowns in zirconia, nano-hybrid composite and stainless steel are a valid aid for the restoration of deciduous teeth and do not compromise the physiological wear characteristic of the phases of the dental exchange. The stainless steel crown is preferable for the restorations in the posterior sectors as its behaviour is the most similar to that of a natural tooth. Zirconia and nano-hybrid composite crowns showed an inversely proportional behaviour between their wear volume and that of the opposing tooth.

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Publication date:

March /2025

Issue:

Vol.26 – n.1/2025

Page:

19 – 23

Publisher:

Tecniche Nuove

Topic:

Paediatric restorative dentistry

Cite:


Harvard: A. G. Signoriello, E. Stellini, R. Bertolini, L. Pezzato, P. Positello, A. A. Gracco, S. Mazzoleni, F. S. Ludovichetti (2025) "Paedodontic preformed crowns in primary teeth and relative degree of dental wear", European Journal of Paediatric Dentistry, 26(1), pp19-23. doi: 10.23804/ejpd.2024.2013
Vancouver: A. G. Signoriello, E. Stellini, R. Bertolini, L. Pezzato, P. Positello, A. A. Gracco, S. Mazzoleni, F. S. Ludovichetti. Paedodontic preformed crowns in primary teeth and relative degree of dental wear. European Journal of Paediatric Dentistry [Internet]. 2025Mar.22 [cited 2025May.08];26(1):19-23. Available from: https://www.ejpd.eu/abstract-pubmed/paedodontic-preformed-crowns-in-primary-teeth-and-relative-degree-of-dental-wear/
MLA: A. G. Signoriello, E. Stellini, R. Bertolini, L. Pezzato, P. Positello, A. A. Gracco, S. Mazzoleni, F. S. Ludovichetti Paedodontic preformed crowns in primary teeth and relative degree of dental wear. European Journal of Paediatric Dentistry. 2025;26(1):19-23

Copyright (c) 2021 Ariesdue

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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

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Cristina Calchera
Editor in chief: dott. Luigi Paglia
European Journal of Paediatric Dentistry © | ISSN (Online): 2035-648X
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