European Archives of Paediatric Dentistry

, Volume 14, Issue 5, pp 345–349 | Cite as

Repairing ditched amalgam restorations is less time and tooth structure-consuming than replacement

  • T. L. Lenzi
  • M. Marquezan
  • G. C. Bonini
  • L. B. Camargo
  • D. P. RaggioEmail author
Original Scientific Article



To evaluate the dental structure loss associated with procedures of replacement or maintenance for ditched amalgam restorations in primary molars and the time required to perform each treatment.


Ditched amalgam restorations (n = 40) were submitted to four different strategies: polishing group—polishing and finishing of restorations; amalgam group—replacement of ditched amalgam restorations with new amalgam restorations; resin group—replacement of amalgam restorations with resin composite restorations; flowable resin group—filling the ditch with a flowable resin composite. The teeth were analysed with a stereomicroscope and the areas pre- and post-treatment were determined by image analysis software to evaluate structural loss. The time required to perform each treatment was recorded in seconds.


Student’s t test was used to compare areas pre- and post-treatments. ANOVA and Student-Newman-Keuls tests (p < 0.05) were used to compare differences among groups and the time to perform each procedure.


Dental structure loss was observed in resin and amalgam groups. Replacing the restorations with amalgam took more time, while polishing and applying flowable resin composite consumed less than half of the time compared with amalgam and resin groups.


Maintenance of ditched amalgam restorations by polishing and sealing preserves dental structure and involves less time compared with that for replacement of restorations.


Dental materials Primary tooth Dental amalgam Operative dentistry Dental restoration failure 



We would like to thank the participants of the Post-Graduation in Paediatric Dentistry Seminar of FOUSP for the critical comments put forth, FAPESP and CNPq for financial support.


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Copyright information

© European Academy of Paediatric Dentistry 2013

Authors and Affiliations

  • T. L. Lenzi
    • 1
  • M. Marquezan
    • 2
  • G. C. Bonini
    • 3
  • L. B. Camargo
    • 1
  • D. P. Raggio
    • 1
    Email author
  1. 1.Department of Orthodontics and Paediatric Dentistry, School of DentistryUniversity of São PauloSão PauloBrazil
  2. 2.Federal University of Santa MariaSanta MariaBrazil
  3. 3.Paediatric Dentistry DepartmentSão Leopoldo Mandic Institute and Research CentreCampinasBrazil

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