Avaliação da rugosidade de superfície de diversos ionómeros de vidro

  • Cláudia Filipa Azevedo Machado (Student)

Student thesis: Master's Thesis


INTRODUCTION: Glass ionomers are widely used in pediatric dentistry, especially in non-cooperating patients. Its surface roughness disturbs the attached biofilm and can lead to failure. OBJECTIVE: To determine and compare the surface roughness values of three unfinished glass ionomers or submitted to finishing and polishing. MATERIALS AND METHODS: In this study, we used: a resin-modified glass ionomer (Ionolux®, VOCO, Germany), one with high viscosity (IonoStarPlus®, VOCO, Germany) and one conventional (Ketac®, 3M, ESPE, USA). We created 60 cylindrical matrices (20 x 3 mm) of 20 pieces of each material and divided them into 4 different groups depending on the presence or absence of surface treatment (non-polished 1, preventive 2, Enhance® 3 and Soflex® 4). The surface roughness was assessed by rugosimetry and statistical analysis was performed at a significance level of 0.05. RESULTS: Factorial ANOVA models that include analysis of variance between ionomer variables, polishing techniques, and interactions between IV and polishing techniques cannot be performed. Only statistical analysis by polishing technique was performed. In Group 1, Ionolux® showed the highest roughness (p < 0.001). In Group 2, IonoStar Plus® has the lowest roughness (p < 0.001). In Group 3, IonoStar Plus® has the lowest roughness (p < 0.001). In Group 4, Ketac® has the lowest roughness (p = 0.009). CONCLUSION: The choice of the best ionomer depends on many clinical factors, especially the type of polishing technique. lonolux® has the lowest results for children who cannot stand any kind of polishing technique. For children who allow polishing, we need to evaluate on a case-by-case basis.
Date of Award18 Jul 2022
Original languagePortuguese
Awarding Institution
  • Universidade Católica Portuguesa
SupervisorAndreia Sofia de Paiva Figueiredo (Supervisor) & Mariana Seabra (Co-Supervisor)


  • Glass ionomers
  • Surface roughness
  • Polishing and finishing techniques


  • Mestrado em Medicina Dentária

Cite this