Analyzing SHORE A hardness to assess the durability of soft denture lining materials

Authors

  • Natália Inês Gonçalves Universidade Estadual Paulista “Júlio de Mesquita Filho”, Instituto de Ciência e Tecnologia, Departamento de Materiais Odontológicos e Prótese. São José dos Campos, SP, Brazil. https://orcid.org/0000-0001-6911-2391
  • Fernanda Zapater Pierre Universidade Estadual Paulista “Júlio de Mesquita Filho”, Instituto de Ciência e Tecnologia, Departamento de Materiais Odontológicos e Prótese. São José dos Campos, SP, Brazil. https://orcid.org/0000-0001-7636-6832
  • Alexandre Luiz Souto Borges Universidade Estadual Paulista “Júlio de Mesquita Filho”, Instituto de Ciência e Tecnologia, Departamento de Materiais Odontológicos e Prótese. São José dos Campos, SP, Brazil. https://orcid.org/0000-0002-5707-7565
  • João Maurício Ferraz da Silva Universidade Estadual Paulista “Júlio de Mesquita Filho”, Instituto de Ciência e Tecnologia, Departamento de Materiais Odontológicos e Prótese. São José dos Campos, SP, Brazil. https://orcid.org/0000-0001-6372-6333
  • Eduardo Shigueyuki Uemura Universidade Estadual Paulista “Júlio de Mesquita Filho”, Instituto de Ciência e Tecnologia, Departamento de Materiais Odontológicos e Prótese. São José dos Campos, SP, Brazil. https://orcid.org/0000-0002-8142-5603

DOI:

https://doi.org/10.4322/bds.2023.e3986

Abstract

Objective: Evaluate the “SHORE A” hardness in four denture soft lining materials at different time intervals. Material and Methods: Forty disc-shaped specimens, with dimensions of 15 mm × 3 mm, were distributed into four groups according to the materials: SC (Soft Confort); TS (Trusoft); UG (Ufi Gel P) and DS (Dentusoft) (n=10). The hardness measurements were performed using a portable digital hardness meter at 1 hour (h), 3 days (d), 7 d, 15 d, 30 and 60 d after preparation of specimens. The data were subjected to statistical analysis. Results: UG presented the highest hardness (39,09±2,27), followed by SC (34,36±8,52), DS (26,23±5,26) and finally TS (18,05±3,60), being that UG and TS had the smaller change in hardness between time intervals. The Repeated Measures ANOVA and Tukey’s test showed that the variables (material and time) and their interaction had differences statistically significant (p</-0.05). Conclusion: The study reveals significant variations in hardness among different groups. The groups SC and DS experienced substantial changes in hardness from initial to final values, with the group SC exhibiting the most pronounced shift. These findings underscore the suitability of acrylic materials for temporary applications. On the other hand, the silicone material (UG) with the highest initial hardness, exhibited relatively minor changes in hardness, emphasizing their recommendation for longlasting applications. Group TS, despite not being composed of silicone, also showed relatively minor changes in hardness, suggesting its potential suitability for specific applications where stability is desirable.

KEYWORDS

Denture liners; Dental prosthesis; Dental tissue conditioning; Hardness tests; Longevity.

Author Biographies

Natália Inês Gonçalves, Universidade Estadual Paulista “Júlio de Mesquita Filho”, Instituto de Ciência e Tecnologia, Departamento de Materiais Odontológicos e Prótese. São José dos Campos, SP, Brazil.

Department of Dental Materials and Prosthodontics, São José dos Campos, Brazil

Alexandre Luiz Souto Borges , Universidade Estadual Paulista “Júlio de Mesquita Filho”, Instituto de Ciência e Tecnologia, Departamento de Materiais Odontológicos e Prótese. São José dos Campos, SP, Brazil.

Department of Dental Materials and Prosthodontics, São José dos Campos, Brazil

João Maurício Ferraz da Silva, Universidade Estadual Paulista “Júlio de Mesquita Filho”, Instituto de Ciência e Tecnologia, Departamento de Materiais Odontológicos e Prótese. São José dos Campos, SP, Brazil.

Department of Dental Materials and Prosthodontics, São José dos Campos, Brazil

Eduardo Shigueyuki Uemura, Universidade Estadual Paulista “Júlio de Mesquita Filho”, Instituto de Ciência e Tecnologia, Departamento de Materiais Odontológicos e Prótese. São José dos Campos, SP, Brazil.

Department of Dental Materials and Prosthodontics, São José dos Campos, Brazil

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Published

2023-12-20

Issue

Section

Clinical or Laboratorial Research