Revista de Odontologia da UNESP
https://revodontolunesp.com.br/article/588018b17f8c9d0a098b4d84
Revista de Odontologia da UNESP
Original Article

Effect of thermocycling on surface roughness of soft denture liners

Efeito da termociclagem sobre a rugosidade de reembasadores resilientes

Mendes, Bruna; Urban, Vanessa Migliorini; Campanha, Nara Hellen; Jorge, Janaina Habib

Downloads: 4
Views: 732

Abstract

Purpose: This study evaluated the effect of storage in water and thermocycling on roughness of reline materials. Material and method: Four reline materials (Ufi-gel P, Dentuflex, Trusoft and Dentusoft) were selected. The materials were prepared according to the manufacturers’ instructions and were placed in stainless steel moulds (20 mm in diameter and 5 mm thick). Five samples of each resin were made (n = 5) and roughness (Ra) analyses according to the following experimental conditions: GC (control group): immediately after specimen preparation; GA: after storage in distilled water at 37 °C for 24 hours; GT: after thermocycling. Data were submitted to 2-way ANOVA followed by Tukey’s test (α = 0.05). Result: Ufigel P resin had smaller surface roughness values (p = 0.000368) than the other ones. The initial period of evaluation (GC) and storage in water (GA) did not change roughness of the tested materials (p > 0.05). There was a significant increase in roughness after thermocycling only for Dentusoft (p = 0.000368). Conclusion: Thermocycling increased the roughness of the Dentusoft, with no change to the other materials.

Keywords

Acrylic resin, reline, roughness, thermal cycling

Resumo

Objetivo: Este estudo buscou avaliar o efeito do armazenamento em água e da termociclagem sobre a rugosidade de reembasadores resilientes. Material e método: Quatro reembasadores resilientes (Ufi-gel P, Dentuflex, Trusoft e Dentusoft) foram selecionados. Os materiais foram preparados de acordo com as instruções dos fabricantes e colocados em matrizes vazadas com 20 mm de diâmetro e 5 mm de espessura. Cinco corpos de prova de cada resina foram fabricados e a rugosidade superficial (Ra) foi avaliada de acordo com os seguintes grupos experimentais: GC (grupo controle): imediatamente após a confecção das amostras; GA: após armazenamento em água destilada a 37 °C por 24 horas; GT: após termociclagem. Os resultados foram submetidos à análise de variância de dois fatores, seguida do teste de Tukey (α = 0,05). Resultado: A resina Ufigel P apresentou menores valores de rugosidade (p = 0,000368) em relação aos outros materiais. No período inicial de avaliação (GC) e após 24 horas de armazenamento em água (GA), não houve alteração da rugosidade para todos os materiais testados (p > 0,05). Após a termociclagem, houve aumento significativo da rugosidade apenas para o reembasador Dentusoft (p = 0,000368). Conclusão: A ciclagem térmica aumentou os valores de rugosidade para a resina Dentusoft, não havendo qualquer alteração para os demais materiais.

Palavras-chave

Resina acrílica, reembasadores, rugosidade, termociclagem

References



1. Budtz-Jørgensen E. Prosthodontics for the elderly diagnosis and treatment. Chicago: Quintessence; 1999.

2. De Fiori SR. Atlas de prótese parcial removível. São Paulo: Paramed; 1983.

3. Murata H, Taguchi N, Hamada T, Kawamura M, McCabe JF. Dynamic viscoelasticity of soft liners and mastigatoy function. J Dent Res. 2002; 81: 123-8.

4. Braden, M. Tissue conditioners: I. Composition and structure. J Dent Res. 1970; 49: 145-8.

5. Nikawa H, Iwanaga H, Hamada T, Yuhta S. Effects of denture cleansers on direct soft denture lining materials. J Prosthet Dent. 1994; 72: 657-62.

6. McMordie R, King GE. Evaluation of primers used for bonding silicone to denture base materials. J Prosthet Dent. 1989; 61: 636-9.

7. Price C, Waters MG, Williams DW, Lewis MA, Stickler D. Surface modification of an experimental silicone rubber aimed at reducing initial candidal adhesion. J Biomed Mater Res. 2002; 63: 122-8.

8. Gronet PM, Driscoll CF, Hondrum SO. Resiliency of surface-sealed temporary soft denture liners. J Prosthet Dent. 1997; 77: 370-4.

9. Alves PV, Lima Filho RM, Telles E, Bolognese A. Surface roughness of acrylic resins after different curing and polishing techniques. Angle Orthod. 2007; 77: 528-31.

10. Kuhar M, Funduk N. Effects of polishing techniques on the surface roughness of acrylic denture base resins. J Prosthet Dent. 2005; 93: 76‑85.

11. Lima EM, Moura JS, Del Bel Cury AA, Garcia RC, Cury JA. Effect of enzymatic and NaOCl treatments on acrylic roughness and on biofilm accumulation. J Oral Rehabil 2006; 33: 356-62.

12. Machado AL, Breeding LC, Vergani CE, da Cruz Perez LE. Hardness and surface roughness of reline and denture base acrylic resins after repeated disinfection procedures. J Prosthet Dent. 2009; 102: 115-22.

13. Machado AL, Giampaolo ET, Vergani CE, Pavarina AC, Souza JF, Jorge JH. Changes in roughness of denture base and reline materials by chemical disinfection or microwave irradiation. J Appl Oral Sci. 2010 [Epub ahead of print].

14. Silva Filho C.E, Martins SEM, Sundfeld MLMM, Zequeto MM, Marchiori AV, Carvalho AM. Avaliação da rugosidade superficial de resinas acrílicas submetidas à ciclagem térmica. Rev Odontol Araçatuba. 2006; 27(1): 28-33.

15. Yilmaz A, Baydaş S. Fracture resistance of various temporary crown materials. J Contemp Dent Pract. 2007; 8(1): 44-51.

16. Botega DM, Sanchez JL, Mesquita MF, Henriques GE, Consani RL. Effects of thermocycling on the tensile bond strength of three permanent soft denture liners. J Prosthodont. 2008; 17: 550-4.

17. Goiato MC, Naves JC, Bressan RN, Santos DM, Fajardo RS, Fernandes AUR. Efeito de técnicas de polimento na porosidade e na dureza de resinas acrílicas submetidas a termociclagem. Rev Odontol UNESP. 2006; 35: 47-52.

18. Verran J, Maryan CJ. Retention of Candida albicans on acrylic resin and silicone of different surface topography. J Prosthet Dent. 1997; 77: 535-9.

19. Radford DR, Sweet SP, Challacombe SJ, Walter JD. Adherence of Candida albicans to denture-base materials with different surface finishes. J Dent. 1998; 26: 577-83.

20. Radford DR, Challacombe SJ, Walter JD. Denture plaque and adherence of Candida albicans to denture-base materials in vivo and in vitro. Crit Rev Oral Biol Med. 1999; 10: 99-116.

21. Quirynen M, Bollen CM. The influence of surface roughness and surface-free energy on supra- and subgingival plaque formation in man: a review of the literature. J Clin Periodontol. 1995; 22: 1-14.

22. Anusavice KJ. Phillip’s science of dental materials. 10th ed. Philadelphia: Saunders; 1996.

23. Graham BS, Jones DW, Burke J, Thompson JP. In vivo fungal presence and growth on two resilient denture liners. J Prosthet Dent. 1991; 65: 528-32.

24. Kazanji MNM, Watkinson AC. Soft lining materials: their absorption of, and solubility in, artificial saliva. Br Dent J. 1988; 165: 91-4.

25. Pinto JR, Mesquita MF, Henriques GE, de Arruda Nóbilo MA. Effect of thermocycling on bond strength and elasticity of 4 long-term soft denture liners. J Prosthet Dent. 2002; 88: 516-21.

26. Murata H, Taguchi N, Hamada T, McCabe JF. Dynamic viscoelastic properties and the age changes of long-term soft denture liners. Biomaterials. 2000; 21: 1421-7.

27. Parr GR, Rueggeberg FA. In vitro hardness, water sorption, and resin solubility of laboratory-processed and autopolymerized long-term resilient denture liners over one year of water storage. J Prosthet Dent. 2002; 88: 139-44.

28. Jin C, Nikawa H, Makihira S, Hamada T, Furukawa M, Murata H. Changes in surface roughness and colour stability of soft denture lining materials caused by denture cleansers. J Oral Rehabil. 2003, 30: 125-30.

29. Yoeli Z, Miller V, Zeltser C. Consistency and softness of soft liners. J Prosthet Dent. 1996; 75: 412-8.

30. Murata H, McCabe JF, Jepson NJ, Hamada T. The influence of immersion solutions on the viscoelasticity of temporary soft lining materials. Dent Mater. 1996; 12: 19-24.

31. Hong G, Li Y, Maeda T, Mizumachi W, Sadamori S, Hamada T, et al. Influence of storage methods on the surface roughness of tissue conditioners. Dent Mater J. 2008; 27: 153-8.

32. Jones DW, Hall GC, Sutow EJ, Langman MF, Robertson KN. Chemical and molecular weight analyses of prosthodontic soft polymers. J Dent Res. 1991; 70: 874-9.

33. Garcia RM, Léon BT, Oliveira VB, Del Bel Cury AA. Effect of a denture cleanser on weight, surface roughness, and tensile bond strength of two resilient denture liners. J Prosthet Dent. 2003; 89: 489-94.

34. Pinto JR, Mesquita MF, Nóbilo MA, Henriques GE. Evaluation of varying amounts of thermal cycling on bond strength and permanent deformation of two resilient denture liners. J Prosthet Dent. 2004; 92: 288-93.
588018b17f8c9d0a098b4d84 rou Articles
Links & Downloads

Rev. odontol. UNESP

Share this page
Page Sections