Influence of Thermocycling and Sealer Coating Application on Shore Hardness of Soft Denture Lining Material

Ismet  Danial Nasution; Haslinda Z.  Tamin; Ariyani Ariyani; Ivana Ivana

doi:10.3889/oamjms.2021.7265

Authors

Ismet Danial Nasution Department of Prosthodontic, Faculty of Dentistry, Universitas Sumatera Utara, Medan 20155, Indonesia
Haslinda Z. Tamin Department of Prosthodontic, Faculty of Dentistry, Universitas Sumatera Utara, Medan 20155, Indonesia
Ariyani Ariyani Department of Prosthodontic, Faculty of Dentistry, Universitas Sumatera Utara, Medan 20155, Indonesia
Ivana Ivana Department of Prosthodontic, Faculty of Dentistry, Universitas Sumatera Utara, Medan 20155, Indonesia

DOI:

https://doi.org/10.3889/oamjms.2021.7265

Keywords:

Soft denture lining, Sealer coating, Thermocycling, Hardness

Abstract

BACKGROUND: One of the properties of the soft denture lining (SDL) material that needed to overcome the functional problems is softness. Loss of softness due to the aging process and to extend the duration of use, sealer coating was developed to maintain its softness. Sealer coating acts as mechanical barrier to provide protection against aging of SDL materials.

AIM: This study aims to determine the influence of thermocycling and sealer coating application on the shore hardness of the acrylic-based and silicone-based auto-polymerizing soft denture lining materials.

MATERIALS AND METHODS: Materials that were used in this study are acrylic-based auto-polymerizing SDL (Durabase Soft, Reliance Dental Manufacturing LLC, Illinois, USA) and silicone-based auto-polymerizing SDL (Mollosil, Detax GmbH, Ettlingen, Germany). In this study, we used monopoly as sealer coating for acrylic-based auto-polymerizing SDL and varnish for silicone-based auto-polymerizing SDL. Thermocycling was performed for 2000 cycles for a 2-year simulation time. For shore hardness test, a total of 40 discs shaped samples were made with a diameter of 35 mm and a thickness of 6 mm. The samples were divided into eight groups (n = 5), namely, the uncoated and non-thermocycling acrylic-based auto-polymerizing SDL, the coated and non-thermocycling acrylic-based auto-polymerizing SDL, the uncoated and thermocycling acrylic-based auto-polymerizing SDL, the coated and thermocycling acrylic-based auto-polymerizing SDL, the uncoated and non-thermocycling silicone-based auto-polymerizing SDL, the coated and non-thermocycling silicone-based auto-polymerizing SDL, the uncoated and thermocycling silicone-based auto-polymerizing SDL, and the coated and thermocycling silicone-based auto-polymerizing SDL. The hardness test was carried out using the shore A durometer.

RESULTS: The obtained data were tested using the independent t-test with a significance level of p < 0.05. The results showed that there was a significant effect between coated and uncoated acrylic-based SDL group that underwent thermocycling and in the silicone-based SDL group. The study showed that the hardness value was lower in both coated acrylic-based and silicone-based SDL groups compared to the non-coated group, so it can be concluded that the sealer coating is able to protect the hardness of SDL material against aging with a thermocycling simulation. The results also showed that there was a significant effect of thermocycling on the hardness of the material both in the coated acrylic-based SDL group, the uncoated acrylic-based SDL group, and the uncoated silicone-based SDL group. Study also showed that there was no significant effect of thermocycling in the coated silicone-based SDL group.

CONCLUSION: Based on the results, it can be concluded that the use of sealer coating can maintain the hardness properties of both acrylic-based SDL and silicon-based self-polymerizing SDL so that it can increase the durability of SDL materials. However, the effect of sealer coating in protecting the hardness of SDL materials against aging was more evident in the silicone-based SDL group.

Downloads

Download data is not yet available.

Metrics

Metrics Loading ...

Plum Analytics Artifact Widget Block

References

Pisani MX, Segundo AL, Leite VM, de Souza RF, da Silva MA, da Silva CH. Electromyography of masticatory muscles after denture relining with soft and hard denture liners. J Oral Sci. 2013;55(3):217-24. https://doi.org/10.2334/josnusd.55.217 PMid:24042588 DOI: https://doi.org/10.2334/josnusd.55.217

Palla ES, Karaoglani E, Naka O, Anastassiadou V. Soft denture liners’ effect on the masticatory function in patients wearing complete dentures: A systematic review. J Dent. 2015;43(12):1403-10. https://doi.org/10.1016/j.jdent.2015.09.005 PMid:26404406 DOI: https://doi.org/10.1016/j.jdent.2015.09.005

Kutlu IU, Yanikoğlu ND, Kul E, Duymuş ZY, Sağsöz NP. Effect of sealer coating and storage methods on the surface roughness of soft liners. J Prosthet Dent. 2016;115(3):371-6. https://doi.org/10.1016/j.prosdent.2015.10.004 PMid:26723099 DOI: https://doi.org/10.1016/j.prosdent.2015.10.004

Kim BJ, Yang HS, Chun MG, Park YJ. Shore hardness and tensile bond strength of long-term soft denture lining materials. J Prosthet Dent. 2014;112(5):1289-97. https://doi.org/10.1016/j.prosdent.2014.04.018 PMid:24882597 DOI: https://doi.org/10.1016/j.prosdent.2014.04.018

Ogawa A, Kimoto S, Saeki H, Ono M, Furuse N, Kawai Y. The influence of patient characteristics on acrylic-based resilient denture liners embedded in maxillary complete dentures. J Prosthodont Res. 2016:60(3):199-205. https://doi.org/10.1016/j.jpor.2015.12.001 PMid:26778580 DOI: https://doi.org/10.1016/j.jpor.2015.12.001

Da Silva J, Takahashi J, Nuňez J, Consani R, Mesquita M. Effect of accelerated aging and surface sealing on the permanent deformation of auto-polymerising soft linings. Gerodontology. 2010;29(3):188-93. https://doi.org/10.1111/j.1741-2358.2010.00419.x PMid:20825497 DOI: https://doi.org/10.1111/j.1741-2358.2010.00419.x

Murata H, Hamada T, Sadamori S. Relationship between viscoelastic properties of soft denture liners and clinical efficacy. Jpn Dent Sci Rev. 2008;44:128-32. https://doi.org/10.1016/j.jdsr.2008.06.001 DOI: https://doi.org/10.1016/j.jdsr.2008.06.001

Kimoto S, Yamamoto S, Shinomiya M, Kawai Y. Randomized controlled trial to investigate how acrylic-based resilient liner affects on masticatory ability of complete denture wearers. J Oral Rehabil. 2010;37(7):553-9. https://doi.org/10.1111/j.1365-2842.2010.02070.x PMid:20202095 DOI: https://doi.org/10.1111/j.1365-2842.2010.02070.x

Dayrell A, Takahashi J, Valverde G, Consani R, Ambrosano G, Mesquita M. Effect of sealer coating on mechanical and physical properties of permanent soft lining materials. Gerodontology. 2012;29(2):e401-7. https://doi.org/10.1111/j.1741-2358.2011.00487.x PMid:21535103 DOI: https://doi.org/10.1111/j.1741-2358.2011.00487.x

Rodrigues S, Shenoy V, Shetty T. Resilient liners: A review. J. Indian Prosthodont Soc. 2013;13(3):155-64. PMid:24431729

Jabbal R, Datta K. Comparative evaluation of water sorption and solubility of two autopolymerizing soft denture liners in distilled water and artificial saliva. Indian J Dent Sci. 2016;8:208. https://doi.org/10.4103/0976-4003.196811 DOI: https://doi.org/10.4103/0976-4003.196811

Gronet PM, Driscoll CF, Hondrum SO. Resiliency of surface-sealed temporary soft denture liners. J Prosthet Dent. 1997;77(4):370-4. https://doi.org/10.1016/s0022-3913(97)70161-6 PMid:9104713 DOI: https://doi.org/10.1016/S0022-3913(97)70161-6

Mancuso DN, Goiato MC, Carolina B, Zuccolotti R, Micheline D. Effect of thermocycling on hardness, absorption, solubility and color change of soft liners. Gerontology 2010;29(2):e215-9. https://doi.org/10.1111/j.1741-2358.2010.00447.x PMid:21083743 DOI: https://doi.org/10.1111/j.1741-2358.2010.00447.x

Hermann C, Mesquita MF, Consani RL, Henriques GE. The effect of aging by thermal cycling and mechanical brushing on resilient denture liner hardness and roughness. J Prosthodont. 2008;17(4):318-22. https://doi.org/10.1111/j.1532-849x.2007.00293.x PMid:18266656 DOI: https://doi.org/10.1111/j.1532-849X.2007.00293.x

Goiato MC, Zucolotti BC, dos Santos DM, Moreno A, Alves- Rezende MC. Effects of thermocycling on mechanical properties of soft lining materials. Acta Odontol Latinoam. 2009;22:227-232.

Mainieri VC, Beck J, Oshima HM, Hirakata LM, Shinkai RS. Surface changes in denture soft liners with and without sealer coating following abrasion with mechanical brushing. Gerodontology. 2011;28(2):146-51. https://doi.org/10.1111/j.1741-2358.2010.00375.x PMid:21054504 DOI: https://doi.org/10.1111/j.1741-2358.2010.00375.x

Malmström HS, Mehta N, Sanchez R, Moss ME. The effect of two different coatings on the surface integrity and softness of a tissue conditioner. J Prosthet Dent. 2002;87(2):153-7. https://doi.org/10.1067/mpr.2002.121407 PMid:11854670 DOI: https://doi.org/10.1067/mpr.2002.121407

Raval HJ, Mahajan N, Naveen YG, Sethuraman R. A three month comparative evaluation of the effect of different surface treatment agents on the surface integrity and softness of acrylic based soft liner: An in vivo study. J Clin Diagn Res. 2017;11(9):88-91. https://doi.org/10.7860/jcdr/2017/28604.10680 PMid:29207842 DOI: https://doi.org/10.7860/JCDR/2017/28604.10680

Ebadian B, Navarchian AH, Sedighipour L. The effect of surface coating on softness of two kinds of tissue. Dent Res J (Isfahan). 2006;3(1):1-6.

Hristov I, Slavchev D, Yankov S, Chuchulska B, Zlatev S. Influence of different ways of treatment on hardness of soft relining materials. Int J Sci Res. 2017;6:1769-72. https://doi.org/10.21275/art20175562 DOI: https://doi.org/10.21275/ART20175562

Kiat-Amnuay S, Gettleman L, Mekayarajjananonth T, Khan Z, Goldsmith LJ. The influence of water storage on durometer hardness of 5 soft denture liners over time. J Prosthodont. 2005;14(1):19-24. https://doi.org/10.1111/j.1532-849x.2005.00002.x PMid:15733131 DOI: https://doi.org/10.1111/j.1532-849X.2005.00002.x