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Publisher: Peytchinski Publishing Ltd.
ISSN: 1312-773X (Online)
Issue: 2025, vol. 31, issue2
Subject Area: Dental Medicine
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DOI: 10.5272/jimab.2025312.6279
Published online: 17 June 2025
Original article
J of IMAB. 2025 Apr-Jun;31(2):6279-6283
EFFECT OF DIFFERENT CLEANING PROTOCOLS ON THE HARDNESS OF FLEXIBLE DENTURE BASE MATERIAL "THERMOSENS”
Rumen Radev1
, Nikolay Apostolov1, Elka Radeva2
,
1) Department of Prosthetic Dental Medicine, Faculty of Dental Medicine, Medical University – Sofia, Bulgaria.
2) Department of Conservative Dentistry, Faculty of Dental Medicine, Medical University – Sofia, Bulgaria.
ABSTRACT:
Introduction. The growing use of flexible dentures in everyday dental practice calls for further studies on how various disinfection methods influence their mechanical properties, particularly their hardness.
Purpose. The aim of the study was to evaluate how different cleaning techniques under varying conditions affect the hardness (HVN) of the "ThermoSens" denture base material.
Materials and Methods. Forty flexible denture samples, measuring 10 mm in width and 3 mm in height, were made and grouped into ten sets (T1-T10) based on the disinfection method applied. For 30 days, all samples were submerged in artificial saliva and cleaned with common products (soap, toothpaste, Protefix, and Corega tablets). Each sample was then evaluated in five surface areas using the Vickers hardness test, with the data statistically analyzed using IBM SPSS Statistics 26, Excel 2015, and EdrawMax 7.
Results. No statistically significant difference was found between the individual groups using different disinfection methods and protocols compared to the control group. Only in group 2, daily cleaning with Corega tablets (9.3 HVN) resulted in a statistically significant increase in hardness compared to the control group.When comparing experimental group 2 with the other groups, a statistically significant difference was found with all groups except group 3 (9.0 HVN) and group 4 (9.1 HVN). Groups 2, 3, and 4 exhibited the highest hardness.
Conclusion. The use of different conventional cleaning methods does not alter the hardness of the flexible ThermoSens denture base material.
Keywords: disinfection, flexible denture, hardness, polyamide, ThermoSens,
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Please cite this article as: Radev R, Apostolov N, Radeva E. Effect of Different Cleaning Protocols on the Hardness of Flexible Denture Base Material “Thermosens”. J of IMAB. 2025 Apr-Jun;31(2):6279-6283. [Crossref - 10.5272/jimab.2025312.6279]
Correspondence to: Assoc. Prof. Elka Radeva, PhD, Department of Conservative Dentistry, Medical University-Sofia; 1, Georgi Sofijski Blvd., Sofia, Bulgaria; E-mail: eliradeva@abv.bg
REFERENCES:
1. Barraclough O, Gray D, Ali Z, Nattres B. Modern partial dentures - part 1: novel manufacturing techniques. Br Dent J. 2021 May;230(10):651–657. [PubMed]
2. Chuchulska B, Yankov S, Hristov I, Aleksandrov, S. Thermoplastic Materials in the Dental Practice: A Review. Int J Sci Research (IJSR). 2017 Dec;6(12):1074–1076. [Crossref]
3. Lim GS, Buzayan MM, Elkezza AH, Sekar K. The development of flexible denture materials and concept: a narrative review. Jummec. 2021; 24(1):23-29. [Internet]
4. Bana K, Shadab S, Hakeem S. Ilyas F. Comparing Oral Health-related Quality of Life (OHIP-14) and Masticatory Efficiency with Complete Denture Treatment. J Coll Physicians Surg Pak. 2021 Jun;31(6):694-698. [PubMed]
5. Gomaa A, Lamfon H, Maher Y. Microbiological and immunological effects of monomer free thermosens and nano zirconia oxide reinforced denture base resins on controlled diabetic denture wearers. Egypt Dent J. 2019 Jan;65(1):563-577. [Crossref]
6. Mylonas P, Milward P, McAndrew R. Denture cleanliness and hygiene: an overview. Br Dent J. 2022 Jul;233(1):20–26. [PubMed]
7. Ucar Y, Akova T, Aysan I. Mechanical Properties of Polyamide Versus Different PMMA Denture Base Materials. J Prosthodont. 2012 Apr;21(3):173–176. [PubMed]
8. Radev R, Apostolov N. Chemical structure of the flexible material Vertex "ThermoSens". Medinform.2025; 12(2):2053-2253. [Internet]
9. Mansour MM, Wagner WC, Chu TG. Effect of Mica Reinforcement on the Flexural Strength and Microhardness of Polymethyl Methacrylate Denture Resin. J Prosthodont. 2013 Apr;22(3):179–183. [PubMed]
10. 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 Aug;88(2):139–144. [PubMed]
11. Germak A, Herrmann K, Low S. Traceability in hardness measurements: from the definition to industry. Metrologia. 2010;47(2):S59–S66. [Crossref]
12. Li K, Xue D. Hardness of materials: studies at levels from atoms to crystals. Chin Sci Bull. 2009 Jan;54(1):131–136. [Crossref]
13. Duymus ZY, Ozdogan A, Ulu H, Ozbayram O. Evaluation the Vickers Hardness of Denture Base Materials. Open J Stomatol. 2016; 06(04):114–119. [Crossref]
14. Ozyilmaz OY, Akin C. Effect of cleansers on denture base resins' structural properties. J Appl Biomater Funct Mater. 2019 Jan-Mar;17(1):228080001982779. [PubMed]
15. Mofreh Altarawneh H, Nasser Alhajj M, Mohd Salleh N, Elkezza A, Adida Mahmood, W. Effect of Denture Cleanser on the Physico-Mechanical Properties of Injection-Molded Thermoplastic Polyamides Denture Base Material: A preliminary Study. Acta Stomatol Croat. 2023 Dec;57(4):329–338. [PubMed]
16. Tulbah HI. Anticandidal efficacy on polymide based denture resin using Photodynamic therapy, chemical and herbal disinfectants and their effect on surface roughness and hardness. Photodiagnosis Photodyn Ther. 2022 Sep;39:102874. [PubMed]
17. Pinto Lde R, Acosta EJ, Távora FF, da Silva PM, Porto VC. Effect of repeated cycles of chemical disinfection on the roughness and hardness of hard reline acrylic resins. Gerodontology. 2010 Jun;27(2):147-53. [PubMed]
18. Porwal A, Khandelwal M, Punia V, Sharma V. Effect of denture cleansers on color stability, surface roughness, and hardness of different denture base resins. J Indian Prosthodont Soc. 2017 Jan-Mar;17(1):61-67. [PubMed]
19. Durkan R, Ayaz EA, Bagis B, Gurbuz A, Ozturk N, Korkmaz FM. Comparative effects of denture cleansers on physical properties of polyamide and polymethyl methacrylate base polymers. Dent Mater J. 2013; 32(3):367-75. [PubMed]
20. Chang YH, Lee CY, Hsu MS, DU JK, Chen KK, Wu JH. Effect of toothbrush/dentifrice abrasion on weight variation, surface roughness, surface morphology and hardness of conventional and CAD/CAM denture base materials. Dent Mater J. 2021 Jan 31;40(1):220–227. [PubMed]
21. Panariello BH, Izumida FE, Moffa EB, Pavarina A, Jorge J, Giampaolo E. Effects of short-term immersion and brushing with different denture cleansers on the roughness, hardness, and color of two types of acrylic resin. Am J Dent. 2015 Jun;28(3):150-6. [PubMed]
Received: 13 January 2025
Published online: 17 June 2025