ORIGINAL RESEARCH Journal of Dentomaxillofacial Science (J Dentomaxillofac Sci ) December 2017, Volume 2, Number 3: 180-182 P-ISSN.2503-0817, E-ISSN.2503-0825 180 © 2017 JDMFS. Published by Faculty of Dentistry, Hasanuddin University. All rights reserved. http://jdmfs.org CrossMark Abstract Objective: To investigate the effect of soaking of thermoplastic nylon (valplast) in clove flower extract (syzygium aromaticum) as a denture cleanser with different concentrations: 0.8%, 1%, 1.2%, 1.4% and 1.6% to the color change of thermoplastic nylon. Material and Methods: As many as 30 samples were divided into 6 groups. The sample size was 10×10×1 mm. The first group was immersed in sterile aquades and the other groups were immersed in clove flower extracts with concentrations at 0.8%, 1%, 1.2%, 1.4% and 1.6% for 12 days. The light intensity was then measured using densitometer. Results: One-way ANOVA test results obtained a value of 0.174 (p > 0.05), which indicates there is no significant difference between the groups. Conclusions: Thus it is concluded that darker discoloration occurs in the thermoplastic nylon at a concentration of 1.6% and lighter discoloration occurs at a lower concentration of 0.8%. Keywords: Clove flower extract, Color changes, Thermoplastic nylon Cite this Article: Wibawaningtyas N, Kristiana D, Probosari N. 2017. The effect of the thermoplastic nilon enterprises (valplast) on clove extract (syzygium aromaticum) in various concentrations on the color change. Journal of Dentomaxillofacial Science 2(3): 180-182. DOI: 10.15562/jdmfs. v2i3.645 The effect of the thermoplastic nilon enterprises (valplast) on clove extract (syzygium aromaticum) in various concentrations on the color change Niken Wibawaningtyas 1* , Dewi Kristiana 1 , Niken Probosari 2 Introduction Te artifcial tooth base is a part of the artifcial tooth attached to the supporting tissue and where the adhesive of the artifcial tooth is applied. 1 In the denture base material, the denture is of two types: thermo-hardening and thermo-plastic. Termo-hardening-type denture base material is a type of material that undergoes chemical changes in the formation process, whereas the thermo-plastic-type material (e.g., celluloid, cellulose nitrate, vinyl resin, polycarbonate, and nylon) goes through non-chemical changes in the formation process. Te thermoplastic nylon (valplast) was frst introduced in the feld of dentistry in 1950. 2 Te use of thermoplastic nylon has both advantages and disadvantages. Te advantages include good aesthetics, high fexibility, good transparency and so on; such advantages help with creating a color-matching efect, that is, the denture base color is identical to the color of the underlying tissue; another advantage of valplast is that it is biocom- patible and has low water solubility. While the shortcomings of thermoplastic nylon are, among other things, difculty in hulling and hygroscopy, which can cause discoloration. 3 Te color change that occurs in thermoplastic nylon can be caused by both intrinsic and extrinsic factors. Te intrinsic factor is a chemical change in the material itself caused by an imperfect poly- merization process, whereas the extrinsic factor is staining caused by the absorption of pigment dyes from the exogenous source of tea, cofee, mouth rinses and artifcial dental cleansing solution. Inadequate patterns of artifcial dentures and poor oral hygiene can lead to an increase in the number of candida albicans colonies and cause infammation of the oral mucosa that afects the denture quality and stability. 4 Tis infammation is called denture stomatitis. To prevent the occurrence of denture stomatitis the patient must be advised to properly maintain denture and oral hygiene. To maintain denture hygiene denture must be cleaned using a cleanser or by brushing the parts of artifcial teeth. 5 Immersion of artifcial tooth in denture cleanser is divided into phases:, a. short-term immersion lasting 15-45 minutes during bath or afer meals and long-term immersion lasting 6–8 hours at rest. 6 In the year 2002, WHO had frst recommended and validated the use of traditional crops as a drug. 7 One of them is cloves; cloves contain essential oils (eugenol), favonoids and tannins that have antifungal properties. 8,9 In addition to having the antifungal properties, favonoids and tannins also have natural plant pigments that can cause color changes. Based on previous research on the efect 1 Department of Prosthodontics, Faculty of Dentistry, University of Jember, Jember, Indonesia 2 Department of Pediatrics, Faculty of Dentistry, University of Jember, Jember, Indonesia * Corresponding to: Niken Wibawaningtyas, Department of Prosthodontics, Faculty of Dentistry, University of Jember, Jember, Indonesia nikenwibawaningtyas@gmail.com Received: 15 November 2017 Revised: 25 November 2017 Accepted: 26 November 2017 Available online: 1 December 2017