THE EFFECT OF ROBUSTA COFFEE ON THE COLOR STABILITY OF THERMOPLASTIC NYLON DENTURE BASE
Abstract
Introduction: Thermoplastic nylon is a flexible denture base material known for its excellent esthetics, making it a viable alternative for patients allergic to residual monomers or metals. However, its high water absorption rate may compromise color stability, a critical property for clinical longevity. Robusta coffee, a widely consumed beverage in South Sumatra, contains high concentrations of chromogenic agents that potentiallly induce significant staining. Aim: This study aimed to evaluate the effect of robusta coffee immersion and duration on the color stability of thermoplastic nylon denture base. Methods: This laboratory experimental study employed a pretest–posttest control group design. Thirty-two thermoplastic nylon specimens (20 × 3 mm) were divided into eight groups (n=4) and immersed in either robusta coffee or distilled water for 1, 3, 5, and 7 days. Color changes were quantified using a colorimeter. Data were analyzed using paired t-test, one-way ANOVA, and post hoc LSD tests ). Result: The paired t-test revealed significant changes in lightness (∆L) accross all groups(p<0.05. The highest mean color change (∆E) occurred in the 7-day robusta coffee immersion group (mean = 14.25), while the lowest was observed in the the 1-day distilled water group (mean = 9.68). Conclusion: Immersion in robusta coffee significantly affects the color stability of thermoplastic nylon. Furthermore, increased immersion duration correlates with a higher degree of discoloration.References
The Glossary of Prosthodontic Terms. The Journal
of Prosthetic Dentistry. 2017. 117:1–105.
Wahyuni S, Wijaya WP. Pengaruh penambahan
bahan kompatibilisasi pada nilon daur ulang
terhadap kekuatan fleksural basis gigi tiruan nilon
termoplastik. Bdent. 2019;6(1):42–8.
Binaljadm TM. Flexible denture: a literature
review. Cureus. 2024;16(3):1–10.
Vojdani M, Giti R. Polyamide as a denture base
material: a literature review. J Dent (Shiraz).
;16(1):1–9.
Ariyani A, Nasution ID, Agusnar H. Effect of
thermocycling and E-glass fiber addition on water
sorption and color stability of thermoplastic
nylon denture base material. IOSR.
;15(08):41–8.
Dimitrova M, Corsalini M, Kazakova R, Vlahova
A, Barile G, Dell’Olio F, et al. Color stability
determination of CAD/CAM milled and 3D
printed acrylic resins for denture bases: a narrative
review. J Compos Sci. 2022;6(7):201.
Wahyuni S, Ricca C. Pengaruh minuman teh pada
pemakai basis gigi tiruan nilon termoplastik
terhadap penyerapan air dan stabilitas warna. J
Ked Gi Unpad. 2020;32(1):66–71.
Widaningsih R. Outlook komoditas perkebunan
kopi [Internet]. Pusat Data dan Informasi
Pertanian Sekretariat Jendral Kementrian
Petanian; 2022. p11. Available from:
https://satudata.pertanian.go.id/details/
publikasi/354
Safitri R, Ramadani E, Oceani FP, Tanziha I.
Multidimensional Analysis of Changing Eating
Habits: Understanding the Coffee Shop
Phenomenon in Indonesia. Media Gizi Indonesia.
Jan 30;20(1):1–11.
Kasuma N, Putri YG, Lipoeto I. Pengaruh larutan
kopi bubuk robusta terhadap stabilitas warna pada
resin akrilik polimerisasi panas. Bdent.
;2(1):23–8.
Aditya I, Nocianitri K, Yusasrini N. Kajian
kandungan kafein kopi bubuk, nilai pH dan
karakteristik aroma dan rasa seduhan kopi jantan
(pea berry coffee) dan betina (flat beans coffee)
jenis arabika dan robusta. Jurnal ITEPA.
;5(1):1–12.
Rusyida DN, Arifin R, Nahzi MYI. The immersion
effect of 50% kasturi (mangifera casturi) leaf
extract on color changes of thermoplastic nylon
denture base. Dentino. 2023;8(1):6–10.
Nasution FAR, Tarigan S, Wahyuni S. Pengaruh
perendaman larutan ekstrak pandan wangi
(pandanus amaryllifolius roxb.) sebagai pembersih
pada bahan basis gigi tiruan nilon termoplastik
terhadap stabilitas warna: studi experimental.
Padjadjaran Journal of Dental Researchers and
Students. 2024;8(3):322–9.
Song SY, Kim KS, Lee JY, Shin SW. Physical
properties and color stability of injection-molded
thermoplastic denture base resins. J Adv
Prosthodont. 2019;11(1):32–40.
Hidayat R, Indrastuti M, Kusuma HA, Saleh S.
The effect of Tio2 coating and coffee immersion
on discoloration of thermoplastic nylon denture
base. Majalah Kedokteran Gigi Indonesia.
;4(3):161–6.
Arifin R, Putri VO, Dewi RK. The Color Change
Effect of Thermoplastic Nylon After Immersion in
% Kelakai (Stenochlaena Palustris) Leaf
Extract. Dentino. 2024;9(1):1–6.
Banu F, Athiramathy V, S S, V A, Jeyapalan K.
Comparative Evaluation of Color Stability of
Different Permanent Denture Base Materials: An
In Vitro Study. Cureus. 2020 Jan 22;12(1):e6698.
doi: 10.7759/cureus.6698
Jarwan RK. Dental Staining Associated with
Various Types of Coffee. Journal of Research in
Medical and Dental Science. 2022;10(9).
Peracini A, Regis RR, Souza RF, Pagnano VO,
Silva CH, Paranhos HF. Alkaline Peroxides
Versus Sodium Hypochlorite for Removing
Denture Biofilm: a Crossover Randomized Trial.
Braz Dent J. 2016 Oct-Dec;27(6):700-704. doi:
1590/0103-6440201600913.
Suhaimi FM, Mubarak MF, Roslan H, Razak
NAA, Omar AF. The effect of coloured beverages
on the colour stability of a flexible denture.
Malaysian Journal of Medicine & Health Sciences.
;15(9):109–15.
Downloads
Published
Issue
Section
License
Copyright (c) 2026 Martha Mozartha, Martha , Darma Tsari Faizah, Darma Tsari , Sri Wahyuningsih Rais, Sri Wahyuningsih
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Authors who publish with this journal agree to the following terms: Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
