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All Journal Padjadjaran Journal of Dentistry SENTRI: Jurnal Riset Ilmiah
Akwan, Yulie Emilda
Department Of Pediatric Dentistry, Faculty Of Dentistry, Universitas Hang Tuah
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Cocos nucifera l. (coir) fiber application as a filler and its effect on the volumetric shrinkage of flowable composite resin: an in vitro study cevanti, Twi agnita; Tameno, Yolanda Agustina; Mawarani, Lizda Johar; Akwan, Yulie Emilda; Prananingrum, Widyasri; Son, Meekyoung
Padjadjaran Journal of Dentistry Vol 37, No 1 (2025): March 2025
Publisher : Faculty of Dentistry Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/pjd.vol37no1.58864

Abstract

Introduction: The use of composite resin as a restorative material has the disadvantage of experiencing volumetric shrinkage during polymerization, which can lead to restoration failure. Fiber-reinforced composites can reduce volumetric shrinkage in restorative materials. Coir fiber has the potential to replace synthetic fillers because its hollow fiber structure resembles foam, supporting a compact yet lightweight structure. This characteristic is expected to reduce the volumetric shrinkage of composite resin. This study aims to analyze the effect of coir fiber application as a filler on flowable composite resin on shrinkage, comparing it with flowable composite resin containing synthetic filler. Methods: The cellulose fiber used as a filler was synthesized from coir, while the matrix consisted of BisGMA and TEGDMA resins in a ratio 5:1. The composite was prepared with a coir fiber-to-matrix resin composition of 70:30, and polymerization was carried out by irradiation for 40 seconds. Volumetric shrinkage was tested 90 minutes after irradiation. The dimensions of the composite sample were measured from images captured using a digital microscope and analyzed with ImageJ software. The volume shrinkage was then calculated based on these dimensions. Shrinkage was further confirmed through SEM analysis of marginal adaptation tests. Results: The application of coir fiber as a filler effectively reduced the volumetric shrinkage of the composite compared to the composites with synthetic filler. Statistical analyses using the Mann-Whitney test results indicated that the type of filler in flowable composite resin had a significant effect, with a p-value of 0.047 (p<0.05). Conclusion: Application of coconut fiber as filler in flowable composite resin significantly reduce volumetric shrinkage, making it three times smaller than that of flowable composite resin with a synthetic filler.
Edukasi dan Motivasi Pemeliharaan Kesehatan Rongga Mulut dengan Sikat Gigi Kustom Modifikasi pada Siswa SLB YPAC Surabaya Soesilo, Diana; Akwan, Yulie Emilda; Syanti, Wanda Rahma
SENTRI: Jurnal Riset Ilmiah Vol. 4 No. 11 (2025): SENTRI : Jurnal Riset Ilmiah, November 2025
Publisher : LPPM Institut Pendidikan Nusantara Global

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55681/sentri.v4i11.4958

Abstract

SLB YPAC Surabaya is a school for students with disabilities, particularly those with cerebral palsy, who experience motor limitations and therefore require specially adapted tools for maintaining oral health. To support oral hygiene, a three-sided toothbrush was used, allowing simultaneous cleaning of the buccal, occlusal, and lingual/palatal surfaces, with the handle modified using child-safe clay that is inexpensive, easy to shape, and readily available. Oral hygiene was assessed using plaque index scores with a plaque detector and halitosis scores with a halitosis detector, and both students and their assistants were taught how to create the customized toothbrush handle. Parents’ knowledge was measured through pre- and post-tests, while students’ oral health was evaluated through plaque and halitosis indices. Wilcoxon tests showed significant differences in parental knowledge (p=0.000) and in plaque and halitosis scores before and after using the modified toothbrush (p=0.002; p<0.05), indicating clear improvement. Therefore, the use of a three-sided toothbrush with a clay-based customized handle is effective in enhancing the oral hygiene of students with cerebral palsy.
Co-Authors Diana Soesilo, Diana Juniar, Eriza Lizda Johar Mawarani Paramita, Ayulistya Son, Meekyoung Tameno, Yolanda Agustina Twi Agnita Cevanti Wanda Rahma Syanti Widyasri Prananingrum