Ratna Meidyawati
Department of Conservative Dentistry, Faculty of Dentistry, Universitas Indonesia, Jakarta 10430

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Effect of varnish coating agent application on surface hardness of glass ionomer cement after immersion in carbonated drinks Arsanti, Natasya; Megantoro, Aryo; Meidyawati, Ratna
Padjadjaran Journal of Dentistry Vol 35, No 1 (2023): March 2023
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/pjd.vol35no1.33139

Abstract

ABSTRACTIntroduction: Glass ionomer cement is a material for treating dental caries. The disadvantage of glass ionomer cement is that if it comes into contact with acids before maturation, there will be a decrease in mechanical properties which is indicated by a decrease in surface hardness. Surface hardness has a relationship with aesthetics and resistance to scratches that can cause fractures. Coating agents like varnishes are required for glass ionomer cement to protect them from liquids with low pH level, such as carbonated drinks. Unfortunately many dentists neglected this procedure. The purpose of this research was to compare the surface hardness of glass ionomer cement which is protected and not protected by coating agent when its maturation is in contact with acids, to emphasize the importance of this procedure. Methods: This research was a laboratory experimental study. Samples consist of 24 glass ionomer cement specimens (GC Fuji IX GP EXTRA). Glass ionomer cement specimens were divided into 4 treatment groups. The first group was not applied with varnish and stored without immersion, the second group was applied with varnish and stored in artificial saliva, the third group was applied with varnish and soaked in carbonated drinks, and the last group was not applied with varnish and was immersed in carbonated drinks. The data that has been collected was processed and analyzed using the computer-based application IBM SPSS Statistics version 23.0. Results: There was a significant increase in the surface hardness of glass ionomer cement in all treatment groups. There was a significant difference in the mean surface hardness of glass ionomer cement after immersion in carbonated drinks between the groups that were applied with varnish coating agent and that without application of varnish coating agent. Conclusion: The surface hardness of glass ionomer cement restoration which was applied with varnish coating agent has a higher value compared to those not applied with varnish coating agent after immersion on carbonated drinks.Keywords: carbonated drinks, glass ionomer cement, microhardness test; saliva, varnish coating agent
Effect of polishing paste on color stability of nanohybrid and spherical filler composite after immersion in black tea: a laboratory experiment Yasminadani, Widharaniputri; Meidyawati, Ratna; Kusumasari, Citra
Jurnal Kedokteran Gigi Universitas Padjadjaran Vol 36, No 3 (2024): Desember 2024
Publisher : Fakultas Kedokteran Gigi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jkg.v36i3.57127

Abstract

Introduction: The characteristics of the composite filler directly affect the surface roughness and susceptibility to extrinsic staining. An esthetic composite restoration depends on the color stability, that can be attributed to the low surface roughness. Therefore, it is crucial to apply appropriate polishing procedures. This study aim to analyze the effect of polishing paste on color stability of nanohybrid and spherical filler composite after immersion in black tea: a laboratory experiment. Method: Forty-two cylinder-shaped with a diameter of 6mm and a thickness of 2mm were prepared from nanohybrid (Filtek Z250XT) and spherical filler composite resin (Palfique Omnichroma), then divided into four sub-groups subjected to different polishing treatments and two control sub-groups without polishing. The groups were as follows: nanohybrid without polishing (N-K), spherical filler without polishing (SF-K), nanohybrid polished with discs (N-Pd), spherical filler polished with discs (SF-Pd), nanohybrid polished with discs followed by paste (N-PdP), and spherical filler polished with discs followed by paste (SF-PdP). Specimens were immersed in black tea for 7 days. The initial and final color were measured using a colorimeter. Data were analyzed using One-Way ANOVA and Tamhane's Post Hoc test. Results: Immersion in black tea solution resulted in clinically unacceptable color changes, except for the N-PdP group. The N-K group exhibited the highest ∆E* value, while the N-PdP group showed the smallest ∆E* value. Conclusion: The use of polishing paste reduced color changes in composite resin due to black tea. Nanohybrid composite resin polished with a disc followed by paste demonstrates better resistance to color changes.Pengaruh pasta poles terhadap stabilitas warna komposit dengan filler nanohybrid dan spherical setelah perendaman di dalam teh hitam: eksperimental laboratorisPendahuluan: Karakteristik filler resin komposit secara langsung mempengaruhi kekasaran permukaan dan kerentanan terhadap pewarnaan ekstrinsik. Restorasi resin komposit yang estetik bergantung pada stabilitas warna, yang berkaitan dengan kehalusan permukaan. Oleh karena itu, penerapan pemolesan yang tepat sangatlah penting dalam restorasi resin komposit. Penelitian ini bertujuan untuk menentukan pengaruh pasta poles terhadap stabilitas warna komposit nanohybrid dan spherical setelah perendaman dalam teh hitam. Metode: Empat puluh dua spesimen berbentuk silinder dengan diameter 6mm dan tebal 2mm dipersiapkan dari resin komposit nanohybrid (Filtek Z250XT) dan spherical filler (Palfique Omnichroma) kemudian dibagi ke dalam 4 subkelompok yang diberikan perlakuan pemolesan berbeda dan 2 sub kelompok kontrol tanpa pemolesan. Kelompok tersebut adalah: nanohybrid tanpa pemolesan (N-K), spherical filler tanpa pemolesan (SF-K), nanohybrid dipoles dengan disc (N-Pd), spherical filler dipoles dengan disc (SF-Pd), nanohybrid dipoles dengan disc diikuti pasta (N-PdP), dan spherical filler dipoles dengan disc diikuti pasta (SF-PdP). Spesimen direndam dalam teh hitam selama 7 hari. Warna awal dan akhir diukur menggunakan colorimeter. Data dianalisis menggunakan uji One-Way ANOVA dan Post Hoc Tamhane. Hasil: Perendaman dalam teh hitam menghasilkan perubahan warna yang tidak dapat diterima secara klinis, kecuali pada kelompok N-PdP. Kelompok N-K menunjukkan nilai ∆E* terbesar, sementara kelompok N-PdP menunjukkan nilai ∆E* terkecil. Simpulan: Penggunaan pasta poles mengurangi perubahan warna resin komposit akibat teh hitam. Resin komposit nanohybrid yang dipoles menggunakan disc diikuti pasta menunjukkan ketahanan yang lebih baik terhadap perubahan warna.
Matrix Metalloproteinase-9 (MMP-9) Levels in Dentinal Fluid as a Diagnostic Biomarker for Irreversible Pulpitis Megantoro, Aryo; Wairooy, Valeria Widita; Meidyawati, Ratna; Bachtiar, Endang Winiati
Journal of Dentistry Indonesia
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Objective: Pulpitis is an inflammatory condition of the dental pulp. The inflammatory status can be accurately assessed by histological examination. Biomarkers, such as matrix metalloproteinases (MMPs), are effective indicators of inflammation severity. Among these, matrix metalloproteinase-9 (MMP-9) has emerged as a key mediator of inflammatory processes associated with pulpitis. However, its clinical application as a biomarker remains limited owing to challenges in its extraction. This study aimed to evaluate the effectiveness of MMP-9 extracted from the dentinal fluid as a biomarker for pulpitis. Methods: Dentinal fluid was collected using the blunt tip of a sterile paper point, following clean excavation of the cavities. The paper point was placed in a sterile tube containing phosphate-buffered saline (PBS) and stored at −20 ºC. MMP-9 levels were analyzed using enzyme-linked immunosorbent assay (ELISA). Results: MMP-9 was detected in three of four patients diagnosed with irreversible pulpitis. Kruskal-Wallis test revealed a statistically significant difference in MMP-9 levels in the irreversible pulpitis group (p < 0.05). Conclusion: MMP-9 in dentinal fluid is a potential biomarker for irreversible pulpitis. However, further research is required to validate their diagnostic utility in clinical practice.