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Effect of chitosan as a coupling agent and types of stabiliser of zirconia filler on nanocomposite hardness Putri, Tansza Permata Setiana; Manurung, Rosida; Usri, Kosterman; Purwasasmita, Bambang Sunendar
Padjadjaran Journal of Dentistry Vol 30, No 1 (2018): March
Publisher : Faculty of Dentistry Universitas Padjadjaran, Indonesia

Introduction: Nanocomposite has been developed as a dental restoration. Nano-scale filler can result in high mechanical properties and good esthetic. Nanofiller materials such as partially stabilised zirconia (PSZ) has been recommended for dental use. This form of zirconia can be stabilised by the addition of several different oxides such as magnesia and calcia. Chitosan as a coupling agent was able to increase the nanocompositeâs mechanical properties. The purpose of this research was to evaluate the nanocompositeâs hardness value with and without the addition of chitosan as a coupling agent as well as a different stabiliser of zirconia filler. Methods: Procedures of this research consisted of several stages which were the fabrication of nanocomposite and mechanical properties measurement using the Vickerâs hardness testing. Results: The nanocompositeâs hardness value (kg/mm2) with zirconia filler stabilised by MgO without the addition of chitosan was as much as 5.09 and with the addition of chitosan was 7.51; the nanocomposite âs hardness number with zirconia filler stabilised by Â CaO without the addition of chitosan was 8.16 and with the addition of chitosan was 13.13. Â The results were then analysed statistically using the Analysis of Variance (ANOVA) test and showed a significant difference between all of those data groups. Conclusion: The addition of chitosan as well as different stabiliser (MgO and CaO)Â of Zirconia filler had affected the nanocomposite âs hardness value.

The comparison of color stability between thermoplastic nylon resin and heat-cured acrylic resin after tea-soaking using spectrophotometer Lestari, Lisa Putri; Usri, Kosterman; Febrida, Renny
Padjadjaran Journal of Dentistry Vol 21, No 3 (2009): November
Publisher : Faculty of Dentistry Universitas Padjadjaran, Indonesia

Color stability is one of the denture base material requirement. Nowadays, nylon thermoplastic resin and heat-cured acrylic resin which is used as denture base materials can be changed in colour. One of a colour-changed factor is the tea drinking habit. The objective of this research was to compare the colour stability between nylon thermoplastic resin and heat-cured acrylic resin after soaked in tea. Materials used for the research were nylon thermoplastic resin from Valplast and heat-cured acrylic resin QC-20, with a sample size of 64x(10Â±0.03)x(2.5Â±0.03)mm. The sample would be assessed of colour stability after the denture base soaked in tea for 7 days. The colour measurement of each sample was done by spectrophotometer equipment (CIE lab system). Data gathered later on statistically processed with ANOVA testing. The result showed that the comparison ratio of colour stability between nylon thermoplastic resin and heat-cured acrylic resin after soaked in tea was 1.9886:1.1152. The conclusion was that colour stability in the nylon thermoplastic resin was lower than heat-cured acrylic resin after soaked in tea. This result was due to a polymer chain of nylon thermoplastic which was lower than heat-cured acrylic resin and its porosity which was higher, so tea easily soaked into the materials.

Perbandingan Titik Lunak Resin Damar Mata Kucing dengan Resin Damar Batu Suherbowo, Natania Ramadhiani; Usri, Kosterman; Hidayat, Opik Taopik
Jurnal Material Kedokteran Gigi Vol 9 No 2 (2020): JMKG Vol 9 No 2 September 2020
Publisher : Ikatan Peminat Ilmu Material dan Alat Kedokteran Gigi (IPAMAGI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32793/jmkg.v9i2.593

Resin is widely used in dentistry these days. But synthetic resin is mostly used, because natural resin production is considered expensive in western countries. Meanwhile Indonesia has potential natural resources and one of the worldâ€™s natural resin producers. Dammar resin is one of them, there are two kinds considered the best which is mata kucing dammar resin and batu dammar resin. There are different characteristics between the two resin because they came from different tree species. This research, Difference in Softening Point of Mata Kucing Dammar Resin and Batu Dammar Resin, aims to determine the difference in the softening point of the two dammar resin so we can discover the use of dammar resin as one of the basic dental materials. Softening point test was done on 16 samples of mata kucing dammar resin and 16 samples of batu dammar resin using Ring and Ball Apparatus based on SNI 01-2900-1999. From the study results, it is obtained that the softening point of mata kucing dammar resin is 87-90Â°C, meanwhile batu dammar resin is 150-160Â°C. Softening point is the temperature which when dammar resin starts to transform into semisolid. A high softening point temperature shows that the dammar resin has long hardened because the compound chemical bond is reduced as a result of oxidation reaction. Mata Kucing dammar resin is yellowish-clear is gotten by tapping directly into the Shorea javanica tree, meanwhile the batu dammar resin which is brownish-black is gotten by collecting the fossilized sap on the ground beneath the Shorea eximia tree. Therefore, the mata kucing dammar resin has less ash and dirt content. Mata kucing dammar resin and batu dammar resin have different softening point temperature.

Berbagai pertimbangan dokter gigi dalam memilih produk bahan tambal: studi observasional Harlinton, Andrian Jonathan; Usri, Kosterman; Takarini, Veni
Padjadjaran Journal of Dental Researchers and Students Vol 7, No 2 (2023): Juni 2023
Publisher : Fakultas Kedokteran Gigi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/pjdrs.v7i2.41086

ABSTRAKPendahuluan: Dokter gigi sebagai pengguna dan pembeli produk bahan tambal tentunya memiliki berbagai pertimbangan dalam memilih produk bahan tambal yang akan digunakan dalam merawat pasien. Terdapat beberapa pertimbangan yang dipikirkan oleh dokter gigi saat memilih suatu produk material bahan tambal, diantaranya yaitu pertimbangan kualitas, pertimbangan harga dan pertimbangan-pertimbangan lainnya. Penelitian ini bertujuan untuk melihat gambaran dari berbagai pertimbangan dokter gigi dalam memilih produk bahan tambal. Metode: Jenis penelitian ini merupakan penelitian deskriptif yang menggunakan teknik sampel insidental. Populasi penelitian ini adalah seluruh dokter gigi yang terdaftar pada organisasi PDGI Kota Bandung, dengan sampel berjumlah 315 dokter gigi. Penelitian ini menggunakan kuesioner daring yang berisi 10 butir pertanyaan mengenai berbagai pertimbangan dari dokter gigi dalam memilih suatu produk bahan tambal, yang menggunakan skala Likert dengan skor 1-5. Uji validitas dari penelitian ini menggunakan uji bivariate pearson, sedangkan untuk uji reliabilitas menggunakan uji test-retest. Hasil: Setelah kuesioner dibagikan ke seluruh sampel, skor Likert yang didapatkan dihitung reratanya menggunakan microsoft excel. Secara berurutan berbagai pertimbangan dan skor Likert reratanya adalah: kualitas bahan tambal (4,83), kemudahan aplikasi (4,58), biokompatibilitas (4,56), ketersediaan (4,28), harga (4,18), pilihan personal (4,03), ulasan (4,00), diskon (3,60), merek (3,58), kemasan (2,97). Simpulan: pada penelitian kali ini penulis menyimpulkan pertimbangan kualitas, biokompatibilitas dan kemudahan aplikasi dari bahan tambal, merupakan 3 pertimbangan utama yang mempengaruhi dokter gigi dalam memilih suatu produk bahan tambal gigi. Sedangkan pertimbangan kemasan produk merupakan pertimbangan yang kurang diperhatikan oleh dokter gigi saat memilih suatu produk bahan tambal.KATA KUNCI: bahan tambal gigi, pertimbangan, pemilihan produkDentists' Considerations in Choosing Dental Filling Material Products: observational StudyABSTRACTIntroduction: Dentists as users and buyers of filling material products have various considerations in choosing filling material products to treat their patients. Several considerations are made by dentists when selecting and purchasing a filling material product, including quality considerations, price considerations, and other considerations. This research intends to see the overview of various considerations used by dentists in choosing dental fillings product. Methods: The type of this research is descriptive research using incidental sampling techniques. The population of this study were all dentists registered within the organization of PDGI in the City of Bandung, with a sample of 315 dentists. This research used an online questionnaire containing 10 Likert scale questions regarding various considerations from dentists in choosing a filling material product, with a score of 1-5. The validity test of this research used bivariate pearson, while the reliability test used test-retest Results: After the questionnaires were distributed to all samples, the Likert scores obtained were averaged using Microsoft Excel. Sequentially the various considerations and their average Likert score are: quality of filling material (4.83), ease of application (4.58), biocompatibility (4.56), availability (4.28), price (4.18), personal preference (4.03), product reviews (4.00), discounts (3.60), brands (3.58), and packaging (2.97). Conclusion: in this research the authors conclude that considerations of quality, biocompatibility, and ease of application in dental filling material products are the 3 main considerations that influence dentists in choosing a dental filling product. Meanwhile, consideration of product packaging is a consideration that dentists pay little attention to when choosing a product for dental filling materials.KEY WORDS: dental filling material, choosing product, considerations

Differences of Micro-CT evaluation of the obturation sealing capability between thermoplastic carrier-based condensing techniques and lateral heat condensation techniques Amida, Aya; Aripin, Dudi; Hayati, Ayu Trisna; Latief, Fourier Dzar Eljabbar; Djustiana, Nina; Cahyanto, Arief; Usri, Kosterman; Tjahajawati, Sri; Mariam, Marry Siti; Widyaputra, Sunardhi
Padjadjaran Journal of Dentistry Vol 34, No 2 (2022): July
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/pjd.vol34no2.41384

ABSTRACT Introduction: Root canal filling is an important part of root canal treatment that aimed to seal the root canal system, to prevent bacterial penetration and their toxins into periradicular tissues and to provide favourable environment for periapical healing. Thermoplasticized technique were developed to produce filling with homogenous mass, to achieve optimal sealing ability and to increase the quality of root canal filling. The aim of this study is to analyzed differences of Micro-Computed Tomography (Micro-CT) evaluation of the obturation sealing capability between thermoplastic carrier-based condensing techniques and lateral heat condensation techniques. Methods: This study was conducted under an in-vitro quasi experimental methode to 36 specimens of maxillaris centralis incisivus which were divided to 3 groups, (A) thermoplasticized carrier-based technique (GuttaCore System), (B) warm lateral condensation technique (heat carrier SystemB), (C) cold lateral condensation as control group. Sealing ability is evaluated based on the measurement results of volume percentages of filling material and sealer, volume of void, and surface density, that which was calculated from the 3D volumetric image of Micro-CT device. Data were statistically analysed using Analisis of Variance (ANOVA) and t-test. Result: The result showed significant difference of percentage filling material and sealer volume in apical third (p<0.05), whereas there were no significant differences of void volume in apical third, middle third, coronal third or along the canal (p>0.05). Conclusion: Thermoplastized carrier-based technique is not better than warm lateral technique.Keywords: sealing ability; root canal filling; thermoplasticized carrier-based technique; warm lateral technique.

Effect of chitosan as a coupling agent and types of stabiliser of zirconia filler on nanocomposite hardness Putri, Tansza Permata Setiana; Manurung, Rosida; Usri, Kosterman; Purwasasmita, Bambang Sunendar
Padjadjaran Journal of Dentistry Vol 30, No 1 (2018): March 2018
Publisher : Universitas Padjadjaran

Introduction: Nanocomposite has been developed as a dental restoration. Nano-scale filler can result in high mechanical properties and good esthetic. Nanofiller materials such as partially stabilised zirconia (PSZ) has been recommended for dental use. This form of zirconia can be stabilised by the addition of several different oxides such as magnesia and calcia. Chitosan as a coupling agent was able to increase the nanocomposite’s mechanical properties. The purpose of this research was to evaluate the nanocomposite’s hardness value with and without the addition of chitosan as a coupling agent as well as a different stabiliser of zirconia filler. Methods: Procedures of this research consisted of several stages which were the fabrication of nanocomposite and mechanical properties measurement using the Vicker’s hardness testing. Results: The nanocomposite’s hardness value (kg/mm2) with zirconia filler stabilised by MgO without the addition of chitosan was as much as 5.09 and with the addition of chitosan was 7.51; the nanocomposite ’s hardness number with zirconia filler stabilised by CaO without the addition of chitosan was 8.16 and with the addition of chitosan was 13.13. The results were then analysed statistically using the Analysis of Variance (ANOVA) test and showed a significant difference between all of those data groups. Conclusion: The addition of chitosan as well as different stabiliser (MgO and CaO) of Zirconia filler had affected the nanocomposite ’s hardness value.

Comparison of nanocomposite colour particle stability after immersion in black tea and green tea Pramudiyanti, Nindya; Febrida, Renny; Usri, Kosterman
Padjadjaran Journal of Dentistry Vol 27, No 1 (2015): March 2015
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/pjd.vol27no1.26687

Introduction: Restorations using composite resins have to meet several requirements, one of which is stable against discoloration. Unfortunately discoloration may happen to this kind of restoration, and one of the causes is the tea habit. This research was to compare the color stability of nano particle composite after soaked in black tea and green tea. Methods: The research method was a laboratory experiment using nano particle composite as samples. It was conducted to 15 samples in cylindrical shape with diameter of 7 mm and thickness of 2 mm. Samples were divided in to 3 groups, each group consists of 5 samples. The first group soaked in black tea, the second group soaked in green tea and the last one soaked in mineral water for 7 days. Color measurements were obtained by using spectrophotometer (CIE lab system) and color differences (∆E) were estimated. For statistical evaluation, analysis of variance (ANOVA) was used with 5% error level. Results: There are differences in color stability of nano composite after soaked in black tea and green tea. The value of color differences after soaked in black tea is 2,669 and green tea is 3,062. Conclusion: The stability of nano particle composite color is better at soaking with black tea compared with immersion with green tea.

Comparison of brittleness and flowability between Cipetir Gutta-Percha and commercial Gutta-Percha Usri, Kosterman; Faza, Yanwar; Sanjaya, Arya; Viona, Nona; Djustiana, Nina; Karlina, Elin; Febrida, Renny; Cahyanto, Arief
Padjadjaran Journal of Dentistry Vol 34, No 1 (2022): March
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/pjd.vol34no1.38869

Introduction: Gutta-Percha (GP) is a standard endodontic filling material found in pure form in the Cipetir area, Indonesia. However, a study comparing physical properties (brittleness and flowability) between pure GP and commercially used GP has not been found. Therefore, this study aims to test the brittleness and flowability of Cipetir GP compared to commercial GP. Methods: This study was quasi-experimental. Forty samples were prepared for each material and test, according to ANSI/ADA specification-GP cones-no 78 in 2006. The first step began by making a sample of Cipetir GP using moulds from a cuvette, commercial GP (Inline #80), and gypsum stone. The second step was to test the brittleness (Crease Recovery Tester) and flowability (according to ADA No. 78 of 2000) of Cipetir GP and commercial GP. Results: The brittleness test of Cipetir GP showed unbroken samples, and the commercial GP showed four broken samples. The Fisher's Exact test showed a p-value of 0.087, which means there was no significant difference in brittleness between Cipetir GP and commercial GP. At the same time, the average value of flowability of Cipetir GP and commercial GP were 6.46 mm and 0.19 mm, respectively. The unpaired t-test showed a p-value<0.05, which means there was a significant difference in the flowability between Cipetir GP and commercial GP. Conclusions: There is a brittleness similarity between Cipetir GP and commercial GP, while the flowability value of Cipetir GP is higher than commercial GP. Those initial findings showed that the Cipetir GP might become an excellent candidate to be an alternative endodontic filling.

The comparison of color stability between thermoplastic nylon resin and heat-cured acrylic resin after tea-soaking using spectrophotometer Lestari, Lisa Putri; Usri, Kosterman; Febrida, Renny
Padjadjaran Journal of Dentistry Vol 21, No 3 (2009): November 2009
Publisher : Universitas Padjadjaran

Color stability is one of the denture base material requirement. Nowadays, nylon thermoplastic resin and heat-cured acrylic resin which is used as denture base materials can be changed in colour. One of a colour-changed factor is the tea drinking habit. The objective of this research was to compare the colour stability between nylon thermoplastic resin and heat-cured acrylic resin after soaked in tea. Materials used for the research were nylon thermoplastic resin from Valplast and heat-cured acrylic resin QC-20, with a sample size of 64x(10±0.03)x(2.5±0.03)mm. The sample would be assessed of colour stability after the denture base soaked in tea for 7 days. The colour measurement of each sample was done by spectrophotometer equipment (CIE lab system). Data gathered later on statistically processed with ANOVA testing. The result showed that the comparison ratio of colour stability between nylon thermoplastic resin and heat-cured acrylic resin after soaked in tea was 1.9886:1.1152. The conclusion was that colour stability in the nylon thermoplastic resin was lower than heat-cured acrylic resin after soaked in tea. This result was due to a polymer chain of nylon thermoplastic which was lower than heat-cured acrylic resin and its porosity which was higher, so tea easily soaked into the materials.

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