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All Journal Jurnal Teknosains Dental Journal (Majalah Kedokteran Gigi)
Dyah Anindya Widyasrini
Universitas Gadjah Mada
Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Dentistry Industrial & Manufacturing Engineering Mechanical Engineering

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DENTAL MATERIALS FOUNDATIONS AND APPLICATIONS Dyah Anindya Widyasrini
Jurnal Teknosains Vol 8, No 1 (2018): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.42375

Abstract

Rongga mulut merupakan lingkungan yang amat beragam kondisinya. Material yang akan digunakan dalam lingkungan tersebut harus mampu bertahan dalam segala kondisi. Dalam lingkungan rongga mulut hal-hal ini sangat biasa terjadi: perubahan temperatur yang drastis, tekanan mekanis yang besar, melekatnya komunitas mikroorganisme pada semua permukaan maupun adanya serangan bahan kimiawi dari makanan maupun cairan tubuh. Memahami dasardasar ilmu material merupakan kunci untuk dapat mengembangkan material yang cocok dengan lingkungan mulut serta relevan dengan kenyataan klinis yang dihadapi. Dengan mengerti dasar ilmu material diharapkan pembaca dapat memprediksi keberhasilan perawatan dengan material kedokteran gigi. Buku yang ditulis oleh John M. Powers dan John C. Wataha ini menjelaskan material dental dari hal yang paling dasar, yaitu atom penyusunnya, hingga aplikasinya dalam praktik klinis. Consice but precise, begitulah cara materi dalam buku ini disampaikan. Diulas dalam 15 bab plus 1 bab pendahuluan dengan alur yang runtut pada tiap bahasannya. Dimulai dari sifat-sifat material, kegunaan, manipulasi spesifik, serta aplikasi klinis dalam dunia kedokteran gigi, sehingga memudahkan pembaca dalam memahami dan membandingkan tiap material. Setiap akhir dari bab dalam buku ini juga dilengkapi dengan self-test questions, untuk mengukur seberapa dalam pemahaman pembaca terhadap materi yang telah disajikan. Tentunya berbagai material dan teknologi terbaru yang digunakan di kedokteran gigi juga tidak lupa diuraikan.
Pengaruh Desain Stent pada Jumlah Limfosit dan Trombosit Kelinci (Oryctolagus Cuniculus) Widowati Siswomihardjo; Dyah Anindya Widyasrini; Dinar Arifianto; Setyo Budhi; Nahar Taufiq
Jurnal Teknosains Vol 9, No 1 (2019): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.51526

Abstract

Percutaneous Coronary Intervention (PCI) is an effective treatment for coronary artery diseases. For the procedure, a stent is put in the coronary arteries. There are a variety of stent materials and designs available on the market. The development of stents continues with the goal to reduce the risk of failure. The design and the ability of the stent as a vascular scaffold are important factors for the success of the stent. The implantation of a stent as a foreign body can lead to inflammation. In general, the inflammation is characterized by an increased number of lymphocytes. Then, platelets play a role in coordinating the occurrence of inflammation and immune response. This study aims to determine the effect of stent design on the number of lymphocytes and platelets as a marker of inflammation. The study was conducted on ten rabbits divided into two treatment groups, namely KP1 (new design stent) and KP2 (commercial stent) by placing a stent on the iliac artery. One hour before stenting, 2 ml of blood was collected in all experimental animals. Then, 2 ml of blood was collected again on the 7th and 28th day after stenting.  Data was collected based on the number of lymphocytes and platelets from all experimental animals. Statistical analysis using two-way ANOVA shows no significant difference (p> 0.05) on the number of lymphocytes and platelets between the two groups with different stent designs. It can be concluded that the design of a stent does not show a tendency to cause inflammation.
Effects of alkalisation and volume fraction reinforcement of Bombyx mori silk fibre on the flexural strength of dental composite resins Dyah Anindya Widyasrini; Siti Sunarintyas
Dental Journal (Majalah Kedokteran Gigi) Vol. 53 No. 2 (2020): June 2020
Publisher : Faculty of Dental Medicine, Universitas Airlangga https://fkg.unair.ac.id/en

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/j.djmkg.v53.i2.p57-61

Abstract

Background: Composite resins are widely used in dentistry to restore dental caries. Recently, short fibre-reinforced composite (FRC) resins have been widely used for high-stress areas, especially in posterior teeth. Bombyx mori silk fibre is under research to reinforce dental composite resin as it has good mechanical properties. Purpose: This study aims to obtain the effects of alkalisation and silk fibre volume fraction on the flexural strength of FRC. Methods: Bombyx mori silk fibres were obtained from Perhutani, Pati, Indonesia. Samples were divided into two alkalisation groups (4% and 8%). Alkalisation of the silk fibres was conducted through the scouring process in NaOH, hydrolysis (30% H2SO4) and drying. Silk fibres were then reinforced in a resin matrix. The samples were subdivided based on the fibre volume fraction reinforcements, which were 0%, 5%, 10% and 15%. Each group of samples consisted of three specimens (n = 3). Flexural strength was measured using a universal testing machine. Data were analysed by two-way ANOVA (p < 0.05) and post-hoc least significant difference test (p < 0.05). Results: The results showed the flexural strength (MPa) means of the 4% alkalisation group were 169.31 ± 54.28 (0%), 76.08 ± 43.69 (5%), 107.86 ± 40.61 (10%) and 101.99 ± 10.61 (15%). The flexural strength (MPa) means of the 8% alkalisation group were 169.31 ± 54.28 (0%), 82.62 ± 22.41 (5%), 111.07 ± 32.89 (10%) and 153.23 ± 23.80 (15%). Statistical analysis by ANOVA indicated that the fibre volume fraction affected the flexural strength of composite resins. Conclusion: It can be concluded that the volume fraction of silk fibre increases the flexural strength of composite resins, although the strength is not as high as a composite resin without fibres. However, the alkalisation percentage did not affect the flexural strength of composite resins, and there was no interaction between alkalisation percentage and fibre volume fraction with the flexural strength of composite resins.
Co-Authors Dinar Arifianto Nahar Taufiq Setyo Budhi Siti Sunarintyas Widowati Siswomihardjo