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All Journal Journal of Dentistry Indonesia The Indonesian Journal of Dental Research MKGK (Majalah Kedokteran Gigi Klinik) (Clinical Dental Journal) UGM Majalah Kedokteran Gigi Indonesia ODONTO Dental Journal Dental Journal (Majalah Kedokteran Gigi) Jurnal Kedokteran Gigi Universitas Padjadjaran Padjadjaran Journal of Dentistry Journal of Dentomaxillofacial Science Journal of Indonesian Dental Association E-Prodenta Journal of Dentistry Odonto dental journal
Diatri Nari Ratih
Departemen Ilmu Konservasi Gigi, Fakultas Kedokteran Gigi, Universitas Gadjah Mada, Yogyakarta, Indonesia
Biochemistry, Genetics & Molecular Biology Dentistry Health Professions Immunology & microbiology Medicine & Pharmacology Public Health

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Restorasi Mahkota Jaket Porselin Fusi Metal dengan Inti-Pasak Tuang Logam pada Kasus Fraktur Mahkota-Akar Pulpa Terbuka Elisabeth Dina Herlina Ns; Diatri Nari Ratih
Majalah Kedokteran Gigi Indonesia Vol 18, No 1 (2011): August
Publisher : Faculty of Dentistry, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4918.944 KB) | DOI: 10.22146/majkedgiind.16479

Abstract

Latar belakang. Trauma yang mengakibatkan fraktur mahkota-akar dengan terbukanya pulpa masih dapat direstorasi, untuk menghindari pencabutan gigi. Pilihan perawatan tergantung pada hubungan fragmen fraktur yang tertinggal pada soket dengan crest alveolar, keterlibatan pulpa, tahap erupsi gigi dan pembentukan apeks serta kebutuhan estetik pasien. Tujuan. Tujuan dari laporan kasus ini adalah untuk menunjukkan bahwa gigi yang mengalami fraktur mahkota-akar dengan terbukanya pulpa dapat dipertahankan dengan perawatan endo-restorasi menggunakan mahkota jaket porselin fusi metal (PFM) dengan retensi inti-pasak tuang logam. Kasus. Pasien wan ita berusia 22 tahun mengalami fraktur mahkota-akar dengan pulpa tertJuka pada gigi 12 karena terjatuh dari motor. Kasus ini dirawat dengan melakukan pulpektomi, gingivektomi pad a bagian palatal serta restorasi mahkota jaket PFM dengan retensi inti-pasak tuang logam. Kesimpulan. Trauma pada gigi yang menyebabkan fraktur mahkota-akar dengan terbukanya pulpa dapat dirawat dengan restorasi mahkota jaket PFM disertai retensi inti-pasak tuang logam, setelah sebelumnya dilakukan pulpektomi, sehingga gigi sberfungsi kembali secara optimal.
Kekerasan mikro resin komposit packable dan bulkfill dengan kedalaman kavitas berbeda Diatri Nari Ratih; Andina Novitasari
Majalah Kedokteran Gigi Indonesia Vol 3, No 2 (2017): August
Publisher : Faculty of Dentistry, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (296.768 KB) | DOI: 10.22146/majkedgiind.22798

Abstract

Microhardness of packable and bulkfill composite resin with different cavity depths. Bulkfill composite resin restorations are increasingly popular because the material can be irradiated with a thickness reaching 4 mm, making it easier to apply. The objective of this study was to determine the differences in the microhardness between packable and bulkfill composite resin restorations with a cavity depth of 2 mm and 4 mm. This study was done using 32 Teon molds (5 mm diameter), and grouped randomly into 4 groups in which each consisted of 8 samples. Group 1A, packable composite resin was applied to the mold with a cavity depth of 2 mm. Group 1B, bulkfill composite resin was applied to the mold with a cavity depth of 2 mm. Group 2A, packable composite resin was applied with a depth of 4 mm. Group 2B, bulkfill composite resin was applied with a depth of 4 mm. Each sample was immersed in articial saliva with a pH of 6.8 and stored in an incubator at a temperature of 37°C for 24 hours. The hardness of each sample was tested using Vickers indenter microhardness tester. The data obtained were then analyzed by using two-way ANOVA, followed by Tukey’s test. The results showed that bulkfill composite resin with a cavity depth of 2 mm has the highest average of microhardness (31.09 ± 2.02 VHN), followed by packable composite resin with a depth of 2 mm (17.52 ± 1.25 VHN), bulkfill with a depth of 4 mm (11.97 ± 1.23 VHN) and packable with a depth of 4 mm (3.18 ± 0.85 VHN). The two-way ANOVA analysis showed that there are significant differences between the types of composite resin and cavity depths (p < 0.05), and there is interaction between the types of composite resin and cavity depth (p<0.05). In conclusion, the microhardness of packable composite resin is lower than that of bulkfill at a cavity depth of 2 and 4 mm. ABSTRAKRestorasi resin komposit dengan bulkfill semakin populer karena material tersebut dapat disinar dengan ketebalan sampai 4 mm, sehingga mudah diaplikasikan. Tujuan dari penelitian ini adalah untuk mengetahui perbedaan kekerasan mikro restorasi resin komposit packable dan bulkfill dengan kedalaman kavitas 2 mm dan 4 mm. Penelitian ini dilakukan dengan menggunakan 32 cetakan Teflon (diameter 5 mm), dan dikelompokkan secara random menjadi 4 kelompok yang masing-masing terdiri dari 8 sampel. Kelompok 1A, cetakan diaplikasikan resin komposit packable dengan kedalaman kavitas 2 mm. Kelompok 1B, diaplikasikan komposit bulkfill dengan kedalam 2 mm. Kelompok 2A, diaplikasikan komposit packable dengan kedalaman 4 mm. Kelompok 2B, diaplikasikan komposit bulkfill dengan kedalaman 4 mm. Setiap sampel direndam dalam saliva buatan dengan pH 6,8 dan disimpan dalam inkubator dengan suhu 37 °C selama 24 jam. Setiap sampel diuji kekerasannya menggunakan Vickers indenter microhardness tester. Data yang diperoleh dianalisis dengan ANOVA dua jalur, dilanjutkan uji Tukey’s. Hasil penelitian menunjukkan resin komposit bulkfill dengan kedalaman kavitas 2 mm memiliki rerata kekerasan mikro tertinggi (31,09 ± 2,02 VHN), diikuti oleh resin komposit packable dengan kedalaman 2 mm (17,52 ± 1,25 VHN), bulkfill dengan kedalaman 4 mm (11,97 ± 1,23 VHN) dan packable dengan kedalaman 4 mm (3,18 ± 0,85 VHN). Analisis ANOVA dua jalur menunjukkan bahwa terdapat perbedaan yang signifikan antara jenis resin komposit dan antara kedalaman kavitas (p < 0,05), serta terdapat interaksi antara jenis resin komposit dan kedalaman kavitas (p < 0,05). Kesimpulannya, kekerasan mikro resin komposit packable lebih rendah dibandingkan bulkfill baik pada kedalaman kavitas 2 dan 4 mm.
Apical sealing ability of chitosan nanoparticles in epoxy-resin-based endodontic sealer Raras Ajeng Enggardipta; Raphael Tri Endra Untara; Pribadi Santosa; Aqilla Tiara Kartikaningtyas; Andina Widyastuti; Diatri Nari Ratih
Majalah Kedokteran Gigi Indonesia Vol 5, No 2 (2019): August
Publisher : Faculty of Dentistry, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/majkedgiind.40995

Abstract

A good sealing ability of apical part of root canal system is needed to prevent microleakage thus resulting long-lasting successful treatment. Chitosan nanoparticles as nanofillers could be added to epoxy resin sealer to increase adaptation to dentinal wall. The purpose of this study was to evaluate the apical sealing ability of chitosan nanoparticles addition to epoxy-resin-based sealer. Thirty mandibular premolars were used in this study. The root canals were prepared using rotary files up to #30/0.09. The canal was irrigated with 2.5% NaOCl and 17% EDTA, then was rinsed with sterile water. All teeth were randomly divided into 3 groups (n=10). Group I was obturated with gutta-percha, Group II was obturated with gutta-percha and epoxy resin sealer, group III was obturated with gutta-percha and epoxy resin sealer that was added with chitosan nanoparticles. All specimens were stored in an incubator for 7 days at 37 °C. After that, specimens were tested with centrifuging dye penetration method with methylene blue 2% solution. The specimens were longitudinally sectioned, observed under stereomicroscope (8x magnification) and measured in millimeters (mm). The data were analyzed using one-way Anova. The results of one-way Anova showed that dye penetration in apical part of the root canal in all groups was statistically significant difference. The addition of chitosan nanoparticles to epoxy resin sealer increases the apical sealing ability of root canal obturation material.
Effect of casein phosphopeptide-amorphous calcium phosphate on the flexural strength of enamel-dentin complex following extracoronal bleaching Diatri Nari Ratih; Hendargo Agung Pribadi
Dental Journal (Majalah Kedokteran Gigi) Vol. 48 No. 1 (2015): March 2015
Publisher : Faculty of Dental Medicine, Universitas Airlangga https://fkg.unair.ac.id/en

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (435.541 KB) | DOI: 10.20473/j.djmkg.v48.i1.p7-11

Abstract

Background: Bleaching can affect the mechanical properties of enamel-dentin complex, such as flexural strength. Casein phosphopeptide-amorphus calcium phosphate (CPP-ACP) is often used following bleaching treatment to reduce hypersensitivity and to increase demineralization of tooth. Purpose: The purpose of the study was to investigate the effect of CPP-ACP on the flexural strength of enamel-dentin complex following extracoronal bleaching. Methods: Forty-eight enamel-dentin plates (size 8 x 2 x 3 mm) were randomly assigned into 6 groups, each consisted of 8 samples. Group 1, no bleaching and immersed in artificial saliva. Group 2, no bleaching, CPP-ACP application only. Group 3, bleaching using 15% carbamide peroxide. Group 4, similar to group 3, except application of CPP-ACP for the times between bleaching. Group 5, bleaching with 40% hydrogen peroxide. Group 6, similar to group 5, except application of CPP-ACP for the times between bleaching. Flexural strength of each enamel-dentin plate was tested by threepoint bending test using universal testing machine. Results: The results showed that 15% carbamide peroxide and 40% hydrogen peroxide significantly reduced flexural strength of enamel-dentin (216.25±26.44 MPa and 206.67±32.07 MPa respectively). Conversely, application of CPP-ACP following both bleachings increased flexural strength (266.75± 28.27MPa and 254.58±36.59 MPa respectively). A two-way Anova revealed that extracoronal bleaching agents significantly reduced flexural strength (p<0.05). Conclusion: Extracoronal bleaching agents reduce flexural strength, whereas application of CPP-ACP following bleaching either with 15% carbamide peroxide or 40% hydrogen peroxide can increase the flexural strength of enamel-dentin complex.
Penatalaksanaan non-bedah kasus previously initiated therapy gigi molar pertama maksila dengan lesi periapikal dan konfigurasi dua saluran akar mesiobukal Non-surgical management of previously initiated therapy of the maxillary first molar with periapical lesions and two mesiobuccal canals configuration Diatri Nariratih; Hendra Dian Adhita Dharsono
Jurnal Kedokteran Gigi Universitas Padjadjaran Vol 33, No 3 (2021): Desember 2021
Publisher : Fakultas Kedokteran Gigi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jkg.v33i3.29525

Abstract

ABSTRAKPendahuluan: Penatalaksanaan kasus penyakit pulpa yang disertai dengan lesi periapikal dapat dilakukan dengan perawatan saluran akar tanpa intervensi bedah. Preparasi biomekanis pada perawatan endodontik non-bedah dapat mengeliminasi bakteri dari saluran akar dan mencegah terjadinya infeksi berulang setelah dilakukannya obturasi. Kompleksitas anatomi menyebabkan keterbatasan preparasi biomekanis saluran akar, sehingga perawatan dapat mengalami kegagalan. Variasi anatomi saluran akar pada gigi molar pertama rahang atas umumnya terdapat pada bagian palatal akar mesiobukal yang disebut sebagai saluran akar mesiobukal kedua dengan insidensi 94%. Saluran akar mesiobukal kedua berukuran lebih sempit dan dangkal dibandingkan saluran akar mesiobukal pertama, sehingga dibutuhkan beberapa metode untuk menentukan lokasi orifis tersebut. Tujuan laporan kasus ini adalah membahas mengenai penatalaksanaan non-bedah gigi pasca perawatan endodontik parsial yang disertai dengan lesi periapikal. Laporan kasus: Pasien perempuan berusia 28 tahun datang dengan keluhan gigi belakang kiri atas sakit berdenyut sejak 1 bulan, gigi tersebut pernah dirawat saluran akarnya beberapa tahun sebelumnya. Pemeriksaan klinis menunjukkan terdapat tambalan permanen pada gigi 26. Pemeriksaan radiografis menunjukkan adanya gambaran radiopak pada email mesio-oklusal hingga mencapai dasar kamar pulpa, pelebaran ligamen periodontal, terputusnya lamina dura, serta lesi periapikal pada akar mesial dan palatal. Preparasi akses dilakukan pada gigi 26, dilanjutkan dengan penentuan lokasi orifis mesiobukal kedua. Empat saluran akar dipreparasi menggunakan instrumen rotary nickel titanium dengan teknik crown down dan dilakukan obturasi teknik kondensasi lateral. Restorasi definitif berupa mahkota penuh porselen. Simpulan: Lesi periapikal sembuh setelah dilakukan preparasi pada saluran akar mesiobukal kedua sehingga pengetahuan mengenai anatomi dan variasi internal saluran akar gigi sangat penting dalam keberhasilan perawatan endodontik non-bedah.Kata kunci: Perawatan endodontik non-bedah; previously initiated therapy; lesi periapical; mesiobukal kedua  ABSTRACTIntroduction: The management of pulp disease cases accompanied by periapical lesions can be done by root canal treatment without surgical intervention. Biomechanical preparations for non-surgical endodontic treatment can eliminate bacteria from the root canal and prevent re-infection after obturation. However, the complexity of the anatomy limits the biomechanical preparation of the root canal so that treatment can fail. Anatomical variations of the root canal in the maxillary first molars are generally found in the palatal part of the mesiobuccal root, which is the second mesiobuccal root canal with an incidence of 94%. The second mesiobuccal root canal is narrower and shallower than the first mesiobuccal root canal, so several methods are needed to determine the location of the orifice. The purpose of this case report was to discuss the non-surgical management of teeth after partial endodontic treatment accompanied by periapical lesions. Case report: A 28-year-old female patient complained of throbbing pain in the left upper back tooth for one month. The tooth had had its root canal treated several years before. Clinical examination revealed permanent fillings on tooth 26. Radiographic examination showed the radiopaque appearance of mesio-occlusal enamel to the floor of the pulp chamber, widening of the periodontal ligament, rupture of the lamina dura, and periapical lesions of the mesial and palatal roots. Access preparation was performed on tooth 26, followed by the determination of the location of the second mesiobuccal orifice. Four root canals were prepared using a rotary nickel titanium instrument with a crown down technique and obturation with lateral condensation technique. The definitive restoration is a full porcelain crown. Conclusions: Periapical lesions healed after preparation of the second mesiobuccal root canal. This result proves that knowledge of the anatomy and internal variations of the root canal is fundamental in the success of non-surgical endodontic treatment.Keywords: Non-surgical endodontic treatment; previously initiated therapy; periapical lesions; second mesiobuccal canal
Prevalence and characteristics of aggressive periodontitis Diatri Nariratih; Janti Rusjanti; Agus Susanto
Padjadjaran Journal of Dentistry Vol 23, No 2 (2011): July 2011
Publisher : Faculty of Dentistry Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (295.048 KB) | DOI: 10.24198/pjd.vol23no2.14020

Abstract

Aggressive Periodontitis is one of periodontal disease that generally affects individuals less than 30 years old, with a rapid attachment loss and alveolar bone destruction. Special features of the disease are affected incisors and first molars with symmetrical bilateral destruction. The purpose of this study was to determine the prevalence and characteristics of Aggressive Periodontitis at Student Clinics, Faculty of Dentistry Padjadjaran University on May to July 2010. Based on accidentally sampling, 415 new patients at Dental and Oral Hospital, Faculty of Dentistry Padjadjaran University and Dental and Oral Polyclinic at RSUP dr. Hasan Sadikin Bandung participated in this study. Each subject filled out the questionnaire and did a clinical examination. Patients with attachment loss ≥ 4 mm were referred for radiographic and microbiologic examination to support the diagnosis. The results showed that there were 13 patients who have the diagnostic criteria of Aggressive Periodontitis. Nine patients were diagnosed as Localized Aggressive Periodontitis, and 4 patients as Generalized Aggressive Periodontitis. It is concluded that the prevalence of Aggressive Periodontitis was 3.13%, and indicated low prevalence. Characteristics of Localized Aggressive Periodontitis patients were female in 20-29 age range, whereas characteristics of Generalized Aggressive Periodontitis patients were male in 30-39 age range.
PENGARUH PENUND AAN TAHAP PENUMPATAN DENGAN RESIN KOMPOSIT PADA TEKNIK SANDWICH TERHADAP KEKUATAN TARIK PELEKATAN SEMEN IONOMER KACA DAN RESIN KOMPOSIT Yulita Kristanti; Diatri Nari Ratih
Journal of Dentomaxillofacial Science Vol. 1 No. 1 (2002): Formerly Jurnal Dentofasial ISSN 1412-8926
Publisher : DiscoverSys Inc.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15562/jdmfs.v1i1.129

Abstract

Sandwich technique, a combination filling technique using composite resin filling material and glass ionomer cement has been widely used. In fact, such a combination filling technique need  ffcf i longer time compare to filling without combination. This research was done in order to know the influence of delayed fill ; ing in sandwich technique using composite resin related to the tensile strength between glass ionomer cement and composite resin.The materials studied consist of 16 samples, that were divided into 4 groups. The first one was used as the control groupt without delaying), while group II-IVwas used as the treating groups. Each group consist of 4 samples. The difference treatment between group II-IVwas the soaking time in the artificial saliva. Group II was soaked into artificial saliva (pH5)for 1 day, group , HI for 7 days, and group IVfor 14 days. The result of this research shows that the diference among the groups involved were very significant, except between group I and group II.The longer the sample was soaked into the artificial saliva, the tensile strength tends to decrease.
Functional Crown Lengthening: Biological Width Correction Regia Aristiyanto; Diatri Nari Ratih
Journal of Indonesian Dental Association Vol 3 No 1 (2020): April
Publisher : Indonesian Dental Association

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (782.614 KB) | DOI: 10.32793/jida.v3i1.427

Abstract

Introduction: Functional crown lengthening is one of the most common surgical procedures that facilitating restorative treatment. It was done on teeth with inadequate clinical crowns in the presence of deep and subgingival pathologies. Inadequate clinical crowns defined as tooth with less than 2 mm cervico-incisal of sound. Case Report: The 32 years old female patient complained on broken restoration on upper left anterior tooth since one week ago. He also complained about upper right anterior tooth that turned brown. The tooth had received root canal treatment with direct composite restoration since 3 years ago, but the restoration on tooth 11 and 21 was broken. The remaining crown on tooth 11 and 21 was less than 2 mm. The periapical radiograph examination showed tooth 11 and 21 was non-hermetic obturation. Functional crown lengthening and root canal treatment was performed on teeth 11 and 21, with porcelain crown restoration and fiber post. Conclusion: Functional crown lengthening result affects the quality of post retreatment restoration. The success of functional crown lengthening is marked by no recurrent gingival hyperplasia after functional crown lengthening.
Effect of two different materials in sealing vertical root fractures of intentional replantation on epithelial thickness of periradicular tissue Raphael Tri Endra Untara; Widjijono Widjijono; Widya Asmara; Diatri Nari Ratih
Majalah Kedokteran Gigi Indonesia Vol 7, No 2 (2021): August
Publisher : Faculty of Dentistry, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/majkedgiind.66092

Abstract

Vertical root fractures of intentional replantation need a material capable of binding the fragments of the fracture line tightly and encouraging the regeneration of periradicular tissue. One of the indicators that regeneration of periradicular tissue takes place is epithelial thickness. This study aimed to investigate the effect of mineral trioxide aggregate (MTA) and self-adhesive resin cement as the adhesive materials in sealing vertical root fractures of intentional replantation on the epithelial thickness of periradicular tissue. This study used 27 male New Zealand rabbits with the age range of 8-12 weeks. The mandibular incisor was extracted, and the tooth was cut from the cervical border to the 2/3 apical third. The samples were assigned randomly into three groups of 9 each, namely Group 1 with no application of any material in the fracture line (control group), Group 2 with MTA, and Group 3 with self-adhesive resin cement. All the teeth in all the groups were then inserted back into the socket. Each group was further divided into three subgroups based on the observation time, namely days 7, 14, and 21. Histological observations of the epithelial thickness were carried out under the light microscope (400x magnification). Data were analyzed using a two-way ANOVA and LSD post hoc test with a confidence level of 95%. The two-way ANOVA analysis showed that the materials used for sealing the fracture lines had a significant effect on the epithelial thickness (p<0.05), while the observation time did not affect the epithelial thickness (p>0.05). No interaction occurred between the material used and observation times (p>0.05). It can be concluded that MTA generated a greater epithelial thickness of periradicular tissue compared than self-adhesive resin cement in sealing vertical root fractures of intentional replantation.
The effect of sisal (Agave Sisalana) nanofiber in epoxy resin sealer on root canal obturation’s push-out bond strength Astriani Amanda; Diatri Nari Ratih; Ema Mulyawati
Majalah Kedokteran Gigi Indonesia Vol 7, No 3 (2021): December
Publisher : Faculty of Dentistry, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/majkedgiind.62691

Abstract

Sisal nanofiber can be used as an additional filler to increase the adhesion strength of the resin epoxy sealer. The aim of this study was to observe the effect of sisal nanofiber addition to epoxy resin sealer on push-out bond strength of root canal obturation material against the root canals. Twenty-five mandibular premolars (n= 25) were prepared until file F3 and obturated using 0%, 0.25%, 0.5%, 0.75%, and 1% sisal nanofiber sealer. After the specimens were stored at incubator, they were horizontally sectioned at apical third. Root sections were tested with push-out technique, and observed under a stereo microscope to determine the failure type. Data were analyzed with one-way ANOVA and LSD pos hoc at 95% confidence level (α=0.05). A one-way ANOVA test revealed that the addition of sisal nanofiber in epoxy resin sealer had a significant effect on the push out bond strength of the obturation material against the root canals. The failure type was observed predominantly in the cohesive type and the lowest in the adhesive type. The addition of sisal nanofiber to the epoxy resin sealer could increase the push-out bond strength of the obturation material against the root canals. Epoxy resin sealers with the addition of sisal nanofiber at a concentration group of 0.75% resulted in the highest push-out strength of root canal obturation materials followed by 0.5% concentration group.
Co-Authors Abiddinda Adyaputra Indrapradana Agus Susanto Agustin, Yuniari Andina Novitasari Andina Widyastuti Andina Widyastuti Andreas Edwin Aqilla Tiara Kartikaningtyas Arifati, Azizah Asri Riany Putri Astriani Amanda Azizah Arifati Dyah Tri Kusumawati Elisabeth Dina Herlina Ns Ema Mulyawati Ema Mulyawati, Ema Enggardipta, Raras Ajeng Fajrianti, Henytaria Hendargo Agung Pribadi Hendra Dian Adhita Dharsono Indrapradana, Adyaputra Janti Rusjanti Janti Rusjanti, Janti Lika Yodasari Maranantan, Helga Anindyastika Margareta Rinastiti Novaria, Novaria Pribadi Santosa Raphael Tri Endra Untara Regia Aristiyanto Sylvia Widhihapsari Tri Endra Untara Viera Seantiga W. Widjijono Wandita Swasti Agustin Widya Asmara Wignyo Hadriyanto Wiwik Handayani Yogi Premadhika Yulita Kristanti Yuniari Agustin