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Abstrak :
An experimental laboratory study has been conducted to investigate the effect of temporary zinc oxide eugenol cement on the transverse strength of self-cure acrylic resin. Two groups of resin plates 20x9x1 mm in dimensions were incorporated in the study. Each groups consisted of 31 specimens. On the first group was applied a 0.1 mm thickness of temporary zinc oxide eugenol cement on acrylic which is only partially polymerized. The time we establish here was 30 minutes, thus the zinc oxide eugenol cement was applied 30 minutes following the beginning of the mix. After being stored in a incubator with the temperature set at 37°C for 7 days in water, all the specimens were subjected to load by Shimadzu machine with cross head speed of 0.05 inch/min- Results were analyzed with T-test showing that the two groups differed significantly. It was observed that zinc oxide eugenol cement decreases the transverse strength of self-cure acrylic resin significantly By mathematical equation, 0-03 mm increase in thickness in the experimental group might produce the same strength as the control group.

Abstrak :
Penelitian ini bertujuan untuk mengetahui pengaruh lama perendaman denture adhesive cream terhadap kuat rekat resin akrilik polimerisasi panas. Krim pada plat akrilik direndam dalam akuades selama 15 detik, 30 detik, dan 60 detik, kemudian kuat rekat diukur dengan alat PASCO-Economy Force Sensor CI-6476. Uji analisis statistik menggunakan Anova one-way. Hasil penelitian menunjukkan Kuat rekat meningkat dengan p<0,05 pada perendaman selama 15 detik dan 30 detik, sedangkan kuat rekat menurun dengan p<0,05 pada perendaman selama 60 detik. Disimpulkan bahwa krim yang direndam dalam akuades lebih dari 30 detik tidak dapat meningkatkan kuat rekat resin akrilik polimerisasi panas.

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The purpose of this study was to investigate the influence of immersion time of denture adhesive cream in distilled water to the acrylic resin's adhesive strength. Cream on acrylic plate was immersed in distilled water for 15 seconds, 30 seconds, and 60 seconds. Adhesive strength was measured by PASCO-Economy Force Sensor CI-6476. Statistic analysis using one-way ANOVA showed that adhesive strength were significantly increased after immersion in 15 seconds and 30 seconds, and significantly decreased after immersion in 60 seconds. It was concluded that denture adhesive cream couldn't increase the acrylic resin's adhesive strength after immersed more than 30 seconds.

Abstrak :
Latar Belakang: Prevalensi denture stomatitis pada pengguna gigi tiruan dengan basis cukup tinggi. Tujuan: Mengamati pengaruh kekasaran bahan basis gigi tiruan terhadap jumlah koloni Streptococcus mutans. Metode: Kekasaran spesimen diukur menggunakan surface roughness tester. Spesimen dicelupkan ke dalam eppendorf tube modifikasi berisi Streptococcus mutans dengan durasi inkubasi 12 jam dan 24 jam. Data dianalisis dengan Korelasi Bivariat (Pearson). Hasil: Terdapat hubungan kuat positif antara pemolesan bahan basis gigi tiruan dengan jumlah koloni Streptococcus mutans. Kesimpulan: Penurunan nilai kekasaran permukaan setelah dilakukan pemolesan pada bahan basis gigi tiruan metal, resin akrilik, dan valplast, akan diikuti dengan penurunan jumlah koloni Streptococcus mutans. ...... Introduction: The prevalence of denture stomatitis is high in denture wearers. Objectives: The objective of this study is to observe the effect of surface roughness of denture base materials to the amount of Streptococcus mutans. Methods: Surface roughness was measured by using surface roughness tester. Specimens were dipped into the eppendorf tube containing Streptococcus mutans and incubated for 12 and 24 hours. Statistical analysis was conducted by Bivariate Correlation (Pearson). Results: There is a strong positive correlation between polishing denture base material with the amount of Streptococcus mutans. Conclusion: The decrease in the value of surface roughness after polishing the denture base metal, acrylic resin, and valplast is followed by the decrease in amount of Streptococcus mutans.

Abstrak :
[ABSTRAK
Penelitian ini bertujuan untuk membandingkan kuat rekat geser dan Adhesive Remnant Index (ARI) dua produk breket metal yang direkatkan dengan satu adesif. Dua puluh gigi premolar atas manusia ditanam pada silinder PVC dengan resin akrilik. Spesimen dibagi menjadi dua kelompok, kelompok A: breket metal 3B, Cina + Transbond XT; kelompok B: breket metal Protect, Cina + Transbond XT (3M, Unitek, Amerika). Dihasilkan rerata kuat rekat geser 6,09 dan 7,91 MPa pada kelompok A dan B (p<0,05) dan nilai ARI: 1 dan 2 pada kedua kelompok (p>0,05). Disimpulkan bahwa dua kelompok memiliki nilai kuat rekat geser yang berbeda bermakna dengan kegagalan ikatan bersifat kohesif ABSTRACT
The aims of this study were to compare in vitro shear bond strength (SBS) and Adhesive Remnant Index (ARI) of two metal bracket products bonded with an adhesive material. Twenty human upper first premolar embedded in acrylic resin. Specimens were divided into two groups, Group A: 3B, China metal bracket + Transbond XT; Group B: Protect, China metal bracket + Transbond XT (3M, Amerika). The mean SBS for Group A and B were 6,09 dan 7,91 MPa and ARI: 1 and 2 (p>0,05). It was concluded that the SBS of two groups was significantly different with cohesive bond failure.;The aims of this study were to compare in vitro shear bond strength (SBS) and Adhesive Remnant Index (ARI) of two metal bracket products bonded with an adhesive material. Twenty human upper first premolar embedded in acrylic resin. Specimens were divided into two groups, Group A: 3B, China metal bracket + Transbond XT; Group B: Protect, China metal bracket + Transbond XT (3M, Amerika). The mean SBS for Group A and B were 6,09 dan 7,91 MPa and ARI: 1 and 2 (p>0,05). It was concluded that the SBS of two groups was significantly different with cohesive bond failure., The aims of this study were to compare in vitro shear bond strength (SBS) and Adhesive Remnant Index (ARI) of two metal bracket products bonded with an adhesive material. Twenty human upper first premolar embedded in acrylic resin. Specimens were divided into two groups, Group A: 3B, China metal bracket + Transbond XT; Group B: Protect, China metal bracket + Transbond XT (3M, Amerika). The mean SBS for Group A and B were 6,09 dan 7,91 MPa and ARI: 1 and 2 (p>0,05). It was concluded that the SBS of two groups was significantly different with cohesive bond failure.]

Abstrak :
Latar belakang: Kehilangan gigi dapat menyebabkan terganggunya kemampuan mastikasi sehingga dapat mempengaruhi kesehatan umum dan kualitas hidup individu. Pemakaian gigi tiruan sebagian lepasan akrilik yang sesuai dengan klasifikasi kehilangan gigi dapat membantu mengembalikan fungsi gigi yang hilang, sehingga diharapkan mampu meningkatkan kemampuan mastikasi. Namun, tidak semua pengguna gigi tiruan memiliki kemampuan mastikasi yang lebih baik setelah menggunakan gigi tiruan. Tujuan: Menganalisis pengaruh pemakaian gigi tiruan sebagian lepasan akrilik berdasarkan klasifikasi Kennedy terhadap kemampuan mastikasi, menganalisis hubungan antar kelas pada klasifikasi Kennedy terhadap kemampuan mastikasi, menganalisis pengaruh faktor sosiodemografi usia,jenis kelamin, tingkat pendidikan terhadap kehilangan gigi dan kemampuan mastikasi. Metode: Penelitian ini dilakukan dengan desain cross sectional pada 30 pasien RSKGM Fakultas Kedokteran Gigi Universitas Indonesia berusia 20 tahun ke atas yang baru menggunakan gigi tiruan sebagian lepasan akrilik. Dilakukan pencatatan diri subjek serta wawancara pengisian kuesioner kemampuan mastikasi. Hasil penelitian: Pemakaian gigi tiruan sebagian lepasan akrilik pada kehilangan gigi berdasarkan klasifikasi Kennedy diketahui memiliki pengaruh p=0,00 terhadap kemampuan mastikasi. Gigi tiruan sebagian lepasan akrilik kelas 1 dan kelas 2 Kennedy, kelas 2 dan kelas 3 Kennedy, kelas 2 dan kelas 4 Kennedy memiliki pengaruh dengan kemampuan mastikasi. Tidak terdapat pengaruh antara faktor sosiodemografi usia,jenis kelamin, tingkat pendidikan, dan tingkat pendapatan terhadap kemampuan mastikasi. Kesimpulan: Terdapat pengaruh pemakaian gigi tiruan sebagian lepasan akrilik berdasarkan klasifikasi Kennedy terhadap kemampuan mastikasi. ...... Background: Tooth loss can cause disruption of masticatory ability and may affect patient's general health and quality of life. The use of acrylic removable partial denture based on the classification of tooth loss may restore the oral function, which is expected to increase patient's masticatory ability. However, not all denture wearers have better masticatory ability after using the removable partial denture. Objectives: To analyze the effect of removable partial denture wearing based on Kennedys classification towards masticatory ability, correlation between each class on Kennedy's classification towards masticatory ability, and the effect of sociodemographic factors age, gender, educational level toward tooth loss and masticatory ability. Methods: Cross Sectional Study was conducted on 30 patients of RSKGM Faculty of Dentistry University of Indonesia aged 20 years and over who just used removable partial denture. Subjects personal data were obtained, and interview for masticatory ability was conducted. Results: There was significant difference p 0,00 between removable partial denture wearing on tooth loss based on kennedys classification towards masticatory ability. Kennedy class 1 and 2, class 2 and 3, class 2 and class 4 removable partial denture have significant difference with masticatory ability. There was no significant difference between sociodemographic factors age, gender, educational level, income level toward tooth loss and masticatory ability. Conclusion: The use of removable partial denture based on Kennedys classification may increase patients masticatory ability.

Abstrak :
Polymerization of a self acrylic resin often done improperly. In daily practice, some put in room temperature water, some in warm water, but many of them left it in the open air. In the dental laboratory, a pressure cooker was used in order to get a better result. However, many clinicians did not like to use it due to the cost and inconveniency. In order to get an effective and less expansive equipment, a simple 'Mini Pressure Chamber-45' (Alat Tekan Mini-45) was developed. It wa made from a 4 inch PVC (about 10 cm in diameter). The mechanism of this equipment was to give a pressure to the resin during polymerization through a valve which was connected to the dental compressor. The pressure given was about 1 kg/cm2, and it was given in 5 minutes. The purpose of this study was to show the effectiveness of MPC-45 in reducing the porosity of the self cure acrylic resin in compare to the other kind of treatment. There were 5 groups of treatment and each group consisted of 30 specimen. In group 1, the samples were put in the open air during polymerization. In group 2, samples were dipped in the room temperature water, and in group 3 samples were dipperd in warm water (40.1°C). In group 4, samples were dipped in a pressure cooker for 10 minutes. In group 5, samples were dipped in MPC-45 under 1 kg/cm2 pressure for 5 minutes. The result showed that MPC-45 was the most effective method in reducing the porosity of the self-cure acrylic resin.

Abstrak :
Modelling wax is an auxiliary material in acrylic denture fabrication. This material should have standard quality. Many local and imported brand of modelling waxes are distributed in Yogyakarta. The aim of this study is to examine the quality of modelling waxes in Yogyakarta based on international standard. Seven brand of modelling waxes (Rusco tropical, Cavec Tropical, Ruby, SMIC, Anchor Brand Medium, Anchor Brand Hard, and Anchar Brand Medium) were examined by ISO 12163 (ANSI/ADA No. 24) specification. The spesification which were examined were general requirements (uniform shapes, free from foreign materials, smooth sheets, uniform texture, cohere if softened, and uniform dimension), special requirements (color, odor & flafour, softening, trimming, and flaming), and preparation for delivery requirements (packaging and marking). The modelling waxes were stated fulfil the requirements if all 5 samples of each brands were suitable with the specification. The results showed that one brand (Cavec Tropical) fulfilled general and special requirements, 1 brand (SMIC) only fulfilled general requirements, and 3 brands (Rusco Tropical, Ruby, and Anchor Brand Hard) only fulfilled general requirements. No brand fulfilled preparation for delivery requirements. The conclusion of this study was no brand of modelling waxes distributed in Yogyakarta fulfilled all requirements.