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"[Latar Belakang: Objektifitas rasio akar-mahkota gigi klinis dan konvergensi akar gigi. Tujuan: Menentukan rasio akar-mahkota gigi klinis dan tipe konvergensi akar gigi molar pertama yang menyebabkan trauma oklusi. Material dan Metode: Metode Lind (1972) dan metode baru untuk menentukan konvergensi akar gigi. Hasil: Rasio >1,51= baik; 1-≤1,50= cukup baik; 0,51-0,99= buruk; ≤0,50=sangat buruk. Ada hubungan antara gabungan rasio akar-mahkota gigi klinis dan konvergensi akar gigi dengan kegoyangan gigi (rs:0,302), lamina dura, (rs: 0,211), resesi gingiva bukal (rs: 0,245), kehilangan perlekatan (rs: 0,233). Kesimpulan: Ada hubungan antara rasio akar mahkota gigi yang tidak seimbang disertai konvergensi akar gigi dengan trauma oklusi. , Background: An objective assessment of clinical root-crown ratio and root convergence. Objective: To determine the clinical root-crown ratio and root convergence type of first molar which cause trauma from occlusion. Materials and Methods: Method of Lind (1972) and a new method to determine the root convergence. Results: The ratio >1.51=good; 1-≤1.50= pretty good; 0.51-0.99= poor; ≤ 0.50= very bad. There is a relationship between the combined of clinical root-crown ratio and root convergence with tooth mobility (rs: 0.302), lamina dura, (rs: 0.211), buccal gingival recession (rs: 0.245), loss of attachment (rs: 0.233). Conclusion: There is a relationship between the combine of clinical root-crown ratio and root convergence with trauma from occlusion. ]"

"Latar belakang: Maloklusi merupakan bentuk penyimpangan oklusi ideal dan menjadi masalah gigi dan mulut dengan prevalensi tertinggi ketiga di dunia. Berdasarkan data Riskesdas 2018, proporsi penduduk Indonesia yang melakukan perawatan ortodonti untuk mengatasi maloklusi masih sangat rendah yaitu hanya 0,3%. Rendahnya proporsi tersebut kemungkinan disebabkan berbagai faktor seperti pengetahuan, motivasi, dan hambatan. Tujuan: Mengetahui hubungan pengetahuan, motivasi, dan hambatan terhadap perawatan ortodonti pada mahasiswa Universitas Indonesia Metode: Studi analitik observasional potong lintang pada 318 mahasiswa Universitas Indonesia Angkatan 2017. Instrumen yang digunakan yaitu tiga buah kuesioner tentang pengetahuan, motivasi dan hambatan melalui adaptasi lintas budaya. Hasil: Lebih dari 50% responden memiliki pengetahuan, hambatan, dan kemampuan terhadap perawatan ortodonti dengan kategori sedang. Terdapat 36,2% responden yang memiliki motivasi terhadap perawatan ortodonti tinggi. Uji korelasi Spearman menunjukan terdapat hubungan yang bermakna (p≤0,05) antara pengetahuan dan motivasi terhadap perawatan ortodonti; antara pengetahuan dan hambatan terhadap perawatan ortodonti; serta antara motivasi dan hambatan terhadap perawatan ortodonti. Motivasi merupakan faktor yang memiliki nilai korelasi terbesar (r=0,798, p≤0,05)terhadap perawatan ortodonti. Kesimpulan: Mahasiswa Universitas Indonesia angkatan 2017 memiliki tingkat motivasi tinggi untuk melakukan perawatan ortodonti, tetapi memiliki tingkat pengetahuan, hambatan, dan kemampuan terhadap perawatan ortodonti sedang. Terdapat hubungan antara pengetahuan, motivasi, dan hambatan terhadap perawatan ortodonti. Motivasi memiliki nilai korelasi paling besar terhadap perawatan ortodonti.

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Background: Malocclusion is a deviation from ideal occlusion and becomes a dental and oral health problem globally with the third-highest prevalence. According to Riskesdas 2018, the proportion of the Indonesian population who had undergone orthodontic treatment to treat malocclusion is still very low, only 0,3%. The low proportion is probably due to various factors such as knowledge, motivation, and barriers. Objective: To assess the relationship between knowledge, motivation, and barriers to orthodontic treatment among University of Indonesia students. Methods: An analytical cross- sectional study was conducted among 318 University of Indonesia students class of 2017. The instrument used was three questionnaires about knowledge, motivation, and barriers through cross-cultural adaptation. Results: More than 50% of the respondents have a moderate level of knowledge, barriers, and orthodontic treatment ability. There are 36.2% of respondents who have high motivation towards orthodontic treatment. The Spearman correlation test shows a significant relationship (p≤0,05) between knowledge and motivation to orthodontic treatment; between knowledge and barriers to orthodontic treatment; and between motivation and barriers to orthodontic treatment. Motivation shows the highest correlation to orthodontic treatment (r=0,798, p≤0,05). Conclusion: University of Indonesia students class of 2017 have a high level of motivation to perform orthodontic treatment but have a moderate level of knowledge, barriers, and ability to orthodontic treatment. There is a relationship between knowledge, motivation, and barriers to orthodontic treatment. Motivation has the greatest correlation value to orthodontic treatment."

"Penelitian ini bertujuan untuk mengevaluasi pengaruh durasi penyinaran dengan LED terhadap kebocoran tepi mikro restorasi resin komposit bulk-fill. Tiga puluh gigi premolar dipreparasi pada permukaan oklusal dengan panjang 4 mm, lebar 3 mm, dan kedalaman 4 mm yang disesuaikan dengan anatomi masing-masing gigi. Spesimen dibagi menjadi tiga kelompok secara acak berdasarkan durasi penyinaran 10 detik, 20 detik, dan 30 detik. Pengukuran kebocoran tepi mikro dilakukan menggunakan metode penetrasi zat warna, larutan methylene blue 1. Data yang diperoleh dianalisis menggunakan uji statistik Kruskal-Wallis. Hasil analisis tidak menunjukan perbedaan bermakna p>0,05 pada semua kelompok. Durasi penyinaran tidak memberikan pengaruh yang signifikan terhadap kebocoran tepi mikro restorasi resin komposit bulk-fill.

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This aims to evaluate the influence of different exposure time on its microleakage. Cavity preparation was perfomed on the occlusal side of thirty human premolar teeth with 4 mm length, 3 mm width, and 4 mm depth. Specimen were randomly divide into three groups according to exposure times 10s, 20s, and 30s. The microleakage was measured using 1 methylene blue. Data were statistically analyzed by Kruskal Wallis. The result showed insignificant differences in all groups p 0,05. Exposure times was not significantly affected the microleakage of bulk fill composite resin restoration. "

"Latar Belakang: Mobilitas gigi atau kegoyangan gigi dapat disebabkan oleh kekuatan oklusal yang melebihi batas fisiologis periodonsium. Ketika gigi beroklusi akan menghasilkan kekuatan oklusal. Terdapat tiga tipe oklusi saat gerakan lateral mandibula, yaitu oklusi seimbang, group function, dan cuspid protected.Tujuan: Mengetahui hubungan antara oklusi seimbang, group function, dan cuspid protected dengan mobilitas gigi; dan mengetahui tipe oklusi yang banyak menyebabkan mobilitas gigi.Metode: Penelitian analitik observasional dengan rancangan cross-sectional. Subjek penelitian adalah mahasiswa program akademik FKG UI angkatan 2005-2008 yang berusia 17-23 tahun sebanyak 78 orang yang diambil secara purposive sampling. Analisis statistik secara univariat berupa distribusi masing-masing variabel, dan secara bivariat berupa uji Fisher.Hasil: Uji Fisher menunjukkan tidak terdapat hubungan antara oklusi seimbang, group function, dan cuspid protected dengan mobilitas gigi (p > 0,05). Statistik deskriptif belum dapat membuktikan tipe oklusi yang banyak menyebabkan mobilitas gigi.Kesimpulan: Tidak terdapat hubungan antara oklusi seimbang, group function, dan cuspid protected dengan mobilitas gigi pada mahasiswa program akademik Fakultas Kedokteran Gigi Universitas Indonesia Angkatan 2005-2008. Dan tidak dapat membuktikan bahwa oklusi seimbang banyak menyebabkan mobilitas gigi.

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Background: Tooth mobility or tooth looseness can result from occlusal forces which overload the limit of periodontal physiologic. When teeth occlude, it will result in occlusal forces. There are three types of occlusion during lateral movement of the mandible; balanced occlusion, group function, and cuspid protected.Objective: To identify the relationship between balanced occlusion, group function, and cuspid protected with the tooth mobility; and to identify the type of occlusion which is the most causing the tooth mobility.Method: This research is observational analysis using cross-sectional study. The subjects are 78 preclinical dental students from University of Indonesia Class 2005-2008, aged 17-23 years old which were taken by purposive sampling. Univariate statistical analysis is distribution of each variables, and bivariate statistical analysis is using Fisher test.Result: Fisher test showed that there was no relationship between balanced occlusion, group function, and cuspid protected with the tooth mobility (p > 0,05). Descriptive statistic was not able to prove the type of occlusion which is the most causing the tooth mobility.Conclusion: There was no relationship between balanced occlusion, group function, and cuspid protected with the tooth mobility on preclinical dental student from University of Indonesia Class 2005-2008. And, there is no evidence that balanced occlusion is the most causing the tooth mobility."