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"Jus jeruk memiliki pH di bawah pH kritis email dan semakin mudah dikonsumsi dengan adanya bentuk kemasan. Tujuan: Mengetahui pengaruh lama perendaman dan jenis jus terhadap kekerasan email. Metode: 60 gigi premolar direndam di dalam jus jeruk segar dan kemasan (masing - masing n=30) selama 30 dan 60 menit. Hasil: Hasil analisis Repeated ANOVA, Friedman, Mann-Whitney dan Independent T-test, menunjukan terjadinya penurunan kekerasan email yang bermakna (p<0,05) di setiap waktu pengukuran, serta gigi yang direndam jus jeruk kemasan penurunan kekerasan emailnya lebih besar (p<0,05). Kesimpulan: Penurunan kekerasan email dipengaruhi pH dan kandungan asam sitrat jus jeruk serta lama perendaman.

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Orange juice has pH below enamel critical pH and is getting easier to be consumed since commercial one is provided.

Objective: to know effects of immersion time and juice types to enamel hardness.

Method: 60 premolars were immersed in fresh orange juice and commercial one (each n=30) for 30 and 60 minutes.

Result: Repeated ANOVA, Friedman, Mann-Whitney and Independent T-test results showed that enamel hardness decrease occured (p<0,05) in every measurement time and commercial juice immersion had significantly greater enamel hardness decrease (p<0,05).

Conclusion: enamel hardness decrease was affected by juice pH, juice citric acid concentration, and immersion time."

"Konsumsi jus jeruk terus meningkat dengan kehadiran jus jeruk dalam kemasan. Belum banyak penelitian yang dilakukan mengenai efek jus ini dibanding jus jeruk segar terhadap gigi. Tujuan: Mengetahui perbedaan penurunan pH plak setelah konsumsi jus jeruk kemasan dan jus jeruk segar. Metode: Subjek diberikan 3 perlakuan: mengonsumsi jus jeruk kemasan, jus jeruk segar, jus lemon segar. Nilai pH plak kemudian diukur setelah 1-30 menit. Hasil: Terdapat perbedaan bermakna penurunan nilai pH plak 1-10 menit setelah konsumsi jus jeruk kemasan, jus jeruk segar, jus lemon segar Kesimpulan: Penurunan pH plak setelah konsumsi jus jeruk kemasan lebih besar dibandingkan dengan jus jeruk segar.

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Orange juice consumption has been increased with the presence of commercially orange juice. There had been little study about the effect of this juice compared to fresh fruit juice on human teeth.

Objective: To know the difference of pH dental plaque reduction, after consumption of commercially orange juice and fresh orange juice.

Methods: Subjects were given three treatments: consuming commercially orange juice, fresh orange juice, and fresh lemon juice. pH dental plaque was measured after 1-30 minutes

Results: The difference of pH dental plaque reduction is statistically significant after 1-10 minutes consuming commercially orange juice, fresh orange juice, fresh lemon juice.

Conclusion: The reduction of pH dental plaque was greater after consumption of commercially orange juice than after fresh orange juice."

"Latar Belakang : E. faecalis merupakan bakteri yang mampu membentuk biofilm dan banyak ditemukan pada kasus kelainan periapeks. Tujuan : Mengetahui perbandingan daya antibakteri ekstrak kulit jeruk lemon (Citrus limon l.) dan klorheksidin 2% terhadap biofilm E. faecalis dari isolat klinis. Metode : Menilai kekeruhan larutan biofilm E. faecalis pasca pemaparan bahan uji, dengan ELISA reader. Hasil : Terdapat daya antibakteri ekstrak kulit jeruk lemon (Citrus limon l.) terhadap biofilm E. faecalis tetapi tidak terdapat perbedaan bermakna dengan klorheksidin 2% (p>0.05). Kesimpulan : Daya antibakteri ekstrak kulit jeruk lemon (Citrus limon l.) terhadap biofilm E. faecalis sebanding dengan klorheksidin 2%.

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ackground : E. faecalis has the ability to form biofilm and is often found in cases of periapical lesions. Aim: To compare the effectivity of lemon peel extract and 2% chlorhexidine against biofilm of E. faecalis. Method : Score the turbidity of E. faecalis biofilm after immersion in antibacterial agent, with ELISA reader. Result : Lemon peel extract has antibacterial effectivity against E. faecalis biofilm but has no significant difference compared to 2% chlorhexidine (p>0.05). Conclusion : Antibacterial effectivity of lemon peel extract against E. faecalis biofilm is equal to2% chlorhexidine. "

"Latar Belakang: Affected dentin merupakan lapisan yang ditinggalkan pada perawatan karies secara minimal invasif karena dapat diremineralisasi. Lapisan ini masih terdapat ikatan silang kolagen yang intak meskipun, mineral apatit telah hilang. Remineralisasi dentin diregulasi oleh protein non kolagen Dentin Matriks Protein 1 (DMP1). Remineralisasi yang dihasilkan berupa remineralisasi intrafibrilar dan ekstrafibrilar. Remineralisasi intrafibrilar meningkatkan sifat fisik dentin. Guided Tissue Remineralization (GTR) merupakan metode remineralisasi dentin secara intrafibrilar dan ekstrafibrilar menggunakan material analog protein non kolagen. Material ini memiliki fungsi menyerupai DMP1. Salah satu material analog protein non kolagen adalah Carboxymethyl Chitosan/ Amorphous Calcium Phosphate (CMC/ACP). Tujuan:  Mengevaluasi remineralisasi dentin pada permukaan demineralized dentin setelah aplikasi material analog protein non kolagen CMC/ACP. Metode: Dua kelompok dilakukan demineralisasi buatan, salah satunya diaplikasikan material CMC/ACP sedangkan, kelompok lainnya tidak diaplikasikan CMC/ACP. Evaluasi remineralisasi dengan SEM dan EDX. Hasil: Terlihat remineralisasi pada permukaan demineralized dentin dan peningkatan kadar kalsium dan fosfat setelah aplikasi CMC/ACP pada hari ke-7. Perbandingan rerata dua kelompok tidak menunjukkan perbedaan bermakna. Kesimpulan: CMC/ACP memiliki potensi untuk meremineralisasi demineralized dentin.

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Background: Affected dentin is a layer has been left during non invasive caries treatment as it can be remineralized. Collagen crosslinking remains intact in this layer, however the apatite minerals have been lost. Dentin remineralization is regulated by a non collagenous protein, Dentin Matrix Protein 1 (DMP1) and resulting intra- and extrafibrillar remineralization. Intrafibrillar remineralization improves physical properties of dentin. Guided Tissue Remineralization (GTR) is a method of collagen dentin remineralization using non collagen protein analog, resulting in intra- and extrafibrillar remineralization.  This material has similar function with DMP1. Carboxymethyl Chitosan/ Amorphous Calcium Phosphate (CMC/ACP) is one of non collagen protein analog.Aim: To evaluate demineralized dentin remineralization after application non collagen protein analog CMC/ACP. Method: Two groups performed artificial demineralization, one of which applied CMC / ACP material whereas, the other group was not applied CMC / ACP. Remineralization was evalutated using SEM and EDX. Result: After 7 days CMC/ACP application, remineralization was observed on the surface of demineralized dentin, which showed a white irregularities surrounding the dentin tubuli. In addition, increasing calcium and phosphate level has been showed experimentally although, the comparison of both group is insignificant. Conclusion: CMC/ACP has a potential for demineralized dentin remineralization."