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"ABSTRAKPendahuluan: Pada penelitian yang telah dilakukan sebelumnya, zoledronate bisphosphonate dalam bentuk gel emulsi telah terbukti meningkatkan jumlah apoptosis sel osteoklas. Aplikasi topikal dalam bentuk gel telah banyak digunakan pada rongga mulut. Tujuan dari penelitian ini adalah untuk mengetahui stabilitas fisik gel zoledronate bisphosphonate sebagai salah satu syarat dalam pengembangan produk baru.Metode: Formulasi gel zoledronate dibuat dari carboxylmethylcellulose (CMC), gliserin, dan sodium benzoat dengan dosis 40 μg zoledronate dalam setiap 25 mg gel. Gel disimpan pada suhu 25°C dan 40°C selama 28 hari dan dievaluasi viskositas, pH, daya sebar, daya lekat, dan kadar obat pada awal, hari ke-7, hari ke-14, dan hari ke-28.Hasil: Pada penyimpanan suhu 25°C, uji repeated measure ANOVA menunjukkan tidak terdapat perbedaan bermakna secara statistik pada parameter viskositas, daya sebar, dan daya lekat antar waktu penyimpanan (p>0,05). Pada parameter kadar obat dan pH, terdapat perbedaan yang bermakna secara statistik (p<0,05) namun secara kuantatif masih dalam batas normal. Sementara pada hari ke-28 penyimpanan suhu 40°C, gel mengeras sehingga pengujian hanya dilakukan pada hari ke-7 dan ke-14. Terdapat perbedaan yang bermakna secara statistik pada semua parameter uji stabilitas (p<0,05) antar waktu pengamatan pada suhu 40°C. Hasil uji t-test independent menunjukkan tidak terdapat perbedaan bermakna secara statistik pada semua parameter (p>0,05) antar suhu penyimpanan pada hari ke-7 dan ke-14.Kesimpulan: Nilai viskositas, daya sebar, daya lekat, kadar obat, dan pH gel zoledronate stabil selama 28 hari pada suhu penyimpanan 25°C. Pada suhu 40°C setelah hari ke-14, gel zoledronate menjadi tidak stabil karena konsistensi gel mengeras pada hari ke-28.

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ABSTRACT

Introduction: In the previous study, topical application of zoledronate bisphosphonate in gel emulsion has been proven to increase the number of osteoclasts apoptosis. In the oral cavity, topical application is commonly used in gel form; therefore, this study was conducted to evaluate the physical stability of zoledronate bisphosphonate in gel form as one of the prerequisites in developing a new drug product.

Methods: The gel formulation was prepared using carboxylmethylcellulose (CMC), glycerine, and sodium benzoate in a dosage form of 40 μg zoledronate in every 25 mg gel. The gels were stored at 25°C and 40°C for 28 days and evaluated for viscosity, pH value, spreadability, adhesive strength, and drug content on the 1st day, 7th day, 14th day, and 28th day.

Results: At the 25°C of storage, repeated measure ANOVA test shows no statistically significant changes in viscosity, spreadability, and adhesive strength between the 7th, 14th, and 28th day (p>0,05). The changes in drug content and pH value were statistically significant (p<0,05) but quantitatively still in the normal range. Meanwhile, on the 28th day at the 40°C of storage, the gel hardened; therefore, the stability test could only be performed on the 7th and 14th day. There were statistically significant changes in all parameters (p<0,05) between the 7th, 14th, and 28th day at 40°C. The t-test independent shows no statistically significant changes in all parameters (p>0,05) between the 25°C and 40°C of storage on the 7th and 14th day.

Conclusion: The zoledronate bisphosphonate gel was stable in viscosity, spreadability, adhesive strength, drug content, and pH value at 25°C for 28 days. At 40°C of storage, zoledronate gel was unstable after 14 days because the consistency of the gel hardened on the 28th day."

"Application of mechanical force on abnormally positioned tooth, cause changes in tooth location and transmitted to the bone ia the periodontal ligament (PDL) produce orthodontic tooth movement. This force application is further way that remodeling in the area occurs. In order to develop biological strategies for enhancing this movement of teeth in bone, the underlying mechanisms of bone resorption and apposition should be understood in detail. Analysis of gingival crevicular fluid (GCF) may be a good means of examining the on going molecular and cellular process associated with gingival and bone turnover during orthodontic tooth movement. If it could be possible to biologically monitor and predict the outcome of orthodontic force, then the appliance management could be based on dividual tissue responseand the effectiveness of the treatment could be improved and understanding their biology is critical to finding ways to modifybone biology to move teeth faster. The present article reviewed ashort introduction to some mayors advanced mechanical force inmolecular and cellular biology during orthodontic tooth movement."

"Efek pergerakan gigi pada perawatan ortodonti pada aktivitas aspartat aminotransferase saliva. Aspartat aminotransferase merupakan salah satu indikator biologis yang dilepaskan ke dalam cairan celah gusi. Aplikasi gaya ortodonti pada gigi dapat meningkatkan aktivitas aspartat aminotransferase dalam cairan celah gusi. namun peningkatan aktivitas aspartat aminotransferase dalam cairan saliva akibat gaya ortodonti belum diketahui. Tujuan: (1) mengevaluasi durasi pemberian gaya ortodonti terhadap aktivitas aspartat aminotransferase di dalam saliva berdasarkan durasi pemberian gaya. (2) mengevaluasi korelasi jarak pergerakan gigi dengan aktivitas aspartat aminotransferase. Metode: Pengumpulan 20 sampel saliva subjek dilakukan sebelum pencabutan gigi premolar pertama, sebelum dan sesudah pemberian gaya untuk penarikan kaninus ke distal. Penarikan kaninus menggunakan gaya interrupted (module chain) sebesar 100g selama 30 hari. Pengambilan saliva dan pengukuran jarak pergerakan gigi kaninus dilakukan 1 hari, 7 hari, 14 hari, 21 hari, dan 28 hari setelah pemberian gaya. Pengukuran aktivitas aspartat aminotransferase dalam saliva menggunakan alat spektrofotometer. Hasil: hasil penelitian menunjukkan pemberian gaya ortodonti dapat mempengaruhi aktivitas aspartat aminotransferase dalam saliva (F=25,290, p=0,000). Jarak pergerakan gigi berkorelasi dengan aktivitas aspartat aminotransferase (F=0,429, p=0,000). Simpulan: Aktivitas aspartat aminotransferase dapat digunakan sebagai indikator jarak pergerakan gigi berdasarkan durasi pemberian gaya.

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Aspartate aminotransferase is one of biological indicator in gingival crevicular fluid (CFG). Force orthodontic application could increase activity of aspartate aminotransferase in CFG. However, the increase activity of aspartate aminotransferase in saliva due to orthodontic force and its correlation between aspartate aminotransferase activity and tooth movement remains unclear. Objectives: To evaluate application orthodontic force on the aspartate aminotransferase activity in saliva based on the duration of force and finding correlation between tooth movement and aspartate aminotransferase activity. Methods: Twenty saliva samples collected before extraction of first premolar, at the time of force application for canine retraction and after force application. The canines retraction used 100grams of interrupted force (module chain) for thirty days. The collection of saliva and the measurement of tooth movement were carried out 1 day, 7 days, 14 days, 21 days, and 28 days after force application. The measurement of aspartate aminotransferase activity in saliva was done using spectrophotometer. Results: Application of orthodontic force influences the salivary aspartate aminotransferase activity (F=25.290, p=0.000). Furthermore, tooth movement correlated with aspartate aminotransferase activity (F=0.429, p=0.000). Conclusion: Aspartate aminotransferase activity could be used as tooth movement indicator that related to the duration of force application."