Glass fiber lebih sering digunakan daripada polyethylene fiber sebagai komponen FRC dalam dunia kedokteran gigi. Glass fiber dental di Indonesia tersedia dalam jumlah terbatas dan memiliki harga yang relatif mahal. Tujuan dari penelitian ini adalah untuk memeriksa komposisi dari E-glass fiber dental dan glass fiber non dental menggunakan teknik XRF sehingga dapat ditentukan tipe dari masing-masing glass fiber non dental. Sampel terdiri dari 10 g E-glass fiber dental, 10 g fiberglass mats, 10 g fiberglass roving dan 10 g woven roving. Masing-masing sampel dihaluskan, selanjutnya dianalisa dengan dengan menggunakan X-Ray Fluorescence Spectrometer (XRF). Hasil analisa XRF sampel menunjukkan kandungan oksida terbesar pada E-glass fiber dental adalah SiO2 (45,47%), CaO (38,49%) dan Al2O3 (12,11%). Kandungan oksida terbesar pada fiberglass mats adalah SiO2 (56,88%), CaO (16,24%) dan Na2O (12,91%) demikian pula dengan woven roving yaitu SiO2 (55,86%), CaO (18,71%) dan Na2O (11,80%). Sedangkan fiberglass roving menunjukkan kandungan oksida terbesar antara lain SiO2 (52,56%), ZrO2 (14,64%) dan CaO (10,03%). Hal tersebut menunjukkan bahwa komposisi kandungan oksida pada sampel memiliki kemiripan dengan persentase yang berbeda. Berdasarkan pada analisis XRF disimpulkan bahwa glass fiber non dental jenis fiberglass mats dan woven roving mengarah ke tipe C-glass dan fiberglass roving mengarah ke tipe AR-glass.
Background: A composite resin is used as restorative material in dentistry because it has the same colour as dental enamel, is easy to use in an oral cavity and offers good biocompatibility. Based on the size of filler, composite resin is divided into types, one of which is a composite resin nanohybrid. An important mechanical property of restorative material is microhardness. The mechanical properties of restorative material is highly affected by both polymerisation and heating process. There are many methods to improve composite resin’s microhardness, including preheating and heat treatment. Purpose: The purpose of this study was to evaluate different effects of preheating and heat treatment on the microhardness of nanohybrid composite resin. Methods: This study is an experimental laboratory research with post-test-only group design. Samples were divided into six groups: preheating groups at temperatures of 37oC and 60oC, heat treatment groups at temperatures of 120oC and 170oC, a negative control group and a positive control group. Afterwards, the resulting data were analysed using one-way ANOVA. Results: The result based on the one-way ANOVA test indicated that there was a difference in microhardness in each group with a significance of 0.000 (p<0.005) between preheating and heat treatment. Conclusion: The conclusion of this study was the best microhardness of composite resin nanohybrid is the heat treatment group at temperature 170oC.
Demineralization is a process of partial or full tooth mineral loss which caused by acidic environment, for example the side effect of extracoronal bleaching treatment. Demineralization increases enamel surface roughness which leads plaque accumulation. Whey extract and calcium phosphopeptide-amorphous calcium phophate (CPP-ACP) contain calcium and phosphate that can stop the demineralization through remineralization process. This study aimed to determine the differences of enamel surface roughness after whey extract and CPP-ACP application post- extracoronal bleaching. Experimental laboratory with pre- and post-test control group design was performed on 24 first maxillary premolars which devided into 3 groups. On group I, specimens were immersed in artificial saliva. Specimens in group II were immersed in whey extract meanwhile specimens were immersed in CPP-ACP on group III. Whey extract and CPP-ACP immersions were conducted 10 minutes every 12 hours for 15 days. The enamel surface roughness test was performed twice, after extracoronal bleaching treatment and after 15 days remineralization agent application. This study result indicated significant differences between group I and group II and between group I and group III (p<0.05), but there was no significant difference between group II and group III (p>0.05). This study showed whey extract decreased more enamel surface roughness than CPP-ACP but the difference was not significant statistically. So, whey extract and CPP-ACP showed similar remineralization potential.
Retainer dibutuhkan untuk membantu menstabilkan posisi gigi geligi selama proses reorganisasi jaringan periodontal berlangsung. Retainer FRC ortodonsi dikembangkan sebagai alternatif material estetika serta aman bagi pasien alergi terhadap nikel. E-glass fiber lebih sering digunakan sebagai retainer ortodonsi. Penelitian ini bertujuan untuk mengkaji pengaruh komposisi glass fiber non dental dan penambahan silane terhadap kekuatan geser FRC sebagai retainer ortodonsi. Subjek penelitian terdiri dari 9 kelompok perlakuan dengan 3 jenis glass fiber yang berbeda yaitu glass fiber non dental A (LT, Cina), B (CMAX, Cina) dan C (HJ, Cina). Masing-masing glass fiber diberi perlakuan yang bervariasi yaitu tanpa penambahan silane, penambahan silane 1x dan 2x. Subjek penelitian direndam dalam akuades dan disimpan pada suhu 37ºC selama 24 jam sebelum dilakukan uji kekuatan geser dengan menggunakan alat Universal Testing Machine. Hasil penelitian dianalisis variansi dua jalur dan post hoc Tukey untuk mengetahui perbedaan statistik masing-masing kelompok. Hasil penelitian menunjukkan bahwa glass fiber non dental A dengan penambahan 2x silane memiliki rerata kekuatan geser tertinggi (12,72±2,02 MPa) sedangkan glass fiber non dental B tanpa penambahan silane memiliki rerata kekuatan geser terendah (6,96±1,69 MPa). Terdapat perbedaan bermakna antara komposisi fiber maupun penambahan silane terhadap kekuatan geser FRC (p<0,05). Tidak terdapat perbedaan bermakna pada letak kegagalan FRC (p>0,05). Berdasarkan hasil penelitian dapat disimpulkan bahwa komposisi SiO2 dan Al2O3 yang tinggi pada glass fiber non dental serta penambahan silane dapat meningkatkan kekuatan geser FRC. The Effect of Non Dental Glass Fiber Composition and Silane Addition on The Shear Bond Strength of Fiber Reinforced Composite as An Orthodontic Retainer. Retainers are required to stabilize the position of the teeth to permit reorganization of periodontal tissue. FRC orthodontic retainer was developed as an alternative material aesthetic and safe for nickel allergic patients. E-glass fiber is commonly used as an orthodontic retainer. The purpose of this study was to assess the effect of non dental glass fiber composition and silanes addition on the shear bond strength of the FRC as an orthodontic retainer. This study consisted of 9 treatment groups with three different types of non dental glass fiber, namely non dental glass fiber A (LT, China), B (CMAX, China) and C (HJ, China). Each glass fiber was given a variation treatment, without silanes, one time and two times of silanes addition. All the samples were stored in distilled water at 37ºC for 24 hours and subsequently tested for shear strength by using Universal Testing Machine.The groups were submitted to two way ANOVA analysis of variance with Tukey post test to verify the statictical difference between groups. The results showed that a non dental glass fiber A with two times of silanes addition has the highest shear bond strength (12,72±2,02 MPa), meanwhile a non dental glass fiber B without silane addition has the lowest shear bond strength (6,96±1,69 MPa). There were significant differences between the composition of glass fiber and the addition of silane toward the shear bond strength of FRC (p<0,05). No significant differences in debonded locations of FRC (p>0,05). Based on the results of this study concluded that the composition of the high SiO2 and Al2O3 in the non dental glass fiber and the silanes addition can increase the shear bond strength FRC.
Teeth have an aesthetic value because teeth which are clean, neat and white can increase self confidence. Staining or dental discoloration can disrupt the appearance and cause discomfort. The most common type of discoloration is extrinsic discoloration. Treatment that can be done to overcome extrinsic discoloration is extracoronal bleaching. One way to avoid the extracoronal bleaching side effects is application of remineralization materials. The recommended remineralization materials for post-bleaching are fluoride and phospho peptide-amorphous calcium phosphate (CPP-ACP). This research aims to know the effect of whey extract application and CPP-ACP on tooth enamel hardness after extracoronal bleaching. Experimental laboratory with pre- and post-test control design was performed on 24 first maxillary premolar which devided into 3 groups. On group I, specimens were immersed in artificial saliva. Specimen in group II were immersed in whey extract meanwhile specimens were immersed in CPP-ACP on group III. Whey extract and CPP-ACP immersions were conducted 10 minutes every 12 hours for 15 days. The enamel surface roughness test was performed twice, after extracoronal bleaching treatment and after 15 days remineralization agent application. This study result indicated significant differences between group I and group II and group III (p0,05), but there was no significant difference between group II and group III (p0,05). This study showed the enamel surface hardness after whey extract application is higher than CPP-ACP but difference was not significant statistically
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