Implan gigis based on metal still has weaknesses. New development is currently developed with the surface modification of multilayer coatings Ti-Al-Cr and hydroxyapatite on calcium phosphate cement (CPC) for Implan gigi application. Objective: To analize the thickness of multilayer coating alloy Ti-Al-Cr and hydroxyapatite on CPC synthesis by sol-gel method. Methods: Scanning electron microscopy (SEM) was conducted to analyze the thickness and morphology of microstructure layer formed on CPC. Result: SEM showed that coating Ti-Al-Cr on CPC successfully formed 1µm of thickness and showed 10µm of hydroxyapatite. Conclusion: The innovation of modification surface multilayer coatings Ti-Al-Cr and hydroxyapatite on CPC was successfully done by sol-gel method with a variety thickness. ABSTRAKModifikasi permukaan pada semen kalsium fosfat dengan multilapis Ti-Al-Cr dan hidroksiapatit dengan metode sol-gel. Implan gigi berbahan dasar logam paduan titanium Ti-Al-Cr dilapisi hidroksiapatit diketahui masih memiliki kelemahan. Oleh karena itu dilakukan pengembangan dengan modifikasi permukaan dengan multilapis Ti-Al-Cr dan hidroksiapatit pada semen kalsium fosfat untuk aplikasi implan dental. Tujuan: Penelitian ini bertujuan untuk melihat ketebalan multilapis logam paduan Ti-Al-Cr dan hidroksiapatit pada CPC dengan sintesis metode sol-gel. Metode: Analisis ketebalan multilapis dan mikrostruktur logam paduan Ti-Al-Cr dan hidroksiapatit pada CPC dilakukan dengan menggunakan Scanning Electron Microscopy (SEM). Hasil: SEM menunjukkan lapisan logam paduan Ti-Al-Cr pada CPC berhasil dibentuk dengan ketebalan 1µm sedangkan lapisan hidroksiapatit yang terbentuk adalah 10µm. Simpulan: Modifikasi permukaan dengan multilapis Ti-Al-Cr dan hidroksiapatit pada CPC berhasil dilakukan dengan menggunakan metode sol-gel dengan ketebalan bervariasi.

Calcium hydroxide [Ca (OH)2] has been the gold standard for endodontic medicament as inter-appointment dressing, due to its ability to act as antimicrobial agent and to promote hard tissue healing. The main mechanism of this material is the release of Ca2+ and OH- ions through its vehicle, providing high alkaline pH. Indonesia, has many potential resources, namely limestone (CaCO3), that can be utilized as raw material for Ca (OH)2. The objective of this present study is to investigate the synthesis and characterization of Ca (OH)2 from Indonesian limestone as endodontic intra-canal medicament. Limestone were taken from Palimanan area in West Java, Indonesia. CaCO3 was calcined at 900°C for 4h resulting CaO powder. CaO powder were mixed with distilled water using a rotary stirrer for 24h and produce Ca (OH)2 paste. The Ca (OH)2 paste was dried at 80°C, then crushed using a mortar and pestle to obtain Ca (OH)2 powder. The powder samples were thus subjected for characterization by X-Ray Diffraction (XRD) and Fourier-Transform Infrared (FTIR) Spectroscopy. The XRD patterns revealed that the high peak of Ca (OH)2 crystallinity was successfully achieved in this study. The FTIR spectroscopy also showed bands at 3640 cm-1 which belongs to OH- stretching vibration of the Ca (OH)2. The results indicate that the synthesize of Indonesian limestone as Ca (OH)2 by this method was attained. Indonesian limestone is a potential raw material that can be used as a precursor for synthesis of Ca (OH)2 as endodontic material.

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Various bioceramic materials including zirconia and hydroxyapatite have been developed for various applications. Hydroxyapatite (Ca10(PO4)6(OH)2, HAp) is one of the most interesting features of calcium phosphate-based bioceramic that widely used in various applications especially for bio-application, bone engineering, and dentistry. However, the applications of pristine HAp have limited due to low load bearing applications. The wet chemical precipitation techniques was used to synthesize the solids based on zirconia. Hydroxyapatite and zirconia powder (0-30 weight %) were mixed homogeneously. Structure and morphological were characterized by SEM JEOL-JSM-T330A. The presence of functional group was observed by FTIR. Hardness value of material was measured by using Vickers hardness test measurement. Through this techniques, pure hydroxyapatite precipitate was obtained. Sintering temperature is an important factor that could influence the hardness of zirconia-doped hydroxyapatite. Based on the SEM observation, zirconia-doped hydroxyapatite were developed in blended morphology. FTIR results shows the interaction between hydroxyapatite and zirconia. Increasing zirconia increased the hardness value of zirconia-doped hydroxyapatite. Eventually, these ceramic-based materials could be developed for dental materials applications.

Recurrent endodontic infections of treated teeth are mainly linked to microbial persistency in the root canal system. Enterococcus faecalis is a bacterium that is often identified in these recurrent infections. Calcium hydroxide (Ca(OH)2) is a widely used root canal medicament and is now being developed to be produced from natural materials. Ca(OH)2, which is synthesized from natural limestone from Palimanan, Indonesia, has a structure similar to Ca(OH)2, which is often used as a root canal medicament. The purpose of this study was to determine the antimicrobial property of Ca(OH)2 paste synthesized from natural limestone compared to conventional Ca(OH)2 paste. This study is an in vitro experimental study consists of 3 groups (n=24, namely, conventional Ca(OH)2 paste, limestone synthesized Ca(OH)2 paste, and saline as the negative control, for 2 intervals of time and evaluated by Total Plate Counting (TPC) method. Samples were mandibular first premolar root canal prepared by root canal preparation and contaminated with E. faecalis (ATCC 29212). The infected root canals of each group were treated by the medicaments, and samples from the root canals were taken on day 7 (n=4) and 14 (n=4). Results showed that both Ca(OH)2 groups had antimicrobial activities against E. faecalis. The limestone Ca(OH)2 paste group had the least amount of bacterial colonies on the 7th day compared to other groups. In contrast, on the 14th day, the conventional Ca(OH)2 paste had the least bacterial colonies. It can be concluded that the Ca(OH)2 paste synthesized from natural limestone has an antimicrobial effect on E. faecalis, the antimicrobial effect was higher on the 7th day but decreases on the 14th day, whereas the conventional Ca(OH)2 had a higher antimicrobial effect on day 14 compared to day 7. Further studies are expected to improve the long-term antimicrobial effectiveness and sustainability of the natural limestone synthesized Ca(OH)2 paste.