Background: Streptococcus mutans in the most frequent microbiota that causes pulp necrosis because of caries. The microorganism that is colonized and embedded in the biofilm matrix is resistant to antimicrobials compared to planktonic cells. Root canal sterilization materials must have good biocompatibility with tissues. Nannochloropsis oculata is an algae that contains various compounds such as terpenoids, alkaloids, and flavonoids that have potential as antibacterial and antioxidant and can be used as alternative to root canal sterilization. Method: This research was true experimental laboratory research with post-test only control group design. The antibacterial potential of Nannochloropsis oculata was tested using the biofilm method, divided into 5 groups. The control group was: K- (aquadest), K+ (calcium hydroxide), and the treatment group was given Nannochloropsis oculata: P1 (0.625%), P2 (1.25%), and P3 (2.5 %). Congo Red method test was to determine the formation of biofilm that shows black strains on agar. While biofilm test with Microtiter Plate Assay to measure the value of biofilm that were inhibited in Optical Density (OD) value in the ELISA Reader. The lower the value, the more biofilm inhibited, with OD value, inhibition percentage could counted Result: The result of all treatment groups were increasing in percentage inhibition value shows inhibition in biofilm growth (p <0.05). Conclusion: Nannochloropsis oculata had an antibacterial effect on the biofilm of Streptococcus mutans

Introduction. Factors that cause failure of endodontic therapy include incomplete cleaning and shaping of root canals and unhermetic obturation. Endodontic failure can lead to periapical lesions. Apicoectomy is one of endodontic surgery treatment choice to preserving the tooth with endodontic treatment failure. Aim. The aim of this report was to show that in cases of failure of root canal treatment could be treat without extraction, however there was an alternative treatments such as apicoectomy that could be used to preserve the tooth and its function in the oral cavity.Case. A male 32 years old patient came to dentist with persistent pain on upper left first premolar. The tooth had been endodontically treated for ten years. Clinical examination tooth #24 had porcelain fused to metal on it, percussion test (+), bite test (+), pain on palpation. Radiographic examination showed that tooth #24 had fabricated post without gutta percha obturation on apical third. There was 3 mm round periapical lesion on the distal side of the tooth. Procedure Apicoectomy and retrograde filling with Mineral Trioxide Aggregate (MTA) and bone graft was performed to eliminate that periapical lesion. Conclusion Apicoectomy is one of main choice to preserve post endodontic tooth with periapical lesion and post core crown on it, as long as possible in oral cavity Keywords : Apicoectomy, Periapical lesion, Post endodontic treatment failure

<p><strong><em>Background : </em></strong><em>A common objective of anterior restorative dentistry is to establish anterior guidance between the maxillary and mandibular anterior teeth to disclude the posterior teeth during protrusive mandibular movement. Fracture anterior teeth leads to psychological trauma, along with functional and esthetic debilitations. Healthy anterior teeth play an important role of protecting the posterior teeth during excursive mandibular movement. The contour and shape of the labial surface are important for esthetic purpose; the palatal surface morphology is critical for harmonious function. Premature contact in palatal surface restoration is considered as contributing factor to temporomandibular disorder (TMD) symptoms. <strong>Purpose : </strong>Improve aesthetics and function of the patient's anterior teeth. <strong>Case : </strong>Male, 17 years old with poor aesthetic because of fracture anterior teeth 4 years ago. <strong>Case Management : </strong>Root canal treatment, treatment of root resorption, fiber post, custom post, indirect veener, zirconia crown and enameloplasty. <strong>Result : </strong>Better aesthetic and get the optimum function of his teeth.</em></p><p><em> </em></p><p><strong><em>Keyword:</em></strong><em> Aesthetic treatment, anterior fracture, zirconia crown, indirect venner</em></p><p><em> </em></p><p><strong><em>Correspondence:</em></strong><em> </em><em>Sinta Puspita</em><strong>, </strong><em>Department of </em>Conservative, Faculty of  Dentistry, Hang Tuah University, <em>Universitas Hang Tuah, Arif Rahman Hakim 150 Surabaya, </em><em>Phone</em><em> 031-5945864, 5912191,  Email:</em> <em><a href="mailto:sinta_wirawan09@yahoo.com">sinta_wirawan09@yahoo.com</a></em></p>

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