Aim: The rate of healing of periapical lesion after the antibacterial dressing with triple antibiotic paste and calcium hydroxide was assessed. Materials and Methods: Case reports which used triple antibiotic paste and calcium hydroxide as the intracanal dressing was searched in PubMed, Google Scholar and Cochrane Oral Health's Trials Register up to August 2020, without language and period restriction. Two authors independently reviewed all identified titles and abstracts for eligibility. Tables were generated to summarize the included studies. Results: Sixteen ( n = 16) articles met the eligibility criteria. Nonsurgical endodontic treatment was carried out in eleven cases with triple antibiotic paste and in nineteen cases calcium hydroxide was used. Results of the study after analyzing the case reports indicate that both triple antibiotic paste and calcium hydroxide are equally effective as intracanal medicament. In cases where calcium hydroxide failed to eliminate symptoms, triple antibiotic paste was found to be effective. Conclusion: As far as the effect on the healing of the periapical lesions is concerned, all the studies showed a high success rate. Available scientific data indicates nonsurgical treatment can be adopted as a routine measure to conservatively treat large periapical lesions of endodontic origin.

Need for the study: Incisors are commonly damaged by caries or trauma. The major portion of the crown part of a damaged anterior tooth could be restored with a core build-up material which not only reinstate aesthetics but also withstand an array of forces in the oral cavity. Aim: To evaluate the Shear Bond Strength(SBS) of Zirconomer, Resin Modified Glass Ionomer cement(RMGIC), Microhybrid Composite and Nanocomposite as core build-up materials in maxillary anterior teeth. Methodology: 48 extracted intact human maxillary central incisors were collected and divided into four groups.Anatomic crown was trimmed upto fifty percent which involved the enamel and partly the dentin of each tooth. The experimental teeth were mounted in chemical cure acrylic resin and restored with Zirconomer, RMGIC, Microhybrid Composite and Nanocomposites. The samples were subjected to Shear Bond Strength(SBS) analysis using a universal testing machine (UTM). Results: Composites exhibited better mechanical properties than Glass Ionomer Cements. Nanocomposites had the highest Shear Bond Strength followed by microhybrid composites but there was no statistical significance. Conclusions: Nanocomposite possess better mechanical properties and also offers superior esthetics due to its supercilious polishability, proving to be the ideal core build-up material for maxillary anterior teeth. Key-words:Core build up- Composite-Glass Ionomer Cements-Shear Bond Strength

Objective The diagnosis of any dental pathology can vary from being simple to challenging. While the use of cone beam computed tomography (CBCT) is well established, magnetic resonance imaging (MRI) remains a proof of concept. This systematic review aims to compare the diagnostic ability of MRI with CBCT in diagnosing periapical pathosis. Materials and Methods This systematic search was performed using the electronic databases of MEDLINE, Cochrane Library, Google Scholar, and Science Direct to identify relevant articles from 2010 to 2020. The search terms used were magnetic resonance imaging, cone beam computed tomography, diagnosis, and periapical diseases. Result In total, 3218 potentially relevant abstracts and titles were identified. After removing duplicates, 1288 articles were reviewed for titles and abstracts, and 29 articles were selected for full-text reading. From those, 19 articles were finally selected that included original research studies, case reports, and case series and were included for systematic review. Most of the studies included in this review suggested that the combined use of CBCT and MRI is needed for a better and more precise diagnosis of complex periapical pathoses. The main advantage of MRI is its ability to image soft tissues usingnonionizing radiation, and the main disadvantage in the case of CBCT is overdiagnosis of the lesion. Conclusion MRI has various advantages over CBCT with similar diagnostic utility. When diagnosing periapical pathogens, both MRI and CBCT are needed for an accurate diagnosis.

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