Background Proper cement selection in fixed prosthesis plays a determinative role in providing long-term serviceability, retention, caries prevention, and patient satisfaction. This study, reviews different luting agent characteristics and their application based on different clinical situations and different types of full coverage restorations. Material and Methods An electronic search was conducted through PubMed, Medline, and Google scholar using following keywords or combinations: restoration, full coverage, PFM, porcelain fused to metal, all ceramic, zirconia, ceramic, casting, fixed partial denture, cement*, dental cement, cement selection, and retention. The most related articles were selected for review. Results Choosing a proper luting agent is highly dependent on scientific knowledge regarding the characteristics of restorative materials and luting agents. Conventional cements could be indicated in various situations; however, some restorative materials or clinical situations call for resin-cements to provide predictable retention, support, and durability. Conclusions Conscious selection of retentive cement for each type of restoration/material is necessary to provide predictable successful treatment and reduce the potential complications. Key words: Adhesive cement, dental bridgework, dental cements, dental crowns, dental porcelain, prostheses and implants.

Introduction: Stem cells and tissue engineering have shown great potential in the treatment of periodontal diseases since their introduction. Mesenchymal stem cells are undifferentiated cells that can differentiate into different tissues. The aim of this study was to evaluate the effectiveness of different types of these cells in the treatment of periodontal defects.Description: Mesenchymal stem cells exist around different tissues and can be obtained and used from different intraoral or extraoral sources for periodontal tissue regeneration procedures. Among extracellular stem cells, bone marrow stem cells followed by adipose tissue stem cells have shown promising results regarding the ability of these cells to regenerate the periodontium. Among intraoral sources, periodontal ligament mesenchymal stem cells and then dental pulp cells have shown more results and ability compared to other cell types to regenerate periodontal tissue. Periodontal ligament stem cells have also been able to generate sharpey fibers in periodontal regeneration procedures in various studies.Conclusion: Mesenchymal stem cells have shown promising results for use in periodontal tissue regeneration processes. However, due to the limited clinical and preclinical studies performed so far, more studies are needed for assessing the clinical use of these generative of cells.

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In this report, we have introduced a novel technique for marsupialization treatment in a 50-year-old edentulous female patient with residual cysts in the mandibular bone. The clinical symptoms and para-clinical founding in addition to the surgical procedure and post-operative outcome have been discussed.