Comparative evaluation of microleakage around Class V cavities restored with alkasite restorative material with and without bonding agent and flowable composite resin: An in vitro study

Background: Marginal adaptability of restorative material is one of the prime factors for success of a restoration. Aim: To evaluate microleakage at enamel restoration and dentin restoration interface of Class V cavities restored with new alkasite restorative material Cention-N, with and without using bonding agent and flowable composite resin. Materials and Methods: Thirty Class V tooth preparations were divided into three groups (n = 10): Group-I restored with Cention-N (Ivoclar Vivadent) without adhesive, Group-II was restored with Cention-N after application of eighth-generation bonding agent (3M ESPE, Single Bond Universal Adhesive), and Group-III was restored with flowable composite resin (Tetric-N-Flow, Ivoclar Vivadent). All samples were subjected to 200 thermocycles between temperature baths at 5°C and 55°C. All samples were cut longitudinally through the center of the restorations with the help of isomet diamond saw. The sections were then observed under binocular stereomicroscope at 20×. Two evaluators scored the depth of dye penetration independently at enamel and dentin margins. Statistical Analysis: Kruskal–Wallis nonparametric analysis followed by Dunn's multiple comparison tests were done to evaluate differences among the experimental groups. Mann–Whitney test was used to compare the difference between occlusal and gingival scores within each restoration. Results: Microleakage seen in decreasing order: Cention-N without adhesive >Flowable composite >Cention-N with adhesive. Conclusion: Microleakage at enamel restoration interface was less than microleakage at dentin restoration interface of each group, but the difference was not statistically significant. Least microleakage was seen with Cention-N with adhesive followed by flowable composite. More microleakage was seen with Cention-N without adhesive.

The autologous platelet rich fibrin: A novel approach in osseous regeneration after cystic enucleation: A pilot study.

Context: The platelet rich fibrin (PRF) is second generation platelet concentrate that has been widely used and researched for stimulation and acceleration of soft tissue and osseous healing. Its continuous delivery of growth factors and proteins mimic the need of physiological wound healing and regenerative tissue processes. Aims and Objectives: The aim of this study was to evaluate the efficacy of PRF in osseous regeneration after enucleation of cystic lesions. The objectives of this study were: (1) To evaluate osseous regeneration radiographically with the use of PRF in intrabony defects after cystic enucleation. (2) To evaluate the degree of bone density in intrabony defects with the use of PRF postoperatively after 1st, 3rd, and 6th months. Subjects and Methods: 10 cases of cystic lesions were treated using PRF after cystic enucleation. Follow‑up radiographs (orthopantomogram) were taken 1st, 3rd, and 6th months postoperatively. Bone density was measured with grayscale histogram using Adobe Photoshop 7.0 software. Results: The subsequent follow‑up examinations revealed progressive, predictable, and significant radiographic osseous regeneration. Conclusion: The use of PRF in management of cystic lesions seems to be a novel therapeutic approach promoting faster osseous regeneration within 6 months postoperatively however further study is required with larger sample size and with a control group.

Reinforcement Effect Of Polyethylene Fiber In Root Filled Mandibular Molar: An Invitro Comparative Evaluation Of Two Different Techniques Of Placement .

Endodontic therapy, today, forms an integral part of everyday dental practice. The large number of teeth being treated endodontically makes it imperative for the dentists to provide satisfactory restoration for those teeth to remain intact within the dental arch as an integral functioning component. So this study was carried out to check the reinforcement of composite with polyethylene fibers placed in two different technique in root filled mandibular molar teeth with mesio-occlusodistal tooth preparation. Fifty freshly extracted molars were divided into five groups of ten teeth each. Group I: Intact teeth (positive control). Group II: Unrestored MOD prepared tooth (negative control). Group III: MOD tooth preparation restored with posterior composite resin. Group IV: Ribbond fiber was placed over the composite resin restoration and exposed fiber was covered with composite resin. Group V: Ribbond fiber was placed on the floor of the tooth preparation and the remaining prepared tooth was restored with composite resin restoration. The samples were subjected to compressive loading on Hounsfield tensometer until failure. The data were recorded and subjected to statistical analysis. Group-IV showed significantly higher fracture resistance than Group-V.