Introduction: For the restoration of grossly decayed root canal treated teeth, posts are used frequently to retain core for the definitive restoration. Therefore, it is necessary to create adequate adhesion at the post-root-cement interface for long-term performance of a post retained restoration. Aim: To establish the outcome of surface pretreatments such as silanization, sandblasting, and silanization followed by thermal activation of fiber posts on bonding with a dual-cured adhesive resin-based cement. Materials and methods: Eighty radiopaque, No #2 glass fiber-reinforced epoxy resin posts (Hi-Rem Posts, Overfibers, Switzerland), posts were wiped with alcohol (surgical spirit, 90% alcohol) for 5 seconds in a single stroke. A cylindrical plastic cap of diameter 10 mm and length of 15 mm, which is closed on one side, was selected. This was duplicated to form molds and fiber posts embedded perpendicularly in the polyester resin, and samples were made. Samples were randomly distributed into four groups based on the pretreatment done and each group contains 20 samples, group I-(control), group II-(silanization), group III-(sandblasting), and group IV-(thermal treatment of silane). After surface treatment, exposed post surface was uniformly coated with dual-cured resin cement. Cement was cured for 40 seconds with a halogen lamp. The samples are subjected to load in a universal testing machine (UTM) at a crosshead speed of 1.0 mm/minutes to evaluate the bonding failure at the interface. Results: Group IV resulted in the highest bond strength values followed by group III. Group II showed a comparatively higher value than group I but less than groups III and IV. Conclusion: Surface treatment procedure, on fiber post by silanization and sandblasting significantly improved adhesion between post and luting cement interface. Clinical significance: The surface pretreatment, such as sandblasting, silanization, thermal activation of silane coupling agents significantly improved, the retention of the post within in the root canal system.

Aim: To systematically review the reported techniques, for evaluating the risk and difficulty encountered in the management of fractured abutment screw in accordance with the location of fracture, and to develop a logical sequence in managing an implant abutment screw fracture. Settings and Design: Systematic review following PRISMA guidelines. Materials and Methods: A systematic search of the PubMed/MEDLINE database for articles published between January 2000 and March 2020 was performed by 2 independent reviewers. Case reports and case series that described the management of fractured implant abutment screw were included. Published articles were qualitatively analyzed employing CARE guidelines and were classified according to the location of screw fracture with respect to implant platform, risk of damage to the implant, and intervention for managing the fractured screw. Statistical Analysis Used: Qualitative analyisis. Results: A total of 28 articles were included in the review. Two of them explained the management of screw fracture at or above the implant platform and required only mild approach with low risk while the others explained the management of screw fracture below the level of implant platform. Among them, 6 were considered mild approach with low risk, 13 moderate approach with moderate risk, and 8 of them severe approach with high risk. Conclusion: Irrespective of the technique, any attempt to retrieve abutment screw fragment poses some risk to the implant which is varying from mild to severe. As the location of fracture is more gingival to the implant platform, difficulty of retrieval as well as risk to the implant increases. The proposed decisionmaking tree will be a useful tool in helping clinicians to manage abutment screw fracture.

Precise articulation of casts obtained from the patient is essential for proper diagnosis, treatment planning and successive prosthetic rehabilitation. In addition accurate transfer of maxillomandibular relation to the articulator eliminates the need for occlusal adjustments in final prosthesis, which require additional time and cost. Thus, it is essential to record this relationship with the least possible error to obtain a successful prosthesis. Knowledgeable application of the properties and the various shortcomings of the interocclusal recording mediums and the techniques used to record the relationship is crucial, while selecting ideal material-technique combination.

Background: Lack of complete wall-to-wall adaptation between implant and abutment of two-piece implants results in microgap at the implant-abutment interface (IAI). Leakage of bacteria and the endotoxins produced by them at the IAI play a major role in inflammatory reactions of surrounding soft tissues, which in turn lead to crestal bone loss. Objectives: The objective of the study is to compare the sealing ability of antibacterial sealing gel and chlorhexidine (CHX) varnish at the IAI by assessing the growth of Escherichia coli on agar plates. Materials and Methods: A total of 36 implants and abutments were selected for the study and divided into three groups. Sealing agents were applied at the IAI of implant groups and a control group without any sealing agent. Abutments were connected to the implants, and bacteria were inoculated. Bacterial percolation was evaluated by culturing the specimen from the internal aspect of implants on agar plates after incubation. Efficacy was evaluated by counting the colonies (colony-forming units) on the agar plates. The results were analyzed by using Kruskal–Wallis analysis of variance followed by pairwise comparison using Dunn-Bonferroni test. Results: Mean of colony-forming units for control was calculated to be 178.38 cfu, for antibacterial sealing gel was 4.75 cfu, and for CHX varnish was 18.63 cfu. In the present study, least value of colony-forming units of bacteria was exhibited by IAIs sealed with antibacterial sealing gel, and the maximum value was given by the control group with no sealing agent at IAI. Conclusion: Application of CHX varnish and antibacterial sealing gel can reduce the bacterial leakage through IAI, whereas complete seal was not attained with either of the materials.