Aim: The aim of the study is to acquire evidence for the choice of occlusion with anatomic/modified anatomic teeth in complete denture prosthesis. Settings and Design: Systematic review following PRISMA guidelines. Materials and Methods: The study reviewed original articles on various occlusal schemes bilateral balance occlusion (BBO), lingual occlusion (LO), Canine guided occlusion (CG), posterior group function occlusion (PGFO) have been applied to the complete dentures and were analyzed for the objective or subjective or both evaluations. The data were collected in standard format with the needed information such as year of publication, type of study, occlusal schemes compared, test methodology used, sample size for experiment and control, assessment of retention, stability, and other factors which determine the quality of life and period of follow-up. The risk of bias was calculated using tools RoB2.0 and robvis. At all stages, the inclusion and exclusion of studies were discussed among the reviewers. Statistical Analysis used: Due to the heterogeneity in the data of the included studies no statistical analysis was used. Results: Of the 1896 articles screened only 17 studies were included in the systematic review. These were discussed amongst the reviewers regarding the various occlusion schemes used. The subjective and objective criteria used in the studies was tabulated separately. They were then analyzed for the risk of bias using the robvis 2 tool. Conclusion: No scheme is more superior to the other with the anatomic tooth forms. The use of alternative unbalanced schemes produces a similar satisfactory clinical outcome. The ridge classification also has a significant role to play in the preference for an occlusal scheme.
Introduction: Alloys with high nickel content have been increasingly used for dental prostheses. The dental casting machines are regularly used to make dental restorations. The effects of the casting of the base metal alloys using actyleneoxygen flame casting machine and induction casting machine has not much been studied. Aim: To estimate nickel, chromium, cobalt, and molybdenum metals from as-received dental casting alloy of three different brands and to estimate metals from these alloys after fabrication of crown using actylene-oxygen flame casting machine and induction casting machine. Materials and Methods: This in-vitro comparative study was conducted in the Department of Prosthodontics at School of Dental Sciences, KIMSDU, Karad, Maharashtra, India. Total of 15 crowns were fabricated using actylene-oxygen flame casting machine and 15 crowns by induction casting machine from three different brands of Dental Casting Alloys (DCA) by lost wax technique. Elemental estimation was done for the asreceived pellets and for the crowns fabricated by both methods using X-ray Florescence spectrometry (XRF). Unpaired t-test was used for data analysis. Results: Nickel (Ni), chromium (Cr) and molybdenum (Mo) levels in crowns fabricated by both actylene-oxygen flame casting and Induction casting technique were significantly decreased (Ni: -2.01% to -5.14%, Cr:-7.35% to -29.51% and Mo: -15.70% to -95.94%) in all brands of dental casting alloys. Cobalt level was not detected in all three brands of fabricated crowns by XRF by either of the casting methods. Conclusion: These observations indicate that the elemental composition of the fabricated crowns is decreased as compared to that of As-received crowns, which could be due to the burnout of some amount of elements during casting.
The anterior ridge defects present in a patient are very difficult to treat and they require great amount of planning, like removable or fixed prosthesis and options of implant. Here is a article that describes the process of fabrication of Andrew's bridge to treat a class III anterior ridge defect using natural teeth as abutments for its fixed component followed by a removable component. The procedure of fabricating Andrew's bridge was undertaken when a 26 years old patient came to the department of prosthodontia after being operated for the cleft lip and palate. After the patient was treated with this Andrew's bar system, it was evaluated over a long period of time and accordingly it was concluded that the patient had a good adaptability, comfort, pleasing esthetics and phonetics were achieved as desired and can be given in patients where esthetics due to repositioning of teeth creates difficulties.
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