Within the limitations of this study, it can be extrapolated that, although this class of alginate impression materials was manufactured for extended pour purposes, clinicians should avoid storage of the studied brands for 6 h. Whenever 1 h to pour is necessary, 100% controlled humidity is the ideal and standardized environment for all three alginate brands. Perhaps, Cavex Colorchange, and Kromopan can be safely stored in uncontrolled humidity condition while maintaining their optimal dimensional accuracy.
Background: The recent bracket systems are passive self-ligating orthodontic appliance systems, which have been shown to have superior load transfer toward the fibers of periodontal ligament than the preadjusted edgewise (PEA) orthodontic appliance systems. Corticosteroids have been shown to affect bone turnover, therefore, it is crucial to know if they affect orthodontic tooth movement and cortical bone resorption in partially edentulous patients. Hence, the aim of the present study was to analyze the effect of corticosteroid therapy on tumor necrosis factor (TNF)-alpha during orthodontic tooth movement with PEA appliance and self-ligating technique and alveolar bone loss in partially edentulous patients. Materials and Methods: Ninety-two participants were included in the study. They were divided randomly into four different groups. Group A: PEA appliance, Group B: self-ligating appliance, Group C: partially edentulous patients, and Group D: healthy controls. The test groups were administered injections of corticosteroids, namely triamcinolone acetonide, intramuscularly in the preparation of 1 mg/kg/day each day for 7 days. Control group research participants received a placebo injection. Gingival crevicular fluid (GCF) sampling was done with Gapadent #30 ISO Paper Points according to the Offenbacher et al. technique (1986). A human TNF-Quantikine enzyme-linked immunosorbent assay kit was used to quantify TNF-α contents in the samples. The GCF collection was performed using the same techniques at baseline, 1 h, 24 h, and 168 h after the bracket installation samplings. Results: Concentration of TNF-α decreased in all groups at 1 h and 7 days when compared with the baseline. When there was a comparison between the groups, then it was observed that TNF-α decreased in all three test groups compared to baseline. The decrease was more in the preadjusted appliance as compared with the self-ligating appliance. The decrease in the concentration of TNF-α was greater in the preadjusted appliance as compared with the self-ligating appliance showing that inflammatory reaction was more reduced in the preadjusted orthodontic appliance, and the tooth movement was affected more in such appliance after corticosteroid therapy. Conclusion: There was also a significant decrease in the concentration of TNF-α in partially edentulous subjects after corticosteroid therapy.
Aim: The purpose of this study was to evaluate the impact of silver nanoparticle incorporation into maxillofacial silicone material on its hardness tear strength and color stability. Methodology: A total of 90 silicone specimens were fabricated. The control samples were fabricated with- out silver nanoparticles and test samples were fabricated with 20 ppm concentration of silver nanoparticles. Digital shore A hardness tests was used to measure hardness, for tear strength the specimen was placed in the jaws of the universal testing machine and stretched at a rate of 500 ram/rain, for color stability Spectrophotometer had been employed. The independent sample’s “t” test was used to test significant differences. Results: The mean difference for hardness between control and test group was 0.54 and t value was 2.08 and ( p < 0.05).tear strength 0.66 and “t”value was 0.93 and ( p < 0.05) and for color stability it was -0.02 and t value was -0.92 and ( p < 0.05). Conclusion: The present study findings suggest that addition of silver nanoparticles at 20 ppm concentration decreased the hardness of silicone elastomer, and it did not affect tear strength and color stability.
Background: Alveolar bone resorption occurs in the majority of patients following teeth extraction. The present study was conducted to assess commercially available bone graft material in the implant placed socket to enhance the osteointegration. Materials & Methods: The present study comprised of 64 patients of both genders. Concentrated growth factor (CGF) was prepared according to Sacco’s protocol, using the patients’ own venous blood. Extraction of mandibular first molars was carried out and implants were immediately placed with CGF grafting. A Cone Beam Computed Tomography (CBCT) was taken immediately after implant placement and after six months of undisturbed healing to assess the quantity and quality of new bone formed around implants. Results: Out of 64 patients, males were 40 and females were 24. The mean bone height was on buccal side immediately was 9.04 and after 6 months was 11.3, on lingual side immediately was 10.6 and after 6 months was 11.8, on distal side immediately was 8.3 and after 6 months was 11.0, on mesial side immediately was 7.5 and after 6 months was 11.2. The difference was significant (P< 0.05).
Introduction: The lifespan of an edentulous mandible with one median implant to hold a full denture for 24 months was evaluated to see if the early loading had any impact on it. Single-implant denture retention for the mandibular region was proposed by “Cordioli et al. in the 1990s. Objectives: Whether rapid loading and placement of a “single median implant” may result in the implant survival rate comparable to rehabilitation with a single implant and second-stage surgery. Methods: It was found that 81 of the 158 implant recipients had quick loading, whereas the rest had delayed loading (77 patients). Patients in the context of “delayed loading group” had follow-up appointments at 1 month, 4 months, 12 months, and 24 months. In addition, the nine implants failed in the 3 months after loading in a quick loading group, while just one implant failed before loading. Median implant survival at 2 years was the study’s main goal. Direct loading had a 7% fatality rate advantage over traditional loading because of the alleged advantages of immediate loading, including the avoidance of second-stage surgery. Prosthetic problems were evaluated using Fisher’s exact test. Results: A higher rate of implant survival was not seen when implants were loaded more quickly (P = 0.81). A statistically significant difference (P = 0.019) was seen in implant survival between the therapy groups. Conclusion: Single implant loading in an edentulous mandible has a worse survival rate than delayed loading, according to all available research.
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