Aim: The present study aims to evaluate the impact strength of PMMA incorporated with TiO 2 nanoparticles by two different processing techniques i.e. water bath and microwave processing techniques. Materials and methods: A total of 80 samples made of PMMA were divided into four groups. Each group includes 20 samples with group I and II comprising of samples made of normal acrylic resin and acrylic resin reinforced with 1 wt% TiO 2 nanoparticles processed with conventional water bath technique respectively, groups III and IV include normal acrylic resin and acrylic resin reinforced with 1 wt% TiO 2 processed using microwave technique respectively. The specimens were tested for impact strength using IZOD pendulum impact tester. The impact energy values obtained were analyzed statistically. Results: The results through one-way ANOVA showed a high mean impact strength with group IV samples (23.13) and lowest with respect to group I (19.42) with highest statistical significance (p < 0.001). A post hoc Tukey test intergroup analysis showed a statistically significant difference between group I and other groups, whereas there was no statistical significance associated with other intergroup comparisons. Conclusion: PMMA with its current drawbacks in the physical and mechanical properties requires modifications to make it an ideal denture base material. The current investigation evaluates that a high mean impact strength with samples made of PMMA incorporated with TiO 2 nanoparticles processed by microwave technique was obtained when compared with normal acrylic resins processed by water bath technique. Clinical significance: The methodology of current study can be used while processing of denture bases for patients to evaluate the effect of oral environment on inclusion of TiO 2 nanoparticles with microwave processing in a clinical setup. This could help in reducing the amount of fractures associated with heavy load masticatory stresses and improving the mechanical properties in denture bases.
Background: Age estimation is of prime importance in forensic science and clinical dentistry. In children, age estimation can be done by skeletal maturity indicators like hand-wrist radiographs and dental age estimation. Skeletal maturity indicators compared with dental age estimation is limited as they are influenced by various environmental parameters, whereas calcification of teeth depends on genes rather than environmental factors. Many of the dental age estimation methods use extracted teeth, which are quite invasive, whereas Cameriere's method is a recently introduced radiographic method first in European population; where in age estimation is done using open apices of teeth by orthopantomogram (OPG). Indian-specific formula was introduced later using permanent mandibular teeth on left side of jaw. The present study aimed to estimate the age and also to determine the accuracy of Cameriere's method using Indian-specific formula on both right and left sides of mandible in Khammam population of South India and also to determine the side which can be efficient in determining age. Methodology: The present study comprised radiographs of 50 subjects (25 boys and 25 girls) ranging from 5 to 15 years. The soft copies of the radiographs of selected subjects were retrieved from the computer attached to the digital orthopantomogram machine (Orthophos XG5; Sirona Dental Systems). The 7 left and right permanent mandibular teeth were assessed in OPGs. The number of teeth with closed apical and with open apical ends of roots was examined and measured. The values were tabulated based on the Cameriere method of age estimation using Indian-specific formula. Statistical analysis was done using paired t test and Karl Pearson's correlation coefficient test. Results: Comparison of dental age with chronological age in males showed non-significant results on both left and right sides of the OPG with a p value of 0.3765 and 0.3045, respectively. Likewise in females, p values of 0.2167 and 0.8089 were noted. When males and females were compared, non-significant results were obtained with a p value of 0.1613 in the age estimated on the left side of the OPG and a p value of 0.4322 on the right side of the OPG. Correlation test showed that left side of the OPG showed better results in determining age than the right side of the OPG with an r value of 0.9982 and 0.9485 in males and females, respectively.
Implant overdentures have ended up being one of the most incredible elective choices in prosthetic recovery of different instances of edentulism. They fulfill the patient's expectations, work on personal satisfaction with their drawn out workableness and unsurprising results. Throughout the long term, critical progressions have occurred in the embed frameworks and the strategies for connections. This paper depicts a case report in which a totally edentulous patient was restored with implant overdenture in mandible and a total denture replacement in the maxilla
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