Bennett movement has been extensively discussed in the literature, yet the clinical relevance of Bennett’s contribution in the field of Prosthodontics and restorative dentistry remains unclear. An electronic search of articles in PubMed database for relevant literature published between 1958 until present day was meticulously scrutinized with the following search terms: lateral movements or immediate mandibular lateral translation or mandibular side shift or Bennett side shift or Bennett movement. After conducting an extensive and in-depth review of the literature, the authors were unable to conclusively find the clinical relevance of Bennett movement. Moreover, the logical sequence could not be negated fully. For the beginners in the profession, it is desirable to incorporate this for intellectual and logical satisfaction until new research proves otherwise. The Bennett movement have little or no clinical impact in a restorative occlusal scheme.
The facial region defects caused by trauma, accident, tumour or congenital defects are treated with maxillofacial prostheses. A part from esthetics, the most common problem encountered with these prostheses is the retention of prostheses. Recent techniques along with newer materials, treatment options, and its application are described. The success of maxillofacial prostheses in meeting the expectations of patients and prosthodontists is on rise with the development of adhesive material science, the emergence of technical knowledge, and the development of implant technology. Increase in retention provides ease of use and psychological acceptance by the patient thereby improving the long-term prognosis of the prosthesis. In the present article review, the methods used for the retention of prostheses from past to present along with the advantages of adhesives and implants, implementation of 3D technology and rapid prototyping were critically appraised.
Background: Poly methyl methacrylate (PMMA) is widely used in dentistry as a denture base material. But the material has some inherent drawbacks in its mechanical properties like impact strength and flexural strength which can lead to fracture of the prosthesis. So the present study was conducted to evaluate and compare both impact and tensile strength in conventional acrylic resin and veined acrylic resin reinforced with one weight percentage titanium dioxide nanoparticles. Objectives: 1. To determine and compare the effect of incorporation of titanium dioxide nanoparticles on tensile strength in megapascals between heat activated and veined acrylic denture base resins. 2. To determine and compare the effect of incorporation of titanium dioxide nanoparticles on impact strength in kilo joules per meter square between heat activated and veined acrylic denture base resins. Materials and Methods: 80 specimens were prepared and grouped into Eight groups (A1, A2, B1, B2, C1, C2, D1, and D2) with10 specimens in each. Group A1, A2, B1 and B2 was used to study tensile strength and Group C1, C2, D1 and D2 was used to study impact strength. Group A1 and C1 were conventional heat cure acrylic, group A2 and C2 were the modified ones with one weight percentage (1wt%) titanium dioxide nanoparticles, groups B1 and D1 were veined acrylic, group B2 and D2 were the modified veined acrylic with 1wt% titanium dioxide nanoparticles. Tensile strength was tested using INSTRON universal testing machine and impact strength was tested using IZOD impact tester. Results were analyzed using independent t-test followed by Bonferroni's correction to control the p value. Results: Mean and standard deviation of tensile strength of group A1 was 53.21±10.36 Mpa, group A2 was 56.87±3.96 Mpa, group B1 was 44.48±3.31Mpa and group B2 was 53.16±4.62 Mpa. The mean and standard deviation of impact strength of group C1 was 8.72±0.78 Kj/m2, group C2 was 10.10±0.40 Kj/m2, group D1 was 9.23±0.34 Kj/m2 and group D2 was 7.01±0.66 Kj/m2. Mean and standard deviation were subjected to the statistical analysis and p-value less than 0.05 is statistically significant. Tensile strength was significantly higher in titanium dioxide nanoparticles incorporated veined polymethyl methacrylate than unmodified veined polymethyl methacrylate (p-value was 0.0001) while there was no significant change between the nanoparticles incorporated conventional heat cure acrylic and conventional heat cure acrylic resin. There was significant increase in impact strength of the modified conventional acrylic resin compared to the unmodified one but there was a significant decrease in impact strength of the modified veined resin compared to the unmodified veined ones. Conclusion:The results showed an increase in tensile strength for veined acrylics and increase in the impact strength of conventional acrylic without much change in tensile strength after incorporation of titanium dioxide nanoparticle. Hence titanium dioxide nanoparticles can be incorporated into the conventional denture base ...
The resistance of the periimplant tissues to inflammation is evidently much lower with the implant than that of natural teeth. In order to maintain periimplant health, and prevent implant failure, it is important to understand the relationship between abutment surface characteristics and plaque attachment. The aim of this study is to assess whether the surface roughness of three commercially available dental implant abutments are less than or equal to the clinical threshold value R(a) 0.2µm for bacterial retention that may eventually contribute to periimplantitis. Abutments from Adin , Nobel Biocare, and Myriad implant systems are sectioned into 2×2 mm dimension samples using High Speed Stainless cutting tools. To investigate the surface microstructure of the samples, three dimensional imaging and numeric analysis are done using AFM (Atomic Force Microscope). The results showed that the surface roughness values of the three groups Adin, Myriad and Nobel Biocare are less than the clinical threshold value R(a) 0.2µm and among them Myriad has the least surface roughness. Since the surface roughnesses are less than 0.2 μm, it was concluded that professionals can give preference to any of the abutments systems.
Any prosthodontic procedure aims to restore a patient's function, contours, aesthetics, speech, and health to normal. In traditional complete dentures, achieving optimal denture stability is always found to be a challenge. This is often exacerbated in resorbed mandibular ridges. Therefore, this article describes a strategy for enhancing the retention of mandibular complete dentures for individuals with an extremely resorbed ridge. A patient reported to the department of prosthodontics with a chief complaintof loose dentures and wanted to get them replaced. A complete clinical examination was carried out which revealed severely resorbed mandibular ridge. After a complete evaluation, prosthetic rehabilitation with a complete denture using the neutral zone technique was panned. The complete denture was made and delivered to the patient was superior in terms of stability, function and aesthetics. The clinician should understand the advantages of the neutral zone technique and implement it in clinical practice sothat a prosthesis that is functionally, physiologically and psychologically acceptable to the patient can be delivered.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.