Papers by Vamsi Krishna Dommeti
Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine, 2020
Ever since the introduction of topology optimization into the industrial and manufacturing fields... more Ever since the introduction of topology optimization into the industrial and manufacturing fields, it has been a top priority to maximize the performance of any system by optimizing its geometrical parameters to save material while keeping its functionality unaltered. The purpose of this study is to design a dental implant macro-geometry by removing expendable material using topology optimization and to evaluate its biomechanical function. Three-dimensional finite element models were created of an implant embedded in cortical and cancellous bone. Parameters like the length and diameter of the implant and the bone quality (±20% variation in Young’s modulus, Poisson’s ratio and density for both cortical and cancellous bone) were varied to evaluate their effect on the principal stresses induced on the peri-implant bone tissues and the micromotion of the implant at 150 N applied load. Design optimization is used to select one suitable implant for each material property combination with ...
Magnetorheological damper is modeled to provide semi active suspension system in vehicles .The st... more Magnetorheological damper is modeled to provide semi active suspension system in vehicles .The stiffness of suspension system can be varied by using MR fluid. The project aims at fabrication of MR damper and preparation of magneto-rheological fluid, which can vary its viscosity inside the damper in presence of magnetic field. The damper design is analyzed using FEMM software and magnetic field strength is analyzed at various points. Finally, the damper is tested using fatigue testing machine to test its performance.MR fluid varies its stiffness under magnetic field, this principle is used to control the damping action of shock absorber. The iron particles in the MR fluid opposes the carrier fluid passing through piston head holes .This resistance builds strong opposition for shock absorber oscillation.
Sacralization is a type of transitional abnormally observed at the lumbosacral junction. It invol... more Sacralization is a type of transitional abnormally observed at the lumbosacral junction. It involves fully bilateral fusion in between the fifth lumbar vertebra to first sacral vertebra (L5–S1 Transverse vertebra). Sacralization of the L5 vertebra is more commonly observed in people comparison to lumbarization of the first sacral vertebra segment, this can be present in human being from birth. The aim of the present work is to study the pressure distributions in sacralisation. For that cadaveric bones of sacralisation are used to measure geometrical data for modeling and to construct a better mesh representation for sacralization, the meshed model was analysed under compressive load to understand the load concentration on the sacralization. It is observed that the pressure distributions of the ventral lateral and dorsal-medial sides of sacrum are slight higher when compare to ventral and dorsal sides. This stresses were mostly concentrating at the sacral ala and the s1 pedicle regio...
IOP Conference Series: Materials Science and Engineering, 2018
The recent growing e-commerce needed for automated packaging system. We developed 3D packing syst... more The recent growing e-commerce needed for automated packaging system. We developed 3D packing system using prioritization method packing algorithm and Internet of things (IOT) for sending and receiving data. Here IOT connects between structures of the proposed Integrated Autonomous Packing Layer. IOT is a class of cyber network which link every used component to one another, gives flexibility of process and on-time data exchange. The consumer ordered product picked by '4Dof Articulate Arm Robot' place by priority method.The processed action dose packing according to the importance of respective, best example. Arm robot places the item in a bin, Back thought process is given to choose the object according to the significance. The manipulation of arm is simulated successfully by embedded C programing for respective action.
Journal of Long-Term Effects of Medical Implants, 2019
The objective of this finite-element analysis (FEA) study is to check the effect of stress on dif... more The objective of this finite-element analysis (FEA) study is to check the effect of stress on different types of threaded implants. To perform the FEA study of 81 models, the geometry of cancellous bone is imported and corresponding materials are set using FEA software. A common biting force is applied on the implant. After applying the load, each model is compared on the basis of equivalent von Mises stress. From the analysis, we observe that a trapezoidal type of thread profile is most suitable for dental implants.
Journal of Long-Term Effects of Medical Implants, 2019
The aim of using circular implants is to produce additional skin in healthy parts of the body, so... more The aim of using circular implants is to produce additional skin in healthy parts of the body, so that new skin that is produced may be used to aid in healing injured areas that occur with plastic surgery. This study shows the amount of additional skin that is produced over time from implants, corresponding to the amount of liquid that is inside the implant membrane. The authors perform the study first on implants alone and then we place implants under the skin. Results of the first step are in agreement with previously conducted research. Second-step results are the first of their kind, because to the best of our knowledge, no similar studies have been conducted, either experimentally or numerically. Our study is motivated by wavering and inconsistent results that are obtained during real-time surgical procedures.
Dental and Medical Problems, Mar 14, 2023
Mechanics of Advanced Materials and Structures, Sep 19, 2022
Materials
In order to reduce the loosening of dental implants, surface modification with hydroxyapatite (HA... more In order to reduce the loosening of dental implants, surface modification with hydroxyapatite (HA) coating has shown promising results. Therefore, in this present study, the sol-gel technique has been employed to form a tantalum and strontium ion-doped hybrid HA layer coating onto the titanium (Ti)-alloy substrate. In this study, the surface modification was completed by using 3% tantalum pent oxide (Ta2O5), 3% strontium (Sr), and a combination of 1.5% Ta2O5 and 1.5% Sr as additives, along with HA gel by spin coating technique. These additives played a prominent role in producing a porous structure layer coating and further cell growth. The MG63 cell culture assay results indicated that due to the incorporation of strontium ions along with tantalum embedded in HA, cell proliferation increased significantly after a 48 h study. Therefore, the present results, including microstructure, crystal structure, binding energy, and cell proliferation, showed that the additives 1.5% Ta2O5 and 1...
Mechanics of Advanced Materials and Structures
Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine
Titanium implants are commonly used in dental and other joint replacements and its several modifi... more Titanium implants are commonly used in dental and other joint replacements and its several modifications have been taken place to improve the adhesion between bone and implant. Different chemical and physical modifications are generally applied to the titanium surface for improving interlocking between bone and implant materials. The present work has been investigated the shear strength stiffness and stress concentration between Representative Volume Element (RVE) model and coating material while the surface of the RVE model modified with different types of surface textures. The surface topology parameters resulted a significant increase in shear strength by 55% and 45% for straight texture and U-shape texture, respectively compared with plain surface. The stiffness reduced significantly by 18% for U-shape and but to 36% only for X-shape, when compared with plain surface. The stress concentration factor in biaxial case both dome shape and X-shape has 45%and 25% in U-shape lower than...
Acta of Bioengineering and Biomechanics, 2021
Purpose: Recently, titanium (Ti) and its alloys have been widely used in dental and surgical impl... more Purpose: Recently, titanium (Ti) and its alloys have been widely used in dental and surgical implants in the last few decades. However, there is a loosening effect over a long period usage. Therefore, the present study aimed to increase life of an implant by its surface modification. Methods: In present study, sol-gel process has been applied to create tantalum pentoxide (Ta2O5) layer coating on Ti-substrate. In this technique, polyethylene glycol (PEG) plays an important role to form uniform porous coating, which can have potential application in formation of strong bonding to the natural bone. Results: Microstructural, elemental, structural and binding energy results showed that the material with 100% PEG-enhanced sol-gel Ta2O5 with spin coating onto Ti substrate followed by an optimized sintering temperature (500 °C) has better porous structure than that of 5% PEG-enhanced sol-gel Ta2O5 coating, and would be suitable for tissue in-growth properties. Conclusions: Therefore, it was...
IOP Conference Series: Materials Science and Engineering, 2020
Implants have created a great impact in the bio medical industry. There are different kinds of de... more Implants have created a great impact in the bio medical industry. There are different kinds of dental implants which are existing in the market. Every implant has a unique feature and withstands for different time period. This study on the dental implant creates a new model which includes the porous and tapered angle. Titanium alloy was used for making the implant and supporting bone tissue was considered. Computed tomography data were used to generate the mandible model. In the analysis both static and dynamic loading condition were considered. Three dimensional FEM was performed on the implant to find out the mechanical response for this specific type of implant. The von-Misses stress were calculated for implants and it was observed that safe when compared with yield strength of implant and abundant. In analysis it was also varied bone quality for cortical and cancellous bone and the effect of stress produced can be predated before the implantation done for the patients.
Journal of the Mechanical Behavior of Biomedical Materials, 2019
The Objective of this study is to look at stress patterns actuated by locator connections, when u... more The Objective of this study is to look at stress patterns actuated by locator connections, when used to hold mandibular overdentures retained by three and five dental Implants.Two 3D models were prepared to simulate mandibular Implant overdentures retained by three and five Implants. The geometric solid models were modelled in solid modelling software, the assembled models were converted into STEP format, and imported to ANSYS software for analysis. Three different vertical loads 50N, 100N and 150N were applied on the overdenture. Stresses were assessed at the areas of Implant and connection parts, Mucosa hidden overdentures, and cortical and cancellous bone adjoining the Implants.The results of this examination demonstrated that the Von Mises stresses produced by applying vertical load differed by the number of Implants used to retain the overdenture. It has been observed that maximum von misses stress induced in Implant complex and the stress induced in Mucosa layer was very low. Adaptability of the overdenture material assumed a noteworthy job in circulating the load stress and twisting of all basic structure. Stress induced in overdenture is higher in three-Implant when compared to five-Implant retained overdenture. The stresses induced in Overdenture in two models were investigated under different loading conditions, 5 different combinations of the bone quality and it was found that in all the cases the maximum stress has been concentrated in the implant
Applications and Techniques for Experimental Stress Analysis, 2020
The objective of project is to reduce the micromotion of novel implant under the static loads usi... more The objective of project is to reduce the micromotion of novel implant under the static loads using function of uniform design for FE analysis. Integrating the features of regular implant, a new implant model has been done. Micromotion of the novel implant was obtained using static structural FE analysis. Compared to the existing International team for implantology implants, the micromotion of the novel implant model was considerably decreased by static structural analysis. Six control factors were taken for achieving minimizes the micromotion of novel dental implant system. In the present work, uniform design technique was used to create a set of finite element analysis simulation: according to the uniform design method, all FE analysis simulation; compared to the original model, the micromotion is 0.01944mm and micromotion of improved design version is 0.01244mm. The improvement rate for the micromotion is 35.02%.
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Papers by Vamsi Krishna Dommeti