Is locking compression plate the best modality of treatment for distal femur fractures?

Background: This observational study was conducted in order to study the functional efficacy of locking compression plate in distal femur fractures as they are one of the most common type of fractures with bimodal age distribution affecting younger age group as a consequence of high energy trauma especially road traffic accidents and elderly population due to osteoporosis.Methods: 40 Patients who are skeletally matured with acute distal femur fractures were radiologically assessed type of fractures, amount of comminution, articular congruence and quality of bone. pretested proforma which include age, sex, occupation, mode of injury, type of fracture, time interval between injury and surgery, associated comorbid conditions and other associated injuries.Results: Off the 40 patients under study 21 showed excellent outcome according to neers rating system and only 5 had fair results, 3 patients had superficial wound infection and 5 developed knee stiffness.Conclusions: Locking compression plate produces better results and appears to be good method of management in distal femur fractures

Experimental and finite element analysis of titanium based medial tibial condyle using incremental sheet metal forming

502-508Incremental Sheet Metal Forming (ISMF) is an innovative manufacturing technique for producing prototypes and manufacturing of complex shaped sheet metal parts. Manufacturing of implants and prosthesis for biomedical applications is a challenging task, because it demands the fabrication of complex intricate structures replicating the shapes of human body parts. An attempt has been made to clearly describe the capabilities and limitations of a new manufacturing technology to fabricate low cost, specific design medical implants. This study aims to fabricate an implant for medial tibial condyle using single point incremental forming and thereby improve the suitability of the single point incremental forming process. This investigation reports the fundamental knowledge on mechanical behavior of titanium grade 2 sheet metal to design and fabrication of knee implants with rigid hemispherical and roller ball forming tools by means of single point incremental forming process. Influence of major process parameters such as forming force, deformation of sheet, sheet thickness and profile accuracy of part have been identified by experimental work and Finite Element (FE) simulations. The result has shown that surface finish of the part formed by the roller ball forming tool is better than hemispherical rigid tool

Effect of process parameters on tensile strength and surface quality of PLA-ABS part produced by fused deposition modeling

300-310Fused Deposition Modeling (FDM) is an additive manufacturing technology to fabricate three-dimensional prototypes with complex geometries. The ultimate tensile strength and surface finish of the parts produced by FDM process are strongly related to the fabrication process parameters. So it is necessary to identify the optimal process parameters to improve the ultimate tensile strength and surface finish of the part. FDM process has been influenced by many process parameters and the process parameters such as raster angle, infill pattern and build orientation have been considered in this study to determine their influence on the response parameters such as ultimate tensile strength and surface roughness of Polylactic Acid (PLA)-Acrylonitrile Butadiene Styrene (ABS) blend. In this work, an experimental study has been validated using the response surface methodology and influence of the process parameters on response parameters has been analyzed using analysis of variance (ANOVA) method. Scanning Electron Microscope (SEM) images have been used to study the microstructure of the specimen at the fracture interface. The result has shown that infill pattern is the significant factor affecting the ultimate tensile strength. Surface roughness of the specimen has been found influenced by the build orientation followed by the infill pattern and raster angle

Experimental study on single point incremental forming of Inconel 718

The contemporary sheet metal industry employs forming methods that use a precise die and punch to form components with precise tolerances. In mass production, the high cost of manufacturing dies and punches is absorbed by the number of components formed, whereas this is not the case for low volume production where it increases the manufacturing cost of the products. To overcome the demand for the development of manufacturing technologies that are both agile and meet industrial requirements, an incremental sheet metal forming experiment was carried out on Inconel 718. The incremental sheet metal forming process in the research stage needs to be improved both in terms of accuracy and product quality. The main process parameters involved in the study are incremental depth, rotational speed, and feed rate of the forming tool. Based on the process parameters, experiments are conducted using the Taguchi L9 orthogonal array design and responses such as geometrical accuracy, surface roughness, and thinning are studied. The forming limit and micro-structural study allow us to understand the forming behavior of Inconel 718, which will enhance the applicability of the material.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author

Effect of process parameters on tensile strength and surface quality of PLA-ABS part produced by fused deposition modeling

Fused Deposition Modeling (FDM) is an additive manufacturing technology to fabricate three-dimensional prototypes with complex geometries. The low ultimate tensile strength and poor surface roughness of the produced part limits the engineering application of this technology. However, it is necessary to indentify the optimal process parameters to improve the ultimate tensile strength and surface roughness of the part. FDM process was influenced by many process parameters and the major process parameters such as raster angle, infill pattern and build orientation has been considered to study their influence on response parameters such as ultimate tensile strength and surface roughness of Polylactic acid (PLA)-Acrylonitrile butadiene styrene (ABS) blend. In this work, an experimental study was validated using response surface methodology and influence of the process parameters on response parameters were analyzed using analysis of variance (ANOVA). Scanning Electron Microscope (SEM) was used to study the microstructure of the specimen at the fracture interface. The result showed that infill pattern was the significant factor affecting the ultimate tensile strength. Surface roughness of the specimen was influenced by build orientation followed by infill pattern and raster angle