scholarly journals Modal Analysis of Femur Bone to Find out the Modal Frequencies of Different Bone Implant Materials

2020 ◽  
Vol 8 (4S) ◽  
pp. 65-69
Keyword(s):  
Modal Analysis ◽  
Daily Activity ◽  
Bone Implants ◽  
Femur Head ◽  
Stainless Steel 316L ◽  
Bone Implant ◽  
Natural Bone ◽  
Human Femur ◽  
Femur Bone ◽  
Modeling Analysis

Bio-mechanics is most difficult to carry out on the bone due to the modeling difficulty and complex forces acting on the bones. In this study, we consider human femur bone for modeling analysis. The modal analysis is also important as that of static analysis. We can predict the place at which the fracture occurs. The modal analysis for three different materials is carried out to find the feasible material for bone implants. These materials are Natural bone, AZ31, and Stainless steel 316L. The daily activity such as walking is used as a boundary condition in our study. The femur head is fixed and 750N load is applied at the Knee joint. The results are obtained for these materials. The modal frequencies for Natural Femur bone vary from 0.328Hz to 2.258Hz for Mode1 to Mode 10. The modal frequencies for AZ31 vary from 1.502Hz to 10.292 Hz for Mode1 to Mode 10. The modal frequencies for 316L vary from 3.120Hz to 21.150 Hz for Mode1 to Mode 10. These frequencies are minimal as compared to the natural frequency of the Femur bone. AZ31 is best suited for the fabrication of bone implants because of its lightweight in comparison with 316L material. Also, this is biodegradable in the human body over the period.

scholarly journals Modeling, analysis and simulation of the human femur: prosthesis of femur head

PAMM ◽  
2007 ◽  
Vol 7 (1) ◽  
pp. 2090023-2090024
Author(s):  
Orlando Martín Hernández Bracamonte ◽  
José Manuel Olivencia Quiñones
Keyword(s):  
Femur Head ◽  
Human Femur ◽  
Modeling Analysis

scholarly journals Effect of Osteoporosis on Well-Integrated Bone Implants

2021 ◽  
Vol 11 (2) ◽  
pp. 723
Author(s):  
Amani M. Basudan ◽  
Marwa Y. Shaheen ◽  
Abdurahman A. Niazy ◽  
Jeroen J.J.P. van den Beucken ◽  
John A. Jansen ◽  
...  
Keyword(s):  
Dental Implants ◽  
Femoral Condyle ◽  
Bone Implants ◽  
Bone Implant ◽  
Ovx Rats ◽  
Bone Response ◽  
Significant Difference ◽  
Female Wistar Rats ◽  
Edentulous Patients

The installation of dental implants has become a common treatment for edentulous patients. However, concern exists about the influence of osteoporosis on the final implant success. This study evaluated whether an ovariectomy (OVX)-induced osteoporotic condition, induced eight weeks postimplantation in a rat femoral condyle, influences the bone response to already-integrated implants. The implants were inserted in the femoral condyle of 16 female Wistar rats. Eight weeks postimplantation, rats were randomly ovariectomized (OVX) or sham-operated (SHAM). Fourteen weeks later, animals were sacrificed, and implants were used for histological and histomorphometric analyses. A significant reduction in the quantity and quality of trabecular bone around dental implants existed in OVX rats in comparison to the SHAM group. For histomorphometric analysis, the bone area (BA%) showed a significant difference between OVX (34.2 ± 4.3) and SHAM (52.6 ± 12.7) groups (p < 0.05). Bone–implant contact (BIC%) revealed significantly lower values for all implants in OVX (42.5 ± 20.4) versus SHAM (59.0 ± 19.0) rats. Therefore, induction of an osteoporotic condition eight weeks postimplantation in a rat model negatively affects the amount of bone present in close vicinity to bone implants.

scholarly journals Prediction of stress shielding around implant screws induced by three-point and four-point bending

2019 ◽  
Vol 15 (4) ◽  
pp. 548-554
Author(s):  
Izzawati Basirom ◽  
Mohd Afendi Rojan ◽  
Mohd Shukry Abdul Majid ◽  
Nor Alia Md Zain ◽  
Mohd Yazid Bajuri
Keyword(s):  
Strain Energy ◽  
Stress Shielding ◽  
Lateral Impact ◽  
Bone Implant ◽  
Femur Bone ◽  
Four Point Bending ◽  
Biomechanical Compatibility ◽  
Bending Load ◽  
Fracture Area ◽  
Bending Behavior

Implant screws failure commonly occurs due to the load that constantly generated by the patient’s body to the fracture area. Bending load is often encountered in femur bone due to lateral impact which affected the bone and also the implants installed. Consequently, the load will lead to the failure of implants that can cause loosening or tightening of implants. Henceforth, in this manner, it is significant to study the bending behavior of bone implant in femur bone. The aim of this study was to analyze the stress shielding of bone implant on the internal fixator. 3D technique is able to show the overall deformation and stress distribution. The lower the biomechanical compatibility, the lower the STP value obtained. In addition, the variation of elastic modulus (E) of the screws materials, 200GPa (Stainless Steel) and 113.8GPa (Titanium) resulted in the increase of the total stress transferred (STP) between screw and bone interface. In this work, strain energy density (SED) was determined as a good indicator of stress shielding.

scholarly journals Effect of cancellous bone on the stress distribution in the proximal human femur(Bone Mechanics)

2004 ◽  
Vol 2004.1 (0) ◽  
pp. 39-40
Author(s):  
Hiroki Nakatsuchi ◽  
Naoyuki Watanabe ◽  
Yukio Nakatsuchi ◽  
Masahiro Kusakabe ◽  
Shigeru Tadano ◽  
...  
Keyword(s):  
Stress Distribution ◽  
Cancellous Bone ◽  
Bone Mechanics ◽  
Human Femur ◽  
Femur Bone

Lectinhistochemistry Evaluation of Bone after Implantation with Macroporous Titanium Samples

2012 ◽  
Vol 77 ◽  
pp. 190-195 ◽  
Author(s):  
Kalan Bastos Violin ◽  
Tamiye Simone Goia ◽  
José Carlos Bressiani ◽  
Ana Helena de Almeida Bressiani
Keyword(s):  
Healing Process ◽  
High Vacuum ◽  
High Specificity ◽  
Membrane Glycoproteins ◽  
Bone Implant ◽  
Femur Bone ◽  
Shape Processing ◽  
Near Net Shape ◽  
13Zr Alloy ◽  
Molecular Evaluation

Titanium and its alloys are widely used as biomaterials and interact well with bone tissue. In order, to evaluate more than just morphological osseointegration by histological slides the work aimed to approach a molecular evaluation of bone-implant using lectinhistochemistry (LHC), which binds with high specificity carbohydrates (sugar residues) presents in membrane glycoproteins with the use of lectins. The implanted samples were obtained by powder metallurgy, Ti-13Nb-13Zr alloy with and without gelatin. Pores were achieved by adding gellatin 5 wt% to the hydrogenated metallic powder, after near net shape processing, the samples were thermal treated in vacuum (300 °C/90min) and sintered in high-vacuum (1150 °C/14h). The samples were characterized for porosity (~30%), and subsequently were implanted in rat’s femur bone. After 4 weeks of healing process, bone with implant were sampled to perform LHC in paraffin embedded tissue in histological slides using the lectins PNA, UEA-1, WGA, sWGA and RCA-1. All samples osseointegrated well with the bone, no fibrous capsule was present in the bone which was in contact with the implant. With the molecular approach of osseointegration, adjustments in the processing and structure of macroporous titanium based implants can be performed to achieve friendly structure.

Vibrational Characteristics and Stress Analysis in a Human Femur Bone

2017 ◽  
Vol 4 (9) ◽  
pp. 10084-10087 ◽  
Author(s):  
Priyadarshi Biplab Kumar ◽  
Dayal R. Parhi
Keyword(s):  
Stress Analysis ◽  
Human Femur ◽  
Femur Bone ◽  
Vibrational Characteristics

Stainless Steel 316 L Metal Coating with Capiz Shell Hydroxyapatite Using Electrophoretic Deposition Method as Bone Implant Candidate

2020 ◽  
Vol 840 ◽  
pp. 336-344
Author(s):  
Martinus Kriswanto ◽  
Muhammad Khairurrijal ◽  
Dave Leonard Junior Wajong ◽  
Tofan Maliki Kadarismanto ◽  
Yusril Yusuf
Keyword(s):  
Stainless Steel ◽  
Electrophoretic Deposition ◽  
Sintering Temperature ◽  
Deposition Method ◽  
Stainless Steel 316L ◽  
Bone Implant ◽  
X Ray ◽  
Withdrawal Speed ◽  
Stainless Steel 316 ◽  
Scanning Electron

Hydroxyapatite (HAp) made of capiz shell has been successfully coated onto stainless steel 316L substrate using electrophoretic deposition (EPD) method. In this study, three variations were applied, they were the voltages of 25 V and 50 V, the withdrawal speeds of 0.1 mm/s, 0.5 mm/s, and 1 mm/s, and the sintering temperatures of 750, 850, and 950 °C. These variations were applied to determine the differences in morphology and crystal structure of the layers so that the most suitable result was obtained as a candidate for the bone implant. Characterization was done by Scanning Electron Microscope and X-Ray Diffractometer. The EPD process and the application of sintering temperature eliminated the phase of B type apatite carbonate which made the purity of the HAp layer higher. The SEM results show that the layer was more homogeneous and free of cracking at a voltage of 50 V and the withdrawal speed of 0.1 mm/s. The layer density was higher as the voltage and sintering temperature increased. Higher sintering temperature also made the layer more homogeneous, but at 950 °C, stainless steel 316L substrate underwent a phase transformation which caused the decreasing of the purity of the HAp layer. The best results were obtained by applying a50 V voltage, a withdrawal speed of 0.1 mm/s, and a sintering temperature of 850 °C.

Improved Prosthetic Bone Implants

2003 ◽  
Author(s):  
Bhavin V. Mehta ◽  
Robert J. Setlock
Keyword(s):  
Structural Properties ◽  
Weight Distribution ◽  
Material Selection ◽  
Patient Comfort ◽  
Scaffold Material ◽  
Improved Method ◽  
Bone Implants ◽  
Biodegradable Scaffold ◽  
Natural Bone ◽  
Scaffold Materials

An improved method for manufacturing prosthetic bones is examined. We are developing a new improved method for designing and manufacturing prosthetic bones that have a porous interior core covered by a solid outer shell, more closely matching the morphology of natural bone. The new method is compatible with a wide variety of materials, including polymers, metals, composites, and biodegradable scaffold materials. Use of biodegradable scaffold material holds the potential for eventual bone regeneration within and throughout the prosthesis. Regardless of the material selection, this improved type of prosthesis is expected to more closely mimic the overall material and structural properties of natural bone, including shape, strength, weight, and weight distribution. By fabricating prosthetic bones that duplicate the material and structural properties of natural bone, implants could be made to operate as precision replacements, feeling and functioning exactly like natural bone. In addition to improving patient comfort, these new prostheses are expected to reduce the occurrence of unnatural secondary wear patterns caused by current style prosthetic bones that function in unnatural fashions due to their non-matching material and structural properties.

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