Developed Design for Humeral Head Replacement Using 3D Surface Mapping

Abstract

Assessment of dimensional and geometrical data on the humeral head replacement (HHR) objects is essential for solving the relevant designing problems in the physics of reverse engineering (RE). In this work, 2D-assessment for human humerus was performed using the computed tomography (CT) technique within the RE plan, after which the 2D images of humeral objects were converted into 3D images. The conversion was successful and indicated a clear difference in the 2D and 3D estimates of sizes and geometry of the humerus. The authors have analyzed and confirmed experimentally the statistical information on the relevant anatomical objects. The results of finite-element simulation of the compressive stresses affecting the geometry of 3D surface mapping were analyzed using SolidWorks software. For developing the biomechanical design of an HHR object suitable biomaterials were selected, and different metal-based biomaterials are discussed as applied at various loads. New methodology is presented for the size estimation of humeral head -both anatomical and artificial -in 3D-shape. A detailed interpretation is given for the results of CT D-measurements.

Experimental And Theoretical Validation Method For Estimation Of Straightness Deviation And Associated Uncertainty In Cnc-Cmm Measurement

“…This behavior is generally seen from a view point of the coverage interval versus Y 0 shown in Fig.5(d). Here we can see that at small Y 0 values the coverage interval is almost fixed near its optimized value calculated in equation(8). However, Fig.5(d)…”

“…Geometrical form accuracy of engineering surfaces plays an important role in modern industry using CNC-CMM, especially in geometrical shape measurement for automotive, airplane, reactors and aerospace technologies [4][5][6]. Implanted engineered biomaterial in-vitro or in-vivo of human is also needs more accurate surface to achieve high compatible in interface interact [7][8]. Straightness feature in coordinate metrology is a very necessary parameter in surface characterization, especially in straight line form and flatness measurements.…”

“…Indeed, this shows that the mathematical models have successfully recovered the zone of spatial straightness errors. From Fig.6(a) the endpoints for the coverage interval are (using MATLAB prctile functions) as follows: prctile (PDF f (), 97.5) = 0.0027 mm; prctile (PDF f (), 2.5) = 0.0005 mm These give rise to the uncertainty for the straightness distribution was shown in the following equation:Uncertainty = prctile (PDF f (), 97.5)prctile (PDF f (), 2.5) = 0.0022 mm(8)…”

Carbon Nanotube‐Based Reinforced Polymers for Medical Applications: Improving Impact Strength of Polymer‐Polymer Composites

“…In addition, the structure of individual polymeric composites consists of two separate components attempting to achieve several beneficial characteristics, such as reduced weight, improved mechanical and physical properties, and reasonable costs [10][11][12][13]. Moreover, they have the capability to fulfill certain dimensional and shape requirements for application areas with complex geometries, such as the orthopedic implants [14][15][16] and the design of biopsy needles [17,18]. Currently, around twenty types of synthetic polymeric biomaterials are available and used for a large variety of medical applications.…”