Custom Hip Stem Additive Prototyping Using Smart Materials

Abstract

<jats:p> Although a standardized hip joint prosthesis is a quick and easy solution to repair most diseases related to the hip joint, it never satisfies the patient s personal needs due to the uniqueness of the human anatomy. Femoral hip stem geometry is one of the factors that have an important impact on prosthesis lifespan or the revision surgery frequency that occurs due to postoperative complications, such as impingement or dislocation after THR (Total Hip Replacement). In this sense, the development of a custom hip stem prosthesis starting from a standardized femoral stem can bring benefits to the patient in time, being able to reduce the failure percentage of THR. The purpose of this article is the development of a custom prosthesis based on patient s CT (Computer Tomographic) scans in order to be 3D printed with biocompatible materials, being able to serve as a study model in both engineering and medicine. Also this study represents a first step in understanding how to apply the unique distribution of mechanical properties in human bone, in order to manufacture a hip prothesis that can mimic them. </jats:p>

Properties and Medical Applications of Biocompatible Polyamide in Additive Manufacturing

“…The volumetric mass densities of the samples according to the energy used in the sinterization process is depicted in the Figure 2. As it can be observed, the highest energy E1 lead to the highest volumetric mass density of the samples, around 0.85 g/cm 3 while the lowest energy E3 conducts to a much lower value, of about 0.65 g/cm 3 . Taking into consideration that all mechanical properties are directly connected with the structure and therefor with density, the energy providing the higher volumetric mass density is the one that leads to superior mechanical properties.…”

“…The polymeric materials can be used as bone substitutes while additive technologies allow constructing the appropriate shape and functional characteristics of a biological structure [1,2]. The custom implant and prosthesis are continuously developing due to additive manufacturing technologies which allows constructing mechanical parts that mimics the local anatomy of a patient starting directly form computer tomographic images [3,4]. Beside these the ready to use parts, the AM models successfully serves as disposable tools used in surgery or visualization elements for surgeons preoperative planning [5][6][7][8][9].…”

Computed tomography image analysis for Indonesian total hip arthroplasty designs

“…The study of the femoral stem is vital to appraise clinical success due to its compatibility within the proximal femur [4]. Nowadays, there is a wide range of hip implant designs differing in geometric features and configurations to closely mimic a patient's hip geometry [5], [6]. On the latest cutting-edge implant design technology, computed tomography scanning (CT-Scan) or magnetic resonance imaging (MRI) images  ISSN: 2088-8708 Int J Elec & Comp Eng, Vol.…”