Total hip arthroplasty (THA) is an orthopedic surgery to solve hip disorders. During placement to the patient, THA, which consists of the hip stem and acetabular components, must follow the morphological profile of the patient. Plenty of studies have described the importance of patient-specific implant (PSI) for THA, both of how to design and implement it, but no one published how to adjust the attached installation tools. The THA installation tools are a femoral broach for installing the hip stem and an acetabular reamer for installing acetabular components. To the best of our knowledge, this is the first study that develops the THA installation tools, consisting of a femoral broach and acetabular reamer, that follow the hip and femur bone’s patient profiles. First, the designed patient-specific installation tools of the femoral broach and acetabular reamer are computed using finite element analysis (FEA) to understand the biomechanical responses when it is applied. Second, through self-design experimental testing using a 3D print prototype, compatibility between all components is analyzed. From FEA, the maximum Von Mises Stress (VMS) in the femoral broach is 76.206 MPa and the acetabular reamer reached 150.7 MPa, which both are lower than the SS316L yield strength value 170–300 MPa and indicates the designed femoral broach and acetabular reamer are safe to be manufactured. Our experimental tests show compatibility between all components while broaching and reaming. The successful design and experimental studies of THA installation tools could significantly help industries, particularly in low-income countries, to independently manufacture medical devices.

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Biomechanical Simulation and Experimental Study for Total Hip Arthroplasty Placement Tools: Femoral Broach and Acetabular Reamer

  • Dita A. Mayasari,
  • Nonik S. Ayati,
  • Nisa R. Amitasari,
  • Talitha Asmaria,
  • Menik Dwi Kurniatie,
  • Joko Triwardono,
  • Muhammad S. Utomo

摘要

Total hip arthroplasty (THA) is an orthopedic surgery to solve hip disorders. During placement to the patient, THA, which consists of the hip stem and acetabular components, must follow the morphological profile of the patient. Plenty of studies have described the importance of patient-specific implant (PSI) for THA, both of how to design and implement it, but no one published how to adjust the attached installation tools. The THA installation tools are a femoral broach for installing the hip stem and an acetabular reamer for installing acetabular components. To the best of our knowledge, this is the first study that develops the THA installation tools, consisting of a femoral broach and acetabular reamer, that follow the hip and femur bone’s patient profiles. First, the designed patient-specific installation tools of the femoral broach and acetabular reamer are computed using finite element analysis (FEA) to understand the biomechanical responses when it is applied. Second, through self-design experimental testing using a 3D print prototype, compatibility between all components is analyzed. From FEA, the maximum Von Mises Stress (VMS) in the femoral broach is 76.206 MPa and the acetabular reamer reached 150.7 MPa, which both are lower than the SS316L yield strength value 170–300 MPa and indicates the designed femoral broach and acetabular reamer are safe to be manufactured. Our experimental tests show compatibility between all components while broaching and reaming. The successful design and experimental studies of THA installation tools could significantly help industries, particularly in low-income countries, to independently manufacture medical devices.