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<p>Surface roughness critically influences biocompatibility, wear resistance, and clinical success of medical implants. This study quantitatively evaluates the nano-topography of a Bipolar Hip Joint—a key prosthetic implant used in hip replacement surgeries—using stylus profilometry (Mitutoyo CS-5000 CNC; contact method) and optical profilometry (Wyko NT9800; non-contact method). Comparative analysis revealed a significant methodological&#xa0;divergence in average roughness (Ra) values: 89.32&#xa0;nm (stylus) versus 67.20&#xa0;nm (optical). This variation underscores fundamental differences in spatial resolution and measurement principles between contact and non-contact techniques. This study established that surface characterization methodology critically influences roughness quantification of orthopedic implants with optical profilometry, demonstrating superior reliability for nano-scale characterization. Both methods independently confirmed that Bipolar Hip Joint&#xa0;possesses a smooth surface, with Ra values conforming to the acceptable range established by Albrektsson and Wennerberg.</p>

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Surface Roughness Characterization of Bipolar Hip Joint Using Stylus and Optical Profilers: A Comparative Study

  • 期刊论文

  • 发表日期：

    2026年4月9日

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  • Mayank Mathur,
  • Sandeep Kumar,
  • Nitin Paliwal,
  • Kuldeep Kumar,
  • Meher Wan,
  • Mukesh Jewariya

摘要

Surface roughness critically influences biocompatibility, wear resistance, and clinical success of medical implants. This study quantitatively evaluates the nano-topography of a Bipolar Hip Joint—a key prosthetic implant used in hip replacement surgeries—using stylus profilometry (Mitutoyo CS-5000 CNC; contact method) and optical profilometry (Wyko NT9800; non-contact method). Comparative analysis revealed a significant methodological divergence in average roughness (Ra) values: 89.32 nm (stylus) versus 67.20 nm (optical). This variation underscores fundamental differences in spatial resolution and measurement principles between contact and non-contact techniques. This study established that surface characterization methodology critically influences roughness quantification of orthopedic implants with optical profilometry, demonstrating superior reliability for nano-scale characterization. Both methods independently confirmed that Bipolar Hip Joint possesses a smooth surface, with Ra values conforming to the acceptable range established by Albrektsson and Wennerberg.