A plastic intermedullary plug for total hip arthroplasty

Area of Science:

• Orthopedic Surgery
• Biomaterials Engineering
• Medical Device Innovation

Background:

• Femoral component loosening is a common complication in total hip replacement (THR).
• Current methods for plugging the medullary canal, using cement or bone, have limitations including being time-consuming and ineffective.
• Improved cement fixation is crucial for long-term implant survival.

Purpose of the Study:

• To evaluate a novel high-density polyethylene (HDPE) plug for medullary canal plugging during THR.
• To assess the efficacy of the HDPE plug in enhancing cement fixation and preventing femoral component loosening.
• To determine the clinical feasibility, efficiency, and safety of the HDPE plug insertion technique.

Main Methods:

• Laboratory studies were conducted to assess the pressure generated by the HDPE plug during cementing.
• A prospective clinical study involving 50 patients undergoing THR was performed.
• The HDPE plug was inserted into the medullary canal prior to cement application.

Main Results:

• Laboratory tests demonstrated that the HDPE plug generates intramedullary pressure during cementing.
• Clinical results showed the HDPE plug effectively restricted the cement cone in the proximal femur in all 50 patients.
• The insertion method was found to be simple, efficient, and expedient in the clinical setting.

Conclusions:

• The high-density polyethylene plug is a convenient and effective material for plugging the medullary canal during THR.
• This technique significantly improves cement fixation and shows promise in preventing femoral component loosening.
• The HDPE plug offers a simple, efficient, and expedient alternative to existing methods for medullary canal management in THR.