Cement extractor device in revision prosthesis of the humerus

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering

Background:

• Revision arthroplasty often involves challenging removal of residual cement from the medullary canal.
• Conventional methods carry risks including osteotomy, cortical perforation, fractures, and bone loss.
• Ultrasonic devices present thermal injury risks, particularly for the humerus and radial nerve.

Purpose of the Study:

• To evaluate the efficacy and safety of a novel mechanical cement extractor for humeral revision arthroplasty.
• To determine if a device designed for hip and knee revisions is suitable for shoulder procedures.

Main Methods:

• A new mechanical cement extractor was utilized in five cases of humeral revision arthroplasty.
• The device was employed to remove residual acrylic bone cement from the medullary canal.

Main Results:

• Complete and accurate removal of all residual cement was achieved in all five cases.
• The procedure was performed without any instances of bone loss or iatrogenic fractures.
• The mechanical extractor demonstrated successful application in the humerus, a site not originally intended for its use.

Conclusions:

• The novel mechanical cement extractor is a safe and effective tool for removing residual cement during humeral revision arthroplasty.
• This system, originally designed for hip and knee revisions, is also suitable for shoulder surgery.
• The device offers a promising alternative to conventional and ultrasonic methods, mitigating associated risks.