Intra-operative implantation errors during hemiarthroplasty

Area of Science:

• Orthopedic Surgery
• Biomaterials Engineering

Background:

• Hemiarthroplasty using the Austin Moore endoprosthesis is a standard treatment for displaced intracapsular femoral neck fractures in elderly patients (>60 years).
• Technical errors during the implantation of uncemented Austin Moore prostheses are frequent and can lead to complications, including early prosthetic failure and the need for revision surgery.

Purpose of the Study:

• To determine the frequency of technical errors encountered by surgeons during the implantation of uncemented Austin Moore endoprostheses.
• To identify common intraoperative errors to improve surgical technique and reduce early prosthetic failure.

Main Methods:

• A 5-year retrospective analysis of patient radiographs was conducted.
• The study focused on hemiarthroplasty cases using uncemented Austin Moore endoprostheses at NKST Rehabilitation Hospital, Mkar, Nigeria.
• Intraoperative errors associated with early prosthetic failure were analyzed using SPSS version 21.

Main Results:

• Out of 48 patients, 35 met the study criteria.
• Sixteen patients (45.7%) experienced 25 intraoperative implantation errors.
• The most common errors included inadequate neck remnant length (37.1%), inadequate calcar seating (8.6%), incorrect prosthetic head size (5.7%), and periprosthetic fracture (5.7%).

Conclusions:

• Hemiarthroplasty is a technically challenging procedure with a high incidence of intraoperative implantation errors.
• Thorough pre-operative planning, careful patient selection, and comprehensive surgeon training are crucial.
• Attention to detail during surgery can minimize technical errors and subsequent early prosthetic failure.