No Consensus for Femoral Head Impaction Technique in Surgeon Education Materials From Orthopedic Implant Manufacturers

• Published in: The Journal of arthroplasty 2018-06, Vol.33 (6), p.1749-1751.e1
• Main Authors: McGrory, Brian J., Ng, Eric
• Format: Article
• Language: English
• Subjects: Arthroplasty, Replacement, Hip - education; Arthroplasty, Replacement, Hip - methods; Arthroplasty, Replacement, Hip - standards; Corrosion; failure; Femur - surgery; Femur Head - surgery; Hip Prosthesis; Humans; impaction; Prosthesis Design; Surgeons - education; surgical technique; total hip arthroplasty; trunnion
• ISSN: 0883-5403; 1532-8406
• DOI: 10.1016/j.arth.2017.12.036

Prior studies indicate that one factor that may contribute to total hip arthroplasty failure due to mechanically assisted crevice corrosion at the femoral head-trunnion junction is the method of femoral head fixation. Up-to-date on-line surgical technique guides describing fixation of the prosthetic femoral head of common implants of the 4 largest manufacturers as well as 2 minor manufacturers were identified. The information given regarding preparation and fixation of the femoral head was evaluated and compared. A total of 24 surgical technique guides were evaluated. Most guides (22/24) addressed fixation technique; of these, 19 of 22 suggested cleaning and 20 of 22 suggested drying the trunnion prior to affixing the femoral head. The manner of fixation, however, varied widely and there was no single technique advocated. The majority of surgeon education materials do not specify a single technique for assembly of the head femoral component in total hip arthroplasty. If the method of fixation is indeed important, efforts should be made to identify the best technique, and improve and unify the surgical technique instructions.