Distal cement mantle thickness with a triangular distal centralizer inserted into the stem tip in cemented total hip arthroplasty

• Published in: The Journal of arthroplasty 2001-12, Vol.16 (8), p.998-1003
• Main Authors: Kawate, Kenji, Ohmura, Tetsuji, Nakajima, Hiroshi, Takakura, Yoshinori
• Format: Article
• Language: English
• Subjects: Adult; Aged; Aged, 80 and over; Arthroplasty, Replacement, Hip - instrumentation; Arthroplasty, Replacement, Hip - methods; cement mantle thickness; Cementation - methods; cemented total hip arthroplasty; distal centralizer; Female; Hip Joint - diagnostic imaging; Hip Prosthesis; Humans; Male; Middle Aged; Polymethyl Methacrylate; Prosthesis Design; Prosthesis Failure; Radiography; Retrospective Studies; Treatment Outcome; triangular centralizer
• ISSN: 0883-5403; 1532-8406
• DOI: 10.1054/arth.2001.26592

Fifty-seven hips undergoing a primary cemented total hip arthroplasty with use of a triangular distal centralizer inserted into the stem tip were investigated, with a special focus on distal cement mantle thickness. The subjects were 43 women and 3 men. When evaluated on conventional anteroposterior and lateral radiographs, the relative incidence of thin cement mantles in zones 3 or 5 owing to the distal centralizer was 15.8% (9 hips). Unsatisfactory findings were that the distal centralizer and distal part of the stem shifted to the cortex in 7 hips and bent or failed at the inserted site in 2 hips. There is risk of generating a thin cement mantle with use of the triangular centralizer and its insertion into the stem tip.