Cementation of an acetabular liner into a well-fixed acetabular shell during revision total hip arthroplasty

Background Highly cross-linked polyethylene in total hip arthroplasty (THA) has been shown to decrease wear rate compared with a conventional polyethylene liner. However, it has also been reported that the manufacturing processes can cause early failure of the implant. Case We describe early catastrophic failure at <4 years following primary THA surgery of a PINNACLE MARATHON® polyethylene acetabular liner resulting from a malaligned PINNACLE DUOFIX HA® acetabular shell with resultant point loading. Radiographs revealed a malaligned acetabular shell and superior subluxation of the femoral head out of the liner. At revision surgery operative findings revealed that the acetabular shell alignment was in of 50° of anteversion and 70° of inclination. Significant metallosis in the surrounding tissues was observed. Conclusions We conclude that a malpositioned acetabular shell resulting in point loading and abnormal contact stresses was the mechanism of failure. Our case highlights the importance of achieving correct acetabular component alignment in total hip arthroplasty.

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Revision total hip arthroplasty using acetabular reconstruction cage

10.26226/morressier.579f68edd462b80290b4cd95 ◽

2016 ◽

Author(s):

Afshin Taheriazam

Keyword(s):

Total Hip Arthroplasty ◽

Hip Arthroplasty ◽

Acetabular Reconstruction ◽

Revision Total Hip Arthroplasty ◽

Total Hip

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Clinical, functional and radiographic outcomes after revision total hip arthroplasty with tapered fluted modular or non-modular stems: a systematic review

Hip International ◽

10.1177/11207000211004383 ◽

2021 ◽

pp. 112070002110043

Author(s):

Antonios A Koutalos ◽

Sokratis Varitimidis ◽

Konstantinos N Malizos ◽

Theofilos Karachalios

Keyword(s):

Total Hip Arthroplasty ◽

Hip Arthroplasty ◽

Revision Rate ◽

Clinical Results ◽

Fracture Rate ◽

Revision Total Hip Arthroplasty ◽

Term Survival ◽

Total Hip ◽

Radiographic Outcomes

Purpose: The aim of the study was to systematically evaluate clinical outcomes of tapered fluted stems, either monoblock or modular, in revision total hip arthroplasty. Methods: PubMed, EMBASE and Web of Science and Cochrane databases were systematically searched by 2 researchers. Clinical studies reporting primarily on survival and re-revision rates, and secondarily on subsidence, dislocation, intraoperative fractures, periprosthetic fractures and infection were included. 2 investigators assessed the quality of the studies. Results: 46 studies were included in this review, reporting on 4601 stem revisions. The pooled re-revision rate was 5.1% and long-term survival ranged from 75% to 98.5%. No differences were observed between monoblock and modular stems regarding re-revision rate, dislocation rate, periprosthetic fracture rate or infection rates. Monoblock stems exhibited more subsidence and modular stems displayed more intraoperative fractures. Conclusions: Satisfactory results can be obtained with the use of tapered fluted end-bearing stems. Monoblock stems offer the same clinical results as modular stems.

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