Migration of the Duraloc cup after 5 years

Stihsen, Christoph; Pabinger, Christof; Radl, Roman; Rehak, Peter; Windhager, Reinhard

doi:10.1007/s00264-007-0405-y

Cited by 13 publications

(11 citation statements)

References 25 publications

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“…In our study, larger cups (≥ 54 mm) showed 200% greater migration than did smaller cup sizes (< 54 mm). With our results at 24 months we can confirm the findings of Stihsen et al for the Duraloc cup ‘100 Series’ (DePuy Synthes, Warsaw, IN, USA), who also found a significantly higher migration for cups ≥ 54 mm [ 16 ]. Stihsen et al already suspected that the soft bone surrounding the larger cup provides a larger surface for movement, which may lead to increased migration [ 16 ].…”

Section: Discussionsupporting

confidence: 91%

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Two-year radiologic assessment of the Pinnacle cup—a migration analysis with EBRA

Dammerer

Ruzicka

Blum

et al. 2020

Arch Orthop Trauma Surg

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Introduction The most common cause of failure in total hip arthroplasty (THA) is aseptic loosening. Uncemented cup migration analysis by EBRA (Einzel-Bild-Roentgen-Analyse) has shown to be a good predictive indicator for early implant failure if the cup migrates more than 1 milimeter (mm) within the first 2 years after surgery. In this study, we investigated the migration behaviour of an uncemented press-fit cup after 2 years follow-up. Materials and methods Applying a retrospective study design, we reviewed all consecutive patients who received an uncemented press-fit cup at our Department between 2013 and 2018. A total of 484 patients were identified. We reviewed medical histories and performed radiological measurements using EBRA-Cup software. EBRA measurements and statistical investigations were performed by two independent investigators. Results A total of 165 cups in 159 patients (female: 90; male: 69) met our inclusion criteria. Mean age at surgery was 66.7 (range 18.4–90.5) years. EBRA migration analysis showed a mean total migration of 0.7 mm (range 0.0–6.3) over our follow-up period of 2 years. Of the investigated cups, 53.2% showed less than 1 mm migration in the investigated follow-up period. Conclusion In conclusion, the Pinnacle cup used in our study provides low mean migration at final follow-up. Based on the assumption of secondary stabilization, good long-term outcome of the Pinnacle cup can be expected. Trial registration number and date of registration Number: 20181024-1875; Date: 2018-09-20

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Section: Discussionsupporting

confidence: 91%

“…In addition, the radiographs were checked for radiolucencies according to Delee/Charnley classification [ 15 ]. As recommended [ 16 , 17 ], we divided the patient cohort into two groups to assess the effect of cup size: patients with a cup size < 54 mm and patients with a cup size ≥ 54 mm.…”

Section: Methodsmentioning

confidence: 99%

Two-year radiologic assessment of the Pinnacle cup—a migration analysis with EBRA

Dammerer

Ruzicka

Blum

et al. 2020

Arch Orthop Trauma Surg

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“…Minor migration is usually asymptomatic (11). A mean cup migration at 2 years >2 mm correlates significantly with loosening (12) however delayed cup stabilisation is a well-recognised phenomenon (13). The migration observed in our study over 5 years was 1.5 mm with the rate of migration diminishing during the duration of the study.…”

Section: Discussionmentioning

confidence: 99%

The RM Pressfit Vitamys: 5-Year Swiss Experience of the First 100 Cups

et al. 2017

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ORIGINAL ReseARch ARTIcLemonoblock designs may be cheaper than their modular counterparts. Despite this, monoblock cups are not used as commonly as modular designs possibly because of concerns over adequate seating and positioning (2). Regardless of modularity, the overall survival of uncemented cups, however, depends on primary and secondary stability plus wear resistance.The RM Pressfit vitamys cup (Mathys Ltd.) is a titaniumcoated, vitamin E stabilised, highly cross-linked polyethylene monoblock cup. It achieves primary stability by equatorial press-fit and secondary stability by bony on-growth to the titanium coating (Fig. 1). This coating in itself conveys no structural stiffness which allows the cup to remain isoelastic compared to bone. The cup can accept supplemental screw fixation which potentially improves initial stabilisation in unexpectedly osteopaenic bone or acetabulae with wall deficiencies. The RM Pressfit vitamys (Fig. 2) is the evolution of the RM classic cup which has shown survivorship of 94% at 20 years for aseptic loosening (3). Osteolysis is seldom encountered if the annual wear rate is less than 0.1 mm/year (4). Secondary benefits of this design are the use of larger femoral head sizes to diminish instability -the commonest cause of early revision (1).

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“…With the exception of early radiographic outcome data from a single institution [39], the Duraloc 1 100 cup has consistently demonstrated excellent fixation. Including the data from our study and three other clinical outcome series with 5-to 10-year followup, only one case of aseptic loosening has been reported among more than 700 Duraloc 1 100 cups [2,36,38]. In our study, the absence of cup loosening, despite a 31% (57 of 185) incidence of pelvis osteolysis, may be explained by a previous finding that the surface area of the cup occupied by osteolysis plateaued at 40% despite progressively increasing lesions sizes [8].…”

Section: Discussionmentioning

confidence: 82%