Wear debris from bipolar femoral neck-cup impingement

Messieh, Michael; Mattingly, D; Turner, Richard B.; Scott, Richard D.; Fox, John; Slater, James

doi:10.1016/0883-5403(94)90142-2

Cited by 38 publications

(13 citation statements)

References 4 publications

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“…Thus, at the extremes of movement, the neck impinges on the metal cup and not on the UHMWPE lining therefore reducing wear and debris formation 9. Neck cup impingement is a very important factor for the failure of bipolar prosthesis.…”

Section: Discussionmentioning

confidence: 99%

Bicentric bipolar hip prosthesis: A radiological study of movement at the interprosthetic joint

Kumar

Singh

Kumaraswamy

et al. 2011

IJOO

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Background:The bipolar hip prostheses after some time functions as a unipolar device. There is a need to change the design of bipolar hip prostheses to make it function as a bipolar device over a prolonged period of time. A bicentric bipolar hip prosthesis was used as an implant for various conditions of the hip. We evaluated the movement of this newly developed prosthesis at the interprosthetic joint radiologically at periodic intervals.Materials and Methods:Fifty two cases were operarted with the Bicentric bipolar prosthesis for indications like fracture neck of femur and various other diseases of the hip and were followed up with serial radiographs at periodic intervals to evaluate, what fraction of the total abduction at the hip was occurring at the interprosthetic joint.Results:In cases of intracapsular fracture neck of femur, the percentage of total abduction occurring at the interprosthetic joint at 3 months follow-up was 33.74% (mean value of all the patients), which fell to 25.66% at 1.5 years. In indications for bipolar hemireplacement other than fracture neck of femur, the percentage of total abduction occurring at the interprosthetic joint at 3 months follow-up was 71.71% (mean value) and at 1.5 years it was 67.52%.Conclusion:This study shows the relative preservation of inner bearing movement in the bipolar hip prosthesis with time probably due its refined design. Further refinements are needed to make the prosthesis work better in patients of intracapsular fracture neck femur.

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Section: Discussionmentioning

confidence: 99%

Bicentric bipolar hip prosthesis: A radiological study of movement at the interprosthetic joint

Kumar

Singh

Kumaraswamy

et al. 2011

IJOO

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“…The low mortality reported in the present series of 7.27% at 12 months is considerably less compared with 23% reported by D' Arcy and Devasis a reflection of the policy of patient selection and reasonable life expectancy of these patients[ 12 ]. We believe that pre-fracture mobility and an independent existence are more predictive of life expectancy than the patient age [ 4 ].…”

Section: Discussionmentioning

confidence: 99%

“…To tackle this problem the cup has been modified in staggering fashion and the neck of the prosthesis has been made trapezoidal like Charnley type neck (figure 3 ). This change in design has provided overall gross increase in the movement at the inner articulation and avoids the neck cup impingement, a very important cause for the failure of the bipolar prosthesis (figure 5 ) [ 4 ].…”

Section: Methodsmentioning

confidence: 99%

The BHU bicentric bipolar prosthesis in fracture neck femur in active elderly

Kumar

Agarwal

Singh

et al. 2008

J Trauma Manage Outcomes

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“…Visual and 3D assessments on poly retrieved components estimate that wear on the retentive rim of poly liners due to impingement [20,35] is challenging but seems to be related to IPD and loosening more so than articular surface wear [69]. D'Apuzzo et al [34] found damage on both bearings, with the inner HXLPE surface showing higher concentric wear patterns and lower prevalence of remaining machining lines and higher occurrence of embedded metal particles compared with the outer surface.…”

Section: Visual and 3-d Surface Analysismentioning

confidence: 99%

Wear of dual-mobility cups: a review article

Laura

Hothi

Battisti

et al. 2016

International Orthopaedics (SICOT)

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Dual-mobility (DM) cups have been clinically used in hip surgery in Europe for more than 35 years and continue to gain popularity worldwide due to promising results at reducing instability. Concerns related to polyethylene wear apply as in conventional standard bearings but are accentuated by the larger-diameter articulations with multiple surfaces. We critically reviewed the reported literature regarding the in vivo and in vitro wear occurring on all surfaces involved. We looked for patterns to create a rational classification of sites of wear and to identify areas for future research. Wear was a significant problem for first-generation designs and appeared to be design related. Improved polyethylene, thinner and smoother trunnions, chamfered rims and eccentric configuration of insert and shell seem to enhance outcome performance; however, long-term clinical evidence and retrieval studies are needed to better understand the balance of benefit and risk when opting for DM bearings.

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Wear debris from bipolar femoral neck-cup impingement

Cited by 38 publications

References 4 publications

Bicentric bipolar hip prosthesis: A radiological study of movement at the interprosthetic joint

Bicentric bipolar hip prosthesis: A radiological study of movement at the interprosthetic joint

The BHU bicentric bipolar prosthesis in fracture neck femur in active elderly

Wear of dual-mobility cups: a review article

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