Early Follow-up for a Hybrid Total Hip Arthroplasty Using a Metal-Backed Acetabular Component Designed to Reduce “Backside” Polyethylene Wear

Poole, Colin E.; Patil, Shantanu; D’Lima, Darryl D.; Colwell, Clifford W.

doi:10.1007/s11420-005-0102-6

Cited by 5 publications

(4 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Alternatively, the volumetric wear rates can be calculated by considering the volume loss after the bedding-in stage, when creep has been stabilized [4]. In clinical studies, the creep is normally suggested to occur in the post-operative first year and the linear head penetration at 1 year can be subtracted from the total penetration at subsequent follow-ups to determine a true wear rate [5].…”

Section: Introductionmentioning

confidence: 99%

Wear simulation of ultra-high molecular weight polyethylene hip implants by incorporating the effects of cross-shear and contact pressure

Kang

Brown

et al. 2008

Proc Inst Mech Eng H

View full text Add to dashboard Cite

The effect of multi-directional cross-shear (CS) motion and contact pressure on ultra-high molecular weight polyethylene (UHMWPE) wear was investigated in this study, based on an integrated experimental and computational approach. The wear factor as a function of CS was determined experimentally from a multi-directional pin-on-plate wear tester under a nominal contact pressure of 1 MPa. A computational wear model was developed which included the effects of CS as well as the load and sliding distance imposed on the hip joint employing a UHMWPE cup against a metallic femoral head under both gait and Leeds ProSim hip joint simulator conditions. The CS ratios were quantified over the articular surface of the UHMWPE cup and the CS-dependent wear factors derived from multi-directional pin-on-plate studies were applied in the computational wear model. Outputs from the computational wear model were validated independently against an experimental hip simulator study. Comparisons of linear and volumetric wear were made between the computational wear model and the hip simulator testing for a nominal conventional (0 MRad) UHMWPE cup of 28mm diameter and a highly cross-linked (10 MRad) UHMWPE cup. The difference between the computed and experimental volumetric wear was approximately 30 per cent for the 0 MRad UHMWPE, although the worn areas between the prediction and the measurement were similar. For the 10 MRad UHMWPE, the discrepancy was reduced to 16 per cent. In both cases, the computational model predicted a lower wear rate than the experimental simulator testing. The effect of using alternative wear factors under a different nominal contact pressure of 3MPa was also considered. The input wear factor to the computational model, derived from a constant loaded pin-on-plate test configuration, may underestimate the dynamic effect due to the variation in the load in the hip joint simulator.

show abstract

Section: Introductionmentioning

confidence: 99%

Wear simulation of ultra-high molecular weight polyethylene hip implants by incorporating the effects of cross-shear and contact pressure

Kang

Brown

et al. 2008

Proc Inst Mech Eng H

View full text Add to dashboard Cite

show abstract

“…Despite the mostly favorable clinical outcome at early and mid-term follow-up, some authors express concern regarding the high rate of PE wear, reported at 60-100% [12,13,[16][17][18]. The primary suspected reason for excessive PE wear inducing osteolysis, especially at the acetabular site, is the friction pair and associated occurrence of debris [19][20][21][22]. Concomitantly, there is an international consensus that aseptic osteolysis is a cell-mediated process driven by the presence of wear debris particles [21].…”

Section: Introductionmentioning

confidence: 99%

“…The primary suspected reason for excessive PE wear inducing osteolysis, especially at the acetabular site, is the friction pair and associated occurrence of debris [19–22]. Concomitantly, there is an international consensus that aseptic osteolysis is a cell-mediated process driven by the presence of wear debris particles [21].…”

Section: Introductionmentioning

confidence: 99%

Early Polyethylene Wear and Excessive Acetabular Granuloma in an Uncemented HA-Coated Total Hip Arthroplasty—Midterm Results of a Prospective Study

Ohnsorge

Davis

Maus

et al. 2006

HSS Journal®: The Musculoskeletal Journal of Hospital for Speci

View full text Add to dashboard Cite

This is a prospective review of 135 HAcoated ABG I total hip arthroplasty (THA) systems with a mean clinical and radiographic follow-up of 8.5 years. The 5-year survival rate was 85%, but 22% of the patients were dissatisfied. Revision THA was already indicated in 28% of the patients, with 26% indicated for cup loosening. PE wear was detected by x-ray in 42%. Disproportionate substantial wear with an average linear loss of 2.6 mm at the inner rim of the insert was observed in 23% of the cases. The mean annual wear rate was calculated 0.1-0.25 mm/year. Laboratory examination of the retrieved PE revealed polishing, cracks, and subsurface delamination. Radiographic evidence of acetabular cysts were found to be excessive granuloma during surgery. Polarization microscopy revealed debris particles phagocytized by reticuloendothelial cells. Results confirm the general opinion that aseptic osteolysis is a cell-mediated process driven by the presence of particles generated from wear debris. The findings also suggest that the main reasons for the failure of the first-generation ABG hip system were an insufficient locking mechanism and poor PE congruency, and not solely poor PE quality.

show abstract

“…Polyethylene wear in hybrid group was 0.145mm/yr. We did not find any long term follow up study about polyethylene wear rates in hybrid THA except for study by Poole et al [27] and Hernandez et al [28]. They have shown wear rate of 0.173mm/yr and 0.15mm/ yr respectively.…”

Section: Discussionmentioning

confidence: 71%

The Comparison of the Polyeythlene Wear Rates in Hybrid and Uncemented Total Hip Arthroplasty with Stem as a Variant at 8 to 10 Yrs mid Term Follow Up

Naik¹

2018

BJSTR

View full text Add to dashboard Cite

Polyethylene wear in both cemented and uncemented total hip arthroplasty (THA) lead to generation of particles with their access to the interface which has been responsible for periprosthetic osteolysis and subsequent loosening of cup and stem. Many studies have been published studying the pattern of polyethylene wear and its relation to the type of implant (cemented/ uncemented cup or ceramic/metal head) used. No study in our knowledge has strictly focused on the effect of cemented versus uncemented stem on the polyethylene wear rates. We tried to compare the polyethylene wear rates reckoned with software (Poly Ware REV 7) of ultra high molecular weight polyethylene (UHMWPE) in hybrid and uncemented THA and its effect on complications of total hip replacements. We retrospectively reviewed pre-matched 56 patients in uncemented group with 112 patients in hybrid group on the basis of polyethylene wear rate, revision rates and clinical issues, with mean follow up of 9.42 and 7.25 years (yrs.) respectively.Mean polyethylene wear rate in uncemented group was 0.048 milli metres per year (mm/yr.) and it was 0.082 mm/yr. in hybrid. Wear rate in hybrid group ceramic head (0.072mm/yr.) was significant when compared to wear rate ceramic head in uncemented group (0.053mm/yr.), also we found significant difference of poly wear in the metallic group as well. There was no difference in stem loosening and cup osteolysis in low wear (<.05 mm/yr.) and high wear group (>.05mm/yr.) in both uncemented and hybrid THA. The revision was significantly higher in uncemented group but when adjusted with the age, it is equivocal. We found significant difference in polyethylene wear rates, but no significant difference in clinical performance and revisions among the two groups of uncemented THA and hybrid THA when compared on a mid-term 8 to 10 yrs. Follow up.

show abstract

Early Follow-up for a Hybrid Total Hip Arthroplasty Using a Metal-Backed Acetabular Component Designed to Reduce “Backside” Polyethylene Wear

Cited by 5 publications

References 25 publications

Wear simulation of ultra-high molecular weight polyethylene hip implants by incorporating the effects of cross-shear and contact pressure

Wear simulation of ultra-high molecular weight polyethylene hip implants by incorporating the effects of cross-shear and contact pressure

Early Polyethylene Wear and Excessive Acetabular Granuloma in an Uncemented HA-Coated Total Hip Arthroplasty—Midterm Results of a Prospective Study

The Comparison of the Polyeythlene Wear Rates in Hybrid and Uncemented Total Hip Arthroplasty with Stem as a Variant at 8 to 10 Yrs mid Term Follow Up

Contact Info

Product

Resources

About