Wear Performance of Large Diameter Differential Hardness Hip Bearings

Barnes, C. Lowry; DeBoer, David K.; Carroll, Michael; Obert, Richard M.; Nambu, Satya

doi:10.1016/j.arth.2008.01.251

Cited by 14 publications

(27 citation statements)

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“…Therefore, it is important to distinguish between smaller-diameter MOM THA and LD-MOM THA. Furthermore, it is axiomatic that not all MOM articulations are necessarily the same due to differences not only in head sizes but also in geometry, sphericity, metallurgy, surface finish, method of fabrication, and acetabular design [1,2,15,22,27,36,43,56]. Thus, the potential benefits of MOM THA may be offset by the above concerns.…”

Section: Introductionmentioning

confidence: 96%

“…results ''equivalent'' to metal-on-polyethylene THA [13] and reported survival rates of 86% at 5 years [21], 94% at 10 years [46], 98% at 10 years [29], 99% at 2 years [47], 99% at 6 years [18], and 100% at 7 years [19]. LD-MOM THA articulations (C 36 mm [14,30,43]) offer the potential advantages of less wear than smaller MOM heads [1,2,12,16,22,50] and reduced risk of dislocation [33,43] and may be a reasonable alternative for younger, more active patients [33,37,41]. Therefore, it is important to distinguish between smaller-diameter MOM THA and LD-MOM THA.…”

Section: Introductionmentioning

confidence: 99%

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Low Incidence of Groin Pain and Early Failure with Large Metal Articulation Total Hip Arthroplasty

Meding

Keating

et al. 2012

Clinical Orthopaedics &Amp; Related Research

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Background Large-diameter metal-on-metal articulations reportedly improve stability and wear in THAs. However, some reports suggest some patients have unexplained hip and early failures with these implants. Thus, the potential benefits may be offset by these concerns. However, the incidence of these problems is not clearly established. Questions/purposes We therefore assessed hip pain, function, osteolysis, and complications in patients with large-diameter metal-on-metal THA. Patients and Methods We retrospectively reviewed 611 patients who had 681 large-diameter metal-on-metal THAs with the same cup and head design. The average age at operation was 62 years, 53% of the THAs were in men, and the average body mass index was 32 kg/m 2 . The diagnosis was osteoarthritis in 92% of the THAs. The minimum followup was 24 months (mean, 37 months; range, 24-60 months). Results Nine of the 611 patients (1.5%) experienced moderate or severe pain in the hip region that we considered to be coming from an extraarticular source in each case. Harris hip scores for pain averaged 42 points. Total Harris hip scores averaged 93 points. Cup abduction averaged 42°, and cup anteversion averaged 26°. There were no infections. Three cups (0.4%) were considered radiographically loose. All were secondary to inadequate seating of the shell. Conclusion Our observations suggest with this implant the concerns of higher incidences of groin pain, early failures, and adverse tissue reactions were not confirmed. Early successes or failures with large-diameter metal-onmetal articulations may be implant specific.

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Low Incidence of Groin Pain and Early Failure with Large Metal Articulation Total Hip Arthroplasty

Meding

Keating

et al. 2012

Clinical Orthopaedics &Amp; Related Research

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“…A ceramic-on-metal (CoM) bearing for THA has been studied in hip simulators and clinically at 12 months [1,2,4,5,8,10,11,[19][20][21][22][23]. The CoM bearing has potential advantages over other bearing surfaces.…”

Section: Introductionmentioning

confidence: 99%

No Difference in Reoperations at 2 Years Between Ceramic-on-metal and Metal-on-metal THA: A Randomized Trial

Engh

Sritulanondha

Korczak

et al. 2016

Clinical Orthopaedics &Amp; Related Research

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Background Hard-on-hard bearings for total hip arthroplasty continue to warrant analysis even though crosslinked polyethylene is performing very well. Ceramicon-metal (CoM) has low in vitro wear and did well in an early clinical trial. We report on a prospective, randomized, multicenter investigational device trial comparing CoM with metal-on-metal (MoM). Questions/purposes (1) Is there a difference in the number or type of revisions comparing CoM with MoM? (2) Are cobalt and chromium metal levels different for CoM and MoM THA? Methods Between

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“…Historically, the first-generation metal-on-metal components were fabricated by casting(Hernandez-Rodriguez 2005), whereas contemporary secondgeneration metal-on-metal implants are manufactured from wrought CoCr alloys. (Barnes 2008) Wrought CoCr alloys have significantly enhanced hardness, yield strength, and ultimate properties as compared with cast alloys, resulting from their more uniform carbide microstructure. All CoCr alloys used in orthopaedics contain trace constituents of carbon (0.35%), nitrogen (max 0.25%), nickel (max 1%), iron (max 0.75%), silicon (max 1.0%), and manganese (max 1.0%).…”

Section: Composition and Microstructure Of Cocr Alloysmentioning

confidence: 99%

The Bearing Surfaces in Total Hip Arthroplasty – Options, Material Characteristics and Selection

Hosseinzadeh¹,

Eajazi²,

Shahi³

2012

Recent Advances in Arthroplasty

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Wear Performance of Large Diameter Differential Hardness Hip Bearings

Cited by 14 publications

References 0 publications

Low Incidence of Groin Pain and Early Failure with Large Metal Articulation Total Hip Arthroplasty

Low Incidence of Groin Pain and Early Failure with Large Metal Articulation Total Hip Arthroplasty

No Difference in Reoperations at 2 Years Between Ceramic-on-metal and Metal-on-metal THA: A Randomized Trial

The Bearing Surfaces in Total Hip Arthroplasty – Options, Material Characteristics and Selection

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