Pc. Oparaugo et al., Correlation of wear debris-induced osteolysis and revision with volumetricwear-rates of polyethylene - A survey of 8 reports in the literature, ACT ORTH SC, 72(1), 2001, pp. 22-28
Citations number
57
Categorie Soggetti
Ortopedics, Rehabilitation & Sport Medicine","da verificare
This survey focused on clinical reports of polyethytene wear and osteolysis
in total hip replacements. With regard to documentation of clinical wear-r
ates, 57 publications were reduced to an analysis of 8 reports of THR serie
s, including the incidence of osteolysis, A direct correlation mas found am
ong volumetric wear-rates, incidence of osteolysis and revision rates in TH
R concepts of the 1983-1987 era. As volumetric wear rate increased, the inc
idence of osteolysis and revision rates increased With regard to our gradin
g system for volumetric wear, with follow-up in the 4-15 year range, osteol
ysis was rare in group A (wear = 0-80 mm(3)/year), ranging from 6% to 31% i
n group B (wear 40-80 mm(3)/year) and from 21% to 100% in group C (mear > 1
40 mm(3)/1year). With regard to cup design, the optimal low-wear group had
mainly cemented polyethylene cups with 22 and 28 mm head sizes, The mid-wea
r group B had metal-backed cemented and uncemented cups, with 28 mm head si
ze, and the high-risk group C had only uncemented, metal-backed cups, with
the highest mear in the 32 mm head size. Less than 10 years of follow-up di
d not distinguish adequately between different designs of THR, except in a
fem cases which had early failures due to material or design deficiencies.
Overall, the cemented all-polyethylene cup combined with the smaller ball h
ead proved to be better.