First experiences with knee prostheses with a tibial component made of trabecular tantalum
Background: Although excellent log-term results have been reported with cemented tibial fi xation, means to improve the longevity of total knee replacements continue to be of interest to clinicians. Based on good results obtained for hip prostheses, one of the possible choices is the use of cementle...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Slovenian Medical Association
2009-12-01
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| Series: | Zdravniški Vestnik |
| Online Access: | http://vestnik.szd.si/index.php/ZdravVest/article/view/840 |
| Summary: | Background: Although excellent log-term
results have been reported with cemented
tibial fi xation, means to improve the longevity
of total knee replacements continue to be
of interest to clinicians. Based on good results
obtained for hip prostheses, one of the possible
choices is the use of cementless fi xation
with improved eff ectiveness of osseointegration.
Tibial components made of trabecular
metal introduced recently have off ered
greatly increased bone ingrowth and good
functional characteristics due to their porous
structure and physical-chemical properties
similar to those of bone. Monoblock design
prevents the back-side wear.
Methods: We have implanted 434 total knee
replacements with tibial components made
of trabecular tantal (Trabecular Metal Monobloc,
Nexgen Legacy). Patient demographic
data were analysed and revision cases were
described.
Results: Aft er a mean follow-up of 28
months fi ve components were revised: three
for infection, one for instability and one for
rigidity.
Conclusions: Cementless knee prosthesis
made of trabecular tantalum has the advantage
of shorter operation time and avoidance of possible adverse eff ects of cement as well
as its deterioration and delamination. With
increasing follow-up period we expect longterm
advantages in terms of improved direct
osseointegration. Disadvantages are the relatively high price of the prosthesis and the
possibility of a potentially higher incidence
of infection due to the lack of antibiotics
from the cement. |
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| ISSN: | 1318-0347 1581-0224 |