[Long-term results of thrust plate prostheses: comparison of patients younger than and older than 50 years].
BACKGROUND
Hip replacement in patients younger than 50 years old is no longer an exception in view of the increasing necessity for care. The aim of the present study was to analyze whether the results after implantation of thrust plate prosthesis (TPP) with metaphyseal anchorage are equal for patients below 50 years compared to older patients.


METHODS
The investigation comprised 465 TPP implantations. In 149 TPP the patient age was below 50 years (group A) und in 316 TPP cases above 50 years (group B). Clinical and radiological evaluation of the results for both groups was carried out as well as a differentiated survival analysis with defined endpoints.


RESULTS
Survival analysis of group A (96%/13.2 years) showed a significantly improved survival rate compared to group B (86%/12.5 years). Additionally, the risk of prosthesis and/or radiological signs loosening of was significantly lower in group A than in group B (p <0.05).


CONCLUSIONS
Comparison of long-term results of prostheses with intramedullary fixation shows that the anchorage principle of TPP with bone-saving implantation to the proximal femur is justified especially for patients below 50 years of age.
Institut für Klinische Radiologie, Westfälische Wilhelms-Universität Münster, Münster, Deutschland.
S
S
Wienbeck
N
N
Osada
E
E
Basad
H
H
Stürz
B A
BA
Ishaque
D000328:Adult; D017677:Age Distribution; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000401:mortality*; D001860:Bone Plates / Q000706:statistics & numerical data*; D005260:Female; D005858:Germany / Q000453:epidemiology; D006622:Hip Prosthesis / Q000706:statistics & numerical data*; D006801:Humans; D007593:Joint Instability / Q000401:mortality* / Q000601:surgery*; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D018570:Risk Assessment; D012307:Risk Factors; D016019:Survival Analysis; D015996:Survival Rate; D016896:Treatment Outcome; D055815:Young Adult
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