[An attempt to assess the effect of stress in the femoral bone after implantation of the Weller endoprosthesis on changes within bone tissue in correlation with densitometry examination].
The paper presents comparative analysis of stress distribution, determined by finite elements method in normal femoral bone and one after Weller total hip replacement, with Gruen zones in consideration. An attempt to correlate an effort and bone tissue state has been made. The results of computer simulation have been compared with results of densitometry. It was found, that alloplasty unloads bone tissue along the stem and particularly around trochanteric area. Dual energy X-ray densitometry performed 7 days, 6 and 12 months after surgery revealed decreased BMC and BMD values in all analyzed zones. The greatest decrease was noted in zone 7.1 and 6.
Kusz
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Katedry i Kliniki Ortopedii Sl. AM w Katowicach.
Okrajni
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J
D015502:Absorptiometry, Photon; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects*; D015519:Bone Density; D003198:Computer Simulation; D005269:Femur / Q000000981:diagnostic imaging / Q000503:physiopathology*; D006801:Humans; D008875:Middle Aged; D008954:Models, Biological; D013314:Stress, Mechanical