Aim.
Alpha Lipoic Acid (L.A.) is an effective natural antioxidant discovered in the human body in 1951 from L.J. Reed and I.C. Gunslaus from liver. It is inside broccoli, spinach and red meats, especially liver and spleen. Actually it is largely used as antioxidant in antiaging products according to the low toxicity level of the product. The present study take into consideration the possibility to reduce oxidation of medical irradiated UHMWPE GUR 1050, mixing together polyethylene powder and Alpha Lipoic Acid powder. The study is composed of two parts. Part 1 Thermostability of alpha lipoic acid during polyethylene fusion Part 2 detection of oxygen level in artificially aged irradiated polyethylene. Solid pieces were made with Gur 1050 powder (Ticona Inc., Bayport, Tex, USA) and mixed with Alpha Lipoic Acid (Talamonti, Italy, Stock 1050919074) 0,1%-‐0,3%-‐0,5%-‐1%-‐2% and gamma ray irradiated with 30 kGy (Isomedix, Northborough, MA). An owen (80° Celsius) was used to produce an aging effect for 35 days in the doped and control samples (Conventional not doped polyethylene). This process simulate an aging effect of 10 years into the human body. Part 1 :
Alpha Lipoic Acid (L.A.) is an effective natural antioxidant discovered in the human body in 1951 from L.J. Reed and I.C. Gunslaus from liver. It is inside broccoli, spinach and red meats, especially liver and spleen. Actually it is largely used as antioxidant in antiaging products according to the low toxicity level of the product. The present study take into consideration the possibility to reduce oxidation of medical irradiated UHMWPE GUR 1050, mixing together polyethylene powder and Alpha Lipoic Acid powder. The study is composed of two parts. Part 1 Thermostability of alpha lipoic acid during polyethylene fusion. Part 2 detection of oxygen level in artificially aged irradiated polyethylene. Solid pieces were made with Gur 1050 powder (Ticona Inc., Bayport, Tex, USA) and mixed with Alpha Lipoic Acid (Talamonti, Italy, Stock 1050919074) 0, 1% and gamma ray irradiated with 30 kGy (Isomedix, Northborough, MA). An oven (80° Celsius) was used to produce an aging effect for 35 days in the doped and control samples (Conventional not doped polyethylene). This process simulate an aging effect of 10 years into the human body.
Calcium sulphate (CaSO4) is a resorbable material
that can be used simultaneously as filler of a dead space and as
a carrier for the local application of antibiotics. Our aim was
to describe the systemic exposure and the wound fluid concentrations
of vancomycin in patients treated with vancomycin-loaded CaSO4 as
an adjunct to the routine therapy of bone and joint infections. A total of 680 post-operative blood and 233 wound fluid samples
were available for analysis from 94 implantations performed in 87
patients for various infective indications. Up to 6 g of vancomycin
were used. Non-compartmental pharmacokinetic analysis was performed
on the data from 37 patients treated for an infection of the hip.Aims
Patients and Methods