RESUMO
BACKGROUND:There are various commonly used interbody fusion methods, such as autologous bone, al ograft bone and titanium-based posterior lumbar interbody fusion, and each method has its own advantages and disadvantages. OBJECTIVE:To observe the clinical efficacy of a bioactive nano-hydroxyapatite/polyamide 66 fusion cage in posterior lumbar interbody fusion for the treatment of lumbar disease. METHODS:A retrospective case analysis was conducted on 16 cases treated with posterior lumbar interbody fusion at the Department of Orthopedic, the First Affiliated Hospital of Gannan Medical University from July 2010 to December 2011, and al the patients were implanted with nano-hydroxyapatite/polyamide 66 biological activity fusion cage. RESULTS AND CONCLUSION:Al the patients were fol owed-up for 10-24 months, and the lumbar pain was significant improved, the lumbar visual analogue score, lumbar Japanese Orthopaedic Association score and Oswestry disability index score were significantly improved during the final fol ow-up period (Pfusion without nano-hydroxyapatite/polyamide 66 fusion cage displacement or subsidence. The results indicate that nano-hydroxyapatite/polyamide 66 fusion cage for the treatment of posterior lumbar interbody fusion can reconstruct the lumbar stability and provide immediate stability after implantation, and has good biological activity.
RESUMO
The present study evaluated biofilm forming capacity, the adherence of Staphylococci spp. to different orthopedic biomaterials and the presence of both icaA and icaD genes among staphylococci strains isolated from patients suffering from orthopedic implant infections. We studied 53 Staphylococcal strains from infections related to orthopedic implants, as regards their ability to form biofilm by using microtitre plate method (MTP), in vitro evaluation of the ability of the biofilm forming strains to adhere to certain biomaterials that used in orthopedic surgery and detection of ica A and ica D among the isolates. 90.9% of S. aureus strains were biofilm positive while, 95% of Coagulase negative staph. were biofilm forming, PMMA demonstrated a significantly highest adherence (P<0.05) followed by stainless steel while, the lowest adherence exhibited by titanium and Biofilm producing strains were positive for icaA and icaD genes while, biofilm negative strains were negative for both genes. Staphylococcus spp. are the major pathogens in orthopedic implants infections. Titanium biomaterials are less susceptible for adherence by bacteria . Biofilms are considered the key factor in the development of implantrelated infections.