In vitro research of oral microscope-assisted implant surface decontamination / 华西口腔医学杂志

OBJECTIVES@#To investigate the effect of oral microscope-assisted surface decontamination on implants in vitro.@*METHODS@#Twelve implants that fell off because of severe peri-implantitis were collected, and decontamination was carried out on the surfaces of implants through curetting, ultrasound, titanium brushing, and sandblasting at 1×, 8×, or 12.8× magnifications. The number and sizes of residues on the implants' surfaces after decontamination were determined, and the decontamination effect was analyzed according to the thread spacing in the different parts of the thread.@*RESULTS@#1) The 8× and 12.8× groups scored lower for implant surface residues than the 1× group (P<0.000 1), and the 12.8× group scored lower than the 8× group (P<0.001); 2) no difference in residue score was found between the wide and narrow thread pitch (P>0.05), and the 8× and 12.8× groups had lower scores than the 1× group (P<0.001); 3) the lowest number of contaminants was observed at the tip of the thread, whereas the highest was observed below the thread, and the difference was significant (P<0.001). However, the thread pitch had no effect on the number of contaminants in different areas (P>0.05); 4) the residue scores of the 8× and 12.8× groups were lower than those of the 1× group at the thread tip and above, sag, and below the thread of the implants (P<0.05).@*CONCLUSIONS@#Residues on the surfaces of contaminated implants can be effectively removed by using an oral microscope. After decontamination, the residues of pollutants were mainly concentrated below the thread of the implants, and the thread pitch of the implants had no significant effect on the residues.

Assessment Method for Efficiency of Spraying Air Cleaning Products / 环境与健康杂志

Objective To make an assessment method for the efficiency of spraying air cleaning products used in the indoor air. Methods 1.5 m3 chamber was used, the temperature was (21?2.5) ℃ and the relative humidity was (40?5)%. The formaldehyde of 10 times of the standard limit was added in the chamber, then the products were sprayed, the air cleaning efficiency was assessed at different times. Results The polluted indoor air by formaldehyde could be purified by air the cleaning products, the CADRq≥2.0?10-2 m3/(min?g) within 60 min. Conclusion The assessment method is accurate and applicable to the assessment of efficiency of spraying air cleaning products used in the indoor air cleaning.

Development of multi-functional cleaning-out device for medical apparatus / 医疗卫生装备

Objective To develop a kind of multi-functional cleaning-out device for medical apparatus.Methods Drawing on experience of traditional medical apparatus cleaning techniques by human or machine,a new cleaning-out device was designed.The prototype was made and proofed by series of tests.Results This device has outstanding advantages in producing cost,cleaning quality and cleaning cost.Conclusion This device worth popularizing for its easy-operation and low cost.