Abstract
La h e y and Mason,1 Loretz,2 Foster, LeMay and Johnstone,8 Parke4 and Harvey, LeMay and Shuttleworth,5 stated that hot oil is superior to other means of disinfecting dental handpieces and delicate metallic instruments, in that it prolongs the efficiency of the instru ments. Differences of opinion exist regarding the time required and the temperature at which oil should be maintained for disinfection and sterilization of instru ments. Appleton6’7 concluded that ordi nary mineral or paraffin oil at 130 C. for five minutes will suffice if only asporogenic bacteria-are considered; but if one wishes to destroy bacterial spores, 185 C. for five minutes, 175 C. for 10 minutes or 165 G. for 15 minutes should be used. Foster, LeMay and Johnstone3 empha sized the need for at least 30 minutes at 150 G. for sporicidal effect. Loretz2 has suggested a germicidal oil which is reported to be effective within 15 min utes at 100 C. in sterilizing handpieces contaminated with a spore-forming bac terium, which resisted oil at 100 G. for 15 minutes. Harvey, LeMay and Shuttleworth5 used two mixtures: (1) AC. 10 (surgi cal), consisting of 95 per cent of a light petroleum neutral oil (containing ap proximately 64 per cent paraffins, 31 per cent naphthenes, 5 per cent aromatics) and 5 per cent of a complex of metallic petroleum sulphonates of mo lecular weights between 400 and 500 and average composition of the order C24H37SO3X-C30H50SO3X, and (2) AG. 10 soda solution, a mixture of 2 Gm. of sodium carbonate decahydrate and 2 cc. of AC. 10 (surgical) in enough water to make 100 cc. The suggested technic was to soak the handpieces in AC. 10 (surgical), boil and allow to dry over night, and after each use boil in AC. 10 soda solution. Five minutes’ boiling in AC. 10 soda solution was considered ef fective in destroying vegetable cells, but more than 30 minutes was necessary to be absolutely certain of complete de struction of spores. In reference to the time required to kill spores, Harvey, Le May and Shuttleworth5 state:
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
