Vieira, Erica, Gayle2018-06-052018-06-051981https://hdl.handle.net/10539/24594A dissertation submitted to the Faculty of Dentistry of the University of the Witwatersrand, Johannesburg, in fulfilment of the requirements for the Degree of Master of Science in DentistryThere is an increasing concern that the pollution of operating theatre and dental surgery atmosphere with anaesthetic gases my be injurious to operating theatre personnel and dental surgery staff. A review of the relevant literature ,reported in chapter 1 of this dissertation examined, epidemiological and experimental evidence regarding this concernenNitrous OxideFetusThesis