Document 06JjLLOE9vK86ZrdER5Epj99b

FILE NAME Dental Asbestos DEN DATE 1967 June 6 DOC DEN001 DOCUMENT DESCRIPTION Journal Article - Journal of the British Dental Association - The Possible Adverse Effects of Asbestos in Gingivectomy Packs ipl edea to i 22) | ll tidy } Pep arte JOURNAL a hb ees CG AUNT Ao Sa TUS: Te 1 in an = anaM Leroi Bae Reneceticr A (1) mere weer ieee ee mee * |b are = ee ry iE et ae oe Volume 122 Number 11 - June 6 1967 alte ee SA D. K. Mason The Salivary and Thyroid Glands R. McG Harden EE W. D. Alexander e Thermal Behaviour of Silica and its Application to RE Dental Investments Derek W. Jones Sf Sore The Geographical Distribution of Dental Care in the Paula J. Cook TTS United Kingdom we Le - ws R. O. Walker Molybdenum and Dental Caries G. Neil Jenkins TRE President's Address at the Opening of the Twenty- TLE ch Fifth Session of the General Dental Council Sir Robert Bradlaw Retch The Possible Adverse Effects of Asbestos in 2d 7 Gingivectomy Packs M. R. Y. Dyer ete hd et stag New Technique for Silicate Fillings Tala H. J. Elsey Ten lartabica TEMAS Digs Oh contents A full list of the Tae will be found on page ii te mG rnge a i ON a in eagle SE ge The Journal of the British Dental Association CR age ie : routine Gays Ole i Dyer M.R. Br Dent J122 6/6/67 | THE POSSIBLE ADVERSE EFFECTS OF | ASBESTOS IN GINGIVECTOMY PACKS M Y. DYER R.D.S. ASBESTOS libres sometimes used in gingivectomy packs may if inhaled seriously endanger the health Such inhalation is made the more likely because the chairside assistant nsually shakes the bottle containing the dry constituents of the pack so that on opening the bottle a cloud of dust is emitted That the asbestos contained in this dust cloud could casily he inhaled was demonstrated by placing microscope slides covered in egg albumin to aid dest adhesion adjacent to the pack mixing area at table height and at inhalation level 3 feet above the height of the table Gingivectomy packs were then prepared with and without shaking the bottle In both cases asbestos fibres were observed on slides RidRe treads at the two heights thus demonstrating that the distribution of asbestos fibre in air is not dependent me on shaking the bottle intnds Microscope slides placed 5 minutes after the gina commencement of mixing and allowed to collect segat dust for 5 minutes did not show any asbestos a Tay fibres The inhalation of asbestos may have one of three SRE effects 1 Asbestosis This is pulmonary fibrosis and focal REve alveolar wall thickening associated with asbestos aE bodies Asbestos bodies are asbestos particles Surrounded by an iron protein complex 2 Lung Cancer The association between asbestosis and lung cancer was first shown to exist by BSR Gloyne 1935 and has later been confirmed by SRT many others Doll 1955 found that in 105 necropsies ou asbestos workers there were 18 cases of lung cancer 15 of which were in association with asbestosis The association of asbestosis and lung Po cat is strengthened by the fact that the majority of these the lower lobes of the : tumours occur in ' of of these tumours occur the lower lobes fo lung where the changes of asbestosis are most 1953 gp b Severe Severe eslbacher eselbacher eesseellbbaacchher etet aall 19531953 i The lung cancers may be any histological type , ia #ulzrodu #ulzrodu g being the being emoma common the common most common x 13 Mesothelioma This is a malignant discuse & Ogioning in mesothebum When associated with i asbestor affects pleura and pentoncum E tt asbestor asbestor . affects the the pleura and pentoncum pentoncum ;_ . a The The London London Hosptal Medical Medical Cola Dental School 1 undan 11 % ; 3 Wagner et al 1960 found that 32 of 33 patients with histologically proved pleural mesotheliomata had been exposed to asbestos Hourihane 1964 found true diffuse mesothelio mata in 83 necropsies and drew attention to the relationship between contact with asbestos and this disease Newhouse and Thompson 1965 studied the social histories of 71 of these 83 patients At least 51 had proven contact with asbestos Often the contact with asbestos was limited to living near an asbestos factory or being the relative of an asbestos worker Hourihane 1964 says Many cases of mesotheliomata gave no history of industrial exposure to asbestos and is possible that temporary or relatively trivial exposure may have occurred , There are three principal types of asbestos in use industrially Chrysotile which represents 931 per cent of the world's production crocidolite and amosite used in Medical woolly asbestos B.D.II often gingivectomy packs is prepared from crude chrysotile There is no evidence to suggest that these different types have different effects for the Working Group on Asbestos and Cancer International Union Against Cancer decided 1965 that The evidence indicates that the associated FURTHER THIS FURTHER FURTHER THAT FURTHER STATES THIS LAW MATERIAL IS MATERIAL IS COPYRIGHT MATERIALIS PROHIBTED REPODUCTION COPYRIGHT SUBJECT NOTICE REPRODUCTION REPRODUCTION SUBJECT NOTICE REPRODUCTION SUBJECT LAW PROHIBITED REPRODUCTION NOTICE REPRODUCTION SUBJECT IN NOTICE TO TITLE17 THE VIOLATION UNITEDCODEU.S. VIOLATION OF CODECODE ) cancers of the lung are not limited to exposure to any one type of asbestos fibre Clearly the dentist who during a lifetime of practise may expose himself and his assistants to Considerable quantities of asbestos is faced with the inevitable conclusion that in the light of the present medical evidence the use of gingivectomy packs containing asbestos should be discontinued Pre- ferably one preparations preparations preparations preparations of the which which several do not commercially available contain contain contain this this potential y potentially dangerous material should be used REFERENCEY Dull 197ty Brit Indu ir Med 12 81 Gloyae R. 1935 Zabercle Edinha 17 Hanumane Thorax O. H. 1964 19 268 Telbacher J. Khur T. and Hardy UT L. ( ) Amer 7. Med Newhouse M. E. and Thu T. 1965 Handlustr Handlustr Handlustr , sle2d2 201 WarJ. .. Sleath CA and Marchand P. 150 Brita Brita industr AL 17 260 Working Group an Asbertus and Cancer 196 deeve natron TRA 221 JUNE 6 1967 507