{"id":962,"date":"2019-09-20T14:28:33","date_gmt":"2019-09-20T12:28:33","guid":{"rendered":"https:\/\/magazine.zhermack.com\/laboratory-en\/rischio-di-cross-contamination-non-solo-per-il-paziente-ma-anche-tra-clinica-e-laboratorio\/"},"modified":"2025-05-08T09:59:59","modified_gmt":"2025-05-08T07:59:59","slug":"cross-contamination-for-patient-also-clinic-and-laboratory","status":"publish","type":"post","link":"https:\/\/magazine.zhermack.com\/en\/hygiene-en\/cross-contamination-for-patient-also-clinic-and-laboratory\/","title":{"rendered":"Risk of cross contamination: not only for the patient but also between the clinic and the laboratory"},"content":{"rendered":"\n

Prosthodontic treatment consists of various phases, which involve both health facilities and dental laboratories. This could cause cross contamination between clinics and dental laboratories in charge of developing and preparing dental prostheses.<\/p>\n\n\n\n\n\n\n\n

After addressing cross contamination for the patient<\/a><\/strong>, let\u2019s now look at what cross contamination in clinics and laboratories is and how it can be prevented.<\/p>\n\n\n\n

The role of pumice stone used to polish dental prostheses<\/h2>\n\n\n\n

In the past, bacterial cross\ncontamination between a dental laboratory and a dental clinic or surgery was\ngiven little attention; however, recent literary articles have addressed the\ncorrelations existing between the two facilities, demonstrating that new prostheses were being contaminated\nduring polishing in the laboratory<\/strong> and not just by commensal organisms, but\nalso by pathogen bacteria such as group A and group B streptococci,\nStaphylococcus aureus, Escherichia Coli and Candida Albicans, originating from\nnew prostheses polished with a pumice stone before being sent to the clinic\n(Khann et al., 1982).1<\/sup><\/p>\n\n\n\n

In addition, other studies have\ndemonstrated that pumice stone used to\npolish prostheses may be contaminated by alternative sources <\/strong>to the\npatient\u2019s prostheses and have Pseudomonas isolated by the water, staphylococci\nand the species of airborne bacilli.2<\/sup><\/p>\n\n\n\n

Even more attention to the maintenance phase<\/h3>\n\n\n\n

A very interesting study has\nexamined a further risk of cross contamination in the work phases between the\ndental facility and the dental laboratory, to be precise between new dental prostheses and prostheses sent to the laboratory for\nadditions and\/or repairs<\/strong>.<\/p>\n\n\n\n

The results of laboratory tests\nshowed a higher bacterial load in prostheses sent to the laboratory for\nmaintenance, while the lower load was found in new prostheses after polishing\nwith pumice stone.<\/p>\n\n\n\n

Staphylococcus<\/strong> aureus<\/strong> was isolated only from 12% of\nthe prostheses sent in the laboratory for additions, but it was not isolated\nfrom any new prostheses after polishing with pumice stone.<\/p>\n\n\n\n

The above-mentioned study clearly\ndemonstrates the risks of cross contamination in prosthodontics.<\/p>\n\n\n\n

How to prevent cross contamination effectively<\/h3>\n\n\n\n

Cross contamination of equipment\nthat cannot be sterilised in the dental surgery and laboratory represents a danger to the health of the dental surgery\nteam and of the patients<\/strong>.<\/p>\n\n\n\n

In accordance with international\nrecommendations, all devices, including impressions, must be accurately cleaned\nby removing blood residue, saliva and\nbiological residue <\/strong>and then disinfected using hypochlorite solution at 1%\nor with specific disinfectant solutions with a proven spectrum of action,\nbefore delivery to and from the laboratory.<\/p>\n\n\n\n

The pumice stone must be prepared<\/strong> with sodium hypochlorite and changed daily. The brushes for\npolishing prostheses must also be treated with sodium hypochlorite.\n\nThese recommendations do not eliminate the risk of cross contamination\nbetween the dental surgery and the dental laboratory or vice versa, but they do\ncontribute in some way to reducing it and to making the environment for the\ndental team and for the patient safer.3<\/sup><\/p>\n\n\n\n

\n\n\n\n

Article by Stefania Barbieri<\/em><\/p>\n\n\n\n

<\/div>\n\n\n\n

1<\/sup><\/em>.Kahn RC, Lancaster MV, Kate W. The microbiologic cross-\ncontamination of dental prostheses. J Prosthet Dent. 1982;47:556-9.<\/em><\/p>\n\n\n\n

2<\/sup><\/em>.Verran J, Winder C, McCord JF, Maryan CJ. Pumice slurry as a\ncross infection hazard in nonclinical (teaching) dental technology\nlaboratories. Int J Prosthodont. 1997;10:283-6.<\/em><\/p>\n\n\n\n

3<\/sup><\/em>.Neville Debattista, Mario Zarb, John M. Portelli. Bacterial\ncross-contamination between the dental clinic and laboratory during prosthetic\ntreatment<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

Prosthodontic treatment consists of various phases, which involve both health facilities and dental laboratories. This could cause cross contamination between clinics and dental laboratories in charge of developing and preparing dental prostheses.<\/p>\n","protected":false},"author":1,"featured_media":940,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"rs_blank_template":"","rs_page_bg_color":"","slide_template_v7":"","footnotes":""},"categories":[37],"tags":[],"class_list":["post-962","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hygiene-en"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/magazine.zhermack.com\/en\/wp-json\/wp\/v2\/posts\/962","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/magazine.zhermack.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/magazine.zhermack.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/magazine.zhermack.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/magazine.zhermack.com\/en\/wp-json\/wp\/v2\/comments?post=962"}],"version-history":[{"count":1,"href":"https:\/\/magazine.zhermack.com\/en\/wp-json\/wp\/v2\/posts\/962\/revisions"}],"predecessor-version":[{"id":5982,"href":"https:\/\/magazine.zhermack.com\/en\/wp-json\/wp\/v2\/posts\/962\/revisions\/5982"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/magazine.zhermack.com\/en\/wp-json\/wp\/v2\/media\/940"}],"wp:attachment":[{"href":"https:\/\/magazine.zhermack.com\/en\/wp-json\/wp\/v2\/media?parent=962"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/magazine.zhermack.com\/en\/wp-json\/wp\/v2\/categories?post=962"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/magazine.zhermack.com\/en\/wp-json\/wp\/v2\/tags?post=962"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}