نوع مقاله : Research Paper
نویسندگان
1 متخصص پروتزهاى دندانى (پروستودانتیکس)، گروه پروتز دانشکده دندانپزشکى، دانشگاه علوم پزشکى مشهد، مشهد، ایران.
2 گروه مهندسى بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکى مشهد، مشهد، ایران.
چکیده
زمینه و هدف: کیفیت آب یونیت‌های دندانپزشکی اهمیت بالایی در سلامت بیماران و پرسنل دارد، زیرا آب مصرفی این دستگاه‌ها می‌تواند منبع رشد میکروارگانیسم‌ها و بیوفیلم باشد. هدف این مطالعه بررسی آلودگی میکروبی آب مصرفی یونیت‌های دندانپزشکی شهر مشهد بود.
مواد و روش‌ها: در یک مطالعه مقطعی - توصیفی، 23 یونیت از 6 کلینیک دندانپزشکی انتخاب شد. نمونه‌برداری از بخش‌های مختلف یونیت شامل لیوان پرکن، پوآر آب و مجرای سر توربین، قبل و بعد از فلاشینگ، طی سه هفته و در روزهای شنبه، دوشنبه و چهارشنبه انجام شد. حجم نمونه‌ها 50 میلی‌لیتر بود و نمونه‌ها به آزمایشگاه منتقل و با روش HPC و تخمیر چند لوله‌ای جهت شناسایی باکتری‌های هتروتروف و کلی‌فرم بررسی شدند. داده‌ها با نرم‌افزار SPSS نسخه 21 تحلیل شد.
یافته‌ها: از 1242 نمونه بررسی‌شده، 78/6 درصد (976 نمونه) دارای آلودگی باکتریایی بودند و 62/4 درصد (615 نمونه) از حد مجاز ADA (200 CFU /mL) فراتر رفتند. میانگین شمارش کل باکتریایی 257 ± 54 CFU/mL بود. میانگین آلودگی در بخش‌های مختلف یونیت متفاوت بود و بیشترین مقدار در مجرای سر توربین قبل از فلاشینگ مشاهده شد. هم‌چنین آلودگی در ابتدای هفته نسبت به سایر روزها بیشتر بود.
نتیجه‌گیری: آلودگی میکروبی آب یونیت‌های دندانپزشکی نسبتا بالا بود و توجه مستمر به اقدامات پیشگیرانه مانند فلاشینگ منظم، استفاده از فیلترها و ضدعفونی دوره‌ای ضروری است. رعایت این اقدامات می‌تواند خطر انتقال عفونت به بیماران و پرسنل را کاهش داده و کیفیت خدمات دندانپزشکی را بهبود دهد.
کلیدواژه‌ها
عنوان مقاله [English]
Evaluation of Bacterial Contamination of Dental Unit Waterlines in Mashhad (2024)
نویسندگان [English]
- Majid Bonyadimanesh 1
- Ali Afkham 2
1 Specialist in Dental Prosthetics (Prosthodontics), Department of Prosthetics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.
2 Department of Environmental Health Engineering, Faculty of Health, Mashhad University of Medical Sciences, Mashhad, Iran.
چکیده [English]
Background and Objective: Water quality in dental units is crucial for the health of patients and staff, as unit waterlines can harbor microorganisms and biofilms. This study aimed to assess microbial contamination in dental unit water in Mashhad.
Materials and Methods: In this cross-sectional descriptive study, 23 dental units from 6 clinics were selected. Samples were collected from various unit components, including cup fillers, water spouts, and turbine heads, before and after flushing, over three weeks on Saturdays, Mondays, and Wednesdays. Each sample volume was 50 mL. Samples were analyzed in the laboratory using heterotrophic plate count (HPC) and multiple-tube fermentation methods for heterotrophic and coliform bacteria. Data were analyzed using SPSS version 21.
Results: Of the 1242 samples, 78.6% (976 samples) showed bacterial contamination, and 62.4% (615 samples) exceeded the ADA standard of 200 CFU/mL. The mean total bacterial count was 257 ± 54 CFU/mL. Contamination varied across unit components, with the highest levels in the turbine head before flushing. Early-week samples showed higher contamination compared to other days.
Conclusion: Microbial contamination in dental unit water was relatively high. Regular preventive measures such as flushing, use of appropriate filters, and periodic disinfection are essential to reduce the risk of infection transmission and improve the quality of dental care.
Open Access Policy: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/
کلیدواژه‌ها [English]
- Microbial Contamination
- Dental Unit Water
- HPC
- Biofilm
- Flushing
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