تفاصيل الوثيقة نوع الوثيقة : مقال في مجلة دورية  عنوان الوثيقة : Noise level of dental handpieees and laboratory engines Noise level of dental handpieees and laboratory engines   لغة الوثيقة : الانجليزية  المستخلص : Impaired hearing in dental practitioners has been the subject of various investiga- tions. Although individual age and susceptibility can play a signincant rola, the intensity of the noise, distance from The noise source, and total duration of the noise are the important factors in hearing. In this study the noise levels of different handpieees and laboratory engines were evaluated. Handpiece noise measurements were made while instruments were running free and during operation with various cutting tools. These measurements were performed with two kinds of noise- measuring equipment; (1) a precision sound level meter and (2) a noise recording and analyzing circuit. The results indicated that (1) there were significant differ- ences among the noise levels of the various dental engines used, (2) the low-speed, angled-design handpiece has the lowest noise level, whereas the laboratory engine has the highest, (3) the noise level increases during cutting was compared with noncutting , and (4) there was no significant difference between the two methods of measurement. (J PROSTHET DENT 1993;70:356-60.)  ردمد : 0  اسم الدورية : مجلة طب الأسنان الاصطناعي  المجلد : 70  العدد : 4  سنة النشر : 1993 هـ 1993 م  نوع المقالة : مقالة علمية  تاريخ الاضافة على الموقع : Saturday, June 21, 2008  الباحثون اسم الباحث (عربي) اسم الباحث (انجليزي) نوع الباحث المرتبة العلمية البريد الالكتروني سلمى باحنان Bahnnan, Salma باحث رئيسي دكتوراه Sbahnnan@kau.edu.sa أحمد عبد الحميد Abed El-Hamid, Ahmed باحث مشارك دكتوراه   الملفات اسم الملف النوع الوصف  Noise level of dental handpieees and laboratory engines.pdf pdf   الرجوع إلى صفحة الأبحاث