Document Details Document Type : Article In Journal  Document Title : EFFECT OF DIFFERENT ROTATIONAL SPEEDS OF LIGHTSPEED EFFECT OF DIFFERENT ROTATIONAL SPEEDS OF LIGHTSPEED   Document Language : English  Abstract : The aim of the present study was to assess LightSpeed instrumentation behavior in apical canal preparation using two rotational speeds; 750 and 2000 r.p.m. Fifty single rooted teeth with 20-30" apical curvatures were prepared using LightSpeed instruments of sizes 20 through 47.5. Roots were sectioned at 2, 4, and 6 mill from their apices. the cross root sections were photographed at a standard magnification and distance before preparation. Teeth were reassembled using a specially designed muffle. Then, they were divided into two groups after which root canal preparation was done. Group! was prepared at 750 r.p.m. while group 11 at 2000 r.p.m. Pre and post instrumentation photographs were superimposed and subjected to image computer analysis "Image J Program". Measured parameters were pre and post instrumentation canal area and displacement distance. ResuIts showed generally a gradual increase in canal area coronal wards. A slight increase in canal area was found in the 750 r.p.m. group as compared to the 2000 r.p.m one at 4 and 6 mm Ievels. However, this difference was found to be" statistically insignificant. Canal preparation remained relatively centralized where a statistically insignificant canal center displacement was found. at both preparation speeds. We can conclude that LightSpeed instrumellls produced a centralized preparation with minimal canal transportation and with no significant effect of rotational preparation speed variation on canal area and centering ability. * Lecturer in Endodontic Division, Dept. of Conservative Dental Science, Faculty of Dentistry. King Abdulaziz University. Specialist in Endodontics, Faculty of Dentistry. King Abdulaziz University. * * Professor of Endodontics , Dept. of Conservative Dental Science, Faculty of Dentistry, King Abdulaziz UniversilY. Consultant in Endodontics. Faculty of Dentislry. King Abdulaziz University.  ISSN : 0  Journal Name : Egyptian dental journal  Volume : 51  Issue Number : 1  Publishing Year : 2005 AH 2005 AD  Article Type : Article  Added Date : Friday, January 4, 2008  Researchers Researcher Name (Arabic) Researcher Name (English) Researcher Type Dr Grade Email مديحة جمعة Gomaa, Madiha Investigator Doctorate mmahamad@kau.edu.sa ليلى باهمام Bahammam, Laila Researcher Doctorate lbahammam@kau.edu.sa Files File Name Type Description  EFFECT OF DIFFERENT ROTATIONAL SPEEDS OF LIGHTSPEED INSTRUMENTS ON CANAL MORGHOLOGY.pdf pdf   Back To Researches Page