|اسم الطالب :||Sara MohamedElamin Elhassan Ibrahim|
|المشرف :||Dr. Kamal Eldin Elbadawi Babiker|
|تاريخ النشر :||2016-01-01|
|الدرجة العلمية :||ماجستير|
The aim of this research was to determine the most common anatomical form of roots and canal configurations of the maxillary first premolar among Sudanese population. The study was observational descriptive in nature, diagnostic periapical radiographs were used along with clinical findings. Data was collected from departments of restorative dentistry in some Khartoum state's clinics and hospitals. The study included a total of 80 patients, of which (30) were males and (50) were females with a minimum age of 15 years old and a majority ranging between 26 and 36 years old. It revealed that 30 (37.5 %) of the maxillary first premolars under study had a single root, while 49 (61.25%) had two roots and only one tooth (1.25%) had three roots. The majority of teeth had straight roots ; 28 (93.3%) of the single rooted MFPs were straight, while 2 (6.7%) were curved. 43 (87.8%) of the MFPs which had two roots were straight, while 6 (12.2%) were curved and regarding the single tooth which was found to have three roots all of them were straight. With regard to number of canals 8 (10%) of cases had a single canal, while 71 (88.75%) had two canals and only one (1.25%) had three canals. Of the single rooted MFPs, 22 (73.3%) had a single canal with a mean length of 20.6 mm, while 8 (26.6%) had two canals with a mean length of 20.1 mm for the buccal canal and 20.4 mm for the palatal one. All of the MFPs which had two roots also had two canals; their buccal canal had a mean length of 19.5 mm while the palatal canal had a mean of 19.8 mm. 40 (81.6%) of their roots were separate while 9 (18.4%) were fused and with regard to the single MFP which had three roots, they were found to be separated from each other.