بررسي آناتومي ومورفولوژي ريشه و كانال پره مولر دوم فك بالا با استفاده از توموگرافي كامپيوتري پرتو مخروطي

Evaluation of Root Canal Morphology and Anatomy of Maxillary Second Premolars Using Cone-Beam Computed Tomography

بررسي مورفولوژي و آناتومي ريشه و كانال دندان ها جهت موفقيت درمان ريشه اهميت زيادي دارد. هدف از مطالعه حاضر تعيين مورفولوژي ريشه و كانال پره مولر دوم فك بالا با استفاده از تكنيك پرتو مخروطي تصاوير توموگرافي كامپيوتري (Cone-Beam Computed Tomography (CBCT)) در يك مركز راديولوژي ميباشد. مواد و روش كار تصاوير CBCTبايگاني سال 1393يك مركز راديولوژي فك و صورت در قزوين با نرم افزار Romexis ارزيابي شدند. بررسي تصاوير توسط يك راديولوژيست و يك اندودنتيست از نظر تعداد ريشه ها و مورفولوژي آن ها، تعداد كانال ها، جهت انحناي ريشه و كانال ها در ابعاد باكولينگوالي و مزيوديستالي در دو جنسيت با آزمون مربع كاي دو بررسي شد. سطح معناداري برابر 5%درنظر گرفته شده است . يافته ها ﻣﺠﻤﻮﻋﺎ 106 CBCT ﮐﻪ داراي 117 دﻧﺪان ﭘﺮه ﻣﻮﻟﺮ دوم ﺑﻮد ارزﯾﺎﺑﯽ ﺷﺪﻧﺪ. در ﻣﯿﺎن آﻧﻬﺎ 93/2% ﺗﮏ رﯾﺸﻪ اي و 6/8% )8 دﻧﺪان( دو رﯾﺸﻪاي ﺑﻮدﻧﺪ. ﺗﻔﺎوت ﻣﻌﻨﯽ داري از ﻧﻈﺮ ﺗﻌﺪاد رﯾﺸﻪ ﻫﺎ ﺑﯿﻦ دو ﺟﻨﺲ وﺟﻮد ﻧﺪاﺷﺖ )0/164=Pv(. در دﻧﺪان ﻫﺎي ﺗﮏ رﯾﺸﻪاي ﺑﺮ اﺳﺎس ﻃﺒﻘﻪ ﺑﻨﺪي ورﺗﻮﭼﯽ 65) %59/6 ﻣﻮرد( ﺗﯿﭗ I،20/2 % ﺗﯿﭗ II، 9/2% ﺗﯿﭗ III، 0/9% ﺗﯿﭗ IV، 6/4% ﺗﯿﭗ V، 1/8% ﺗﯿﭗ VI و 1/8% ﺗﯿﭗ VII ﺑﻮدﻧﺪ. 87/5% دﻧﺪان ﻫﺎي ﭘﺮه ﻣﻮﻟﺮ دوم دو رﯾﺸﻪ اي در رﯾﺸﻪ ﺗﯿﭗI و12/5% ﺗﯿﭗ III ﺑﻮدﻧﺪ. ﻧﺘﯿﺠﻪ ﮔﯿﺮي:در ﭘﺮه ﻣﻮﻟﺮ دوم ﻓﮏ ﺑﺎﻻ ﺑﯿﺸﺘﺮ دﻧﺪان ﻫﺎ ﺗﮏ رﯾﺸﻪ و ﺗﯿﭗ I وII ﻣﯽ ﺑﺎﺷﻨﺪ. در ﻫﻨﮕﺎم درﻣﺎن رﯾﺸﻪ ﺑﺎﯾﺪ اﯾﻦ ﺗﻨﻮﻋﺎت آﻧﺎﺗﻮﻣﯿﮑﯽ را در ﻧﻈﺮ ﮔﺮﻓﺖ.

Evaluation of root and canal morphology and anatomy of the teeth is essential for successful root treatment. This study aimed to evaluate the morphology and anatomy of the root canal of maxillary second premolars using the cone-beam computed tomography (CBCT) technique in a radiology center. Material and Methods: We used CBCT images of a specialized radiology center archived in 2014 in Qazvin and evaluated them by use of Remexis software. Evaluation of the images was carried out by a radiologist and an endodontist. The number of roots and their morphology, number of canals, the direction of root curvature, and canals in buccolingual and mesiodistal directions were assessed using the chi-square test in two genders. The significance level was considered 5%. Results: A total number of 106 CBCT involving 117-second premolar teeth were evaluated. 93.2 % of the teeth had one root and 6.8 % had two roots. There was no significant difference in the number of roots between the two sexes (Pv=0.164). According to Vertucci classification for single- rooted teeth, 59.6 % were of type I, 20.2 % of type II, 9.2 % of type III, 0.9 % of type IV, 6.4 % of type V, 1.8 % of type VI, and 1.8 % of type VII. Among two rooted second premolar teeth, 87.5 % were of type I and 12.5 % of type III. Conclusion: In maxillary second premolars, the majority of teeth had one root with type I and type II canals. During root treatment, these anatomical variations should be considered.