![]() In the distal roots of mandibular molars, the prevalence is 25-30%. ![]() In some groups of teeth such as mandibular incisors and maxillary second premolars, however, the prevalence is greater than 50%. (2000), 12 long oval canals occur in the apical portion in about 25% of cases. A cross-section of a mandibular canine with an oval shaped canal is shown in Figure 1.Ī high prevalence of oval and long oval root canals (even in the apical area) has been reported ( Table 1). (2004) 11 defined "oval" as having a maximum diameter of up to two times greater than the minimum diameter and ''long oval'' as having a maximum diameter of two to four times greater than the minimum diameter. The purpose of this literature review was to emphasize the different aspects of the anatomy, instrumentation and obturation of oval shaped canals.Ĭross-sectional root canal configurations have been classified as round, oval, long oval, flattened or irregular. 10 Oval shaped canals pose may questions to the operator during the instrumentation and obturation phase of root canal treatment. Isthmuses, inter-canal communications, curvatures and oval shaped canals can make disinfection a considerable challenge. ![]() The intrinsic anatomy of the root canal system creates further challenges, emphasizing the necessity of proper disinfection measures. Although this approach will remove more contaminated dentine and allow better penetration of irrigants into the apical region, it will also predispose the root canal to a risk of stripping, transportation and the tooth itself to weakening. (2006) 8 concluded that, in order to overcome this limitation, the size of the apical preparation should be increased. 4,5 It has been shown that mechanical instrumentation techniques alone leave large amounts of the canal wall un-instrumented. 2,3Īdequate mechanical instrumentation is required in addition to effective irrigation to achieve sufficient disinfection during endodontic treatment. 1 To achieve this goal, clinicians must have adequate knowledge regarding normal root canal anatomy of the relevant tooth and its common variations. A proper coronal restoration is vital to prevent coronal ingress of microorganisms and their byproducts. One of the main objectives of root canal treatment is the thorough chemical/mechanical debridement of the root canal system and its complete obturation with a suitable material. ![]() Key words: Oval shaped canal, anatomy, endodontics. The aim of this study was to address the definition, prevalence, and treatment protocols for oval shaped canals. Because of the importance of executing a suitable treatment option for oval shaped canals, a comprehensive review of published information is vital. The recognition of oval configurations determines that a different approach be applied in cleaning, shaping and obturation. The oval shaped canals should have a different approach regarding management compared with normal root canal configurations. Cross-sectional root canal configurations have been classified as round, oval, long oval, flattened, or irregular. To achieve this goal, clinicians must have a comprehensive knowledge of the normal anatomy of the relevant root canal system and its common variations. One of the main objectives of endodontic treatment is the thorough preparation of the root canal system and proper obturation for obtaining a three-dimensional seal. Dental Research Centre, Department of Endodontics, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran Iranian Centre for Endodontic Research (ICER), Research Institute of Dental Sciences, Shaheed Beheshti University of Medical Sciences, Tehran, Iran and Iranian National Elite Foundation, Tehran, Iran Z Mohammadi I S Shalavi II H Jafarzadeh III The oval shaped, root canal: A clinical review
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