Bifurcated Root Canals and Crown Diameter

Miyoshi, S; Fujiwara, Jyo; Tsuji, Yoshi Haru; Nakata, Toshiyuki; Yamamoto, Katsuhiko

doi:10.1177/00220345770560112901

Cited by 32 publications

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“…In mandibular second premolars, we also found that all had one root and most had only one canal, in agreement with the findings of Miyoshi et al [26]. However, these results are somewhat different to those reported in other studies.…”

Section: Discussionsupporting

confidence: 89%

Cone-beam computed tomography study of root and canal morphology of mandibular premolars in a western Chinese population

Guo

et al. 2012

BMC Med Imaging

110

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BackgroundTraditional radiography is limited in its ability to give reliable information on the number and morphology of root canals. The application of cone-beam computed tomography (CBCT) provides a non-invasive three-dimensional confirmatory diagnosis as a complement to conventional radiography. The aim of this study was to evaluate the root and canal morphology of mandibular premolars in a western Chinese population using CBCT scanning.MethodsThe sample included 149 CBCT images comprising 178 mandibular first premolars and 178 second premolars. The tooth position, number of roots and canals, and canal configuration according to Vertucci’s classification were recorded.ResultsThe results showed that 98% of mandibular first premolars had one root and 2% had two roots; 87.1% had one canal, 11.2% had two canals and 0.6% had three canals. The prevalence of C-shaped canals was 1.1%. All mandibular second premolars had one root; 97.2% had one canal and 2.2% had two canals. The prevalence of C-shaped canals was 0.6%.ConclusionsThe prevalence of multiple canals in mandibular first premolars was mainly of Type V, and mandibular second premolars had a low rate of canal variation in this western Chinese population. Root canal bifurcation occurred at the middle or apical third in most bicanal mandibular premolars. CBCT scanning can be used in the management of mandibular premolars with complex canal morphology.

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Section: Discussionsupporting

confidence: 89%

Cone-beam computed tomography study of root and canal morphology of mandibular premolars in a western Chinese population

Guo

et al. 2012

BMC Med Imaging

110

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“…Vertucci (1984) has reported the incidence of two canals to be 22.0% for mandibular canines in a study on an American Caucasian population. Meanwhile, I 1 and I 2 have been reported to have 17.1% and 20.3% two canals, respectively in a Japanese population (Miyoshi et al, 1977). Walker (1988d) has determined this ratio to be 22.0% for I 1 and 32% for I 2 in a southern Chinese population.…”

Section: Discussionmentioning

confidence: 98%

Root and canal morphology of human permanent teeth in a Sri Lankan and Japanese population

Peiris

2008

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The main purpose of this study was to investigate the root and canal morphology of Sri Lankan and Japanese permanent dentition. Two thousand Sri Lankan and 976 Japanese permanent teeth were examined. The number of roots in premolars and molars and the prevalence of C-shaped (gutter shaped) roots in mandibular second molars were recorded. Root canal morphology was studied using a clearing technique. The examination of root canal systems of the teeth was based on Vertucci's classification. A higher prevalence of two-rooted maxillary first premolars was observed in Sri Lankans than in Japanese. Sri Lankan maxillary first and second premolars displayed a higher incidence of two canal and two apical foramina forms than those of Japanese. Canal morphology of mandibular first premolars showed higher occurrence of two canals with type V (1-2) canal configuration in Sri Lankans than in Japanese. In mandibular molars, Japanese presented with a higher incidence of threerooted first molars and one-rooted second molars than Sri Lankans. C-shaped root was seen in 5.7% of Sri Lankan and 18.8% of Japanese second molars examined. In the distal root of mandibular first molars, Japanese showed a higher prevalence of two apical foramina with type IV (2) and additional canal forms than that of Sri Lankans. Japanese mandibular second molars exhibited a higher occurrence of one-root canal forms than that of Sri Lankans. In addition, mandibular incisors and canines of Sri Lankans showed a higher prevalence of two canals with type III (1-2-1) canal form than Japanese. Root and canal morphologies of Japanese and Sri Lankan people are consistent with those of people of East Asian and European (western Eurasia) origin, respectively. In human dentition, the differences of the internal canal morphology are more evident and constant than that of external root morphology among different population groups.

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“…Intersecting lines point out that additional roots or root canals exist (Hülsmann 1992). A general guideline is that if the mid‐root image diameter appears equal to or greater than the crown image diameter, then the tooth most likely has a variation in root canal configuration (Miyoshi et al . 1977).…”

Section: Discussionmentioning

confidence: 99%

“…Walker (1988) investigated 100 mandibular first premolars in a southern Chinese population, and reported on 34 teeth with two separate canals and 2 teeth with three root canals. In a study of 516 mandibular first premolars of a Japanese population, Miyoshi et al . (1977) found 71 cases (13%) with two root canals.…”

Section: Introductionmentioning

confidence: 99%

Diagnosis and root canal treatment of a mandibular second premolar with three root canals

Rödig

Hülsmann

2003

Int Endodontic J

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Bifurcated Root Canals and Crown Diameter

Cited by 32 publications

References 0 publications

Cone-beam computed tomography study of root and canal morphology of mandibular premolars in a western Chinese population

Cone-beam computed tomography study of root and canal morphology of mandibular premolars in a western Chinese population

Root and canal morphology of human permanent teeth in a Sri Lankan and Japanese population

Diagnosis and root canal treatment of a mandibular second premolar with three root canals

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