Root canal morphology of mandibular first and second premolars

Zillich, Richard M.; Dowson, John

doi:10.1016/0030-4220(73)90147-3

Cited by 158 publications

(150 citation statements)

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“…Zillich and Dowson reported 11.7% and 0.4% occurrence of two canals and three canals in mandibular premolars respectively [4]. Cleghorn et al in a literature review, reported that the incidence of an additional root (0.4%), an additional canal (9.9%), and an additional apical exit (8.2%) in the mandibular second bicuspids is lower than that of the mandibular first bicuspids (2.0%, 24.2%, and 21.1%, respectively) [5].Overall, an accessory root was present only in about 0.0-4.4% (average 0.61%) of teeth as reported in a systematic review by Kottoor et al [6].In Indian population, this presentation of second premolars with two root canals was reported to be 13.5-20% [7].Hence, the endodontic management of mandibular second premolars with variable canal configuration can be diagnostically and technically challenging.…”

Section: *Correspondencementioning

confidence: 98%

Intraoral radiographic diagnosis and management of an aberrant mandibular premolar-a case report

Balasubramanian¹,

Vinayachandran²,

Warrier³

et al. 2017

APJHS

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Mandibular premolars are known for their aberrant root canal variations. This is because, they are highly unpredictable and often present with a wide variety of morphological variations. Slowey et al. reported that these root canal aberrations in mandibular premolars present an endodontic challenge to the dental practitioners.Hence, these teeth may require skillful and careful root canal preparation and canal filling techniques. One of the major reasons for failure of root canal treatment can be attributed to the unobserved canals by the operator during the procedure. This article reports and discusses the successful endodontic management of a mandibular second premolar, with an atypical canal pattern that has been missed by the dentist inadvertently in the initial appointment.

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Section: *Correspondencementioning

confidence: 98%

Intraoral radiographic diagnosis and management of an aberrant mandibular premolar-a case report

Balasubramanian¹,

Vinayachandran²,

Warrier³

et al. 2017

APJHS

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“…Vertucci 4) and Zillich et al 5) reported the occurrence of three canals in mandibular first premolars at 0.5% and 0.4% respectively. Their studies in second premolars showed these percentages at 0.0% and 0.4%, respectively.…”

Section: )mentioning

confidence: 98%

“…2,3) Especially, the occurrence of three canals with three separate foramina in mandibular premolars is very rare. Vertucci 4) and Zillich et al 5) reported the occurrence of three canals in mandibular first premolars at 0.5% and 0.4% respectively. Their studies in second premolars showed these percentages at 0.0% and 0.4%, respectively.…”

Section: ⅰ Introductionmentioning

confidence: 98%

Root canal treatment of a mandibular second premolar with three separate root canals

Lee

Shin

Hong

et al. 2010

J Korean Acad Conserv Dent

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Mandibular premolars show a wide variety of root canal anatomy. Especially, the occurrence of three canals with three separate foramina in mandibular second premolars is very rare. This case report describes the root canal treatment of an unusual morphological configuration of the root canal system and supplements previous reports of the existence of such configuration in mandibular second premolar. Ⅰ. IntroductionSuccessful root canal treatment requires an understanding of root canal morphology and anatomy. Accurate diagnosis of root canal morphology and anatomy is essential for thorough shaping and cleaning of the entire root canal system and consequent successful root canal treatment.1) Mandibular premolars show a wide variety of root canal anatomy. 2)There seems to be a racial predisposition for the presence of two or more canals in maxillary and mandibular premolars, as well as their bilateral occurrence.2,3) Especially, the occurrence of three canals with three separate foramina in mandibular premolars is very rare. Vertucci 4) and Zillich et al 5) reported the occurrence of three canals in mandibular first premolars at 0.5% and 0.4% respectively. Their studies in second premolars showed these percentages at 0.0% and 0.4%, respectively. To our knowledge, however, there is rare case report about treatment of mandibular second premolar with three separate canals divided at the apical level of the root whereas most previous reports showed that the orifices were found in the mid root section.6) The present case report describes the root canal treatment of a mandibular second premolar having three independent root canals with separate foramina. Ⅱ. Case ReportA 27-year-old man with a noncontributory medical history was referred because of occasionally slight spontaneous pain in the mandibular left second premolar. The tooth was diagnosed as irreversible pulpitis and initiated to have root canal treatment by general dentist 2 days ago, but could not negotiate all of the root canals. After this treatment, the initial acute symptom had been relieved, but the tooth was still symptomatic and tender to percussion. A radiographic image of the tooth showed an unusual anatomy of these teeth (Figure 1). According to clinical and radiographic examination, a diagnosis of pulp necrosis with apical periodontitis was made.The tooth was anaesthetized, isolated with rubber dam and temporary filling was removed. The apical third was explored to locate the canal orifices using ABSTRACT *Corresponding

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“…One study stated this to be 12%. 7 Another study revealed that only 2.5% had two apical foramina. 8 Consequently, it is a much easier tooth to treat compared with the mandibular first premolar, unless the radiograph reveals a sharp distal curve at the apex as shown in the extracted tooth at Figure 9.…”

Section: Mandibular Second Premolarmentioning

confidence: 98%

Endodontics: Part 4 Morphology of the root canal system

Carrotte¹

2004

Br Dent J

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Root canal morphology of mandibular first and second premolars

Cited by 158 publications

References 1 publication

Intraoral radiographic diagnosis and management of an aberrant mandibular premolar-a case report

Intraoral radiographic diagnosis and management of an aberrant mandibular premolar-a case report

Root canal treatment of a mandibular second premolar with three separate root canals

Endodontics: Part 4 Morphology of the root canal system

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