HOME - Clinical cases - Endodontics
15 October 2021

Prevalence of the lingual canal in mandibular premolars

Lara Figini

In mandibular premolars, several morphologic variations of the root and root canals have been reported in the literature including the presence of radicular grooves, C-shaped configuration1, furcation canals, apical ramification, 3-rooted morphology, and double canals. Double canals are generally classified as Vertucci's type V configuration and refer to the presence of a second root canal positioned lingually and are more likely to occur in the first premolars. The orifice of the lingual canal usually has a sharp entry angle and is located at the middle (69%) or apical (31%) thirds, which may contribute to it going unnoticed clinically.

Materials and Methods
In a multicenter study with meta-analysis, published on Journal of Endodontics, August 2021, the authors performed a worldwide analysis of the prevalence of the lingual canal in mandibular premolars and evaluated the influence on patient demographics in 23 countries, using cone-beam computed tomographic images. Cone-beam computed tomographic images of 300 first premolars and 300 second premolars in 23 countries (13,800 teeth in total) were evaluated to identify the presence of a lingual canal, evaluate its configuration and data relating to ethnicity, age and to the sex of the patients following a screening methodology. Statistical significance was set at 5%.

A lingual canal in the mandibular first premolars was found in 23.8% of cases and in the second premolars in 5.3%. Asians and patients over the age of 60 were associated with lower rates of presence of a lingual canal, while Africans and younger groups were associated with higher rates. The prevalence of a lingual canal in males (27.9%) was found to be higher than that in females (20.0%) for only the first premolar. Males were associated with 1,533 and 1,597 more likely to have a lingual root canal in the first and second premolar respectively.

From the data of this study, which must be confirmed in other similar studies, it can be concluded that the lingual root canal is present in the first lower premolars in 23.6% and in the second lower premolars in 5.3%. Ethnicity, geographic region, age, and gender affect prevalence.

Clinical implications
Knowing the worldwide prevalence of a mandibular premolar lingual root canal and the demographic factors that may influence its proportions may help to anticipate possible technical difficulties in root canal treatment.

(Photocredit: Dott. Renzo Raffaelli)

For additional information: Worldwide Prevalence of a Lingual Canal in Mandibular Premolars: A Multicenter Cross-sectional Study with Meta-analysis

Related articles

For the general dentist and the experienced endodontist alike, NuEndo is both a guide and a reference tool for the complex endodontic diagnosis, prognosis, and case selection processes. You will come...

Endodontic postoperative pain is an unpleasant sensation that occurs after root canal treatment. Endodontic postoperative pain occurs in 3 to 58% of the cases- depending on many individual variables-...

Allied Market Research, a market analysis company, has forecast that the dental burs and endodontics market will increase to $2.12 billion by 2028. The increase is from a valuation of $1.28 billion...

With the introduction of nickel-titanium instrument and of the straight-line access there was an increasing amount of success rate of endodontic treatment. Minimally invasive access in endodontics...

Authors:Barbara G. Nunez Torrijos, Gianluca Plotino, Simone Staffoli, Eugenio Pedullà, Maurizio Bossù, Gianluca Gambarini, Antonella Polimeni

Calcium hydroxide apexification and Mineral Trioxide Aggregate (MTA) apexification are classical treatments for necrotic immature permanent teeth, but they still present some drawbacks. With both...

Read more

Florida based National Dentex Labs, maker of prosthetics and restorative dentistry products, has acquired Fager Dental Lab of Pennsylvania. NDX has acquired labs of late in an effort to expand its...

Align Technology, a leading global medical device company that designs, manufactures, and sells the Invisalign system of clear aligners, iTero intraoral scanners, and exocad CAD/CAM software for...

Authors: Giulia Pradal, Daniela Sorrentino, Niccolò Lombardi, Alberto Pispero, Laura Moneghini

A 76-year-old male patient was sent to the oral medicine service of the San Paolo Hospital in Milan for the presence of a radiolucent lesion at the level of the left mandibular corner, found through...

vTail, maker of a platform for healthcare communication, has brought its technology to the US dental market. The app connects healthcare professionals with medical products firms and provides...

Henry Schein announced its presence at the 2021 Greater New York Dental Meeting, featuring a rich lineup of product demonstrations and educational offerings designed to help oral health professionals enhance practice efficiency.

Visitors to the GNYDM can explore the Company’s comprehensive portfolio of products and solutions that help optimize every step of the practice workflow, including digital equipment, technology...


Most popular




Copyright © 2021 - All Rights Reserved
ISSN 2767-1178