ArticleScientific reports2025
Root and canal configurations of maxillary first premolars in 22 countries using two classification systems: a multinational cross-sectional study.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Educational implications of a novel system for classifying root and canal anatomy in the human dentition: a narrative review.Restorative dentistry & endodontics · 2026Article
- Comparative performance of the ahmed and vertucci systems in classifying mandibular premolar canal morphology: a Bayesian and information-theoretic analysis.Scientific reports · 2026Article
- Assessment of healing after primer endodontic treatment and retreatment using fractal analysis and PAI score over a 24-month follow-up.Scientific reports · 2026Article
- Remaining dentine thickness following post space preparation in maxillary and mandibular molars: a micro-computed tomography study.Odontology · 2026Article
- Root canal and nasopalatine canal morphology in a Guangxi population: a cone-beam CT study on regional variations.BMC oral health · 2026Article
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Authors and funding
26 authors.
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Abstract
This study aimed to evaluate the root and root canal morphology of maxillary first premolars (M1Ps) globally using cone-beam computed tomography (CBCT), comparing results with Vertucci's and Ahmed et al.'s classification systems. CBCT images were obtained for various purposes such as orthodontic treatment planning, tooth impaction, implant surgery, and trauma cases. M1Ps were evaluated in three planes to determine root and root canal morphology, and root bifurcation levels were assessed using integrated software. Prevalence variations between countries and overall prevalence were analyzed using meta-analysis software. A total of 6,600 patients (13,200 bilateral M1Ps) were examined. According to Vertucci's classification, Type IV (59%), Type II (12%), Type I (9%), and Type III (8%) were the most common configurations. Based on Ahmed's classification,
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