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Maxillary premolar cases highlight how anatomy and technical factors can turn expected root canal treatment into a clinical challenge.

The maxillary second premolars are generally known to have a single root and one or two canals, with the most common canal configuration being one canal (Type I) or two canals merging into one (Type II or III).
However, a rare and noteworthy anatomical variation exists: the presence of three roots.
While this variation is more frequently seen in maxillary first premolars, three-rooted second premolars are uncommon and present unique clinical challenges. This article explores the prevalence, clinical implications, and endodontic management considerations for three-rooted upper second maxillary premolars.

Gemination in lower premolars is a very rare condition. This aspect makes it difficult to treat and it should be approached by an endodontist using a microscope to ensure proper debridement, disinfection and obturation.

How a good analysis and a efficient protocol can turn and complex case into success.

This article showing the retreatment of molarized premolare upper 5.

The anatomical relationship between maxillary posterior teeth and the maxillary sinus represents a clinically relevant factor during endodontic treatment. Variations in sinus pneumatization may lead to close proximity or even […]

The management of a necrotic maxillary lateral incisor presenting with fusion and Type III dens invaginatus associated with a periapical lesion represents one of the most biologically and technically demanding […]

Mandibular molars exhibit one of the highest degrees of anatomical variability in the human dentition. While the classical configuration involves two or three canals, extreme variations exist, ranging from simplified […]

Successful endodontic therapy begins with a properly designed access cavity, which is the foundation for locating, cleaning, and shaping the root canal system. Inadequate or misdirected access can lead to […]

Re-treatment of C-shaped mandibular molars demands 3D cleaning and sealing beyond files; a stepwise strategy improves predictability.

The c-shaped canal is an antomical variation that was first reported by Cooke & Cox in 1979 and mostly seed in mandibular molars, although it can occur also in mandibular premolars and maxillary molars

Mandibular molar retreatment due to an missed middle mesial canal. CBCT and Operanting Microscope are essential to identify the etiology and achieve three-dimensional disinfection. A Case Report