Maxillary 1st premolar roots

The maxillary second premolar and both the mandibular first and second premolars usually have one centrally located root canal. However, if the canal appears to be situated under either the buccal or lingual cusp, look carefully for a second canal under the opposite cusp. Although it usually has two canals, it may rarely have three and this third canal can easily be missed.

Most commonly biroote the maxillary first premolar is a transitional tooth between incisor and molar. Loss of the posterior molars subjects the premolars to heavy occlusal loads.

Removable appliances increase torque on these frequently clasped teeth, and the additional forces, in concert with deep carious lesions, can induce heavy calcification of the pulp chambers. Teeth with fracture, metallic restorations, deep caries, and incompletely formed roots were excluded. The rooted teeth have buccal or palatal roots. If the mesiodistal distance distance is equal to or wider in the root than the crown, expect three roots.

The number of canals each first premolar have – have canals, have canal, and have canals. Type IV, are Type II, are Type I. Root canal morphology of the maxillary first premolar.

Vertucci FJ, Gegauff A. Four hundred maxillary first premolars were decalcifie injected with dye, cleare and studied. The canal configurations were categorized as: had one canal, had two canals, and had three canals at the apex. Upper 1st premolars - roots. Lower 1st and 2nd premolars (bicuspids) - Just have root.

Variability in the number of root canals. The function of this premolar is similar to that. The frequency of two roots is more than in Caucasoids and less than in Mongoloids. The roots maybe completely separate or arise as twin projections from a common mid-trunk.

The maxillary first premolar has variable morphology but is generally considered to have two roots and two canals (Fig. 8). Three-rooted maxillary first premolars are uncommon, with an incidence of 0. Mandibular second premolars have been shown to have root canal at the apex in 97. In many ways this is the most difficult tooth to treat, as it can have a complex canal system. Second premolars vary individually more than first premolars.

A maxillary second premolar may have a crown that is noticeably smaller cervicoocclusally and mesiodistally. On the other han it may be larger in those dimensions and usually is.

Generally the root of a second premolar is longer than that of a first premolar. External root morphology. The mesiobuccal root is broad distobuccal and has prominent depressions or flutings on its mesial and distal surfaces. The internal canal morphology is highly variable, but the majority of the mesiobuccal roots contain two canals.

Similar to the first premolar in coronal morphology, the second premolar varies mainly in root form. Its crown is narrower in the buccal-palatal dimension and slightly wider in the mesial-distal. Maxillary Second Premolar.

The canal orifice is centrally located but often appears more as a slot than as a single ovoid opening. The facial ridge is not as prominent as that of the maxillary 1st premolar.