Posterior Teeth General Morphology Flashcards
What is the shape of the root canal in the maxillary first premolar (cervical cross-section)?
Kidney-shaped.
How many roots and canals does a typical maxillary first premolar have?
Two roots (buccal and lingual), each with one canal.
What is the root canal shape of the maxillary second premolar (cervical cross-section)?
Oval-shaped.
How many roots and canals does a typical maxillary second premolar have?
One root, which may have one or two canals.
What is the usual root and canal configuration for mandibular first premolars?
One root with one canal.
Why is the lingual horn of the mandibular first premolar barely visible in the buccolingual section?
Because the lingual cusp is very small.
What is the shape of the cervical cross-section of mandibular second premolars?
Ovoid.
How many roots and canals does a typical mandibular second premolar have?
One root with one canal.
How many canals do maxillary molars generally have?
Four canals (palatal, distobuccal, mesiobuccal, mesiolingual).
What is the typical access cavity shape for maxillary molars?
Rhomboid or triangular.
How many roots do mandibular molars typically have?
Two roots (mesial and distal).
How many canals are usually found in mandibular molars?
Three canals (one in the distal root, two in the mesial root).
Why is it important to consider the crown’s lingual tilt in mandibular premolars during RCT?
Ignoring the tilt increases the risk of perforation.
