Fig. 4From: Root form and canal morphology of maxillary first premolars of a Yemeni populationCleared teeth showing new canal types of Yemeni permanent maxillary first premolars. a Type (1–2-3), (b) Type (1–2–1-2-1), (c) Type (1–2–1-3-2), (d) Type (1–2–1-2-3-2), (e) Type (1–3-4), and (f) Type (1–2–1-3-2)Back to article page