PMC3415095_01
Gross Specimen showing dilation of root.
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fig1
This tooth had 3 cups, a small buccal cusp, a small mesiolingual, and a large distolingual cusp but retaining the Y-shaped groove (Figure 1).
Cropped orthopatomogram showing invagination in root of mandibular right first premolar.
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fig2
The mandibular right 2nd premolar revealed an invagination into the pulpal chamber of the tooth from the radicular portion and periapical radiolucency with an ill-defined border was present around the apex on lateral aspect of the root (Figure 2).
Longitudinal section of involved tooth showing invagination in root of mandibular right first premolar.
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fig3
The pulp extended from the apical foramen to the cervical region of the tooth then split just below the cemento-enamel junction (Figure 3).